1284 lines
35 KiB
C
1284 lines
35 KiB
C
/*-
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* Copyright (C) 1996
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* David L. Nugent. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <sys/param.h>
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#include <dirent.h>
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#include <paths.h>
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#include <termios.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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#include <utmp.h>
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#include <login_cap.h>
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#if defined(USE_MD5RAND)
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#include <md5.h>
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#endif
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#include "pw.h"
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#include "bitmap.h"
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#if (MAXLOGNAME-1) > UT_NAMESIZE
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#define LOGNAMESIZE UT_NAMESIZE
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#else
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#define LOGNAMESIZE (MAXLOGNAME-1)
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#endif
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static int randinit;
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static char locked_str[] = "*LOCKED*";
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static int print_user(struct passwd * pwd, int pretty, int v7);
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static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args);
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static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
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static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
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static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args);
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static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
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static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
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static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
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static char *shell_path(char const * path, char *shells[], char *sh);
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static void rmat(uid_t uid);
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static void rmskey(char const * name);
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/*-
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* -C config configuration file
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* -q quiet operation
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* -n name login name
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* -u uid user id
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* -c comment user name/comment
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* -d directory home directory
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* -e date account expiry date
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* -p date password expiry date
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* -g grp primary group
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* -G grp1,grp2 additional groups
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* -m [ -k dir ] create and set up home
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* -s shell name of login shell
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* -o duplicate uid ok
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* -L class user class
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* -l name new login name
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* -h fd password filehandle
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* -F force print or add
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* Setting defaults:
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* -D set user defaults
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* -b dir default home root dir
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* -e period default expiry period
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* -p period default password change period
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* -g group default group
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* -G grp1,grp2.. default additional groups
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* -L class default login class
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* -k dir default home skeleton
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* -s shell default shell
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* -w method default password method
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*/
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int
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pw_user(struct userconf * cnf, int mode, struct cargs * args)
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{
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int rc, edited = 0;
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char *p = NULL;
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char *passtmp;
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struct carg *a_name;
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struct carg *a_uid;
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struct carg *arg;
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struct passwd *pwd = NULL;
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struct group *grp;
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struct stat st;
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char line[_PASSWORD_LEN+1];
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static struct passwd fakeuser =
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{
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NULL,
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"*",
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-1,
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-1,
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0,
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"",
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"User &",
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"/nonexistent",
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"/bin/sh",
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0
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#if defined(__FreeBSD__)
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,0
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#endif
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};
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/*
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* With M_NEXT, we only need to return the
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* next uid to stdout
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*/
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if (mode == M_NEXT)
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{
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uid_t next = pw_uidpolicy(cnf, args);
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if (getarg(args, 'q'))
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return next;
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printf("%ld:", (long)next);
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pw_group(cnf, mode, args);
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return EXIT_SUCCESS;
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}
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/*
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* We can do all of the common legwork here
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*/
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if ((arg = getarg(args, 'b')) != NULL) {
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cnf->home = arg->val;
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}
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/*
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* If we'll need to use it or we're updating it,
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* then create the base home directory if necessary
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*/
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if (arg != NULL || getarg(args, 'm') != NULL) {
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int l = strlen(cnf->home);
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if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */
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cnf->home[--l] = '\0';
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if (l < 2 || *cnf->home != '/') /* Check for absolute path name */
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errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
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if (stat(cnf->home, &st) == -1) {
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char dbuf[MAXPATHLEN];
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/*
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* This is a kludge especially for Joerg :)
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* If the home directory would be created in the root partition, then
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* we really create it under /usr which is likely to have more space.
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* But we create a symlink from cnf->home -> "/usr" -> cnf->home
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*/
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if (strchr(cnf->home+1, '/') == NULL) {
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strcpy(dbuf, "/usr");
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strncat(dbuf, cnf->home, MAXPATHLEN-5);
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if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) {
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chown(dbuf, 0, 0);
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symlink(dbuf, cnf->home);
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}
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/* If this falls, fall back to old method */
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}
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p = strncpy(dbuf, cnf->home, sizeof dbuf);
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dbuf[MAXPATHLEN-1] = '\0';
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if (stat(dbuf, &st) == -1) {
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while ((p = strchr(++p, '/')) != NULL) {
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*p = '\0';
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if (stat(dbuf, &st) == -1) {
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if (mkdir(dbuf, 0755) == -1)
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goto direrr;
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chown(dbuf, 0, 0);
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} else if (!S_ISDIR(st.st_mode))
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errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
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*p = '/';
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}
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}
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if (stat(dbuf, &st) == -1) {
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if (mkdir(dbuf, 0755) == -1) {
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direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
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}
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chown(dbuf, 0, 0);
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}
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} else if (!S_ISDIR(st.st_mode))
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errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
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}
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if ((arg = getarg(args, 'e')) != NULL)
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cnf->expire_days = atoi(arg->val);
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if ((arg = getarg(args, 'y')) != NULL)
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cnf->nispasswd = arg->val;
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if ((arg = getarg(args, 'p')) != NULL && arg->val)
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cnf->password_days = atoi(arg->val);
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if ((arg = getarg(args, 'g')) != NULL) {
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if (!*(p = arg->val)) /* Handle empty group list specially */
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cnf->default_group = "";
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else {
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if ((grp = GETGRNAM(p)) == NULL) {
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if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
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errx(EX_NOUSER, "group `%s' does not exist", p);
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}
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cnf->default_group = newstr(grp->gr_name);
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}
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}
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if ((arg = getarg(args, 'L')) != NULL)
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cnf->default_class = pw_checkname((u_char *)arg->val, 0);
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if ((arg = getarg(args, 'G')) != NULL && arg->val) {
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int i = 0;
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for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
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if ((grp = GETGRNAM(p)) == NULL) {
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if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
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errx(EX_NOUSER, "group `%s' does not exist", p);
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}
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if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
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cnf->groups[i++] = newstr(grp->gr_name);
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}
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while (i < cnf->numgroups)
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cnf->groups[i++] = NULL;
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}
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if ((arg = getarg(args, 'k')) != NULL) {
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if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
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errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
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}
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if ((arg = getarg(args, 's')) != NULL)
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cnf->shell_default = arg->val;
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if ((arg = getarg(args, 'w')) != NULL)
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cnf->default_password = boolean_val(arg->val, cnf->default_password);
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if (mode == M_ADD && getarg(args, 'D')) {
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if (getarg(args, 'n') != NULL)
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errx(EX_DATAERR, "can't combine `-D' with `-n name'");
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if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
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if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
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cnf->min_uid = 1000;
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if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
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cnf->max_uid = 32000;
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}
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if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
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if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
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cnf->min_gid = 1000;
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if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
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cnf->max_gid = 32000;
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}
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arg = getarg(args, 'C');
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if (write_userconfig(arg ? arg->val : NULL))
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return EXIT_SUCCESS;
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warn("config update");
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return EX_IOERR;
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}
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if (mode == M_PRINT && getarg(args, 'a')) {
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int pretty = getarg(args, 'P') != NULL;
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int v7 = getarg(args, '7') != NULL;
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SETPWENT();
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while ((pwd = GETPWENT()) != NULL)
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print_user(pwd, pretty, v7);
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ENDPWENT();
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return EXIT_SUCCESS;
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}
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if ((a_name = getarg(args, 'n')) != NULL)
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pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
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a_uid = getarg(args, 'u');
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if (a_uid == NULL) {
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if (a_name == NULL)
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errx(EX_DATAERR, "user name or id required");
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/*
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* Determine whether 'n' switch is name or uid - we don't
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* really don't really care which we have, but we need to
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* know.
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*/
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if (mode != M_ADD && pwd == NULL
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&& strspn(a_name->val, "0123456789") == strlen(a_name->val)
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&& atoi(a_name->val) > 0) { /* Assume uid */
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(a_uid = a_name)->ch = 'u';
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a_name = NULL;
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}
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}
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/*
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* Update, delete & print require that the user exists
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*/
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if (mode == M_UPDATE || mode == M_DELETE ||
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mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) {
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if (a_name == NULL && pwd == NULL) /* Try harder */
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pwd = GETPWUID(atoi(a_uid->val));
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if (pwd == NULL) {
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if (mode == M_PRINT && getarg(args, 'F')) {
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fakeuser.pw_name = a_name ? a_name->val : "nouser";
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fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
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return print_user(&fakeuser,
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getarg(args, 'P') != NULL,
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getarg(args, '7') != NULL);
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}
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if (a_name == NULL)
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errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
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errx(EX_NOUSER, "no such user `%s'", a_name->val);
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}
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if (a_name == NULL) /* May be needed later */
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a_name = addarg(args, 'n', newstr(pwd->pw_name));
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/*
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* The M_LOCK and M_UNLOCK functions simply add or remove
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* a "*LOCKED*" prefix from in front of the password to
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* prevent it decoding correctly, and therefore prevents
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* access. Of course, this only prevents access via
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* password authentication (not ssh, kerberos or any
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* other method that does not use the UNIX password) but
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* that is a known limitation.
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*/
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if (mode == M_LOCK) {
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if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
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errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
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passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
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if (passtmp == NULL) /* disaster */
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errx(EX_UNAVAILABLE, "out of memory");
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strcpy(passtmp, locked_str);
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strcat(passtmp, pwd->pw_passwd);
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pwd->pw_passwd = passtmp;
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edited = 1;
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} else if (mode == M_UNLOCK) {
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if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
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errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
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pwd->pw_passwd += sizeof(locked_str)-1;
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edited = 1;
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} else if (mode == M_DELETE) {
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/*
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* Handle deletions now
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*/
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char file[MAXPATHLEN];
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char home[MAXPATHLEN];
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uid_t uid = pwd->pw_uid;
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if (strcmp(pwd->pw_name, "root") == 0)
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errx(EX_DATAERR, "cannot remove user 'root'");
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if (!PWALTDIR()) {
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/*
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* Remove skey record from /etc/skeykeys
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*/
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rmskey(pwd->pw_name);
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/*
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* Remove crontabs
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*/
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sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
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if (access(file, F_OK) == 0) {
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sprintf(file, "crontab -u %s -r", pwd->pw_name);
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system(file);
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}
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}
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/*
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* Save these for later, since contents of pwd may be
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* invalidated by deletion
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*/
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sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
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strncpy(home, pwd->pw_dir, sizeof home);
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home[sizeof home - 1] = '\0';
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rc = delpwent(pwd);
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if (rc == -1)
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err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
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else if (rc != 0) {
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warn("passwd update");
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return EX_IOERR;
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}
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if (cnf->nispasswd && *cnf->nispasswd=='/') {
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rc = delnispwent(cnf->nispasswd, a_name->val);
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if (rc == -1)
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warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
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else if (rc != 0)
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warn("WARNING: NIS passwd update");
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/* non-fatal */
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}
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editgroups(a_name->val, NULL);
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pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
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if (!PWALTDIR()) {
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/*
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* Remove mail file
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|
*/
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|
remove(file);
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/*
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|
* Remove at jobs
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|
*/
|
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if (getpwuid(uid) == NULL)
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rmat(uid);
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|
|
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/*
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|
* Remove home directory and contents
|
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*/
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if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
|
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if (stat(home, &st) != -1) {
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rm_r(home, uid);
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pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
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a_name->val, (long) uid, home,
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stat(home, &st) == -1 ? "" : "not completely ");
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}
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}
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}
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return EXIT_SUCCESS;
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} else if (mode == M_PRINT)
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return print_user(pwd,
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getarg(args, 'P') != NULL,
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getarg(args, '7') != NULL);
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|
|
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/*
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* The rest is edit code
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|
*/
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if ((arg = getarg(args, 'l')) != NULL) {
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if (strcmp(pwd->pw_name, "root") == 0)
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errx(EX_DATAERR, "can't rename `root' account");
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pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
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edited = 1;
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}
|
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if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
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pwd->pw_uid = (uid_t) atol(arg->val);
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edited = 1;
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if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
|
|
errx(EX_DATAERR, "can't change uid of `root' account");
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|
if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
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|
warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
|
|
}
|
|
|
|
if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */
|
|
gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
|
|
if (newgid != pwd->pw_gid) {
|
|
edited = 1;
|
|
pwd->pw_gid = newgid;
|
|
}
|
|
}
|
|
|
|
if ((arg = getarg(args, 'p')) != NULL) {
|
|
if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
|
|
if (pwd->pw_change != 0) {
|
|
pwd->pw_change = 0;
|
|
edited = 1;
|
|
}
|
|
}
|
|
else {
|
|
time_t now = time(NULL);
|
|
time_t expire = parse_date(now, arg->val);
|
|
|
|
if (now == expire)
|
|
errx(EX_DATAERR, "invalid password change date `%s'", arg->val);
|
|
if (pwd->pw_change != expire) {
|
|
pwd->pw_change = expire;
|
|
edited = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((arg = getarg(args, 'e')) != NULL) {
|
|
if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
|
|
if (pwd->pw_expire != 0) {
|
|
pwd->pw_expire = 0;
|
|
edited = 1;
|
|
}
|
|
}
|
|
else {
|
|
time_t now = time(NULL);
|
|
time_t expire = parse_date(now, arg->val);
|
|
|
|
if (now == expire)
|
|
errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val);
|
|
if (pwd->pw_expire != expire) {
|
|
pwd->pw_expire = expire;
|
|
edited = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((arg = getarg(args, 's')) != NULL) {
|
|
char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
|
|
if (shell == NULL)
|
|
shell = "";
|
|
if (strcmp(shell, pwd->pw_shell) != 0) {
|
|
pwd->pw_shell = shell;
|
|
edited = 1;
|
|
}
|
|
}
|
|
|
|
if (getarg(args, 'L')) {
|
|
if (cnf->default_class == NULL)
|
|
cnf->default_class = "";
|
|
if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
|
|
pwd->pw_class = cnf->default_class;
|
|
edited = 1;
|
|
}
|
|
}
|
|
|
|
if ((arg = getarg(args, 'd')) != NULL) {
|
|
edited = strcmp(pwd->pw_dir, arg->val) != 0;
|
|
if (stat(pwd->pw_dir = arg->val, &st) == -1) {
|
|
if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
|
|
warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
|
|
} else if (!S_ISDIR(st.st_mode))
|
|
warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
|
|
}
|
|
|
|
if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL) {
|
|
login_cap_t *lc;
|
|
|
|
lc = login_getpwclass(pwd);
|
|
if (lc == NULL ||
|
|
login_setcryptfmt(lc, "md5", NULL) == NULL)
|
|
warn("setting crypt(3) format");
|
|
login_close(lc);
|
|
pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
|
|
edited = 1;
|
|
}
|
|
|
|
} else {
|
|
login_cap_t *lc;
|
|
|
|
/*
|
|
* Add code
|
|
*/
|
|
|
|
if (a_name == NULL) /* Required */
|
|
errx(EX_DATAERR, "login name required");
|
|
else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
|
|
errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
|
|
|
|
/*
|
|
* Now, set up defaults for a new user
|
|
*/
|
|
pwd = &fakeuser;
|
|
pwd->pw_name = a_name->val;
|
|
pwd->pw_class = cnf->default_class ? cnf->default_class : "";
|
|
pwd->pw_uid = pw_uidpolicy(cnf, args);
|
|
pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
|
|
pwd->pw_change = pw_pwdpolicy(cnf, args);
|
|
pwd->pw_expire = pw_exppolicy(cnf, args);
|
|
pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
|
|
pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
|
|
lc = login_getpwclass(pwd);
|
|
if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
|
|
warn("setting crypt(3) format");
|
|
login_close(lc);
|
|
pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
|
|
edited = 1;
|
|
|
|
if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
|
|
warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
|
|
}
|
|
|
|
/*
|
|
* Shared add/edit code
|
|
*/
|
|
if ((arg = getarg(args, 'c')) != NULL) {
|
|
char *gecos = pw_checkname((u_char *)arg->val, 1);
|
|
if (strcmp(pwd->pw_gecos, gecos) != 0) {
|
|
pwd->pw_gecos = gecos;
|
|
edited = 1;
|
|
}
|
|
}
|
|
|
|
if ((arg = getarg(args, 'h')) != NULL) {
|
|
if (strcmp(arg->val, "-") == 0) {
|
|
if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
|
|
pwd->pw_passwd = "*"; /* No access */
|
|
edited = 1;
|
|
}
|
|
} else {
|
|
int fd = atoi(arg->val);
|
|
int b;
|
|
int istty = isatty(fd);
|
|
struct termios t;
|
|
login_cap_t *lc;
|
|
|
|
if (istty) {
|
|
if (tcgetattr(fd, &t) == -1)
|
|
istty = 0;
|
|
else {
|
|
struct termios n = t;
|
|
|
|
/* Disable echo */
|
|
n.c_lflag &= ~(ECHO);
|
|
tcsetattr(fd, TCSANOW, &n);
|
|
printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name);
|
|
fflush(stdout);
|
|
}
|
|
}
|
|
b = read(fd, line, sizeof(line) - 1);
|
|
if (istty) { /* Restore state */
|
|
tcsetattr(fd, TCSANOW, &t);
|
|
fputc('\n', stdout);
|
|
fflush(stdout);
|
|
}
|
|
if (b < 0) {
|
|
warn("-h file descriptor");
|
|
return EX_IOERR;
|
|
}
|
|
line[b] = '\0';
|
|
if ((p = strpbrk(line, " \t\r\n")) != NULL)
|
|
*p = '\0';
|
|
if (!*line)
|
|
errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
|
|
lc = login_getpwclass(pwd);
|
|
if (lc == NULL ||
|
|
login_setcryptfmt(lc, "md5", NULL) == NULL)
|
|
warn("setting crypt(3) format");
|
|
login_close(lc);
|
|
pwd->pw_passwd = pw_pwcrypt(line);
|
|
edited = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Special case: -N only displays & exits
|
|
*/
|
|
if (getarg(args, 'N') != NULL)
|
|
return print_user(pwd,
|
|
getarg(args, 'P') != NULL,
|
|
getarg(args, '7') != NULL);
|
|
|
|
if (mode == M_ADD) {
|
|
edited = 1; /* Always */
|
|
rc = addpwent(pwd);
|
|
if (rc == -1) {
|
|
warnx("user '%s' already exists", pwd->pw_name);
|
|
return EX_IOERR;
|
|
} else if (rc != 0) {
|
|
warn("passwd file update");
|
|
return EX_IOERR;
|
|
}
|
|
if (cnf->nispasswd && *cnf->nispasswd=='/') {
|
|
rc = addnispwent(cnf->nispasswd, pwd);
|
|
if (rc == -1)
|
|
warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
|
|
else
|
|
warn("NIS passwd update");
|
|
/* NOTE: we treat NIS-only update errors as non-fatal */
|
|
}
|
|
} else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
|
|
if (edited) { /* Only updated this if required */
|
|
rc = chgpwent(a_name->val, pwd);
|
|
if (rc == -1) {
|
|
warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
|
|
return EX_IOERR;
|
|
} else if (rc != 0) {
|
|
warn("passwd file update");
|
|
return EX_IOERR;
|
|
}
|
|
if ( cnf->nispasswd && *cnf->nispasswd=='/') {
|
|
rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
|
|
if (rc == -1)
|
|
warn("User '%s' not found in NIS passwd", pwd->pw_name);
|
|
else
|
|
warn("NIS passwd update");
|
|
/* NOTE: NIS-only update errors are not fatal */
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Ok, user is created or changed - now edit group file
|
|
*/
|
|
|
|
if (mode == M_ADD || getarg(args, 'G') != NULL)
|
|
editgroups(pwd->pw_name, cnf->groups);
|
|
|
|
/* go get a current version of pwd */
|
|
pwd = GETPWNAM(a_name->val);
|
|
if (pwd == NULL) {
|
|
/* This will fail when we rename, so special case that */
|
|
if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
|
|
a_name->val = arg->val; /* update new name */
|
|
pwd = GETPWNAM(a_name->val); /* refetch renamed rec */
|
|
}
|
|
}
|
|
if (pwd == NULL) /* can't go on without this */
|
|
errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
|
|
|
|
grp = GETGRGID(pwd->pw_gid);
|
|
pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s",
|
|
pwd->pw_name, (long) pwd->pw_uid,
|
|
grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
|
|
pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
|
|
|
|
/*
|
|
* If adding, let's touch and chown the user's mail file. This is not
|
|
* strictly necessary under BSD with a 0755 maildir but it also
|
|
* doesn't hurt anything to create the empty mailfile
|
|
*/
|
|
if (mode == M_ADD) {
|
|
FILE *fp;
|
|
|
|
if (!PWALTDIR()) {
|
|
sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
|
|
close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents &
|
|
* mtime */
|
|
chown(line, pwd->pw_uid, pwd->pw_gid);
|
|
|
|
/*
|
|
* Send mail to the new user as well, if we are asked to
|
|
*/
|
|
if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
|
|
FILE *pfp = popen(_PATH_SENDMAIL " -t", "w");
|
|
|
|
if (pfp == NULL)
|
|
warn("sendmail");
|
|
else {
|
|
fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
|
|
while (fgets(line, sizeof(line), fp) != NULL) {
|
|
/* Do substitutions? */
|
|
fputs(line, pfp);
|
|
}
|
|
pclose(pfp);
|
|
pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
|
|
pwd->pw_name, (long) pwd->pw_uid);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finally, let's create and populate the user's home directory. Note
|
|
* that this also `works' for editing users if -m is used, but
|
|
* existing files will *not* be overwritten.
|
|
*/
|
|
if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
|
|
copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid);
|
|
pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
|
|
pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
|
|
static uid_t
|
|
pw_uidpolicy(struct userconf * cnf, struct cargs * args)
|
|
{
|
|
struct passwd *pwd;
|
|
uid_t uid = (uid_t) - 1;
|
|
struct carg *a_uid = getarg(args, 'u');
|
|
|
|
/*
|
|
* Check the given uid, if any
|
|
*/
|
|
if (a_uid != NULL) {
|
|
uid = (uid_t) atol(a_uid->val);
|
|
|
|
if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
|
|
errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
|
|
} else {
|
|
struct bitmap bm;
|
|
|
|
/*
|
|
* We need to allocate the next available uid under one of
|
|
* two policies a) Grab the first unused uid b) Grab the
|
|
* highest possible unused uid
|
|
*/
|
|
if (cnf->min_uid >= cnf->max_uid) { /* Sanity
|
|
* claus^H^H^H^Hheck */
|
|
cnf->min_uid = 1000;
|
|
cnf->max_uid = 32000;
|
|
}
|
|
bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
|
|
|
|
/*
|
|
* Now, let's fill the bitmap from the password file
|
|
*/
|
|
SETPWENT();
|
|
while ((pwd = GETPWENT()) != NULL)
|
|
if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
|
|
bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
|
|
ENDPWENT();
|
|
|
|
/*
|
|
* Then apply the policy, with fallback to reuse if necessary
|
|
*/
|
|
if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
|
|
uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
|
|
|
|
/*
|
|
* Another sanity check
|
|
*/
|
|
if (uid < cnf->min_uid || uid > cnf->max_uid)
|
|
errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
|
|
bm_dealloc(&bm);
|
|
}
|
|
return uid;
|
|
}
|
|
|
|
|
|
static uid_t
|
|
pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
|
|
{
|
|
struct group *grp;
|
|
gid_t gid = (uid_t) - 1;
|
|
struct carg *a_gid = getarg(args, 'g');
|
|
|
|
/*
|
|
* If no arg given, see if default can help out
|
|
*/
|
|
if (a_gid == NULL && cnf->default_group && *cnf->default_group)
|
|
a_gid = addarg(args, 'g', cnf->default_group);
|
|
|
|
/*
|
|
* Check the given gid, if any
|
|
*/
|
|
SETGRENT();
|
|
if (a_gid != NULL) {
|
|
if ((grp = GETGRNAM(a_gid->val)) == NULL) {
|
|
gid = (gid_t) atol(a_gid->val);
|
|
if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
|
|
errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
|
|
}
|
|
gid = grp->gr_gid;
|
|
} else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
|
|
gid = grp->gr_gid; /* Already created? Use it anyway... */
|
|
} else {
|
|
struct cargs grpargs;
|
|
char tmp[32];
|
|
|
|
LIST_INIT(&grpargs);
|
|
addarg(&grpargs, 'n', nam);
|
|
|
|
/*
|
|
* We need to auto-create a group with the user's name. We
|
|
* can send all the appropriate output to our sister routine
|
|
* bit first see if we can create a group with gid==uid so we
|
|
* can keep the user and group ids in sync. We purposely do
|
|
* NOT check the gid range if we can force the sync. If the
|
|
* user's name dups an existing group, then the group add
|
|
* function will happily handle that case for us and exit.
|
|
*/
|
|
if (GETGRGID(prefer) == NULL) {
|
|
sprintf(tmp, "%lu", (unsigned long) prefer);
|
|
addarg(&grpargs, 'g', tmp);
|
|
}
|
|
if (getarg(args, 'N'))
|
|
{
|
|
addarg(&grpargs, 'N', NULL);
|
|
addarg(&grpargs, 'q', NULL);
|
|
gid = pw_group(cnf, M_NEXT, &grpargs);
|
|
}
|
|
else
|
|
{
|
|
pw_group(cnf, M_ADD, &grpargs);
|
|
if ((grp = GETGRNAM(nam)) != NULL)
|
|
gid = grp->gr_gid;
|
|
}
|
|
a_gid = LIST_FIRST(&grpargs);
|
|
while (a_gid != NULL) {
|
|
struct carg *t = LIST_NEXT(a_gid, list);
|
|
LIST_REMOVE(a_gid, list);
|
|
a_gid = t;
|
|
}
|
|
}
|
|
ENDGRENT();
|
|
return gid;
|
|
}
|
|
|
|
|
|
static time_t
|
|
pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
|
|
{
|
|
time_t result = 0;
|
|
time_t now = time(NULL);
|
|
struct carg *arg = getarg(args, 'p');
|
|
|
|
if (arg != NULL) {
|
|
if ((result = parse_date(now, arg->val)) == now)
|
|
errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
|
|
} else if (cnf->password_days > 0)
|
|
result = now + ((long) cnf->password_days * 86400L);
|
|
return result;
|
|
}
|
|
|
|
|
|
static time_t
|
|
pw_exppolicy(struct userconf * cnf, struct cargs * args)
|
|
{
|
|
time_t result = 0;
|
|
time_t now = time(NULL);
|
|
struct carg *arg = getarg(args, 'e');
|
|
|
|
if (arg != NULL) {
|
|
if ((result = parse_date(now, arg->val)) == now)
|
|
errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
|
|
} else if (cnf->expire_days > 0)
|
|
result = now + ((long) cnf->expire_days * 86400L);
|
|
return result;
|
|
}
|
|
|
|
|
|
static char *
|
|
pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
|
|
{
|
|
struct carg *arg = getarg(args, 'd');
|
|
|
|
if (arg)
|
|
return arg->val;
|
|
else {
|
|
static char home[128];
|
|
|
|
if (cnf->home == NULL || *cnf->home == '\0')
|
|
errx(EX_CONFIG, "no base home directory set");
|
|
sprintf(home, "%s/%s", cnf->home, user);
|
|
return home;
|
|
}
|
|
}
|
|
|
|
static char *
|
|
shell_path(char const * path, char *shells[], char *sh)
|
|
{
|
|
if (sh != NULL && (*sh == '/' || *sh == '\0'))
|
|
return sh; /* specified full path or forced none */
|
|
else {
|
|
char *p;
|
|
char paths[_UC_MAXLINE];
|
|
|
|
/*
|
|
* We need to search paths
|
|
*/
|
|
strncpy(paths, path, sizeof paths);
|
|
paths[sizeof paths - 1] = '\0';
|
|
for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
|
|
int i;
|
|
static char shellpath[256];
|
|
|
|
if (sh != NULL) {
|
|
sprintf(shellpath, "%s/%s", p, sh);
|
|
if (access(shellpath, X_OK) == 0)
|
|
return shellpath;
|
|
} else
|
|
for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
|
|
sprintf(shellpath, "%s/%s", p, shells[i]);
|
|
if (access(shellpath, X_OK) == 0)
|
|
return shellpath;
|
|
}
|
|
}
|
|
if (sh == NULL)
|
|
errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
|
|
errx(EX_CONFIG, "no default shell available or defined");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static char *
|
|
pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
|
|
{
|
|
char *sh = newshell;
|
|
struct carg *arg = getarg(args, 's');
|
|
|
|
if (newshell == NULL && arg != NULL)
|
|
sh = arg->val;
|
|
return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
|
|
}
|
|
|
|
static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.";
|
|
|
|
char *
|
|
pw_pwcrypt(char *password)
|
|
{
|
|
int i;
|
|
char salt[12];
|
|
|
|
static char buf[256];
|
|
|
|
/*
|
|
* Calculate a salt value
|
|
*/
|
|
if (!randinit) {
|
|
randinit = 1;
|
|
#ifdef __FreeBSD__
|
|
srandomdev();
|
|
#else
|
|
srandom((unsigned long) (time(NULL) ^ getpid()));
|
|
#endif
|
|
}
|
|
for (i = 0; i < 8; i++)
|
|
salt[i] = chars[random() % 63];
|
|
salt[i] = '\0';
|
|
|
|
return strcpy(buf, crypt(password, salt));
|
|
}
|
|
|
|
#if defined(USE_MD5RAND)
|
|
u_char *
|
|
pw_getrand(u_char *buf, int len) /* cryptographically secure rng */
|
|
{
|
|
int i;
|
|
for (i=0;i<len;i+=16) {
|
|
u_char ubuf[16];
|
|
|
|
MD5_CTX md5_ctx;
|
|
struct timeval tv, tvo;
|
|
struct rusage ru;
|
|
int n=0;
|
|
int t;
|
|
|
|
MD5Init (&md5_ctx);
|
|
t=getpid();
|
|
MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
|
|
t=getppid();
|
|
MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
|
|
gettimeofday (&tvo, NULL);
|
|
do {
|
|
getrusage (RUSAGE_SELF, &ru);
|
|
MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru);
|
|
gettimeofday (&tv, NULL);
|
|
MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv);
|
|
} while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000);
|
|
MD5Final (ubuf, &md5_ctx);
|
|
memcpy(buf+i, ubuf, MIN(16, len-n));
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
#else /* Portable version */
|
|
|
|
static u_char *
|
|
pw_getrand(u_char *buf, int len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
unsigned long val = random();
|
|
/* Use all bits in the random value */
|
|
buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val);
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
#endif
|
|
|
|
static char *
|
|
pw_password(struct userconf * cnf, struct cargs * args, char const * user)
|
|
{
|
|
int i, l;
|
|
char pwbuf[32];
|
|
u_char rndbuf[sizeof pwbuf];
|
|
|
|
switch (cnf->default_password) {
|
|
case -1: /* Random password */
|
|
if (!randinit) {
|
|
randinit = 1;
|
|
#ifdef __FreeBSD__
|
|
srandomdev();
|
|
#else
|
|
srandom((unsigned long) (time(NULL) ^ getpid()));
|
|
#endif
|
|
}
|
|
l = (random() % 8 + 8); /* 8 - 16 chars */
|
|
pw_getrand(rndbuf, l);
|
|
for (i = 0; i < l; i++)
|
|
pwbuf[i] = chars[rndbuf[i] % (sizeof(chars)-1)];
|
|
pwbuf[i] = '\0';
|
|
|
|
/*
|
|
* We give this information back to the user
|
|
*/
|
|
if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) {
|
|
if (isatty(STDOUT_FILENO))
|
|
printf("Password for '%s' is: ", user);
|
|
printf("%s\n", pwbuf);
|
|
fflush(stdout);
|
|
}
|
|
break;
|
|
|
|
case -2: /* No password at all! */
|
|
return "";
|
|
|
|
case 0: /* No login - default */
|
|
default:
|
|
return "*";
|
|
|
|
case 1: /* user's name */
|
|
strncpy(pwbuf, user, sizeof pwbuf);
|
|
pwbuf[sizeof pwbuf - 1] = '\0';
|
|
break;
|
|
}
|
|
return pw_pwcrypt(pwbuf);
|
|
}
|
|
|
|
|
|
static int
|
|
print_user(struct passwd * pwd, int pretty, int v7)
|
|
{
|
|
if (!pretty) {
|
|
char buf[_UC_MAXLINE];
|
|
|
|
fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD);
|
|
fputs(buf, stdout);
|
|
} else {
|
|
int j;
|
|
char *p;
|
|
struct group *grp = GETGRGID(pwd->pw_gid);
|
|
char uname[60] = "User &", office[60] = "[None]",
|
|
wphone[60] = "[None]", hphone[60] = "[None]";
|
|
char acexpire[32] = "[None]", pwexpire[32] = "[None]";
|
|
struct tm * tptr;
|
|
|
|
if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
|
|
strncpy(uname, p, sizeof uname);
|
|
uname[sizeof uname - 1] = '\0';
|
|
if ((p = strtok(NULL, ",")) != NULL) {
|
|
strncpy(office, p, sizeof office);
|
|
office[sizeof office - 1] = '\0';
|
|
if ((p = strtok(NULL, ",")) != NULL) {
|
|
strncpy(wphone, p, sizeof wphone);
|
|
wphone[sizeof wphone - 1] = '\0';
|
|
if ((p = strtok(NULL, "")) != NULL) {
|
|
strncpy(hphone, p, sizeof hphone);
|
|
hphone[sizeof hphone - 1] = '\0';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Handle '&' in gecos field
|
|
*/
|
|
if ((p = strchr(uname, '&')) != NULL) {
|
|
int l = strlen(pwd->pw_name);
|
|
int m = strlen(p);
|
|
|
|
memmove(p + l, p + 1, m);
|
|
memmove(p, pwd->pw_name, l);
|
|
*p = (char) toupper((unsigned char)*p);
|
|
}
|
|
if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
|
|
strftime(acexpire, sizeof acexpire, "%a %Ef %Y %X", tptr);
|
|
if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
|
|
strftime(pwexpire, sizeof pwexpire, "%a %Ef %Y %X", tptr);
|
|
printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n"
|
|
" Full Name: %s\n"
|
|
" Home: %-26.26s Class: %s\n"
|
|
" Shell: %-26.26s Office: %s\n"
|
|
"Work Phone: %-26.26s Home Phone: %s\n"
|
|
"Acc Expire: %-26.26s Pwd Expire: %s\n",
|
|
pwd->pw_name, (long) pwd->pw_uid,
|
|
grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
|
|
uname, pwd->pw_dir, pwd->pw_class,
|
|
pwd->pw_shell, office, wphone, hphone,
|
|
acexpire, pwexpire);
|
|
SETGRENT();
|
|
j = 0;
|
|
while ((grp=GETGRENT()) != NULL)
|
|
{
|
|
int i = 0;
|
|
while (grp->gr_mem[i] != NULL)
|
|
{
|
|
if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
|
|
{
|
|
printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name);
|
|
break;
|
|
}
|
|
++i;
|
|
}
|
|
}
|
|
ENDGRENT();
|
|
printf("%s", j ? "\n" : "");
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
char *
|
|
pw_checkname(u_char *name, int gecos)
|
|
{
|
|
int l = 0;
|
|
char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\"";
|
|
|
|
while (name[l]) {
|
|
if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 ||
|
|
(!gecos && l==0 && name[l] == '-') || /* leading '-' */
|
|
(!gecos && name[l] & 0x80)) /* 8-bit */
|
|
errx(EX_DATAERR, (name[l] >= ' ' && name[l] < 127)
|
|
? "invalid character `%c' in field"
|
|
: "invalid character 0x%02x in field",
|
|
name[l]);
|
|
++l;
|
|
}
|
|
if (!gecos && l > LOGNAMESIZE)
|
|
errx(EX_DATAERR, "name too long `%s'", name);
|
|
return (char *)name;
|
|
}
|
|
|
|
|
|
static void
|
|
rmat(uid_t uid)
|
|
{
|
|
DIR *d = opendir("/var/at/jobs");
|
|
|
|
if (d != NULL) {
|
|
struct dirent *e;
|
|
|
|
while ((e = readdir(d)) != NULL) {
|
|
struct stat st;
|
|
|
|
if (strncmp(e->d_name, ".lock", 5) != 0 &&
|
|
stat(e->d_name, &st) == 0 &&
|
|
!S_ISDIR(st.st_mode) &&
|
|
st.st_uid == uid) {
|
|
char tmp[MAXPATHLEN];
|
|
|
|
sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
|
|
system(tmp);
|
|
}
|
|
}
|
|
closedir(d);
|
|
}
|
|
}
|
|
|
|
static void
|
|
rmskey(char const * name)
|
|
{
|
|
static const char etcskey[] = "/etc/skeykeys";
|
|
FILE *fp = fopen(etcskey, "r+");
|
|
|
|
if (fp != NULL) {
|
|
char tmp[1024];
|
|
off_t atofs = 0;
|
|
int length = strlen(name);
|
|
|
|
while (fgets(tmp, sizeof tmp, fp) != NULL) {
|
|
if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
|
|
if (fseek(fp, atofs, SEEK_SET) == 0) {
|
|
fwrite("#", 1, 1, fp); /* Comment username out */
|
|
}
|
|
break;
|
|
}
|
|
atofs = ftell(fp);
|
|
}
|
|
/*
|
|
* If we got an error of any sort, don't update!
|
|
*/
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|