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freebsd-dev/usr.sbin/pw/pw_user.c
David Bright 32bd1c2bb3 Allow the "@" and "!" characters in passwd file GECOS fields. 
Two PRs (152084 & 210187) request allowing the "@" and/or "!"
characters in the passwd file GECOS field. The man page for pw does
not mention that those characters are disallowed, Linux supports those
characters in this field, and the "@" character in particular would be
useful for storing email addresses in that field.

PR:		152084, 210187
Submitted by:	jschauma@netmeister.org, Dave Cottlehuber <dch@freebsd.org>
Reported by:	jschauma@netmeister.org, Dave Cottlehuber <dch@freebsd.org>
Reviewed by:	delphij (secteam), vangyzen
MFC after:	1 week
Sponsored by:	Dell EMC
Differential Revision:	https://reviews.freebsd.org/D14519
2018-03-01 17:47:28 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 1996
* David L. Nugent. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <pwd.h>
#include <libutil.h>
#include <login_cap.h>
#include <paths.h>
#include <string.h>
#include <sysexits.h>
#include <termios.h>
#include <unistd.h>
#include "pw.h"
#include "bitmap.h"
#include "psdate.h"
#define LOGNAMESIZE (MAXLOGNAME-1)
static char locked_str[] = "*LOCKED*";
static struct passwd fakeuser = {
"nouser",
"*",
-1,
-1,
0,
"",
"User &",
"/nonexistent",
"/bin/sh",
0,
0
};
static int print_user(struct passwd *pwd, bool pretty, bool v7);
static uid_t pw_uidpolicy(struct userconf *cnf, intmax_t id);
static uid_t pw_gidpolicy(struct userconf *cnf, char *grname, char *nam,
gid_t prefer, bool dryrun);
static char *pw_homepolicy(struct userconf * cnf, char *homedir,
const char *user);
static char *pw_shellpolicy(struct userconf * cnf);
static char *pw_password(struct userconf * cnf, char const * user,
bool dryrun);
static char *shell_path(char const * path, char *shells[], char *sh);
static void rmat(uid_t uid);
static void rmopie(char const * name);
static void
mkdir_home_parents(int dfd, const char *dir)
{
struct stat st;
char *dirs, *tmp;
if (*dir != '/')
errx(EX_DATAERR, "invalid base directory for home '%s'", dir);
dir++;
if (fstatat(dfd, dir, &st, 0) != -1) {
if (S_ISDIR(st.st_mode))
return;
errx(EX_OSFILE, "root home `/%s' is not a directory", dir);
}
dirs = strdup(dir);
if (dirs == NULL)
errx(EX_UNAVAILABLE, "out of memory");
tmp = strrchr(dirs, '/');
if (tmp == NULL) {
free(dirs);
return;
}
tmp[0] = '\0';
/*
* This is a kludge especially for Joerg :)
* If the home directory would be created in the root partition, then
* we really create it under /usr which is likely to have more space.
* But we create a symlink from cnf->home -> "/usr" -> cnf->home
*/
if (strchr(dirs, '/') == NULL) {
asprintf(&tmp, "usr/%s", dirs);
if (tmp == NULL)
errx(EX_UNAVAILABLE, "out of memory");
if (mkdirat(dfd, tmp, _DEF_DIRMODE) != -1 || errno == EEXIST) {
fchownat(dfd, tmp, 0, 0, 0);
symlinkat(tmp, dfd, dirs);
}
free(tmp);
}
tmp = dirs;
if (fstatat(dfd, dirs, &st, 0) == -1) {
while ((tmp = strchr(tmp + 1, '/')) != NULL) {
*tmp = '\0';
if (fstatat(dfd, dirs, &st, 0) == -1) {
if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
err(EX_OSFILE, "'%s' (root home parent) is not a directory", dirs);
}
*tmp = '/';
}
}
if (fstatat(dfd, dirs, &st, 0) == -1) {
if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
err(EX_OSFILE, "'%s' (root home parent) is not a directory", dirs);
fchownat(dfd, dirs, 0, 0, 0);
}
free(dirs);
}
static void
create_and_populate_homedir(struct userconf *cnf, struct passwd *pwd,
const char *skeldir, mode_t homemode, bool update)
{
int skelfd = -1;
/* Create home parents directories */
mkdir_home_parents(conf.rootfd, pwd->pw_dir);
if (skeldir != NULL && *skeldir != '\0') {
if (*skeldir == '/')
skeldir++;
skelfd = openat(conf.rootfd, skeldir, O_DIRECTORY|O_CLOEXEC);
}
copymkdir(conf.rootfd, pwd->pw_dir, skelfd, homemode, pwd->pw_uid,
pwd->pw_gid, 0);
pw_log(cnf, update ? M_UPDATE : M_ADD, W_USER, "%s(%ju) home %s made",
pwd->pw_name, (uintmax_t)pwd->pw_uid, pwd->pw_dir);
}
static int
pw_set_passwd(struct passwd *pwd, int fd, bool precrypted, bool update)
{
int b, istty;
struct termios t, n;
login_cap_t *lc;
char line[_PASSWORD_LEN+1];
char *p;
if (fd == '-') {
if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
pwd->pw_passwd = "*"; /* No access */
return (1);
}
return (0);
}
if ((istty = isatty(fd))) {
if (tcgetattr(fd, &t) == -1)
istty = 0;
else {
n = t;
n.c_lflag &= ~(ECHO);
tcsetattr(fd, TCSANOW, &n);
printf("%s%spassword for user %s:",
update ? "new " : "",
precrypted ? "encrypted " : "",
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)
err(EX_IOERR, "-%c file descriptor",
precrypted ? 'H' : 'h');
line[b] = '\0';
if ((p = strpbrk(line, "\r\n")) != NULL)
*p = '\0';
if (!*line)
errx(EX_DATAERR, "empty password read on file descriptor %d",
fd);
if (precrypted) {
if (strchr(line, ':') != NULL)
errx(EX_DATAERR, "bad encrypted password");
pwd->pw_passwd = strdup(line);
} else {
lc = login_getpwclass(pwd);
if (lc == NULL ||
login_setcryptfmt(lc, "sha512", NULL) == NULL)
warn("setting crypt(3) format");
login_close(lc);
pwd->pw_passwd = pw_pwcrypt(line);
}
return (1);
}
static void
perform_chgpwent(const char *name, struct passwd *pwd, char *nispasswd)
{
int rc;
struct passwd *nispwd;
/* duplicate for nis so that chgpwent is not modifying before NIS */
if (nispasswd && *nispasswd == '/')
nispwd = pw_dup(pwd);
rc = chgpwent(name, pwd);
if (rc == -1)
errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name);
else if (rc != 0)
err(EX_IOERR, "passwd file update");
if (nispasswd && *nispasswd == '/') {
rc = chgnispwent(nispasswd, name, nispwd);
if (rc == -1)
warn("User '%s' not found in NIS passwd", pwd->pw_name);
else if (rc != 0)
warn("NIS passwd update");
/* NOTE: NIS-only update errors are not fatal */
}
}
/*
* The M_LOCK and M_UNLOCK functions simply add or remove
* a "*LOCKED*" prefix from in front of the password to
* prevent it decoding correctly, and therefore prevents
* access. Of course, this only prevents access via
* password authentication (not ssh, kerberos or any
* other method that does not use the UNIX password) but
* that is a known limitation.
*/
static int
pw_userlock(char *arg1, int mode)
{
struct passwd *pwd = NULL;
char *passtmp = NULL;
char *name;
bool locked = false;
uid_t id = (uid_t)-1;
if (geteuid() != 0)
errx(EX_NOPERM, "you must be root");
if (arg1 == NULL)
errx(EX_DATAERR, "username or id required");
name = arg1;
if (arg1[strspn(name, "0123456789")] == '\0')
id = pw_checkid(name, UID_MAX);
pwd = GETPWNAM(pw_checkname(name, 0));
if (pwd == NULL && id != (uid_t)-1) {
pwd = GETPWUID(id);
if (pwd != NULL)
name = pwd->pw_name;
}
if (pwd == NULL) {
if (id == (uid_t)-1)
errx(EX_NOUSER, "no such name or uid `%ju'", (uintmax_t) id);
errx(EX_NOUSER, "no such user `%s'", name);
}
if (name == NULL)
name = pwd->pw_name;
if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str) -1) == 0)
locked = true;
if (mode == M_LOCK && locked)
errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
if (mode == M_UNLOCK && !locked)
errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
if (mode == M_LOCK) {
asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd);
if (passtmp == NULL) /* disaster */
errx(EX_UNAVAILABLE, "out of memory");
pwd->pw_passwd = passtmp;
} else {
pwd->pw_passwd += sizeof(locked_str)-1;
}
perform_chgpwent(name, pwd, NULL);
free(passtmp);
return (EXIT_SUCCESS);
}
static uid_t
pw_uidpolicy(struct userconf * cnf, intmax_t id)
{
struct passwd *pwd;
struct bitmap bm;
uid_t uid = (uid_t) - 1;
/*
* Check the given uid, if any
*/
if (id >= 0) {
uid = (uid_t) id;
if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate)
errx(EX_DATAERR, "uid `%ju' has already been allocated",
(uintmax_t)pwd->pw_uid);
return (uid);
}
/*
* 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, char *grname, char *nam, gid_t prefer, bool dryrun)
{
struct group *grp;
gid_t gid = (uid_t) - 1;
/*
* Check the given gid, if any
*/
SETGRENT();
if (grname) {
if ((grp = GETGRNAM(grname)) == NULL) {
gid = pw_checkid(grname, GID_MAX);
grp = GETGRGID(gid);
}
gid = grp->gr_gid;
} else if ((grp = GETGRNAM(nam)) != NULL &&
(grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) {
gid = grp->gr_gid; /* Already created? Use it anyway... */
} else {
intmax_t grid = -1;
/*
* 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)
grid = prefer;
if (dryrun) {
gid = pw_groupnext(cnf, true);
} else {
if (grid == -1)
grid = pw_groupnext(cnf, true);
groupadd(cnf, nam, grid, NULL, -1, false, false, false);
if ((grp = GETGRNAM(nam)) != NULL)
gid = grp->gr_gid;
}
}
ENDGRENT();
return (gid);
}
static char *
pw_homepolicy(struct userconf * cnf, char *homedir, const char *user)
{
static char home[128];
if (homedir)
return (homedir);
if (cnf->home == NULL || *cnf->home == '\0')
errx(EX_CONFIG, "no base home directory set");
snprintf(home, sizeof(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
*/
strlcpy(paths, path, sizeof(paths));
for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
int i;
static char shellpath[256];
if (sh != NULL) {
snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh);
if (access(shellpath, X_OK) == 0)
return shellpath;
} else
for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
snprintf(shellpath, sizeof(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)
{
return shell_path(cnf->shelldir, cnf->shells, cnf->shell_default);
}
#define SALTSIZE 32
static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
char *
pw_pwcrypt(char *password)
{
int i;
char salt[SALTSIZE + 1];
char *cryptpw;
static char buf[256];
size_t pwlen;
/*
* Calculate a salt value
*/
for (i = 0; i < SALTSIZE; i++)
salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
salt[SALTSIZE] = '\0';
cryptpw = crypt(password, salt);
if (cryptpw == NULL)
errx(EX_CONFIG, "crypt(3) failure");
pwlen = strlcpy(buf, cryptpw, sizeof(buf));
assert(pwlen < sizeof(buf));
return (buf);
}
static char *
pw_password(struct userconf * cnf, char const * user, bool dryrun)
{
int i, l;
char pwbuf[32];
switch (cnf->default_password) {
case P_NONE: /* No password at all! */
return "";
case P_RANDOM: /* Random password */
l = (arc4random() % 8 + 8); /* 8 - 16 chars */
for (i = 0; i < l; i++)
pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
pwbuf[i] = '\0';
/*
* We give this information back to the user
*/
if (conf.fd == -1 && !dryrun) {
if (isatty(STDOUT_FILENO))
printf("Password for '%s' is: ", user);
printf("%s\n", pwbuf);
fflush(stdout);
}
break;
case P_YES: /* user's name */
strlcpy(pwbuf, user, sizeof(pwbuf));
break;
case P_NO: /* No login - default */
/* FALLTHROUGH */
default:
return "*";
}
return pw_pwcrypt(pwbuf);
}
static int
print_user(struct passwd * pwd, bool pretty, bool v7)
{
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 (!pretty) {
p = v7 ? pw_make_v7(pwd) : pw_make(pwd);
printf("%s\n", p);
free(p);
return (EXIT_SUCCESS);
}
if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
strlcpy(uname, p, sizeof(uname));
if ((p = strtok(NULL, ",")) != NULL) {
strlcpy(office, p, sizeof(office));
if ((p = strtok(NULL, ",")) != NULL) {
strlcpy(wphone, p, sizeof(wphone));
if ((p = strtok(NULL, "")) != NULL) {
strlcpy(hphone, p, sizeof(hphone));
}
}
}
}
/*
* 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, "%c", tptr);
if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
strftime(pwexpire, sizeof pwexpire, "%c", tptr);
printf("Login Name: %-15s #%-12ju Group: %-15s #%ju\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, (uintmax_t)pwd->pw_uid,
grp ? grp->gr_name : "(invalid)", (uintmax_t)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;
if (grp->gr_mem != NULL) {
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(char *name, int gecos)
{
char showch[8];
const char *badchars, *ch, *showtype;
int reject;
ch = name;
reject = 0;
if (gecos) {
/* See if the name is valid as a gecos (comment) field. */
badchars = ":";
showtype = "gecos field";
} else {
/* See if the name is valid as a userid or group. */
badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
showtype = "userid/group name";
/* Userids and groups can not have a leading '-'. */
if (*ch == '-')
reject = 1;
}
if (!reject) {
while (*ch) {
if (strchr(badchars, *ch) != NULL ||
(!gecos && *ch < ' ') ||
*ch == 127) {
reject = 1;
break;
}
/* 8-bit characters are only allowed in GECOS fields */
if (!gecos && (*ch & 0x80)) {
reject = 1;
break;
}
ch++;
}
}
/*
* A `$' is allowed as the final character for userids and groups,
* mainly for the benefit of samba.
*/
if (reject && !gecos) {
if (*ch == '$' && *(ch + 1) == '\0') {
reject = 0;
ch++;
}
}
if (reject) {
snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
? "`%c'" : "0x%02x", *ch);
errx(EX_DATAERR, "invalid character %s at position %td in %s",
showch, (ch - name), showtype);
}
if (!gecos && (ch - name) > LOGNAMESIZE)
errx(EX_USAGE, "name too long `%s' (max is %d)", name,
LOGNAMESIZE);
return (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];
snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s",
e->d_name);
system(tmp);
}
}
closedir(d);
}
}
static void
rmopie(char const * name)
{
char tmp[1014];
FILE *fp;
int fd;
size_t len;
off_t atofs = 0;
if ((fd = openat(conf.rootfd, "etc/opiekeys", O_RDWR)) == -1)
return;
fp = fdopen(fd, "r+");
len = strlen(name);
while (fgets(tmp, sizeof(tmp), fp) != NULL) {
if (strncmp(name, tmp, len) == 0 && tmp[len]==' ') {
/* Comment username out */
if (fseek(fp, atofs, SEEK_SET) == 0)
fwrite("#", 1, 1, fp);
break;
}
atofs = ftell(fp);
}
/*
* If we got an error of any sort, don't update!
*/
fclose(fp);
}
int
pw_user_next(int argc, char **argv, char *name __unused)
{
struct userconf *cnf = NULL;
const char *cfg = NULL;
int ch;
bool quiet = false;
uid_t next;
while ((ch = getopt(argc, argv, "C:q")) != -1) {
switch (ch) {
case 'C':
cfg = optarg;
break;
case 'q':
quiet = true;
break;
}
}
if (quiet)
freopen(_PATH_DEVNULL, "w", stderr);
cnf = get_userconfig(cfg);
next = pw_uidpolicy(cnf, -1);
printf("%ju:", (uintmax_t)next);
pw_groupnext(cnf, quiet);
return (EXIT_SUCCESS);
}
int
pw_user_show(int argc, char **argv, char *arg1)
{
struct passwd *pwd = NULL;
char *name = NULL;
intmax_t id = -1;
int ch;
bool all = false;
bool pretty = false;
bool force = false;
bool v7 = false;
bool quiet = false;
if (arg1 != NULL) {
if (arg1[strspn(arg1, "0123456789")] == '\0')
id = pw_checkid(arg1, UID_MAX);
else
name = arg1;
}
while ((ch = getopt(argc, argv, "C:qn:u:FPa7")) != -1) {
switch (ch) {
case 'C':
/* ignore compatibility */
break;
case 'q':
quiet = true;
break;
case 'n':
name = optarg;
break;
case 'u':
id = pw_checkid(optarg, UID_MAX);
break;
case 'F':
force = true;
break;
case 'P':
pretty = true;
break;
case 'a':
all = true;
break;
case '7':
v7 = true;
break;
}
}
if (quiet)
freopen(_PATH_DEVNULL, "w", stderr);
if (all) {
SETPWENT();
while ((pwd = GETPWENT()) != NULL)
print_user(pwd, pretty, v7);
ENDPWENT();
return (EXIT_SUCCESS);
}
if (id < 0 && name == NULL)
errx(EX_DATAERR, "username or id required");
pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
if (pwd == NULL) {
if (force) {
pwd = &fakeuser;
} else {
if (name == NULL)
errx(EX_NOUSER, "no such uid `%ju'",
(uintmax_t) id);
errx(EX_NOUSER, "no such user `%s'", name);
}
}
return (print_user(pwd, pretty, v7));
}
int
pw_user_del(int argc, char **argv, char *arg1)
{
struct userconf *cnf = NULL;
struct passwd *pwd = NULL;
struct group *gr, *grp;
char *name = NULL;
char grname[MAXLOGNAME];
char *nispasswd = NULL;
char file[MAXPATHLEN];
char home[MAXPATHLEN];
const char *cfg = NULL;
struct stat st;
intmax_t id = -1;
int ch, rc;
bool nis = false;
bool deletehome = false;
bool quiet = false;
if (arg1 != NULL) {
if (arg1[strspn(arg1, "0123456789")] == '\0')
id = pw_checkid(arg1, UID_MAX);
else
name = arg1;
}
while ((ch = getopt(argc, argv, "C:qn:u:rYy:")) != -1) {
switch (ch) {
case 'C':
cfg = optarg;
break;
case 'q':
quiet = true;
break;
case 'n':
name = optarg;
break;
case 'u':
id = pw_checkid(optarg, UID_MAX);
break;
case 'r':
deletehome = true;
break;
case 'y':
nispasswd = optarg;
break;
case 'Y':
nis = true;
break;
}
}
if (quiet)
freopen(_PATH_DEVNULL, "w", stderr);
if (id < 0 && name == NULL)
errx(EX_DATAERR, "username or id required");
cnf = get_userconfig(cfg);
if (nispasswd == NULL)
nispasswd = cnf->nispasswd;
pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
if (pwd == NULL) {
if (name == NULL)
errx(EX_NOUSER, "no such uid `%ju'", (uintmax_t) id);
errx(EX_NOUSER, "no such user `%s'", name);
}
if (PWF._altdir == PWF_REGULAR &&
((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
if (!nis && nispasswd && *nispasswd != '/')
errx(EX_NOUSER, "Cannot remove NIS user `%s'",
name);
} else {
errx(EX_NOUSER, "Cannot remove non local user `%s'",
name);
}
}
id = pwd->pw_uid;
if (name == NULL)
name = pwd->pw_name;
if (strcmp(pwd->pw_name, "root") == 0)
errx(EX_DATAERR, "cannot remove user 'root'");
/* Remove opie record from /etc/opiekeys */
if (PWALTDIR() != PWF_ALT)
rmopie(pwd->pw_name);
if (!PWALTDIR()) {
/* Remove crontabs */
snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
if (access(file, F_OK) == 0) {
snprintf(file, sizeof(file), "crontab -u %s -r",
pwd->pw_name);
system(file);
}
}
/*
* Save these for later, since contents of pwd may be
* invalidated by deletion
*/
snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
strlcpy(home, pwd->pw_dir, sizeof(home));
gr = GETGRGID(pwd->pw_gid);
if (gr != NULL)
strlcpy(grname, gr->gr_name, LOGNAMESIZE);
else
grname[0] = '\0';
rc = delpwent(pwd);
if (rc == -1)
err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
else if (rc != 0)
err(EX_IOERR, "passwd update");
if (nis && nispasswd && *nispasswd=='/') {
rc = delnispwent(nispasswd, name);
if (rc == -1)
warnx("WARNING: user '%s' does not exist in NIS passwd",
pwd->pw_name);
else if (rc != 0)
warn("WARNING: NIS passwd update");
}
grp = GETGRNAM(name);
if (grp != NULL &&
(grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
strcmp(name, grname) == 0)
delgrent(GETGRNAM(name));
SETGRENT();
while ((grp = GETGRENT()) != NULL) {
int i, j;
char group[MAXLOGNAME];
if (grp->gr_mem == NULL)
continue;
for (i = 0; grp->gr_mem[i] != NULL; i++) {
if (strcmp(grp->gr_mem[i], name) != 0)
continue;
for (j = i; grp->gr_mem[j] != NULL; j++)
grp->gr_mem[j] = grp->gr_mem[j+1];
strlcpy(group, grp->gr_name, MAXLOGNAME);
chggrent(group, grp);
}
}
ENDGRENT();
pw_log(cnf, M_DELETE, W_USER, "%s(%ju) account removed", name,
(uintmax_t)id);
/* Remove mail file */
if (PWALTDIR() != PWF_ALT)
unlinkat(conf.rootfd, file + 1, 0);
/* Remove at jobs */
if (!PWALTDIR() && getpwuid(id) == NULL)
rmat(id);
/* Remove home directory and contents */
if (PWALTDIR() != PWF_ALT && deletehome && *home == '/' &&
GETPWUID(id) == NULL &&
fstatat(conf.rootfd, home + 1, &st, 0) != -1) {
rm_r(conf.rootfd, home, id);
pw_log(cnf, M_DELETE, W_USER, "%s(%ju) home '%s' %s"
"removed", name, (uintmax_t)id, home,
fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not "
"completely ");
}
return (EXIT_SUCCESS);
}
int
pw_user_lock(int argc, char **argv, char *arg1)
{
int ch;
while ((ch = getopt(argc, argv, "Cq")) != -1) {
switch (ch) {
case 'C':
case 'q':
/* compatibility */
break;
}
}
return (pw_userlock(arg1, M_LOCK));
}
int
pw_user_unlock(int argc, char **argv, char *arg1)
{
int ch;
while ((ch = getopt(argc, argv, "Cq")) != -1) {
switch (ch) {
case 'C':
case 'q':
/* compatibility */
break;
}
}
return (pw_userlock(arg1, M_UNLOCK));
}
static struct group *
group_from_name_or_id(char *name)
{
const char *errstr = NULL;
struct group *grp;
uintmax_t id;
if ((grp = GETGRNAM(name)) == NULL) {
id = strtounum(name, 0, GID_MAX, &errstr);
if (errstr)
errx(EX_NOUSER, "group `%s' does not exist", name);
grp = GETGRGID(id);
if (grp == NULL)
errx(EX_NOUSER, "group `%s' does not exist", name);
}
return (grp);
}
static void
split_groups(StringList **groups, char *groupsstr)
{
struct group *grp;
char *p;
char tok[] = ", \t";
if (*groups == NULL)
*groups = sl_init();
for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) {
grp = group_from_name_or_id(p);
sl_add(*groups, newstr(grp->gr_name));
}
}
static void
validate_grname(struct userconf *cnf, char *group)
{
struct group *grp;
if (group == NULL || *group == '\0') {
cnf->default_group = "";
return;
}
grp = group_from_name_or_id(group);
cnf->default_group = newstr(grp->gr_name);
}
static mode_t
validate_mode(char *mode)
{
mode_t m;
void *set;
if ((set = setmode(mode)) == NULL)
errx(EX_DATAERR, "invalid directory creation mode '%s'", mode);
m = getmode(set, _DEF_DIRMODE);
free(set);
return (m);
}
static long
validate_expire(char *str, int opt)
{
if (!numerics(str))
errx(EX_DATAERR, "-%c argument must be numeric "
"when setting defaults: %s", (char)opt, str);
return strtol(str, NULL, 0);
}
static void
mix_config(struct userconf *cmdcnf, struct userconf *cfg)
{
if (cmdcnf->default_password < 0)
cmdcnf->default_password = cfg->default_password;
if (cmdcnf->reuse_uids == 0)
cmdcnf->reuse_uids = cfg->reuse_uids;
if (cmdcnf->reuse_gids == 0)
cmdcnf->reuse_gids = cfg->reuse_gids;
if (cmdcnf->nispasswd == NULL)
cmdcnf->nispasswd = cfg->nispasswd;
if (cmdcnf->dotdir == NULL)
cmdcnf->dotdir = cfg->dotdir;
if (cmdcnf->newmail == NULL)
cmdcnf->newmail = cfg->newmail;
if (cmdcnf->logfile == NULL)
cmdcnf->logfile = cfg->logfile;
if (cmdcnf->home == NULL)
cmdcnf->home = cfg->home;
if (cmdcnf->homemode == 0)
cmdcnf->homemode = cfg->homemode;
if (cmdcnf->shelldir == NULL)
cmdcnf->shelldir = cfg->shelldir;
if (cmdcnf->shells == NULL)
cmdcnf->shells = cfg->shells;
if (cmdcnf->shell_default == NULL)
cmdcnf->shell_default = cfg->shell_default;
if (cmdcnf->default_group == NULL)
cmdcnf->default_group = cfg->default_group;
if (cmdcnf->groups == NULL)
cmdcnf->groups = cfg->groups;
if (cmdcnf->default_class == NULL)
cmdcnf->default_class = cfg->default_class;
if (cmdcnf->min_uid == 0)
cmdcnf->min_uid = cfg->min_uid;
if (cmdcnf->max_uid == 0)
cmdcnf->max_uid = cfg->max_uid;
if (cmdcnf->min_gid == 0)
cmdcnf->min_gid = cfg->min_gid;
if (cmdcnf->max_gid == 0)
cmdcnf->max_gid = cfg->max_gid;
if (cmdcnf->expire_days < 0)
cmdcnf->expire_days = cfg->expire_days;
if (cmdcnf->password_days < 0)
cmdcnf->password_days = cfg->password_days;
}
int
pw_user_add(int argc, char **argv, char *arg1)
{
struct userconf *cnf, *cmdcnf;
struct passwd *pwd;
struct group *grp;
struct stat st;
char args[] = "C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y";
char line[_PASSWORD_LEN+1], path[MAXPATHLEN];
char *gecos, *homedir, *skel, *walk, *userid, *groupid, *grname;
char *default_passwd, *name, *p;
const char *cfg = NULL;
login_cap_t *lc;
FILE *pfp, *fp;
intmax_t id = -1;
time_t now;
int rc, ch, fd = -1;
size_t i;
bool dryrun, nis, pretty, quiet, createhome, precrypted, genconf;
dryrun = nis = pretty = quiet = createhome = precrypted = false;
genconf = false;
gecos = homedir = skel = userid = groupid = default_passwd = NULL;
grname = name = NULL;
if ((cmdcnf = calloc(1, sizeof(struct userconf))) == NULL)
err(EXIT_FAILURE, "calloc()");
cmdcnf->default_password = cmdcnf->expire_days = cmdcnf->password_days = -1;
now = time(NULL);
if (arg1 != NULL) {
if (arg1[strspn(arg1, "0123456789")] == '\0')
id = pw_checkid(arg1, UID_MAX);
else
name = pw_checkname(arg1, 0);
}
while ((ch = getopt(argc, argv, args)) != -1) {
switch (ch) {
case 'C':
cfg = optarg;
break;
case 'q':
quiet = true;
break;
case 'n':
name = pw_checkname(optarg, 0);
break;
case 'u':
userid = optarg;
break;
case 'c':
gecos = pw_checkname(optarg, 1);
break;
case 'd':
homedir = optarg;
break;
case 'e':
if (genconf)
cmdcnf->expire_days = validate_expire(optarg, ch);
else
cmdcnf->expire_days = parse_date(now, optarg);
break;
case 'p':
if (genconf)
cmdcnf->password_days = validate_expire(optarg, ch);
else
cmdcnf->password_days = parse_date(now, optarg);
break;
case 'g':
validate_grname(cmdcnf, optarg);
grname = optarg;
break;
case 'G':
split_groups(&cmdcnf->groups, optarg);
break;
case 'm':
createhome = true;
break;
case 'M':
cmdcnf->homemode = validate_mode(optarg);
break;
case 'k':
walk = skel = optarg;
if (*walk == '/')
walk++;
if (fstatat(conf.rootfd, walk, &st, 0) == -1)
errx(EX_OSFILE, "skeleton `%s' does not "
"exists", skel);
if (!S_ISDIR(st.st_mode))
errx(EX_OSFILE, "skeleton `%s' is not a "
"directory", skel);
cmdcnf->dotdir = skel;
break;
case 's':
cmdcnf->shell_default = optarg;
break;
case 'o':
conf.checkduplicate = false;
break;
case 'L':
cmdcnf->default_class = pw_checkname(optarg, 0);
break;
case 'i':
groupid = optarg;
break;
case 'w':
default_passwd = optarg;
break;
case 'H':
if (fd != -1)
errx(EX_USAGE, "'-h' and '-H' are mutually "
"exclusive options");
fd = pw_checkfd(optarg);
precrypted = true;
if (fd == '-')
errx(EX_USAGE, "-H expects a file descriptor");
break;
case 'h':
if (fd != -1)
errx(EX_USAGE, "'-h' and '-H' are mutually "
"exclusive options");
fd = pw_checkfd(optarg);
break;
case 'D':
genconf = true;
break;
case 'b':
cmdcnf->home = optarg;
break;
case 'N':
dryrun = true;
break;
case 'P':
pretty = true;
break;
case 'y':
cmdcnf->nispasswd = optarg;
break;
case 'Y':
nis = true;
break;
}
}
if (geteuid() != 0 && ! dryrun)
errx(EX_NOPERM, "you must be root");
if (quiet)
freopen(_PATH_DEVNULL, "w", stderr);
cnf = get_userconfig(cfg);
mix_config(cmdcnf, cnf);
if (default_passwd)
cmdcnf->default_password = passwd_val(default_passwd,
cnf->default_password);
if (genconf) {
if (name != NULL)
errx(EX_DATAERR, "can't combine `-D' with `-n name'");
if (userid != NULL) {
if ((p = strtok(userid, ", \t")) != NULL)
cmdcnf->min_uid = pw_checkid(p, UID_MAX);
if (cmdcnf->min_uid == 0)
cmdcnf->min_uid = 1000;
if ((p = strtok(NULL, " ,\t")) != NULL)
cmdcnf->max_uid = pw_checkid(p, UID_MAX);
if (cmdcnf->max_uid == 0)
cmdcnf->max_uid = 32000;
}
if (groupid != NULL) {
if ((p = strtok(groupid, ", \t")) != NULL)
cmdcnf->min_gid = pw_checkid(p, GID_MAX);
if (cmdcnf->min_gid == 0)
cmdcnf->min_gid = 1000;
if ((p = strtok(NULL, " ,\t")) != NULL)
cmdcnf->max_gid = pw_checkid(p, GID_MAX);
if (cmdcnf->max_gid == 0)
cmdcnf->max_gid = 32000;
}
if (write_userconfig(cmdcnf, cfg))
return (EXIT_SUCCESS);
err(EX_IOERR, "config update");
}
if (userid)
id = pw_checkid(userid, UID_MAX);
if (id < 0 && name == NULL)
errx(EX_DATAERR, "user name or id required");
if (name == NULL)
errx(EX_DATAERR, "login name required");
if (GETPWNAM(name) != NULL)
errx(EX_DATAERR, "login name `%s' already exists", name);
if (!grname)
grname = cmdcnf->default_group;
pwd = &fakeuser;
pwd->pw_name = name;
pwd->pw_class = cmdcnf->default_class ? cmdcnf->default_class : "";
pwd->pw_uid = pw_uidpolicy(cmdcnf, id);
pwd->pw_gid = pw_gidpolicy(cnf, grname, pwd->pw_name,
(gid_t) pwd->pw_uid, dryrun);
/* cmdcnf->password_days and cmdcnf->expire_days hold unixtime here */
if (cmdcnf->password_days > 0)
pwd->pw_change = cmdcnf->password_days;
if (cmdcnf->expire_days > 0)
pwd->pw_expire = cmdcnf->expire_days;
pwd->pw_dir = pw_homepolicy(cmdcnf, homedir, pwd->pw_name);
pwd->pw_shell = pw_shellpolicy(cmdcnf);
lc = login_getpwclass(pwd);
if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
warn("setting crypt(3) format");
login_close(lc);
pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name, dryrun);
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);
if (gecos)
pwd->pw_gecos = gecos;
if (fd != -1)
pw_set_passwd(pwd, fd, precrypted, false);
if (dryrun)
return (print_user(pwd, pretty, false));
if ((rc = addpwent(pwd)) != 0) {
if (rc == -1)
errx(EX_IOERR, "user '%s' already exists",
pwd->pw_name);
else if (rc != 0)
err(EX_IOERR, "passwd file update");
}
if (nis && cmdcnf->nispasswd && *cmdcnf->nispasswd == '/') {
printf("%s\n", cmdcnf->nispasswd);
rc = addnispwent(cmdcnf->nispasswd, pwd);
if (rc == -1)
warnx("User '%s' already exists in NIS passwd",
pwd->pw_name);
else if (rc != 0)
warn("NIS passwd update");
/* NOTE: we treat NIS-only update errors as non-fatal */
}
if (cmdcnf->groups != NULL) {
for (i = 0; i < cmdcnf->groups->sl_cur; i++) {
grp = GETGRNAM(cmdcnf->groups->sl_str[i]);
grp = gr_add(grp, pwd->pw_name);
/*
* grp can only be NULL in 2 cases:
* - the new member is already a member
* - a problem with memory occurs
* in both cases we want to skip now.
*/
if (grp == NULL)
continue;
chggrent(grp->gr_name, grp);
free(grp);
}
}
pwd = GETPWNAM(name);
if (pwd == NULL)
errx(EX_NOUSER, "user '%s' disappeared during update", name);
grp = GETGRGID(pwd->pw_gid);
pw_log(cnf, M_ADD, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
pwd->pw_name, (uintmax_t)pwd->pw_uid,
grp ? grp->gr_name : "unknown",
(uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
/*
* 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 (PWALTDIR() != PWF_ALT) {
snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR,
pwd->pw_name);
/* Preserve contents & mtime */
close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 0600));
fchownat(conf.rootfd, path + 1, pwd->pw_uid, pwd->pw_gid,
AT_SYMLINK_NOFOLLOW);
}
/*
* 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() != PWF_ALT && createhome && pwd->pw_dir &&
*pwd->pw_dir == '/' && pwd->pw_dir[1])
create_and_populate_homedir(cmdcnf, pwd, cmdcnf->dotdir,
cmdcnf->homemode, false);
if (!PWALTDIR() && cmdcnf->newmail && *cmdcnf->newmail &&
(fp = fopen(cnf->newmail, "r")) != NULL) {
if ((pfp = popen(_PATH_SENDMAIL " -t", "w")) == 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, M_ADD, W_USER, "%s(%ju) new user mail sent",
pwd->pw_name, (uintmax_t)pwd->pw_uid);
}
fclose(fp);
}
if (nis && nis_update() == 0)
pw_log(cnf, M_ADD, W_USER, "NIS maps updated");
return (EXIT_SUCCESS);
}
int
pw_user_mod(int argc, char **argv, char *arg1)
{
struct userconf *cnf;
struct passwd *pwd;
struct group *grp;
StringList *groups = NULL;
char args[] = "C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:NPYy:";
const char *cfg = NULL;
char *gecos, *homedir, *grname, *name, *newname, *walk, *skel, *shell;
char *passwd, *class, *nispasswd;
login_cap_t *lc;
struct stat st;
intmax_t id = -1;
int ch, fd = -1;
size_t i, j;
bool quiet, createhome, pretty, dryrun, nis, edited;
bool precrypted;
mode_t homemode = 0;
time_t expire_time, password_time, now;
expire_time = password_time = -1;
gecos = homedir = grname = name = newname = skel = shell =NULL;
passwd = NULL;
class = nispasswd = NULL;
quiet = createhome = pretty = dryrun = nis = precrypted = false;
edited = false;
now = time(NULL);
if (arg1 != NULL) {
if (arg1[strspn(arg1, "0123456789")] == '\0')
id = pw_checkid(arg1, UID_MAX);
else
name = arg1;
}
while ((ch = getopt(argc, argv, args)) != -1) {
switch (ch) {
case 'C':
cfg = optarg;
break;
case 'q':
quiet = true;
break;
case 'n':
name = optarg;
break;
case 'u':
id = pw_checkid(optarg, UID_MAX);
break;
case 'c':
gecos = pw_checkname(optarg, 1);
break;
case 'd':
homedir = optarg;
break;
case 'e':
expire_time = parse_date(now, optarg);
break;
case 'p':
password_time = parse_date(now, optarg);
break;
case 'g':
group_from_name_or_id(optarg);
grname = optarg;
break;
case 'G':
split_groups(&groups, optarg);
break;
case 'm':
createhome = true;
break;
case 'M':
homemode = validate_mode(optarg);
break;
case 'l':
newname = optarg;
break;
case 'k':
walk = skel = optarg;
if (*walk == '/')
walk++;
if (fstatat(conf.rootfd, walk, &st, 0) == -1)
errx(EX_OSFILE, "skeleton `%s' does not "
"exists", skel);
if (!S_ISDIR(st.st_mode))
errx(EX_OSFILE, "skeleton `%s' is not a "
"directory", skel);
break;
case 's':
shell = optarg;
break;
case 'w':
passwd = optarg;
break;
case 'L':
class = pw_checkname(optarg, 0);
break;
case 'H':
if (fd != -1)
errx(EX_USAGE, "'-h' and '-H' are mutually "
"exclusive options");
fd = pw_checkfd(optarg);
precrypted = true;
if (fd == '-')
errx(EX_USAGE, "-H expects a file descriptor");
break;
case 'h':
if (fd != -1)
errx(EX_USAGE, "'-h' and '-H' are mutually "
"exclusive options");
fd = pw_checkfd(optarg);
break;
case 'N':
dryrun = true;
break;
case 'P':
pretty = true;
break;
case 'y':
nispasswd = optarg;
break;
case 'Y':
nis = true;
break;
}
}
if (geteuid() != 0 && ! dryrun)
errx(EX_NOPERM, "you must be root");
if (quiet)
freopen(_PATH_DEVNULL, "w", stderr);
cnf = get_userconfig(cfg);
if (id < 0 && name == NULL)
errx(EX_DATAERR, "username or id required");
pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
if (pwd == NULL) {
if (name == NULL)
errx(EX_NOUSER, "no such uid `%ju'",
(uintmax_t) id);
errx(EX_NOUSER, "no such user `%s'", name);
}
if (name == NULL)
name = pwd->pw_name;
if (nis && nispasswd == NULL)
nispasswd = cnf->nispasswd;
if (PWF._altdir == PWF_REGULAR &&
((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
if (!nis && nispasswd && *nispasswd != '/')
errx(EX_NOUSER, "Cannot modify NIS user `%s'",
name);
} else {
errx(EX_NOUSER, "Cannot modify non local user `%s'",
name);
}
}
if (newname) {
if (strcmp(pwd->pw_name, "root") == 0)
errx(EX_DATAERR, "can't rename `root' account");
if (strcmp(pwd->pw_name, newname) != 0) {
pwd->pw_name = pw_checkname(newname, 0);
edited = true;
}
}
if (id >= 0 && pwd->pw_uid != id) {
pwd->pw_uid = id;
edited = true;
if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
errx(EX_DATAERR, "can't change uid of `root' account");
if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
warnx("WARNING: account `%s' will have a uid of 0 "
"(superuser access!)", pwd->pw_name);
}
if (grname && pwd->pw_uid != 0) {
grp = GETGRNAM(grname);
if (grp == NULL)
grp = GETGRGID(pw_checkid(grname, GID_MAX));
if (grp->gr_gid != pwd->pw_gid) {
pwd->pw_gid = grp->gr_gid;
edited = true;
}
}
if (password_time >= 0 && pwd->pw_change != password_time) {
pwd->pw_change = password_time;
edited = true;
}
if (expire_time >= 0 && pwd->pw_expire != expire_time) {
pwd->pw_expire = expire_time;
edited = true;
}
if (shell) {
shell = shell_path(cnf->shelldir, cnf->shells, shell);
if (shell == NULL)
shell = "";
if (strcmp(shell, pwd->pw_shell) != 0) {
pwd->pw_shell = shell;
edited = true;
}
}
if (class && strcmp(pwd->pw_class, class) != 0) {
pwd->pw_class = class;
edited = true;
}
if (homedir && strcmp(pwd->pw_dir, homedir) != 0) {
pwd->pw_dir = homedir;
edited = true;
if (fstatat(conf.rootfd, pwd->pw_dir, &st, 0) == -1) {
if (!createhome)
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 (passwd && conf.fd == -1) {
lc = login_getpwclass(pwd);
if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
warn("setting crypt(3) format");
login_close(lc);
cnf->default_password = passwd_val(passwd,
cnf->default_password);
pwd->pw_passwd = pw_password(cnf, pwd->pw_name, dryrun);
edited = true;
}
if (gecos && strcmp(pwd->pw_gecos, gecos) != 0) {
pwd->pw_gecos = gecos;
edited = true;
}
if (fd != -1)
edited = pw_set_passwd(pwd, fd, precrypted, true);
if (dryrun)
return (print_user(pwd, pretty, false));
if (edited) /* Only updated this if required */
perform_chgpwent(name, pwd, nis ? nispasswd : NULL);
/* Now perform the needed changes concern groups */
if (groups != NULL) {
/* Delete User from groups using old name */
SETGRENT();
while ((grp = GETGRENT()) != NULL) {
if (grp->gr_mem == NULL)
continue;
for (i = 0; grp->gr_mem[i] != NULL; i++) {
if (strcmp(grp->gr_mem[i] , name) != 0)
continue;
for (j = i; grp->gr_mem[j] != NULL ; j++)
grp->gr_mem[j] = grp->gr_mem[j+1];
chggrent(grp->gr_name, grp);
break;
}
}
ENDGRENT();
/* Add the user to the needed groups */
for (i = 0; i < groups->sl_cur; i++) {
grp = GETGRNAM(groups->sl_str[i]);
grp = gr_add(grp, pwd->pw_name);
if (grp == NULL)
continue;
chggrent(grp->gr_name, grp);
free(grp);
}
}
/* In case of rename we need to walk over the different groups */
if (newname) {
SETGRENT();
while ((grp = GETGRENT()) != NULL) {
if (grp->gr_mem == NULL)
continue;
for (i = 0; grp->gr_mem[i] != NULL; i++) {
if (strcmp(grp->gr_mem[i], name) != 0)
continue;
grp->gr_mem[i] = newname;
chggrent(grp->gr_name, grp);
break;
}
}
}
/* go get a current version of pwd */
if (newname)
name = newname;
pwd = GETPWNAM(name);
if (pwd == NULL)
errx(EX_NOUSER, "user '%s' disappeared during update", name);
grp = GETGRGID(pwd->pw_gid);
pw_log(cnf, M_UPDATE, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
pwd->pw_name, (uintmax_t)pwd->pw_uid,
grp ? grp->gr_name : "unknown",
(uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
/*
* 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() != PWF_ALT && createhome && pwd->pw_dir &&
*pwd->pw_dir == '/' && pwd->pw_dir[1]) {
if (!skel)
skel = cnf->dotdir;
if (homemode == 0)
homemode = cnf->homemode;
create_and_populate_homedir(cnf, pwd, skel, homemode, true);
}
if (nis && nis_update() == 0)
pw_log(cnf, M_UPDATE, W_USER, "NIS maps updated");
return (EXIT_SUCCESS);
}
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