The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
713 lines
15 KiB
C
713 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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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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#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 <grp.h>
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#include <libutil.h>
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#include <paths.h>
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#include <string.h>
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#include <sysexits.h>
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#include <termios.h>
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#include <unistd.h>
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#include "pw.h"
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#include "bitmap.h"
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static struct passwd *lookup_pwent(const char *user);
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static void delete_members(struct group *grp, char *list);
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static int print_group(struct group * grp, bool pretty);
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static gid_t gr_gidpolicy(struct userconf * cnf, intmax_t id);
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static void
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grp_set_passwd(struct group *grp, bool update, int fd, bool precrypted)
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{
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int b;
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int istty;
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struct termios t, n;
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static char line[256];
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char *p;
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if (fd == -1)
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return;
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if (fd == '-') {
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grp->gr_passwd = "*"; /* No access */
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return;
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}
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if ((istty = isatty(fd))) {
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if (tcgetattr(fd, &t) == -1)
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istty = 0;
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else {
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n = t;
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/* Disable echo */
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n.c_lflag &= ~(ECHO);
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tcsetattr(fd, TCSANOW, &n);
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printf("%sassword for group %s:",
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update ? "New p" : "P",
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grp->gr_name);
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fflush(stdout);
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}
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}
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b = read(fd, line, sizeof(line) - 1);
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if (istty) { /* Restore state */
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tcsetattr(fd, TCSANOW, &t);
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fputc('\n', stdout);
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fflush(stdout);
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}
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if (b < 0)
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err(EX_OSERR, "-h file descriptor");
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line[b] = '\0';
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if ((p = strpbrk(line, " \t\r\n")) != NULL)
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*p = '\0';
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if (!*line)
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errx(EX_DATAERR, "empty password read on file descriptor %d",
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conf.fd);
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if (precrypted) {
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if (strchr(line, ':') != 0)
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errx(EX_DATAERR, "wrong encrypted passwrd");
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grp->gr_passwd = line;
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} else
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grp->gr_passwd = pw_pwcrypt(line);
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}
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int
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pw_groupnext(struct userconf *cnf, bool quiet)
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{
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gid_t next = gr_gidpolicy(cnf, -1);
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if (quiet)
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return (next);
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printf("%ju\n", (uintmax_t)next);
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return (EXIT_SUCCESS);
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}
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static struct group *
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getgroup(char *name, intmax_t id, bool fatal)
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{
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struct group *grp;
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if (id < 0 && name == NULL)
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errx(EX_DATAERR, "groupname or id required");
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grp = (name != NULL) ? GETGRNAM(name) : GETGRGID(id);
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if (grp == NULL) {
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if (!fatal)
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return (NULL);
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if (name == NULL)
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errx(EX_DATAERR, "unknown gid `%ju'", id);
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errx(EX_DATAERR, "unknown group `%s'", name);
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}
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return (grp);
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}
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/*
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* Lookup a passwd entry using a name or UID.
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*/
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static struct passwd *
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lookup_pwent(const char *user)
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{
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struct passwd *pwd;
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if ((pwd = GETPWNAM(user)) == NULL &&
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(!isdigit((unsigned char)*user) ||
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(pwd = getpwuid((uid_t) atoi(user))) == NULL))
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errx(EX_NOUSER, "user `%s' does not exist", user);
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return (pwd);
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}
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/*
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* Delete requested members from a group.
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*/
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static void
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delete_members(struct group *grp, char *list)
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{
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char *p;
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int k;
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if (grp->gr_mem == NULL)
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return;
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for (p = strtok(list, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
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for (k = 0; grp->gr_mem[k] != NULL; k++) {
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if (strcmp(grp->gr_mem[k], p) == 0)
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break;
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}
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if (grp->gr_mem[k] == NULL) /* No match */
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continue;
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for (; grp->gr_mem[k] != NULL; k++)
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grp->gr_mem[k] = grp->gr_mem[k+1];
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}
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}
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static gid_t
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gr_gidpolicy(struct userconf * cnf, intmax_t id)
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{
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struct group *grp;
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struct bitmap bm;
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gid_t gid = (gid_t) - 1;
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/*
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* Check the given gid, if any
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*/
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if (id > 0) {
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gid = (gid_t) id;
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if ((grp = GETGRGID(gid)) != NULL && conf.checkduplicate)
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errx(EX_DATAERR, "gid `%ju' has already been allocated",
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(uintmax_t)grp->gr_gid);
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return (gid);
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}
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/*
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* We need to allocate the next available gid under one of
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* two policies a) Grab the first unused gid b) Grab the
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* highest possible unused gid
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*/
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if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
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cnf->min_gid = 1000;
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cnf->max_gid = 32000;
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}
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bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
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/*
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* Now, let's fill the bitmap from the password file
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*/
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SETGRENT();
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while ((grp = GETGRENT()) != NULL)
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if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
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(gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
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bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
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ENDGRENT();
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/*
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* Then apply the policy, with fallback to reuse if necessary
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*/
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if (cnf->reuse_gids)
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gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
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else {
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gid = (gid_t) (bm_lastset(&bm) + 1);
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if (!bm_isset(&bm, gid))
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gid += cnf->min_gid;
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else
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gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
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}
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/*
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* Another sanity check
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*/
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if (gid < cnf->min_gid || gid > cnf->max_gid)
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errx(EX_SOFTWARE, "unable to allocate a new gid - range fully "
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"used");
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bm_dealloc(&bm);
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return (gid);
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}
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static int
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print_group(struct group * grp, bool pretty)
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{
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char *buf = NULL;
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int i;
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if (pretty) {
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printf("Group Name: %-15s #%lu\n"
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" Members: ",
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grp->gr_name, (long) grp->gr_gid);
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if (grp->gr_mem != NULL) {
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for (i = 0; grp->gr_mem[i]; i++)
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printf("%s%s", i ? "," : "", grp->gr_mem[i]);
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}
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fputs("\n\n", stdout);
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return (EXIT_SUCCESS);
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}
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buf = gr_make(grp);
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printf("%s\n", buf);
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free(buf);
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return (EXIT_SUCCESS);
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}
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int
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pw_group_next(int argc, char **argv, char *arg1 __unused)
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{
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struct userconf *cnf;
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const char *cfg = NULL;
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int ch;
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bool quiet = false;
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while ((ch = getopt(argc, argv, "C:q")) != -1) {
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switch (ch) {
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case 'C':
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cfg = optarg;
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break;
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case 'q':
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quiet = true;
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break;
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default:
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exit(EX_USAGE);
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}
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}
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if (quiet)
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freopen(_PATH_DEVNULL, "w", stderr);
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cnf = get_userconfig(cfg);
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return (pw_groupnext(cnf, quiet));
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}
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int
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pw_group_show(int argc, char **argv, char *arg1)
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{
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struct group *grp = NULL;
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char *name = NULL;
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intmax_t id = -1;
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int ch;
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bool all, force, quiet, pretty;
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all = force = quiet = pretty = false;
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struct group fakegroup = {
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"nogroup",
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"*",
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-1,
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NULL
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};
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if (arg1 != NULL) {
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if (arg1[strspn(arg1, "0123456789")] == '\0')
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id = pw_checkid(arg1, GID_MAX);
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else
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name = arg1;
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}
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while ((ch = getopt(argc, argv, "C:qn:g:FPa")) != -1) {
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switch (ch) {
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case 'C':
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/* ignore compatibility */
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break;
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case 'q':
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quiet = true;
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break;
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case 'n':
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name = optarg;
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break;
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case 'g':
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id = pw_checkid(optarg, GID_MAX);
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break;
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case 'F':
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force = true;
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break;
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case 'P':
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pretty = true;
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break;
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case 'a':
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all = true;
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break;
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default:
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exit(EX_USAGE);
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}
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}
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if (quiet)
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freopen(_PATH_DEVNULL, "w", stderr);
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if (all) {
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SETGRENT();
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while ((grp = GETGRENT()) != NULL)
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print_group(grp, pretty);
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ENDGRENT();
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return (EXIT_SUCCESS);
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}
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grp = getgroup(name, id, !force);
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if (grp == NULL)
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grp = &fakegroup;
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return (print_group(grp, pretty));
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}
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int
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pw_group_del(int argc, char **argv, char *arg1)
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{
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struct userconf *cnf = NULL;
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struct group *grp = NULL;
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char *name;
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const char *cfg = NULL;
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intmax_t id = -1;
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int ch, rc;
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bool quiet = false;
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bool nis = false;
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if (arg1 != NULL) {
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if (arg1[strspn(arg1, "0123456789")] == '\0')
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id = pw_checkid(arg1, GID_MAX);
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else
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name = arg1;
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}
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while ((ch = getopt(argc, argv, "C:qn:g:Y")) != -1) {
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switch (ch) {
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case 'C':
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cfg = optarg;
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break;
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case 'q':
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quiet = true;
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break;
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case 'n':
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name = optarg;
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break;
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case 'g':
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id = pw_checkid(optarg, GID_MAX);
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break;
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case 'Y':
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nis = true;
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break;
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default:
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exit(EX_USAGE);
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}
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}
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if (quiet)
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freopen(_PATH_DEVNULL, "w", stderr);
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grp = getgroup(name, id, true);
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cnf = get_userconfig(cfg);
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rc = delgrent(grp);
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if (rc == -1)
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err(EX_IOERR, "group '%s' not available (NIS?)", name);
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else if (rc != 0)
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err(EX_IOERR, "group update");
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pw_log(cnf, M_DELETE, W_GROUP, "%s(%ju) removed", name,
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(uintmax_t)id);
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if (nis && nis_update() == 0)
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pw_log(cnf, M_DELETE, W_GROUP, "NIS maps updated");
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return (EXIT_SUCCESS);
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}
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static bool
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grp_has_member(struct group *grp, const char *name)
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{
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int j;
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for (j = 0; grp->gr_mem != NULL && grp->gr_mem[j] != NULL; j++)
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if (strcmp(grp->gr_mem[j], name) == 0)
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return (true);
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return (false);
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}
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static void
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grp_add_members(struct group **grp, char *members)
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{
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struct passwd *pwd;
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char *p;
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char tok[] = ", \t";
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if (members == NULL)
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return;
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for (p = strtok(members, tok); p != NULL; p = strtok(NULL, tok)) {
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pwd = lookup_pwent(p);
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if (grp_has_member(*grp, pwd->pw_name))
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continue;
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*grp = gr_add(*grp, pwd->pw_name);
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}
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}
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int
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groupadd(struct userconf *cnf, char *name, gid_t id, char *members, int fd,
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bool dryrun, bool pretty, bool precrypted)
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{
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struct group *grp;
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int rc;
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struct group fakegroup = {
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"nogroup",
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"*",
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-1,
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NULL
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};
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grp = &fakegroup;
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grp->gr_name = pw_checkname(name, 0);
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grp->gr_passwd = "*";
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grp->gr_gid = gr_gidpolicy(cnf, id);
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grp->gr_mem = NULL;
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/*
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* This allows us to set a group password Group passwords is an
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* antique idea, rarely used and insecure (no secure database) Should
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* be discouraged, but it is apparently still supported by some
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* software.
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*/
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grp_set_passwd(grp, false, fd, precrypted);
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grp_add_members(&grp, members);
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if (dryrun)
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return (print_group(grp, pretty));
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if ((rc = addgrent(grp)) != 0) {
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if (rc == -1)
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errx(EX_IOERR, "group '%s' already exists",
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grp->gr_name);
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else
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err(EX_IOERR, "group update");
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}
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pw_log(cnf, M_ADD, W_GROUP, "%s(%ju)", grp->gr_name,
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(uintmax_t)grp->gr_gid);
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return (EXIT_SUCCESS);
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}
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int
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pw_group_add(int argc, char **argv, char *arg1)
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{
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struct userconf *cnf = NULL;
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char *name = NULL;
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char *members = NULL;
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const char *cfg = NULL;
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intmax_t id = -1;
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int ch, rc, fd = -1;
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bool quiet, precrypted, dryrun, pretty, nis;
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quiet = precrypted = dryrun = pretty = nis = false;
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if (arg1 != NULL) {
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if (arg1[strspn(arg1, "0123456789")] == '\0')
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id = pw_checkid(arg1, GID_MAX);
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else
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name = arg1;
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}
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while ((ch = getopt(argc, argv, "C:qn:g:h:H:M:oNPY")) != -1) {
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switch (ch) {
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case 'C':
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cfg = optarg;
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break;
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case 'q':
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quiet = true;
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break;
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case 'n':
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name = optarg;
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break;
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case 'g':
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id = pw_checkid(optarg, GID_MAX);
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break;
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case 'H':
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if (fd != -1)
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errx(EX_USAGE, "'-h' and '-H' are mutually "
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"exclusive options");
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fd = pw_checkfd(optarg);
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precrypted = true;
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if (fd == '-')
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errx(EX_USAGE, "-H expects a file descriptor");
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break;
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case 'h':
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if (fd != -1)
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errx(EX_USAGE, "'-h' and '-H' are mutually "
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"exclusive options");
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fd = pw_checkfd(optarg);
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break;
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case 'M':
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members = optarg;
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break;
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case 'o':
|
|
conf.checkduplicate = false;
|
|
break;
|
|
case 'N':
|
|
dryrun = true;
|
|
break;
|
|
case 'P':
|
|
pretty = true;
|
|
break;
|
|
case 'Y':
|
|
nis = true;
|
|
break;
|
|
default:
|
|
exit(EX_USAGE);
|
|
}
|
|
}
|
|
|
|
if (quiet)
|
|
freopen(_PATH_DEVNULL, "w", stderr);
|
|
if (name == NULL)
|
|
errx(EX_DATAERR, "group name required");
|
|
if (GETGRNAM(name) != NULL)
|
|
errx(EX_DATAERR, "group name `%s' already exists", name);
|
|
cnf = get_userconfig(cfg);
|
|
rc = groupadd(cnf, name, gr_gidpolicy(cnf, id), members, fd, dryrun,
|
|
pretty, precrypted);
|
|
if (nis && rc == EXIT_SUCCESS && nis_update() == 0)
|
|
pw_log(cnf, M_ADD, W_GROUP, "NIS maps updated");
|
|
|
|
return (rc);
|
|
}
|
|
|
|
int
|
|
pw_group_mod(int argc, char **argv, char *arg1)
|
|
{
|
|
struct userconf *cnf;
|
|
struct group *grp = NULL;
|
|
const char *cfg = NULL;
|
|
char *oldmembers = NULL;
|
|
char *members = NULL;
|
|
char *newmembers = NULL;
|
|
char *newname = NULL;
|
|
char *name = NULL;
|
|
intmax_t id = -1;
|
|
int ch, rc, fd = -1;
|
|
bool quiet, pretty, dryrun, nis, precrypted;
|
|
|
|
quiet = pretty = dryrun = nis = precrypted = false;
|
|
|
|
if (arg1 != NULL) {
|
|
if (arg1[strspn(arg1, "0123456789")] == '\0')
|
|
id = pw_checkid(arg1, GID_MAX);
|
|
else
|
|
name = arg1;
|
|
}
|
|
|
|
while ((ch = getopt(argc, argv, "C:qn:d:g:l:h:H:M:m:NPY")) != -1) {
|
|
switch (ch) {
|
|
case 'C':
|
|
cfg = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 'n':
|
|
name = optarg;
|
|
break;
|
|
case 'g':
|
|
id = pw_checkid(optarg, GID_MAX);
|
|
break;
|
|
case 'd':
|
|
oldmembers = optarg;
|
|
break;
|
|
case 'l':
|
|
newname = 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 'M':
|
|
members = optarg;
|
|
break;
|
|
case 'm':
|
|
newmembers = optarg;
|
|
break;
|
|
case 'N':
|
|
dryrun = true;
|
|
break;
|
|
case 'P':
|
|
pretty = true;
|
|
break;
|
|
case 'Y':
|
|
nis = true;
|
|
break;
|
|
default:
|
|
exit(EX_USAGE);
|
|
}
|
|
}
|
|
if (quiet)
|
|
freopen(_PATH_DEVNULL, "w", stderr);
|
|
cnf = get_userconfig(cfg);
|
|
grp = getgroup(name, id, true);
|
|
if (name == NULL)
|
|
name = grp->gr_name;
|
|
if (id > 0)
|
|
grp->gr_gid = id;
|
|
|
|
if (newname != NULL)
|
|
grp->gr_name = pw_checkname(newname, 0);
|
|
|
|
grp_set_passwd(grp, true, fd, precrypted);
|
|
/*
|
|
* Keep the same logic as old code for now:
|
|
* if -M is passed, -d and -m are ignored
|
|
* then id -d, -m is ignored
|
|
* last is -m
|
|
*/
|
|
|
|
if (members) {
|
|
grp->gr_mem = NULL;
|
|
grp_add_members(&grp, members);
|
|
} else if (oldmembers) {
|
|
delete_members(grp, oldmembers);
|
|
} else if (newmembers) {
|
|
grp_add_members(&grp, newmembers);
|
|
}
|
|
|
|
if (dryrun) {
|
|
print_group(grp, pretty);
|
|
return (EXIT_SUCCESS);
|
|
}
|
|
|
|
if ((rc = chggrent(name, grp)) != 0) {
|
|
if (rc == -1)
|
|
errx(EX_IOERR, "group '%s' not available (NIS?)",
|
|
grp->gr_name);
|
|
else
|
|
err(EX_IOERR, "group update");
|
|
}
|
|
|
|
if (newname)
|
|
name = newname;
|
|
|
|
/* grp may have been invalidated */
|
|
if ((grp = GETGRNAM(name)) == NULL)
|
|
errx(EX_SOFTWARE, "group disappeared during update");
|
|
|
|
pw_log(cnf, M_UPDATE, W_GROUP, "%s(%ju)", grp->gr_name,
|
|
(uintmax_t)grp->gr_gid);
|
|
|
|
if (nis && nis_update() == 0)
|
|
pw_log(cnf, M_UPDATE, W_GROUP, "NIS maps updated");
|
|
|
|
return (EXIT_SUCCESS);
|
|
}
|