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Diffstat (limited to 'usr.sbin/pw/pw_group.c')
-rw-r--r--usr.sbin/pw/pw_group.c728
1 files changed, 728 insertions, 0 deletions
diff --git a/usr.sbin/pw/pw_group.c b/usr.sbin/pw/pw_group.c
new file mode 100644
index 000000000000..1941c03aa2c5
--- /dev/null
+++ b/usr.sbin/pw/pw_group.c
@@ -0,0 +1,728 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * 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.
+ */
+
+#include <ctype.h>
+#include <err.h>
+#include <grp.h>
+#include <libutil.h>
+#include <paths.h>
+#include <string.h>
+#include <sysexits.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "pw.h"
+#include "bitmap.h"
+
+static struct passwd *lookup_pwent(const char *user);
+static void delete_members(struct group *grp, char *list);
+static int print_group(struct group * grp, bool pretty);
+static gid_t gr_gidpolicy(struct userconf * cnf, intmax_t id);
+
+static void
+grp_set_passwd(struct group *grp, bool update, int fd, bool precrypted)
+{
+ int b;
+ int istty;
+ struct termios t, n;
+ static char line[256];
+ char *p;
+
+ if (fd == -1)
+ return;
+
+ if (fd == '-') {
+ grp->gr_passwd = "*"; /* No access */
+ return;
+ }
+
+ if ((istty = isatty(fd))) {
+ if (tcgetattr(fd, &t) == -1)
+ istty = 0;
+ else {
+ n = t;
+ /* Disable echo */
+ n.c_lflag &= ~(ECHO);
+ tcsetattr(fd, TCSANOW, &n);
+ printf("%sassword for group %s:",
+ update ? "New p" : "P",
+ grp->gr_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_OSERR, "-h file descriptor");
+ 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",
+ conf.fd);
+ if (precrypted) {
+ if (strchr(line, ':') != 0)
+ errx(EX_DATAERR, "wrong encrypted passwrd");
+ grp->gr_passwd = line;
+ } else
+ grp->gr_passwd = pw_pwcrypt(line);
+}
+
+int
+pw_groupnext(struct userconf *cnf, bool quiet)
+{
+ gid_t next = gr_gidpolicy(cnf, -1);
+
+ if (quiet)
+ return (next);
+ printf("%ju\n", (uintmax_t)next);
+
+ return (EXIT_SUCCESS);
+}
+
+static struct group *
+getgroup(char *name, intmax_t id, bool fatal)
+{
+ struct group *grp;
+
+ if (id < 0 && name == NULL)
+ errx(EX_DATAERR, "groupname or id required");
+ grp = (name != NULL) ? GETGRNAM(name) : GETGRGID(id);
+ if (grp == NULL) {
+ if (!fatal)
+ return (NULL);
+ if (name == NULL)
+ errx(EX_DATAERR, "unknown gid `%ju'", id);
+ errx(EX_DATAERR, "unknown group `%s'", name);
+ }
+ return (grp);
+}
+
+/*
+ * Lookup a passwd entry using a name or UID.
+ */
+static struct passwd *
+lookup_pwent(const char *user)
+{
+ struct passwd *pwd;
+
+ if ((pwd = GETPWNAM(user)) == NULL &&
+ (!isdigit((unsigned char)*user) ||
+ (pwd = getpwuid((uid_t) atoi(user))) == NULL))
+ errx(EX_NOUSER, "user `%s' does not exist", user);
+
+ return (pwd);
+}
+
+
+/*
+ * Delete requested members from a group.
+ */
+static void
+delete_members(struct group *grp, char *list)
+{
+ char *p;
+ int k;
+
+ if (grp->gr_mem == NULL)
+ return;
+
+ for (p = strtok(list, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
+ for (k = 0; grp->gr_mem[k] != NULL; k++) {
+ if (strcmp(grp->gr_mem[k], p) == 0)
+ break;
+ }
+ if (grp->gr_mem[k] == NULL) /* No match */
+ continue;
+
+ for (; grp->gr_mem[k] != NULL; k++)
+ grp->gr_mem[k] = grp->gr_mem[k+1];
+ }
+}
+
+static gid_t
+gr_gidpolicy(struct userconf * cnf, intmax_t id)
+{
+ struct group *grp;
+ struct bitmap bm;
+ gid_t gid = (gid_t) - 1;
+
+ /*
+ * Check the given gid, if any
+ */
+ if (id > 0) {
+ gid = (gid_t) id;
+
+ if ((grp = GETGRGID(gid)) != NULL && conf.checkduplicate)
+ errx(EX_DATAERR, "gid `%ju' has already been allocated",
+ (uintmax_t)grp->gr_gid);
+ return (gid);
+ }
+
+ /*
+ * We need to allocate the next available gid under one of
+ * two policies a) Grab the first unused gid b) Grab the
+ * highest possible unused gid
+ */
+ if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
+ cnf->min_gid = 1000;
+ cnf->max_gid = 32000;
+ }
+ bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
+
+ /*
+ * Now, let's fill the bitmap from the password file
+ */
+ SETGRENT();
+ while ((grp = GETGRENT()) != NULL)
+ if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
+ (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
+ bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
+ ENDGRENT();
+
+ /*
+ * Then apply the policy, with fallback to reuse if necessary
+ */
+ if (cnf->reuse_gids)
+ gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
+ else {
+ gid = (gid_t) (bm_lastset(&bm) + 1);
+ if (!bm_isset(&bm, gid))
+ gid += cnf->min_gid;
+ else
+ gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
+ }
+
+ /*
+ * Another sanity check
+ */
+ if (gid < cnf->min_gid || gid > cnf->max_gid)
+ errx(EX_SOFTWARE, "unable to allocate a new gid - range fully "
+ "used");
+ bm_dealloc(&bm);
+ return (gid);
+}
+
+static int
+print_group(struct group * grp, bool pretty)
+{
+ char *buf = NULL;
+ int i;
+
+ if (pretty) {
+ printf("Group Name: %-15s #%lu\n"
+ " Members: ",
+ grp->gr_name, (long) grp->gr_gid);
+ if (grp->gr_mem != NULL) {
+ for (i = 0; grp->gr_mem[i]; i++)
+ printf("%s%s", i ? "," : "", grp->gr_mem[i]);
+ }
+ fputs("\n\n", stdout);
+ return (EXIT_SUCCESS);
+ }
+
+ buf = gr_make(grp);
+ printf("%s\n", buf);
+ free(buf);
+ return (EXIT_SUCCESS);
+}
+
+int
+pw_group_next(int argc, char **argv, char *arg1 __unused)
+{
+ struct userconf *cnf;
+ const char *cfg = NULL;
+ int ch;
+ bool quiet = false;
+
+ while ((ch = getopt(argc, argv, "C:q")) != -1) {
+ switch (ch) {
+ case 'C':
+ cfg = optarg;
+ break;
+ case 'q':
+ quiet = true;
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+ if (argc > 0)
+ usage();
+
+ if (quiet)
+ freopen(_PATH_DEVNULL, "w", stderr);
+ cnf = get_userconfig(cfg);
+ return (pw_groupnext(cnf, quiet));
+}
+
+int
+pw_group_show(int argc, char **argv, char *arg1)
+{
+ struct group *grp = NULL;
+ char *name = NULL;
+ intmax_t id = -1;
+ int ch;
+ bool all, force, quiet, pretty;
+
+ all = force = quiet = pretty = false;
+
+ struct group fakegroup = {
+ "nogroup",
+ "*",
+ -1,
+ NULL
+ };
+
+ 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:g:FPa")) != -1) {
+ switch (ch) {
+ case 'C':
+ /* ignore compatibility */
+ break;
+ case 'q':
+ quiet = true;
+ break;
+ case 'n':
+ name = optarg;
+ break;
+ case 'g':
+ id = pw_checkid(optarg, GID_MAX);
+ break;
+ case 'F':
+ force = true;
+ break;
+ case 'P':
+ pretty = true;
+ break;
+ case 'a':
+ all = true;
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+ if (argc > 0)
+ usage();
+
+ if (quiet)
+ freopen(_PATH_DEVNULL, "w", stderr);
+
+ if (all) {
+ SETGRENT();
+ while ((grp = GETGRENT()) != NULL)
+ print_group(grp, pretty);
+ ENDGRENT();
+ return (EXIT_SUCCESS);
+ }
+
+ grp = getgroup(name, id, !force);
+ if (grp == NULL)
+ grp = &fakegroup;
+
+ return (print_group(grp, pretty));
+}
+
+int
+pw_group_del(int argc, char **argv, char *arg1)
+{
+ struct userconf *cnf = NULL;
+ struct group *grp = NULL;
+ char *name;
+ const char *cfg = NULL;
+ intmax_t id = -1;
+ int ch, rc;
+ bool quiet = false;
+ bool nis = 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:g:Y")) != -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 'Y':
+ nis = true;
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+ if (argc > 0)
+ usage();
+
+ if (quiet)
+ freopen(_PATH_DEVNULL, "w", stderr);
+ grp = getgroup(name, id, true);
+ cnf = get_userconfig(cfg);
+ rc = delgrent(grp);
+ if (rc == -1)
+ err(EX_IOERR, "group '%s' not available (NIS?)", name);
+ else if (rc != 0)
+ err(EX_IOERR, "group update");
+ pw_log(cnf, M_DELETE, W_GROUP, "%s(%ju) removed", name,
+ (uintmax_t)id);
+
+ if (nis && nis_update() == 0)
+ pw_log(cnf, M_DELETE, W_GROUP, "NIS maps updated");
+
+ return (EXIT_SUCCESS);
+}
+
+bool
+grp_has_member(struct group *grp, const char *name)
+{
+ int j;
+
+ for (j = 0; grp->gr_mem != NULL && grp->gr_mem[j] != NULL; j++)
+ if (strcmp(grp->gr_mem[j], name) == 0)
+ return (true);
+ return (false);
+}
+
+static void
+grp_add_members(struct group **grp, char *members)
+{
+ struct passwd *pwd;
+ char *p;
+ char tok[] = ", \t";
+
+ if (members == NULL)
+ return;
+ for (p = strtok(members, tok); p != NULL; p = strtok(NULL, tok)) {
+ pwd = lookup_pwent(p);
+ if (grp_has_member(*grp, pwd->pw_name))
+ continue;
+ *grp = gr_add(*grp, pwd->pw_name);
+ }
+}
+
+int
+groupadd(struct userconf *cnf, char *name, gid_t id, char *members, int fd,
+ bool dryrun, bool pretty, bool precrypted)
+{
+ struct group *grp;
+ int rc;
+
+ struct group fakegroup = {
+ "nogroup",
+ "*",
+ -1,
+ NULL
+ };
+
+ grp = &fakegroup;
+ grp->gr_name = pw_checkname(name, 0);
+ grp->gr_passwd = "*";
+ grp->gr_gid = gr_gidpolicy(cnf, id);
+ grp->gr_mem = NULL;
+
+ /*
+ * This allows us to set a group password Group passwords is an
+ * antique idea, rarely used and insecure (no secure database) Should
+ * be discouraged, but it is apparently still supported by some
+ * software.
+ */
+ grp_set_passwd(grp, false, fd, precrypted);
+ grp_add_members(&grp, members);
+ if (dryrun)
+ return (print_group(grp, pretty));
+
+ if ((rc = addgrent(grp)) != 0) {
+ if (rc == -1)
+ errx(EX_IOERR, "group '%s' already exists",
+ grp->gr_name);
+ else
+ err(EX_IOERR, "group update");
+ }
+
+ pw_log(cnf, M_ADD, W_GROUP, "%s(%ju)", grp->gr_name,
+ (uintmax_t)grp->gr_gid);
+
+ return (EXIT_SUCCESS);
+}
+
+int
+pw_group_add(int argc, char **argv, char *arg1)
+{
+ struct userconf *cnf = NULL;
+ char *name = NULL;
+ char *members = NULL;
+ const char *cfg = NULL;
+ intmax_t id = -1;
+ int ch, rc, fd = -1;
+ bool quiet, precrypted, dryrun, pretty, nis;
+
+ quiet = precrypted = dryrun = pretty = nis = 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:g:h:H:M:oNPY")) != -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 '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 'o':
+ conf.checkduplicate = false;
+ break;
+ case 'N':
+ dryrun = true;
+ break;
+ case 'P':
+ pretty = true;
+ break;
+ case 'Y':
+ nis = true;
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+ if (argc > 0)
+ 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:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+ if (argc > 0)
+ 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_MODIFY, W_GROUP, "%s(%ju)", grp->gr_name,
+ (uintmax_t)grp->gr_gid);
+
+ if (nis && nis_update() == 0)
+ pw_log(cnf, M_MODIFY, W_GROUP, "NIS maps updated");
+
+ return (EXIT_SUCCESS);
+}
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