diff options
author | joerg <joerg@FreeBSD.org> | 1996-12-09 14:05:35 +0000 |
---|---|---|
committer | joerg <joerg@FreeBSD.org> | 1996-12-09 14:05:35 +0000 |
commit | 4a198ee0cbf4e9939c2a6e9a0de4afd27158e394 (patch) | |
tree | 37b8865c1723d19a004077822159237230903b82 /usr.sbin/pw/pw_group.c | |
download | FreeBSD-src-4a198ee0cbf4e9939c2a6e9a0de4afd27158e394.zip FreeBSD-src-4a198ee0cbf4e9939c2a6e9a0de4afd27158e394.tar.gz |
pw(8) -- a backend utility to manage the user and group databases.
sysinstall's new User&group menu will use it, hence it's a 2.2
candidate despite of providing new functionality.
Submitted by: David L. Nugent, <davidn@blaze.net.au>
Diffstat (limited to 'usr.sbin/pw/pw_group.c')
-rw-r--r-- | usr.sbin/pw/pw_group.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/usr.sbin/pw/pw_group.c b/usr.sbin/pw/pw_group.c new file mode 100644 index 0000000..d189ccc --- /dev/null +++ b/usr.sbin/pw/pw_group.c @@ -0,0 +1,273 @@ +/*- + * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>. + * 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 as + * the first lines of this file unmodified. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by David L. Nugent. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``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 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. + * + * $Id$ + */ + +#include <unistd.h> +#include <ctype.h> +#include <termios.h> + +#include "pw.h" +#include "bitmap.h" + + +static int print_group(struct group * grp, int pretty); +static gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args); + +int +pw_group(struct userconf * cnf, int mode, struct cargs * args) +{ + struct carg *a_name = getarg(args, 'n'); + struct carg *a_gid = getarg(args, 'g'); + struct carg *arg; + struct group *grp = NULL; + char *members[_UC_MAXGROUPS]; + + static struct group fakegroup = + { + "nogroup", + "*", + -1, + NULL + }; + + if (mode == M_PRINT && getarg(args, 'a')) { + int pretty = getarg(args, 'p') != NULL; + + setgrent(); + while ((grp = getgrent()) != NULL) + print_group(grp, pretty); + endgrent(); + return X_ALLOK; + } + if (a_gid == NULL) { + if (a_name == NULL) + cmderr(X_CMDERR, "group name or id required\n"); + + if (mode != M_ADD && grp == NULL && isdigit(*a_name->val)) { + (a_gid = a_name)->ch = 'g'; + a_name = NULL; + } + } + grp = (a_name != NULL) ? getgrnam(a_name->val) : getgrgid((gid_t) atoi(a_gid->val)); + + if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) { + if (a_name == NULL && grp == NULL) /* Try harder */ + grp = getgrgid(atoi(a_gid->val)); + + if (grp == NULL) { + if (mode == M_PRINT && getarg(args, 'F')) { + fakegroup.gr_name = a_name ? a_name->val : "nogroup"; + fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1; + return print_group(&fakegroup, getarg(args, 'p') != NULL); + } + cmderr(X_CMDERR, "unknown group `%s'\n", a_name ? a_name->val : a_gid->val); + } + if (a_name == NULL) /* Needed later */ + a_name = addarg(args, 'n', grp->gr_name); + + /* + * Handle deletions now + */ + if (mode == M_DELETE) { + gid_t gid = grp->gr_gid; + + if (delgrent(grp) == -1) + cmderr(X_NOUPDATE, "Error updating group file: %s\n", strerror(errno)); + pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid); + return X_ALLOK; + } else if (mode == M_PRINT) + return print_group(grp, getarg(args, 'p') != NULL); + + if (a_gid) + grp->gr_gid = (gid_t) atoi(a_gid->val); + + if ((arg = getarg(args, 'l')) != NULL) + grp->gr_name = arg->val; + } else { + if (a_name == NULL) /* Required */ + cmderr(X_CMDERR, "group name required\n"); + else if (grp != NULL) /* Exists */ + cmderr(X_EXISTS, "group name `%s' already exists\n", a_name->val); + + memset(members, 0, sizeof members); + grp = &fakegroup; + grp->gr_name = a_name->val; + grp->gr_passwd = "*"; + grp->gr_gid = gr_gidpolicy(cnf, args); + grp->gr_mem = members; + } + + /* + * 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. + */ + + if ((arg = getarg(args, 'h')) != NULL) { + if (strcmp(arg->val, "-") == 0) + grp->gr_passwd = "*"; /* No access */ + else { + int fd = atoi(arg->val); + int b; + int istty = isatty(fd); + struct termios t; + char *p, line[256]; + + if (istty) { + if (tcgetattr(fd, &t) == -1) + istty = 0; + else { + struct termios n = t; + + /* Disable echo */ + n.c_lflag &= ~(ECHO); + tcsetattr(fd, TCSANOW, &n); + printf("%sassword for group %s:", (mode == M_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) { + perror("-h file descriptor"); + return X_CMDERR; + } + line[b] = '\0'; + if ((p = strpbrk(line, " \t\r\n")) != NULL) + *p = '\0'; + if (!*line) + cmderr(X_CMDERR, "empty password read on file descriptor %d\n", fd); + grp->gr_passwd = pw_pwcrypt(line); + } + } + if ((mode == M_ADD && !addgrent(grp)) || (mode == M_UPDATE && !chggrent(a_name->val, grp))) { + perror("group update"); + return X_NOUPDATE; + } + /* grp may have been invalidated */ + if ((grp = getgrnam(a_name->val)) == NULL) + cmderr(X_NOTFOUND, "group disappeared during update\n"); + + pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid); + + return X_ALLOK; +} + + +static gid_t +gr_gidpolicy(struct userconf * cnf, struct cargs * args) +{ + struct group *grp; + gid_t gid = (gid_t) - 1; + struct carg *a_gid = getarg(args, 'g'); + + /* + * Check the given gid, if any + */ + if (a_gid != NULL) { + gid = (gid_t) atol(a_gid->val); + + if ((grp = getgrgid(gid)) != NULL && getarg(args, 'o') == NULL) + cmderr(X_EXISTS, "gid `%ld' has already been allocated\n", (long) grp->gr_gid); + } else { + struct bitmap bm; + + /* + * 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 (grp->gr_gid >= (int) cnf->min_gid && grp->gr_gid <= (int) 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) + cmderr(X_EXISTS, "unable to allocate a new gid - range fully used\n"); + bm_dealloc(&bm); + } + return gid; +} + + +static int +print_group(struct group * grp, int pretty) +{ + if (!pretty) { + char buf[_UC_MAXLINE]; + + fmtgrent(buf, grp); + fputs(buf, stdout); + } else { + int i; + + printf("Group Name : %-10s #%lu\n" + " Members : ", + grp->gr_name, (long) grp->gr_gid); + for (i = 0; i < _UC_MAXGROUPS && grp->gr_mem[i]; i++) + printf("%s%s", i ? "," : "", grp->gr_mem[i]); + fputs("\n\n", stdout); + } + return X_ALLOK; +} |