pw_group.c revision 50479
120253Sjoerg/*- 220302Sjoerg * Copyright (C) 1996 320302Sjoerg * David L. Nugent. All rights reserved. 420253Sjoerg * 520253Sjoerg * Redistribution and use in source and binary forms, with or without 620253Sjoerg * modification, are permitted provided that the following conditions 720253Sjoerg * are met: 820253Sjoerg * 1. Redistributions of source code must retain the above copyright 920302Sjoerg * notice, this list of conditions and the following disclaimer. 1020253Sjoerg * 2. Redistributions in binary form must reproduce the above copyright 1120253Sjoerg * notice, this list of conditions and the following disclaimer in the 1220253Sjoerg * documentation and/or other materials provided with the distribution. 1320253Sjoerg * 1420302Sjoerg * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 1520253Sjoerg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1620253Sjoerg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1720302Sjoerg * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 1820253Sjoerg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1920253Sjoerg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2020253Sjoerg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2120253Sjoerg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2220253Sjoerg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2320253Sjoerg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2420253Sjoerg * SUCH DAMAGE. 2520253Sjoerg */ 2620253Sjoerg 2730259Scharnier#ifndef lint 2830259Scharnierstatic const char rcsid[] = 2950479Speter "$FreeBSD: head/usr.sbin/pw/pw_group.c 50479 1999-08-28 01:35:59Z peter $"; 3030259Scharnier#endif /* not lint */ 3130259Scharnier 3220253Sjoerg#include <ctype.h> 3330259Scharnier#include <err.h> 3420253Sjoerg#include <termios.h> 3530259Scharnier#include <unistd.h> 3620253Sjoerg 3720253Sjoerg#include "pw.h" 3820253Sjoerg#include "bitmap.h" 3920253Sjoerg 4020253Sjoerg 4120253Sjoergstatic int print_group(struct group * grp, int pretty); 4220253Sjoergstatic gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args); 4320253Sjoerg 4420253Sjoergint 4520253Sjoergpw_group(struct userconf * cnf, int mode, struct cargs * args) 4620253Sjoerg{ 4720253Sjoerg struct carg *a_name = getarg(args, 'n'); 4820253Sjoerg struct carg *a_gid = getarg(args, 'g'); 4920253Sjoerg struct carg *arg; 5020253Sjoerg struct group *grp = NULL; 5120747Sdavidn int grmembers = 0; 5220747Sdavidn char **members = NULL; 5320253Sjoerg 5420253Sjoerg static struct group fakegroup = 5520253Sjoerg { 5620253Sjoerg "nogroup", 5720253Sjoerg "*", 5820253Sjoerg -1, 5920253Sjoerg NULL 6020253Sjoerg }; 6120253Sjoerg 6220267Sjoerg /* 6320267Sjoerg * With M_NEXT, we only need to return the 6420267Sjoerg * next gid to stdout 6520267Sjoerg */ 6620267Sjoerg if (mode == M_NEXT) 6720267Sjoerg { 6820267Sjoerg gid_t next = gr_gidpolicy(cnf, args); 6920267Sjoerg if (getarg(args, 'q')) 7020267Sjoerg return next; 7120267Sjoerg printf("%ld\n", (long)next); 7220267Sjoerg return EXIT_SUCCESS; 7320267Sjoerg } 7420267Sjoerg 7520253Sjoerg if (mode == M_PRINT && getarg(args, 'a')) { 7620267Sjoerg int pretty = getarg(args, 'P') != NULL; 7720253Sjoerg 7844229Sdavidn SETGRENT(); 7944229Sdavidn while ((grp = GETGRENT()) != NULL) 8020253Sjoerg print_group(grp, pretty); 8144229Sdavidn ENDGRENT(); 8220267Sjoerg return EXIT_SUCCESS; 8320253Sjoerg } 8420253Sjoerg if (a_gid == NULL) { 8520253Sjoerg if (a_name == NULL) 8630259Scharnier errx(EX_DATAERR, "group name or id required"); 8720253Sjoerg 8820253Sjoerg if (mode != M_ADD && grp == NULL && isdigit(*a_name->val)) { 8920253Sjoerg (a_gid = a_name)->ch = 'g'; 9020253Sjoerg a_name = NULL; 9120253Sjoerg } 9220253Sjoerg } 9344229Sdavidn grp = (a_name != NULL) ? GETGRNAM(a_name->val) : GETGRGID((gid_t) atoi(a_gid->val)); 9420253Sjoerg 9520253Sjoerg if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) { 9620253Sjoerg if (a_name == NULL && grp == NULL) /* Try harder */ 9744229Sdavidn grp = GETGRGID(atoi(a_gid->val)); 9820253Sjoerg 9920253Sjoerg if (grp == NULL) { 10020253Sjoerg if (mode == M_PRINT && getarg(args, 'F')) { 10120747Sdavidn char *fmems[1]; 10220747Sdavidn fmems[0] = NULL; 10320253Sjoerg fakegroup.gr_name = a_name ? a_name->val : "nogroup"; 10420253Sjoerg fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1; 10520747Sdavidn fakegroup.gr_mem = fmems; 10620267Sjoerg return print_group(&fakegroup, getarg(args, 'P') != NULL); 10720253Sjoerg } 10830259Scharnier errx(EX_DATAERR, "unknown group `%s'", a_name ? a_name->val : a_gid->val); 10920253Sjoerg } 11020253Sjoerg if (a_name == NULL) /* Needed later */ 11120253Sjoerg a_name = addarg(args, 'n', grp->gr_name); 11220253Sjoerg 11320253Sjoerg /* 11420253Sjoerg * Handle deletions now 11520253Sjoerg */ 11620253Sjoerg if (mode == M_DELETE) { 11720253Sjoerg gid_t gid = grp->gr_gid; 11820253Sjoerg 11920253Sjoerg if (delgrent(grp) == -1) 12030259Scharnier err(EX_IOERR, "error updating group file"); 12120253Sjoerg pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid); 12220267Sjoerg return EXIT_SUCCESS; 12320253Sjoerg } else if (mode == M_PRINT) 12420267Sjoerg return print_group(grp, getarg(args, 'P') != NULL); 12520253Sjoerg 12620253Sjoerg if (a_gid) 12720253Sjoerg grp->gr_gid = (gid_t) atoi(a_gid->val); 12820253Sjoerg 12920253Sjoerg if ((arg = getarg(args, 'l')) != NULL) 13020679Sdavidn grp->gr_name = pw_checkname((u_char *)arg->val, 0); 13120253Sjoerg } else { 13220253Sjoerg if (a_name == NULL) /* Required */ 13330259Scharnier errx(EX_DATAERR, "group name required"); 13420253Sjoerg else if (grp != NULL) /* Exists */ 13530259Scharnier errx(EX_DATAERR, "group name `%s' already exists", a_name->val); 13620253Sjoerg 13720747Sdavidn extendarray(&members, &grmembers, 200); 13820747Sdavidn members[0] = NULL; 13920253Sjoerg grp = &fakegroup; 14020679Sdavidn grp->gr_name = pw_checkname((u_char *)a_name->val, 0); 14120253Sjoerg grp->gr_passwd = "*"; 14220253Sjoerg grp->gr_gid = gr_gidpolicy(cnf, args); 14320253Sjoerg grp->gr_mem = members; 14420253Sjoerg } 14520253Sjoerg 14620253Sjoerg /* 14720253Sjoerg * This allows us to set a group password Group passwords is an 14820253Sjoerg * antique idea, rarely used and insecure (no secure database) Should 14920253Sjoerg * be discouraged, but it is apparently still supported by some 15020253Sjoerg * software. 15120253Sjoerg */ 15220253Sjoerg 15320253Sjoerg if ((arg = getarg(args, 'h')) != NULL) { 15420253Sjoerg if (strcmp(arg->val, "-") == 0) 15520253Sjoerg grp->gr_passwd = "*"; /* No access */ 15620253Sjoerg else { 15720253Sjoerg int fd = atoi(arg->val); 15820253Sjoerg int b; 15920253Sjoerg int istty = isatty(fd); 16020253Sjoerg struct termios t; 16120253Sjoerg char *p, line[256]; 16220253Sjoerg 16320253Sjoerg if (istty) { 16420253Sjoerg if (tcgetattr(fd, &t) == -1) 16520253Sjoerg istty = 0; 16620253Sjoerg else { 16720253Sjoerg struct termios n = t; 16820253Sjoerg 16920253Sjoerg /* Disable echo */ 17020253Sjoerg n.c_lflag &= ~(ECHO); 17120253Sjoerg tcsetattr(fd, TCSANOW, &n); 17220253Sjoerg printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name); 17320253Sjoerg fflush(stdout); 17420253Sjoerg } 17520253Sjoerg } 17620253Sjoerg b = read(fd, line, sizeof(line) - 1); 17720253Sjoerg if (istty) { /* Restore state */ 17820253Sjoerg tcsetattr(fd, TCSANOW, &t); 17920253Sjoerg fputc('\n', stdout); 18020253Sjoerg fflush(stdout); 18120253Sjoerg } 18220253Sjoerg if (b < 0) { 18330259Scharnier warn("-h file descriptor"); 18420267Sjoerg return EX_OSERR; 18520253Sjoerg } 18620253Sjoerg line[b] = '\0'; 18720253Sjoerg if ((p = strpbrk(line, " \t\r\n")) != NULL) 18820253Sjoerg *p = '\0'; 18920253Sjoerg if (!*line) 19030259Scharnier errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 19120253Sjoerg grp->gr_passwd = pw_pwcrypt(line); 19220253Sjoerg } 19320253Sjoerg } 19420267Sjoerg 19520267Sjoerg if (((arg = getarg(args, 'M')) != NULL || (arg = getarg(args, 'm')) != NULL) && arg->val) { 19620267Sjoerg int i = 0; 19720267Sjoerg char *p; 19820267Sjoerg struct passwd *pwd; 19920267Sjoerg 20020747Sdavidn /* Make sure this is not stay NULL with -M "" */ 20120747Sdavidn extendarray(&members, &grmembers, 200); 20220267Sjoerg if (arg->ch == 'm') { 20320747Sdavidn int k = 0; 20420747Sdavidn 20520747Sdavidn while (grp->gr_mem[k] != NULL) { 20620747Sdavidn if (extendarray(&members, &grmembers, i + 2) != -1) { 20720747Sdavidn members[i++] = grp->gr_mem[k]; 20820747Sdavidn } 20920747Sdavidn k++; 21020267Sjoerg } 21120267Sjoerg } 21220747Sdavidn for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 21320267Sjoerg int j; 21444229Sdavidn if ((pwd = GETPWNAM(p)) == NULL) { 21520267Sjoerg if (!isdigit(*p) || (pwd = getpwuid((uid_t) atoi(p))) == NULL) 21630259Scharnier errx(EX_NOUSER, "user `%s' does not exist", p); 21720267Sjoerg } 21820267Sjoerg /* 21920267Sjoerg * Check for duplicates 22020267Sjoerg */ 22120267Sjoerg for (j = 0; j < i && strcmp(members[j], pwd->pw_name)!=0; j++) 22220267Sjoerg ; 22320747Sdavidn if (j == i && extendarray(&members, &grmembers, i + 2) != -1) 22420267Sjoerg members[i++] = newstr(pwd->pw_name); 22520267Sjoerg } 22620747Sdavidn while (i < grmembers) 22720267Sjoerg members[i++] = NULL; 22820267Sjoerg grp->gr_mem = members; 22920267Sjoerg } 23020267Sjoerg 23120267Sjoerg if (getarg(args, 'N') != NULL) 23220267Sjoerg return print_group(grp, getarg(args, 'P') != NULL); 23320267Sjoerg 23420253Sjoerg if ((mode == M_ADD && !addgrent(grp)) || (mode == M_UPDATE && !chggrent(a_name->val, grp))) { 23530259Scharnier warn("group update"); 23620267Sjoerg return EX_IOERR; 23720253Sjoerg } 23820253Sjoerg /* grp may have been invalidated */ 23944229Sdavidn if ((grp = GETGRNAM(a_name->val)) == NULL) 24030259Scharnier errx(EX_SOFTWARE, "group disappeared during update"); 24120253Sjoerg 24220253Sjoerg pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid); 24320253Sjoerg 24420747Sdavidn if (members) 24520747Sdavidn free(members); 24620747Sdavidn 24720267Sjoerg return EXIT_SUCCESS; 24820253Sjoerg} 24920253Sjoerg 25020253Sjoerg 25120253Sjoergstatic gid_t 25220253Sjoerggr_gidpolicy(struct userconf * cnf, struct cargs * args) 25320253Sjoerg{ 25420253Sjoerg struct group *grp; 25520253Sjoerg gid_t gid = (gid_t) - 1; 25620253Sjoerg struct carg *a_gid = getarg(args, 'g'); 25720253Sjoerg 25820253Sjoerg /* 25920253Sjoerg * Check the given gid, if any 26020253Sjoerg */ 26120253Sjoerg if (a_gid != NULL) { 26220253Sjoerg gid = (gid_t) atol(a_gid->val); 26320253Sjoerg 26444229Sdavidn if ((grp = GETGRGID(gid)) != NULL && getarg(args, 'o') == NULL) 26530259Scharnier errx(EX_DATAERR, "gid `%ld' has already been allocated", (long) grp->gr_gid); 26620253Sjoerg } else { 26720253Sjoerg struct bitmap bm; 26820253Sjoerg 26920253Sjoerg /* 27020253Sjoerg * We need to allocate the next available gid under one of 27120253Sjoerg * two policies a) Grab the first unused gid b) Grab the 27220253Sjoerg * highest possible unused gid 27320253Sjoerg */ 27420253Sjoerg if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */ 27520253Sjoerg cnf->min_gid = 1000; 27620253Sjoerg cnf->max_gid = 32000; 27720253Sjoerg } 27820253Sjoerg bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1); 27920253Sjoerg 28020253Sjoerg /* 28120253Sjoerg * Now, let's fill the bitmap from the password file 28220253Sjoerg */ 28344229Sdavidn SETGRENT(); 28444229Sdavidn while ((grp = GETGRENT()) != NULL) 28520253Sjoerg if (grp->gr_gid >= (int) cnf->min_gid && grp->gr_gid <= (int) cnf->max_gid) 28620253Sjoerg bm_setbit(&bm, grp->gr_gid - cnf->min_gid); 28744229Sdavidn ENDGRENT(); 28820253Sjoerg 28920253Sjoerg /* 29020253Sjoerg * Then apply the policy, with fallback to reuse if necessary 29120253Sjoerg */ 29220253Sjoerg if (cnf->reuse_gids) 29320253Sjoerg gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid); 29420253Sjoerg else { 29520253Sjoerg gid = (gid_t) (bm_lastset(&bm) + 1); 29620253Sjoerg if (!bm_isset(&bm, gid)) 29720253Sjoerg gid += cnf->min_gid; 29820253Sjoerg else 29920253Sjoerg gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid); 30020253Sjoerg } 30120253Sjoerg 30220253Sjoerg /* 30320253Sjoerg * Another sanity check 30420253Sjoerg */ 30520253Sjoerg if (gid < cnf->min_gid || gid > cnf->max_gid) 30630259Scharnier errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used"); 30720253Sjoerg bm_dealloc(&bm); 30820253Sjoerg } 30920253Sjoerg return gid; 31020253Sjoerg} 31120253Sjoerg 31220253Sjoerg 31320253Sjoergstatic int 31420253Sjoergprint_group(struct group * grp, int pretty) 31520253Sjoerg{ 31620253Sjoerg if (!pretty) { 31720747Sdavidn int buflen = 0; 31820747Sdavidn char *buf = NULL; 31920253Sjoerg 32020747Sdavidn fmtgrent(&buf, &buflen, grp); 32120253Sjoerg fputs(buf, stdout); 32220747Sdavidn free(buf); 32320253Sjoerg } else { 32420253Sjoerg int i; 32520253Sjoerg 32622398Sdavidn printf("Group Name: %-15s #%lu\n" 32720747Sdavidn " Members: ", 32820253Sjoerg grp->gr_name, (long) grp->gr_gid); 32920747Sdavidn for (i = 0; grp->gr_mem[i]; i++) 33020253Sjoerg printf("%s%s", i ? "," : "", grp->gr_mem[i]); 33120253Sjoerg fputs("\n\n", stdout); 33220253Sjoerg } 33320267Sjoerg return EXIT_SUCCESS; 33420253Sjoerg} 335