pw_group.c revision 286150
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 286150 2015-08-01 09:55:47Z bapt $"; 3030259Scharnier#endif /* not lint */ 3130259Scharnier 3220253Sjoerg#include <ctype.h> 3330259Scharnier#include <err.h> 34286150Sbapt#include <inttypes.h> 3520253Sjoerg#include <termios.h> 36176474Sscf#include <stdbool.h> 3730259Scharnier#include <unistd.h> 38242349Sbapt#include <grp.h> 39242349Sbapt#include <libutil.h> 4020253Sjoerg 4120253Sjoerg#include "pw.h" 4220253Sjoerg#include "bitmap.h" 4320253Sjoerg 4420253Sjoerg 45176474Sscfstatic struct passwd *lookup_pwent(const char *user); 46285411Sbaptstatic void delete_members(struct group *grp, char *list); 47284122Sbaptstatic int print_group(struct group * grp); 48284133Sbaptstatic gid_t gr_gidpolicy(struct userconf * cnf, long id); 4920253Sjoerg 50285136Sbaptstatic void 51285136Sbaptset_passwd(struct group *grp, bool update) 52285136Sbapt{ 53285136Sbapt int b; 54285136Sbapt int istty; 55285136Sbapt struct termios t, n; 56285136Sbapt char *p, line[256]; 57285136Sbapt 58285136Sbapt if (conf.fd == '-') { 59285136Sbapt grp->gr_passwd = "*"; /* No access */ 60285136Sbapt return; 61285136Sbapt } 62285136Sbapt 63285136Sbapt if ((istty = isatty(conf.fd))) { 64285136Sbapt n = t; 65285136Sbapt /* Disable echo */ 66285136Sbapt n.c_lflag &= ~(ECHO); 67285136Sbapt tcsetattr(conf.fd, TCSANOW, &n); 68285136Sbapt printf("%sassword for group %s:", update ? "New p" : "P", 69285136Sbapt grp->gr_name); 70285136Sbapt fflush(stdout); 71285136Sbapt } 72285136Sbapt b = read(conf.fd, line, sizeof(line) - 1); 73285136Sbapt if (istty) { /* Restore state */ 74285136Sbapt tcsetattr(conf.fd, TCSANOW, &t); 75285136Sbapt fputc('\n', stdout); 76285136Sbapt fflush(stdout); 77285136Sbapt } 78285136Sbapt if (b < 0) 79285136Sbapt err(EX_OSERR, "-h file descriptor"); 80285136Sbapt line[b] = '\0'; 81285136Sbapt if ((p = strpbrk(line, " \t\r\n")) != NULL) 82285136Sbapt *p = '\0'; 83285136Sbapt if (!*line) 84285136Sbapt errx(EX_DATAERR, "empty password read on file descriptor %d", 85285136Sbapt conf.fd); 86285136Sbapt if (conf.precrypted) { 87285136Sbapt if (strchr(line, ':') != 0) 88285136Sbapt errx(EX_DATAERR, "wrong encrypted passwrd"); 89285136Sbapt grp->gr_passwd = line; 90285136Sbapt } else 91285136Sbapt grp->gr_passwd = pw_pwcrypt(line); 92285136Sbapt} 93285136Sbapt 9420253Sjoergint 95285395Sbaptpw_groupnext(struct userconf *cnf, bool quiet) 96285395Sbapt{ 97285395Sbapt gid_t next = gr_gidpolicy(cnf, -1); 98285395Sbapt 99285395Sbapt if (quiet) 100285395Sbapt return (next); 101286150Sbapt printf("%ju\n", (uintmax_t)next); 102285395Sbapt 103285395Sbapt return (EXIT_SUCCESS); 104285395Sbapt} 105285395Sbapt 106285398Sbaptstatic int 107285398Sbaptpw_groupshow(const char *name, long id, struct group *fakegroup) 108285398Sbapt{ 109285398Sbapt struct group *grp = NULL; 110285398Sbapt 111285398Sbapt if (id < 0 && name == NULL && !conf.all) 112285398Sbapt errx(EX_DATAERR, "groupname or id or '-a' required"); 113285398Sbapt 114285398Sbapt if (conf.all) { 115285398Sbapt SETGRENT(); 116285398Sbapt while ((grp = GETGRENT()) != NULL) 117285398Sbapt print_group(grp); 118285398Sbapt ENDGRENT(); 119285398Sbapt 120285398Sbapt return (EXIT_SUCCESS); 121285398Sbapt } 122285398Sbapt 123285398Sbapt grp = (name != NULL) ? GETGRNAM(name) : GETGRGID(id); 124285398Sbapt if (grp == NULL) { 125285398Sbapt if (conf.force) { 126285398Sbapt grp = fakegroup; 127285398Sbapt } else { 128285398Sbapt if (name == NULL) 129285398Sbapt errx(EX_DATAERR, "unknown gid `%ld'", id); 130285398Sbapt errx(EX_DATAERR, "unknown group `%s'", name); 131285398Sbapt } 132285398Sbapt } 133285398Sbapt 134285398Sbapt return (print_group(grp)); 135285398Sbapt} 136285398Sbapt 137285401Sbaptstatic int 138285401Sbaptpw_groupdel(const char *name, long id) 139285401Sbapt{ 140285401Sbapt struct group *grp = NULL; 141285401Sbapt int rc; 142285401Sbapt 143285401Sbapt grp = (name != NULL) ? GETGRNAM(name) : GETGRGID(id); 144285401Sbapt if (grp == NULL) { 145285401Sbapt if (name == NULL) 146285401Sbapt errx(EX_DATAERR, "unknown gid `%ld'", id); 147285401Sbapt errx(EX_DATAERR, "unknown group `%s'", name); 148285401Sbapt } 149285401Sbapt 150285401Sbapt rc = delgrent(grp); 151285401Sbapt if (rc == -1) 152285401Sbapt err(EX_IOERR, "group '%s' not available (NIS?)", name); 153285401Sbapt else if (rc != 0) 154285401Sbapt err(EX_IOERR, "group update"); 155285401Sbapt pw_log(conf.userconf, M_DELETE, W_GROUP, "%s(%ld) removed", name, id); 156285401Sbapt 157285401Sbapt return (EXIT_SUCCESS); 158285401Sbapt} 159285401Sbapt 160285395Sbaptint 161284128Sbaptpw_group(int mode, char *name, long id, struct cargs * args) 16220253Sjoerg{ 16352502Sdavidn int rc; 16420253Sjoerg struct carg *arg; 16520253Sjoerg struct group *grp = NULL; 166284118Sbapt struct userconf *cnf = conf.userconf; 16720253Sjoerg 16820253Sjoerg static struct group fakegroup = 16920253Sjoerg { 17020253Sjoerg "nogroup", 17120253Sjoerg "*", 17220253Sjoerg -1, 17320253Sjoerg NULL 17420253Sjoerg }; 17520253Sjoerg 176285395Sbapt if (mode == M_NEXT) 177285396Sbapt return (pw_groupnext(cnf, conf.quiet)); 178285395Sbapt 179285398Sbapt if (mode == M_PRINT) 180285398Sbapt return (pw_groupshow(name, id, &fakegroup)); 181285398Sbapt 182285401Sbapt if (mode == M_DELETE) 183285401Sbapt return (pw_groupdel(name, id)); 184285401Sbapt 18552512Sdavidn if (mode == M_LOCK || mode == M_UNLOCK) 18652512Sdavidn errx(EX_USAGE, "'lock' command is not available for groups"); 18752512Sdavidn 188284128Sbapt if (id < 0 && name == NULL) 189284128Sbapt errx(EX_DATAERR, "group name or id required"); 19020253Sjoerg 191284128Sbapt grp = (name != NULL) ? GETGRNAM(name) : GETGRGID(id); 19220253Sjoerg 193285401Sbapt if (mode == M_UPDATE) { 194284128Sbapt if (name == NULL && grp == NULL) /* Try harder */ 195284128Sbapt grp = GETGRGID(id); 19620253Sjoerg 19720253Sjoerg if (grp == NULL) { 198284128Sbapt if (name == NULL) 199284128Sbapt errx(EX_DATAERR, "unknown group `%s'", name); 200284128Sbapt else 201284128Sbapt errx(EX_DATAERR, "unknown group `%ld'", id); 20220253Sjoerg } 203284128Sbapt if (name == NULL) /* Needed later */ 204284128Sbapt name = grp->gr_name; 20520253Sjoerg 206284128Sbapt if (id > 0) 207284128Sbapt grp->gr_gid = (gid_t) id; 20820253Sjoerg 209284129Sbapt if (conf.newname != NULL) 210284129Sbapt grp->gr_name = pw_checkname(conf.newname, 0); 21120253Sjoerg } else { 212284128Sbapt if (name == NULL) /* Required */ 21330259Scharnier errx(EX_DATAERR, "group name required"); 21420253Sjoerg else if (grp != NULL) /* Exists */ 215284128Sbapt errx(EX_DATAERR, "group name `%s' already exists", name); 21620253Sjoerg 21720253Sjoerg grp = &fakegroup; 218284128Sbapt grp->gr_name = pw_checkname(name, 0); 21920253Sjoerg grp->gr_passwd = "*"; 220284133Sbapt grp->gr_gid = gr_gidpolicy(cnf, id); 221285411Sbapt grp->gr_mem = NULL; 22220253Sjoerg } 22320253Sjoerg 22420253Sjoerg /* 22520253Sjoerg * This allows us to set a group password Group passwords is an 22620253Sjoerg * antique idea, rarely used and insecure (no secure database) Should 22720253Sjoerg * be discouraged, but it is apparently still supported by some 22820253Sjoerg * software. 22920253Sjoerg */ 23020253Sjoerg 231285318Sbapt if (conf.which == W_GROUP && conf.fd != -1) 232285136Sbapt set_passwd(grp, mode == M_UPDATE); 23320253Sjoerg 234176474Sscf if (((arg = getarg(args, 'M')) != NULL || 235176474Sscf (arg = getarg(args, 'd')) != NULL || 236176474Sscf (arg = getarg(args, 'm')) != NULL) && arg->val) { 23720267Sjoerg char *p; 23820267Sjoerg struct passwd *pwd; 23920267Sjoerg 24020747Sdavidn /* Make sure this is not stay NULL with -M "" */ 241176474Sscf if (arg->ch == 'd') 242285411Sbapt delete_members(grp, arg->val); 243285411Sbapt else if (arg->ch == 'M') 244285411Sbapt grp->gr_mem = NULL; 24520747Sdavidn 246285411Sbapt for (p = strtok(arg->val, ", \t"); arg->ch != 'd' && p != NULL; 247285411Sbapt p = strtok(NULL, ", \t")) { 248285411Sbapt int j; 249285411Sbapt 250285411Sbapt /* 251285411Sbapt * Check for duplicates 252285411Sbapt */ 253285411Sbapt pwd = lookup_pwent(p); 254285411Sbapt for (j = 0; grp->gr_mem != NULL && grp->gr_mem[j] != NULL; j++) { 255285411Sbapt if (strcmp(grp->gr_mem[j], pwd->pw_name) == 0) 256285411Sbapt break; 25720267Sjoerg } 258285411Sbapt if (grp->gr_mem != NULL && grp->gr_mem[j] != NULL) 259285411Sbapt continue; 260285411Sbapt grp = gr_add(grp, pwd->pw_name); 26120267Sjoerg } 26220267Sjoerg } 26320267Sjoerg 264284121Sbapt if (conf.dryrun) 265284122Sbapt return print_group(grp); 26620267Sjoerg 26752502Sdavidn if (mode == M_ADD && (rc = addgrent(grp)) != 0) { 26852502Sdavidn if (rc == -1) 269283814Sbapt errx(EX_IOERR, "group '%s' already exists", 270283814Sbapt grp->gr_name); 27152502Sdavidn else 272283814Sbapt err(EX_IOERR, "group update"); 273284128Sbapt } else if (mode == M_UPDATE && (rc = chggrent(name, grp)) != 0) { 27452502Sdavidn if (rc == -1) 275283814Sbapt errx(EX_IOERR, "group '%s' not available (NIS?)", 276283814Sbapt grp->gr_name); 27752502Sdavidn else 278283814Sbapt err(EX_IOERR, "group update"); 27920253Sjoerg } 280273772Sbapt 281284129Sbapt if (conf.newname != NULL) 282284129Sbapt name = conf.newname; 28320253Sjoerg /* grp may have been invalidated */ 284284128Sbapt if ((grp = GETGRNAM(name)) == NULL) 28530259Scharnier errx(EX_SOFTWARE, "group disappeared during update"); 28620253Sjoerg 287286150Sbapt pw_log(cnf, mode, W_GROUP, "%s(%ju)", grp->gr_name, (uintmax_t)grp->gr_gid); 28820253Sjoerg 28920267Sjoerg return EXIT_SUCCESS; 29020253Sjoerg} 29120253Sjoerg 29220253Sjoerg 293176474Sscf/* 294176474Sscf * Lookup a passwd entry using a name or UID. 295176474Sscf */ 296176474Sscfstatic struct passwd * 297176474Sscflookup_pwent(const char *user) 298176474Sscf{ 299176474Sscf struct passwd *pwd; 300176474Sscf 301176474Sscf if ((pwd = GETPWNAM(user)) == NULL && 302176474Sscf (!isdigit((unsigned char)*user) || 303176474Sscf (pwd = getpwuid((uid_t) atoi(user))) == NULL)) 304176474Sscf errx(EX_NOUSER, "user `%s' does not exist", user); 305176474Sscf 306176474Sscf return (pwd); 307176474Sscf} 308176474Sscf 309176474Sscf 310176474Sscf/* 311176474Sscf * Delete requested members from a group. 312176474Sscf */ 313176474Sscfstatic void 314285411Sbaptdelete_members(struct group *grp, char *list) 315176474Sscf{ 316285411Sbapt char *p; 317176474Sscf int k; 318176474Sscf 319262864Sjulian if (grp->gr_mem == NULL) 320262864Sjulian return; 321262864Sjulian 322285411Sbapt for (p = strtok(list, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 323285411Sbapt for (k = 0; grp->gr_mem[k] != NULL; k++) { 324285411Sbapt if (strcmp(grp->gr_mem[k], p) == 0) 325176474Sscf break; 326176474Sscf } 327285411Sbapt if (grp->gr_mem[k] == NULL) /* No match */ 328285411Sbapt continue; 329176474Sscf 330285411Sbapt for (; grp->gr_mem[k] != NULL; k++) 331285411Sbapt grp->gr_mem[k] = grp->gr_mem[k+1]; 332176474Sscf } 333176474Sscf} 334176474Sscf 335176474Sscf 33620253Sjoergstatic gid_t 337284133Sbaptgr_gidpolicy(struct userconf * cnf, long id) 33820253Sjoerg{ 33920253Sjoerg struct group *grp; 34020253Sjoerg gid_t gid = (gid_t) - 1; 34120253Sjoerg 34220253Sjoerg /* 34320253Sjoerg * Check the given gid, if any 34420253Sjoerg */ 345284133Sbapt if (id > 0) { 346284133Sbapt gid = (gid_t) id; 34720253Sjoerg 348284133Sbapt if ((grp = GETGRGID(gid)) != NULL && conf.checkduplicate) 349286150Sbapt errx(EX_DATAERR, "gid `%ju' has already been allocated", (uintmax_t)grp->gr_gid); 35020253Sjoerg } else { 35120253Sjoerg struct bitmap bm; 35220253Sjoerg 35320253Sjoerg /* 35420253Sjoerg * We need to allocate the next available gid under one of 35520253Sjoerg * two policies a) Grab the first unused gid b) Grab the 35620253Sjoerg * highest possible unused gid 35720253Sjoerg */ 35820253Sjoerg if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */ 35920253Sjoerg cnf->min_gid = 1000; 36020253Sjoerg cnf->max_gid = 32000; 36120253Sjoerg } 36220253Sjoerg bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1); 36320253Sjoerg 36420253Sjoerg /* 36520253Sjoerg * Now, let's fill the bitmap from the password file 36620253Sjoerg */ 36744229Sdavidn SETGRENT(); 36844229Sdavidn while ((grp = GETGRENT()) != NULL) 36956000Sdavidn if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid && 37056000Sdavidn (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid) 37120253Sjoerg bm_setbit(&bm, grp->gr_gid - cnf->min_gid); 37244229Sdavidn ENDGRENT(); 37320253Sjoerg 37420253Sjoerg /* 37520253Sjoerg * Then apply the policy, with fallback to reuse if necessary 37620253Sjoerg */ 37720253Sjoerg if (cnf->reuse_gids) 37820253Sjoerg gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid); 37920253Sjoerg else { 38020253Sjoerg gid = (gid_t) (bm_lastset(&bm) + 1); 38120253Sjoerg if (!bm_isset(&bm, gid)) 38220253Sjoerg gid += cnf->min_gid; 38320253Sjoerg else 38420253Sjoerg gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid); 38520253Sjoerg } 38620253Sjoerg 38720253Sjoerg /* 38820253Sjoerg * Another sanity check 38920253Sjoerg */ 39020253Sjoerg if (gid < cnf->min_gid || gid > cnf->max_gid) 39130259Scharnier errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used"); 39220253Sjoerg bm_dealloc(&bm); 39320253Sjoerg } 39420253Sjoerg return gid; 39520253Sjoerg} 39620253Sjoerg 39720253Sjoerg 39820253Sjoergstatic int 399284122Sbaptprint_group(struct group * grp) 40020253Sjoerg{ 401284122Sbapt if (!conf.pretty) { 40220747Sdavidn char *buf = NULL; 40320253Sjoerg 404242349Sbapt buf = gr_make(grp); 405244738Sbapt printf("%s\n", buf); 40620747Sdavidn free(buf); 40720253Sjoerg } else { 40820253Sjoerg int i; 40920253Sjoerg 41022398Sdavidn printf("Group Name: %-15s #%lu\n" 41120747Sdavidn " Members: ", 41220253Sjoerg grp->gr_name, (long) grp->gr_gid); 413262864Sjulian if (grp->gr_mem != NULL) { 414262864Sjulian for (i = 0; grp->gr_mem[i]; i++) 415262864Sjulian printf("%s%s", i ? "," : "", grp->gr_mem[i]); 416262864Sjulian } 41720253Sjoerg fputs("\n\n", stdout); 41820253Sjoerg } 41920267Sjoerg return EXIT_SUCCESS; 42020253Sjoerg} 421