pw_group.c revision 124382
1356290Sjkim/*- 2110010Smarkm * Copyright (C) 1996 3110010Smarkm * David L. Nugent. All rights reserved. 4142429Snectar * 5110010Smarkm * Redistribution and use in source and binary forms, with or without 6110010Smarkm * modification, are permitted provided that the following conditions 7110010Smarkm * are met: 8110010Smarkm * 1. Redistributions of source code must retain the above copyright 9110010Smarkm * notice, this list of conditions and the following disclaimer. 10110010Smarkm * 2. Redistributions in binary form must reproduce the above copyright 11110010Smarkm * notice, this list of conditions and the following disclaimer in the 12110010Smarkm * documentation and/or other materials provided with the distribution. 13110010Smarkm * 14110010Smarkm * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15110010Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16110010Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17110010Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18110010Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19110010Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20215698Ssimon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21215698Ssimon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22215698Ssimon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23215698Ssimon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24215698Ssimon * SUCH DAMAGE. 25110010Smarkm */ 26110010Smarkm 27110010Smarkm#ifndef lint 28110010Smarkmstatic const char rcsid[] = 29110010Smarkm "$FreeBSD: head/usr.sbin/pw/pw_group.c 124382 2004-01-11 18:28:08Z iedowse $"; 30110010Smarkm#endif /* not lint */ 31110010Smarkm 32110010Smarkm#include <ctype.h> 33110010Smarkm#include <err.h> 34110010Smarkm#include <termios.h> 35110010Smarkm#include <unistd.h> 36110010Smarkm 37110010Smarkm#include "pw.h" 38110010Smarkm#include "bitmap.h" 39110010Smarkm 40110010Smarkm 41276861Sjkimstatic int print_group(struct group * grp, int pretty); 42276861Sjkimstatic gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args); 43110010Smarkm 44110010Smarkmint 45215698Ssimonpw_group(struct userconf * cnf, int mode, struct cargs * args) 46215698Ssimon{ 47215698Ssimon int rc; 48215698Ssimon struct carg *a_name = getarg(args, 'n'); 49312826Sjkim struct carg *a_gid = getarg(args, 'g'); 50215698Ssimon struct carg *arg; 51142429Snectar struct group *grp = NULL; 52142429Snectar int grmembers = 0; 53276861Sjkim char **members = NULL; 54276861Sjkim 55276861Sjkim static struct group fakegroup = 56110010Smarkm { 57344604Sjkim "nogroup", 58344604Sjkim "*", 59344604Sjkim -1, 60344604Sjkim NULL 61344604Sjkim }; 62344604Sjkim 63215698Ssimon if (mode == M_LOCK || mode == M_UNLOCK) 64344604Sjkim errx(EX_USAGE, "'lock' command is not available for groups"); 65344604Sjkim 66344604Sjkim /* 67344604Sjkim * With M_NEXT, we only need to return the 68276861Sjkim * next gid to stdout 69215698Ssimon */ 70344604Sjkim if (mode == M_NEXT) { 71110010Smarkm gid_t next = gr_gidpolicy(cnf, args); 72110010Smarkm if (getarg(args, 'q')) 73110010Smarkm return next; 74110010Smarkm printf("%ld\n", (long)next); 75110010Smarkm return EXIT_SUCCESS; 76110010Smarkm } 77110010Smarkm 78110010Smarkm if (mode == M_PRINT && getarg(args, 'a')) { 79110010Smarkm int pretty = getarg(args, 'P') != NULL; 80110010Smarkm 81110010Smarkm SETGRENT(); 82110010Smarkm while ((grp = GETGRENT()) != NULL) 83110010Smarkm print_group(grp, pretty); 84110010Smarkm ENDGRENT(); 85110010Smarkm return EXIT_SUCCESS; 86110010Smarkm } 87110010Smarkm if (a_gid == NULL) { 88110010Smarkm if (a_name == NULL) 89110010Smarkm errx(EX_DATAERR, "group name or id required"); 90110010Smarkm 91110010Smarkm if (mode != M_ADD && grp == NULL && isdigit((unsigned char)*a_name->val)) { 92110010Smarkm (a_gid = a_name)->ch = 'g'; 93110010Smarkm a_name = NULL; 94110010Smarkm } 95110010Smarkm } 96110010Smarkm grp = (a_name != NULL) ? GETGRNAM(a_name->val) : GETGRGID((gid_t) atoi(a_gid->val)); 97110010Smarkm 98110010Smarkm if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) { 99110010Smarkm if (a_name == NULL && grp == NULL) /* Try harder */ 100110010Smarkm grp = GETGRGID(atoi(a_gid->val)); 101110010Smarkm 102110010Smarkm if (grp == NULL) { 103110010Smarkm if (mode == M_PRINT && getarg(args, 'F')) { 104110010Smarkm char *fmems[1]; 105110010Smarkm fmems[0] = NULL; 106110010Smarkm fakegroup.gr_name = a_name ? a_name->val : "nogroup"; 107110010Smarkm fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1; 108110010Smarkm fakegroup.gr_mem = fmems; 109110010Smarkm return print_group(&fakegroup, getarg(args, 'P') != NULL); 110110010Smarkm } 111110010Smarkm errx(EX_DATAERR, "unknown group `%s'", a_name ? a_name->val : a_gid->val); 112110010Smarkm } 113110010Smarkm if (a_name == NULL) /* Needed later */ 114110010Smarkm a_name = addarg(args, 'n', grp->gr_name); 115110010Smarkm 116110010Smarkm /* 117110010Smarkm * Handle deletions now 118110010Smarkm */ 119110010Smarkm if (mode == M_DELETE) { 120110010Smarkm gid_t gid = grp->gr_gid; 121110010Smarkm 122110010Smarkm rc = delgrent(grp); 123110010Smarkm if (rc == -1) 124110010Smarkm err(EX_IOERR, "group '%s' not available (NIS?)", grp->gr_name); 125110010Smarkm else if (rc != 0) { 126110010Smarkm warn("group update"); 127110010Smarkm return EX_IOERR; 128110010Smarkm } 129110010Smarkm pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid); 130110010Smarkm return EXIT_SUCCESS; 131110010Smarkm } else if (mode == M_PRINT) 132110010Smarkm return print_group(grp, getarg(args, 'P') != NULL); 133142429Snectar 134110010Smarkm if (a_gid) 135110655Snectar grp->gr_gid = (gid_t) atoi(a_gid->val); 136356290Sjkim 137215698Ssimon if ((arg = getarg(args, 'l')) != NULL) 138215698Ssimon grp->gr_name = pw_checkname((u_char *)arg->val, 0); 139215698Ssimon } else { 140215698Ssimon if (a_name == NULL) /* Required */ 141110010Smarkm errx(EX_DATAERR, "group name required"); 142325337Sjkim else if (grp != NULL) /* Exists */ 143142429Snectar errx(EX_DATAERR, "group name `%s' already exists", a_name->val); 144110010Smarkm 145110010Smarkm extendarray(&members, &grmembers, 200); 146110010Smarkm members[0] = NULL; 147142429Snectar grp = &fakegroup; 148269682Sjkim grp->gr_name = pw_checkname((u_char *)a_name->val, 0); 149110010Smarkm grp->gr_passwd = "*"; 150264278Sjkim grp->gr_gid = gr_gidpolicy(cnf, args); 151110010Smarkm grp->gr_mem = members; 152160819Ssimon } 153110010Smarkm 154160819Ssimon /* 155160819Ssimon * This allows us to set a group password Group passwords is an 156110010Smarkm * antique idea, rarely used and insecure (no secure database) Should 157110010Smarkm * be discouraged, but it is apparently still supported by some 158284283Sjkim * software. 159110010Smarkm */ 160110010Smarkm 161110010Smarkm if ((arg = getarg(args, 'h')) != NULL || 162110010Smarkm (arg = getarg(args, 'H')) != NULL) { 163110010Smarkm if (strcmp(arg->val, "-") == 0) 164110010Smarkm grp->gr_passwd = "*"; /* No access */ 165110010Smarkm else { 166110010Smarkm int fd = atoi(arg->val); 167110010Smarkm int precrypt = (arg->ch == 'H'); 168110010Smarkm int b; 169269682Sjkim int istty = isatty(fd); 170110010Smarkm struct termios t; 171110010Smarkm char *p, line[256]; 172110010Smarkm 173110010Smarkm if (istty) { 174110010Smarkm if (tcgetattr(fd, &t) == -1) 175110010Smarkm istty = 0; 176110010Smarkm else { 177290207Sjkim struct termios n = t; 178290207Sjkim 179290207Sjkim /* Disable echo */ 180110010Smarkm n.c_lflag &= ~(ECHO); 181325335Sjkim tcsetattr(fd, TCSANOW, &n); 182325335Sjkim printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name); 183110010Smarkm fflush(stdout); 184269682Sjkim } 185142429Snectar } 186110010Smarkm b = read(fd, line, sizeof(line) - 1); 187194208Ssimon if (istty) { /* Restore state */ 188194208Ssimon tcsetattr(fd, TCSANOW, &t); 189194208Ssimon fputc('\n', stdout); 190194208Ssimon fflush(stdout); 191142429Snectar } 192290207Sjkim if (b < 0) { 193269682Sjkim warn("-h file descriptor"); 194306195Sjkim return EX_OSERR; 195269682Sjkim } 196110010Smarkm line[b] = '\0'; 197110010Smarkm if ((p = strpbrk(line, " \t\r\n")) != NULL) 198110010Smarkm *p = '\0'; 199276861Sjkim if (!*line) 200110010Smarkm errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 201110010Smarkm if (precrypt) { 202110010Smarkm if (strchr(line, ':') != NULL) 203142429Snectar return EX_DATAERR; 204110010Smarkm grp->gr_passwd = line; 205110010Smarkm } else 206110010Smarkm grp->gr_passwd = pw_pwcrypt(line); 207269682Sjkim } 208269682Sjkim } 209337982Sjkim 210142429Snectar if (((arg = getarg(args, 'M')) != NULL || (arg = getarg(args, 'm')) != NULL) && arg->val) { 211110010Smarkm int i = 0; 212110010Smarkm char *p; 213110010Smarkm struct passwd *pwd; 214160819Ssimon 215160819Ssimon /* Make sure this is not stay NULL with -M "" */ 216276861Sjkim extendarray(&members, &grmembers, 200); 217142429Snectar if (arg->ch == 'm') { 218110010Smarkm int k = 0; 219110010Smarkm 220110010Smarkm while (grp->gr_mem[k] != NULL) { 221160819Ssimon if (extendarray(&members, &grmembers, i + 2) != -1) { 222160819Ssimon members[i++] = grp->gr_mem[k]; 223276861Sjkim } 224160819Ssimon k++; 225160819Ssimon } 226160819Ssimon } 227344604Sjkim for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 228142429Snectar int j; 229110010Smarkm if ((pwd = GETPWNAM(p)) == NULL) { 230110010Smarkm if (!isdigit((unsigned char)*p) || (pwd = getpwuid((uid_t) atoi(p))) == NULL) 231110010Smarkm errx(EX_NOUSER, "user `%s' does not exist", p); 232110010Smarkm } 233110010Smarkm /* 234110010Smarkm * Check for duplicates 235264278Sjkim */ 236264278Sjkim for (j = 0; j < i && strcmp(members[j], pwd->pw_name)!=0; j++) 237264278Sjkim ; 238264278Sjkim if (j == i && extendarray(&members, &grmembers, i + 2) != -1) 239142429Snectar members[i++] = newstr(pwd->pw_name); 240110010Smarkm } 241110010Smarkm while (i < grmembers) 242110010Smarkm members[i++] = NULL; 243110010Smarkm grp->gr_mem = members; 244142429Snectar } 245110010Smarkm 246110010Smarkm if (getarg(args, 'N') != NULL) 247110010Smarkm return print_group(grp, getarg(args, 'P') != NULL); 248284283Sjkim 249284283Sjkim if (mode == M_ADD && (rc = addgrent(grp)) != 0) { 250238405Sjkim if (rc == -1) 251238405Sjkim warnx("group '%s' already exists", grp->gr_name); 252142429Snectar else 253110010Smarkm warn("group update"); 254276861Sjkim return EX_IOERR; 255110010Smarkm } else if (mode == M_UPDATE && (rc = chggrent(a_name->val, grp)) != 0) { 256142429Snectar if (rc == -1) 257110010Smarkm warnx("group '%s' not available (NIS?)", grp->gr_name); 258110010Smarkm else 259142429Snectar warn("group update"); 260110010Smarkm return EX_IOERR; 261337982Sjkim } 262337982Sjkim /* grp may have been invalidated */ 263337982Sjkim if ((grp = GETGRNAM(a_name->val)) == NULL) 264142429Snectar errx(EX_SOFTWARE, "group disappeared during update"); 265110010Smarkm 266110010Smarkm pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid); 267110010Smarkm 268110010Smarkm if (members) 269110010Smarkm free(members); 270110010Smarkm 271276861Sjkim return EXIT_SUCCESS; 272110010Smarkm} 273110010Smarkm 274142429Snectar 275110010Smarkmstatic gid_t 276110010Smarkmgr_gidpolicy(struct userconf * cnf, struct cargs * args) 277142429Snectar{ 278110010Smarkm struct group *grp; 279110010Smarkm gid_t gid = (gid_t) - 1; 280142429Snectar struct carg *a_gid = getarg(args, 'g'); 281110010Smarkm 282110010Smarkm /* 283142429Snectar * Check the given gid, if any 284110010Smarkm */ 285110010Smarkm if (a_gid != NULL) { 286142429Snectar gid = (gid_t) atol(a_gid->val); 287110010Smarkm 288110010Smarkm if ((grp = GETGRGID(gid)) != NULL && getarg(args, 'o') == NULL) 289142429Snectar errx(EX_DATAERR, "gid `%ld' has already been allocated", (long) grp->gr_gid); 290110010Smarkm } else { 291110010Smarkm struct bitmap bm; 292110010Smarkm 293142429Snectar /* 294110010Smarkm * We need to allocate the next available gid under one of 295110010Smarkm * two policies a) Grab the first unused gid b) Grab the 296110010Smarkm * highest possible unused gid 297142429Snectar */ 298110010Smarkm if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */ 299110010Smarkm cnf->min_gid = 1000; 300110010Smarkm cnf->max_gid = 32000; 301269682Sjkim } 302269682Sjkim bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1); 303269682Sjkim 304269682Sjkim /* 305238405Sjkim * Now, let's fill the bitmap from the password file 306238405Sjkim */ 307238405Sjkim SETGRENT(); 308325337Sjkim while ((grp = GETGRENT()) != NULL) 309238405Sjkim if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid && 310238405Sjkim (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid) 311238405Sjkim bm_setbit(&bm, grp->gr_gid - cnf->min_gid); 312238405Sjkim ENDGRENT(); 313238405Sjkim 314325337Sjkim /* 315296279Sjkim * Then apply the policy, with fallback to reuse if necessary 316296279Sjkim */ 317296279Sjkim if (cnf->reuse_gids) 318296279Sjkim gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid); 319296279Sjkim else { 320290207Sjkim gid = (gid_t) (bm_lastset(&bm) + 1); 321290207Sjkim if (!bm_isset(&bm, gid)) 322290207Sjkim gid += cnf->min_gid; 323142429Snectar else 324110010Smarkm gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid); 325110010Smarkm } 326110010Smarkm 327325335Sjkim /* 328325335Sjkim * Another sanity check 329325335Sjkim */ 330325335Sjkim if (gid < cnf->min_gid || gid > cnf->max_gid) 331344604Sjkim errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used"); 332325335Sjkim bm_dealloc(&bm); 333325335Sjkim } 334325335Sjkim return gid; 335325335Sjkim} 336325335Sjkim 337325335Sjkim 338325335Sjkimstatic int 339325335Sjkimprint_group(struct group * grp, int pretty) 340142429Snectar{ 341110010Smarkm if (!pretty) { 342110010Smarkm int buflen = 0; 343110010Smarkm char *buf = NULL; 344110010Smarkm 345110010Smarkm fmtgrent(&buf, &buflen, grp); 346269682Sjkim fputs(buf, stdout); 347269682Sjkim free(buf); 348276861Sjkim } else { 349142429Snectar int i; 350142429Snectar 351142429Snectar printf("Group Name: %-15s #%lu\n" 352142429Snectar " Members: ", 353331638Sjkim grp->gr_name, (long) grp->gr_gid); 354194208Ssimon for (i = 0; grp->gr_mem[i]; i++) 355194208Ssimon printf("%s%s", i ? "," : "", grp->gr_mem[i]); 356238405Sjkim fputs("\n\n", stdout); 357194208Ssimon } 358194208Ssimon return EXIT_SUCCESS; 359238405Sjkim} 360194208Ssimon