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33 * @(#)pw_util.c 8.3 (Berkeley) 4/2/94
34 * $FreeBSD: src/usr.sbin/vipw/pw_util.c,v 1.17.2.4 2002/09/04 15:28:10 des Exp $
35 * $DragonFly: src/usr.sbin/vipw/pw_util.c,v 1.5 2005/12/26 20:18:56 dillon Exp $
39 * This file is used by all the "password" programs; vipw(8), chpass(1),
43 #include <sys/param.h>
44 #include <sys/errno.h>
46 #include <sys/resource.h>
62 extern char *tempname;
63 static pid_t editpid = -1;
65 char *mppath = _PATH_PWD;
66 char *masterpasswd = _PATH_MASTERPASSWD;
81 /* Unlimited resource limits. */
82 rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
83 setrlimit(RLIMIT_CPU, &rlim);
84 setrlimit(RLIMIT_FSIZE, &rlim);
85 setrlimit(RLIMIT_STACK, &rlim);
86 setrlimit(RLIMIT_DATA, &rlim);
87 setrlimit(RLIMIT_RSS, &rlim);
89 /* Don't drop core (not really necessary, but GP's). */
90 rlim.rlim_cur = rlim.rlim_max = 0;
91 setrlimit(RLIMIT_CORE, &rlim);
93 /* Turn off signals. */
94 signal(SIGALRM, SIG_IGN);
95 signal(SIGHUP, SIG_IGN);
96 signal(SIGINT, SIG_IGN);
97 signal(SIGPIPE, SIG_IGN);
98 signal(SIGQUIT, SIG_IGN);
99 signal(SIGTERM, SIG_IGN);
100 signal(SIGCONT, pw_cont);
102 /* Create with exact permissions. */
110 * If the master password file doesn't exist, the system is hosed.
111 * Might as well try to build one. Set the close-on-exec bit so
112 * that users can't get at the encrypted passwords while editing.
113 * Open should allow flock'ing the file; see 4.4BSD. XXX
118 lockfd = open(masterpasswd, O_RDONLY, 0);
119 if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1)
120 err(1, "%s", masterpasswd);
121 if (flock(lockfd, LOCK_EX|LOCK_NB))
122 errx(1, "the password db file is busy");
125 * If the password file was replaced while we were trying to
126 * get the lock, our hardlink count will be 0 and we have to
129 if (fstat(lockfd, &st) < 0)
130 errx(1, "fstat() failed");
131 if (st.st_nlink != 0)
142 static char path[MAXPATHLEN];
146 if ((p = strrchr(masterpasswd, '/')) == NULL)
147 strcpy(path, "pw.XXXXXX");
149 if (snprintf(path, sizeof path, "%.*s/pw.XXXXXX",
150 (int)(p - masterpasswd), masterpasswd) >= sizeof path)
151 errx(1, "%s: path too long", masterpasswd);
152 if ((fd = mkstemp(path)) == -1)
159 pw_mkdb(char *username)
165 if (!(pid = fork())) {
167 warnx("rebuilding the database...");
168 execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-d", mppath,
171 warnx("updating the database...");
172 execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-d", mppath,
173 "-u", username, tempname, NULL);
175 pw_error(_PATH_PWD_MKDB, 1, 1);
177 pid = waitpid(pid, &pstat, 0);
178 if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0)
185 pw_edit(int notsetuid)
190 if (!(editor = getenv("EDITOR")))
192 if ((p = strrchr(editor, '/')))
197 if (!(editpid = fork())) {
203 execlp(editor, p, tempname, NULL);
207 editpid = waitpid(editpid, (int *)&pstat, 0);
208 errno = WEXITSTATUS(pstat);
210 pw_error(editor, 1, 1);
211 else if (WIFSTOPPED(pstat))
212 ; /*raise(WSTOPSIG(pstat));*/
213 else if (WIFEXITED(pstat) && errno == 0)
216 pw_error(editor, 1, 1);
226 printf("re-edit the password file? [y]: ");
228 first = c = getchar();
229 while (c != '\n' && c != EOF)
232 pw_error(NULL, 0, 0);
236 pw_error(char *name, int err, int eval)
249 warnx("NIS information unchanged");
252 warnx("%s: unchanged", masterpasswd);