/*- * Copyright (c) 1990, 1993, 1994 * The Regents of the University of California. 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. * 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 the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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. */ #ifndef lint static const char sccsid[] = "@(#)pw_copy.c 8.4 (Berkeley) 4/2/94"; #endif /* not lint */ #include __FBSDID("$FreeBSD$"); /* * This module is used to copy the master password file, replacing a single * record, by chpass(1) and passwd(1). */ #include #include #include #include #include #if 0 #include #endif extern int pw_big_ids_warning; extern int pw_scan(char *, struct passwd *); #include extern char *tempname; /* for use in pw_copy(). Compare a pw entry to a pw struct. */ static int pw_equal(char *buf, struct passwd *pw) { struct passwd buf_pw; int len; len = strlen (buf); if (buf[len-1] == '\n') buf[len-1] = '\0'; return (strcmp(pw->pw_name, buf_pw.pw_name) == 0 && pw->pw_uid == buf_pw.pw_uid && pw->pw_gid == buf_pw.pw_gid && strcmp(pw->pw_class, buf_pw.pw_class) == 0 && (long)pw->pw_change == (long)buf_pw.pw_change && (long)pw->pw_expire == (long)buf_pw.pw_expire && strcmp(pw->pw_gecos, buf_pw.pw_gecos) == 0 && strcmp(pw->pw_dir, buf_pw.pw_dir) == 0 && strcmp(pw->pw_shell, buf_pw.pw_shell) == 0); } void pw_copy(int ffd, int tfd, struct passwd *pw, struct passwd *old_pw) { FILE *from, *to; int done; char *p, buf[8192]; char uidstr[20]; char gidstr[20]; char chgstr[20]; char expstr[20]; snprintf(uidstr, sizeof(uidstr), "%lu", (unsigned long)pw->pw_uid); snprintf(gidstr, sizeof(gidstr), "%lu", (unsigned long)pw->pw_gid); snprintf(chgstr, sizeof(chgstr), "%ld", (long)pw->pw_change); snprintf(expstr, sizeof(expstr), "%ld", (long)pw->pw_expire); if (!(from = fdopen(ffd, "r"))) pw_error(_PATH_MASTERPASSWD, 1, 1); if (!(to = fdopen(tfd, "w"))) pw_error(tempname, 1, 1); for (done = 0; fgets(buf, sizeof(buf), from);) { if (!strchr(buf, '\n')) { warnx("%s: line too long", _PATH_MASTERPASSWD); pw_error(NULL, 0, 1); } if (done) { (void)fprintf(to, "%s", buf); if (ferror(to)) goto err; continue; } for (p = buf; *p != '\n'; p++) if (*p != ' ' && *p != '\t') break; if (*p == '#' || *p == '\n') { (void)fprintf(to, "%s", buf); if (ferror(to)) goto err; continue; } if (!(p = strchr(buf, ':'))) { warnx("%s: corrupted entry", _PATH_MASTERPASSWD); pw_error(NULL, 0, 1); } *p = '\0'; if (strcmp(buf, pw->pw_name)) { *p = ':'; (void)fprintf(to, "%s", buf); if (ferror(to)) goto err; continue; } *p = ':'; if (old_pw && !pw_equal(buf, old_pw)) { warnx("%s: entry for %s has changed", _PATH_MASTERPASSWD, pw->pw_name); pw_error(NULL, 0, 1); } (void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, pw->pw_fields & _PWF_UID ? uidstr : "", pw->pw_fields & _PWF_GID ? gidstr : "", pw->pw_class, pw->pw_fields & _PWF_CHANGE ? chgstr : "", pw->pw_fields & _PWF_EXPIRE ? expstr : "", pw->pw_gecos, pw->pw_dir, pw->pw_shell); done = 1; if (ferror(to)) goto err; } if (!done) { #ifdef YP /* Ultra paranoid: shouldn't happen. */ if (getuid()) { warnx("%s: not found in %s -- permission denied", pw->pw_name, _PATH_MASTERPASSWD); pw_error(NULL, 0, 1); } else #endif /* YP */ (void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, pw->pw_fields & _PWF_UID ? uidstr : "", pw->pw_fields & _PWF_GID ? gidstr : "", pw->pw_class, pw->pw_fields & _PWF_CHANGE ? chgstr : "", pw->pw_fields & _PWF_EXPIRE ? expstr : "", pw->pw_gecos, pw->pw_dir, pw->pw_shell); } if (ferror(to)) err: pw_error(NULL, 1, 1); (void)fclose(to); } #include #include #include #include #include #include #include #include #include /* * Some software assumes that IDs are short. We should emit warnings * for id's which can not be stored in a short, but we are more liberal * by default, warning for IDs greater than USHRT_MAX. * * If pw_big_ids_warning is anything other than -1 on entry to pw_scan() * it will be set based on the existance of PW_SCAN_BIG_IDS in the * environment. */ int pw_big_ids_warning = -1; int pw_scan(bp, pw) char *bp; struct passwd *pw; { uid_t id; int root; char *p, *sh; if (pw_big_ids_warning == -1) pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0; pw->pw_fields = 0; if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ goto fmt; root = !strcmp(pw->pw_name, "root"); if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0')) pw->pw_fields |= _PWF_NAME; if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ goto fmt; if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD; if (!(p = strsep(&bp, ":"))) /* uid */ goto fmt; if (p[0]) pw->pw_fields |= _PWF_UID; else { if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') { warnx("no uid for user %s", pw->pw_name); return (0); } } id = strtoul(p, (char **)NULL, 10); if (errno == ERANGE) { warnx("%s > max uid value (%lu)", p, ULONG_MAX); return (0); } if (root && id) { warnx("root uid should be 0"); return (0); } if (pw_big_ids_warning && id > USHRT_MAX) { warnx("%s > recommended max uid value (%u)", p, USHRT_MAX); /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */ } pw->pw_uid = id; if (!(p = strsep(&bp, ":"))) /* gid */ goto fmt; if(p[0]) pw->pw_fields |= _PWF_GID; id = strtoul(p, (char **)NULL, 10); if (errno == ERANGE) { warnx("%s > max gid value (%u)", p, ULONG_MAX); return (0); } if (pw_big_ids_warning && id > USHRT_MAX) { warnx("%s > recommended max gid value (%u)", p, USHRT_MAX); /* return (0); This should not be fatal! */ } pw->pw_gid = id; pw->pw_class = strsep(&bp, ":"); /* class */ if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS; if (!(p = strsep(&bp, ":"))) /* change */ goto fmt; if(p[0]) pw->pw_fields |= _PWF_CHANGE; pw->pw_change = atol(p); if (!(p = strsep(&bp, ":"))) /* expire */ goto fmt; if(p[0]) pw->pw_fields |= _PWF_EXPIRE; pw->pw_expire = atol(p); if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */ goto fmt; if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS; if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */ goto fmt; if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR; if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ goto fmt; p = pw->pw_shell; if (root && *p) /* empty == /bin/sh */ for (setusershell();;) { if (!(sh = getusershell())) { warnx("warning, unknown root shell"); break; } if (!strcmp(p, sh)) break; } if(p[0]) pw->pw_fields |= _PWF_SHELL; if ((p = strsep(&bp, ":"))) { /* too many */ fmt: warnx("corrupted entry"); return (0); } return (1); }