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29 * $FreeBSD: src/lib/libc/gen/pw_scan.c,v 1.25 2004/01/18 21:33:25 charnier Exp $
30 * $DragonFly: src/lib/libutil/pw_scan.c,v 1.3 2007/12/30 13:44:33 matthias Exp $
34 * This module is used to "verify" password entries by chpass(1) and
38 #include <sys/param.h>
52 * Some software assumes that IDs are short. We should emit warnings
53 * for id's which cannot be stored in a short, but we are more liberal
54 * by default, warning for IDs greater than USHRT_MAX.
56 * If pw_big_ids_warning is -1 on entry to pw_scan(), it will be set based
57 * on the existence of PW_SCAN_BIG_IDS in the environment.
59 static int pw_big_ids_warning = -1;
62 __pw_scan(char *bp, struct passwd *pw, int flags)
68 if (pw_big_ids_warning == -1)
69 pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
72 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
74 root = !strcmp(pw->pw_name, "root");
75 if (pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
76 pw->pw_fields |= _PWF_NAME;
78 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
81 pw->pw_fields |= _PWF_PASSWD;
83 if (!(p = strsep(&bp, ":"))) /* uid */
86 pw->pw_fields |= _PWF_UID;
88 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
89 if (flags & _PWSCAN_WARN)
90 warnx("no uid for user %s", pw->pw_name);
94 id = strtoul(p, &ep, 10);
95 if (errno == ERANGE) {
96 if (flags & _PWSCAN_WARN)
97 warnx("%s > max uid value (%lu)", p, ULONG_MAX);
101 if (flags & _PWSCAN_WARN)
102 warnx("%s uid is incorrect", p);
106 if (flags & _PWSCAN_WARN)
107 warnx("root uid should be 0");
110 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
111 warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
112 /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
116 if (!(p = strsep(&bp, ":"))) /* gid */
119 pw->pw_fields |= _PWF_GID;
121 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
122 if (flags & _PWSCAN_WARN)
123 warnx("no gid for user %s", pw->pw_name);
127 id = strtoul(p, &ep, 10);
128 if (errno == ERANGE) {
129 if (flags & _PWSCAN_WARN)
130 warnx("%s > max gid value (%lu)", p, ULONG_MAX);
134 if (flags & _PWSCAN_WARN)
135 warnx("%s gid is incorrect", p);
138 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
139 warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
140 /* return (0); This should not be fatal! */
144 if (flags & _PWSCAN_MASTER ) {
145 if (!(pw->pw_class = strsep(&bp, ":"))) /* class */
148 pw->pw_fields |= _PWF_CLASS;
150 if (!(p = strsep(&bp, ":"))) /* change */
153 pw->pw_fields |= _PWF_CHANGE;
154 pw->pw_change = atol(p);
156 if (!(p = strsep(&bp, ":"))) /* expire */
159 pw->pw_fields |= _PWF_EXPIRE;
160 pw->pw_expire = atol(p);
162 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
165 pw->pw_fields |= _PWF_GECOS;
167 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
170 pw->pw_fields |= _PWF_DIR;
172 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
176 if (root && *p) { /* empty == /bin/sh */
177 for (setusershell();;) {
178 if (!(sh = getusershell())) {
179 if (flags & _PWSCAN_WARN)
180 warnx("warning, unknown root shell");
189 pw->pw_fields |= _PWF_SHELL;
191 if ((p = strsep(&bp, ":"))) { /* too many */
193 if (flags & _PWSCAN_WARN)
194 warnx("corrupted entry");