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33 * $FreeBSD: src/lib/libc/gen/pw_scan.c,v 1.25 2004/01/18 21:33:25 charnier Exp $
34 * $DragonFly: src/lib/libutil/pw_scan.c,v 1.2 2005/08/01 20:59:46 joerg Exp $
38 * This module is used to "verify" password entries by chpass(1) and
42 #include <sys/param.h>
56 * Some software assumes that IDs are short. We should emit warnings
57 * for id's which cannot be stored in a short, but we are more liberal
58 * by default, warning for IDs greater than USHRT_MAX.
60 * If pw_big_ids_warning is -1 on entry to pw_scan(), it will be set based
61 * on the existence of PW_SCAN_BIG_IDS in the environment.
63 static int pw_big_ids_warning = -1;
66 __pw_scan(char *bp, struct passwd *pw, int flags)
72 if (pw_big_ids_warning == -1)
73 pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
76 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
78 root = !strcmp(pw->pw_name, "root");
79 if (pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
80 pw->pw_fields |= _PWF_NAME;
82 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
85 pw->pw_fields |= _PWF_PASSWD;
87 if (!(p = strsep(&bp, ":"))) /* uid */
90 pw->pw_fields |= _PWF_UID;
92 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
93 if (flags & _PWSCAN_WARN)
94 warnx("no uid for user %s", pw->pw_name);
98 id = strtoul(p, &ep, 10);
99 if (errno == ERANGE) {
100 if (flags & _PWSCAN_WARN)
101 warnx("%s > max uid value (%lu)", p, ULONG_MAX);
105 if (flags & _PWSCAN_WARN)
106 warnx("%s uid is incorrect", p);
110 if (flags & _PWSCAN_WARN)
111 warnx("root uid should be 0");
114 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
115 warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
116 /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
120 if (!(p = strsep(&bp, ":"))) /* gid */
123 pw->pw_fields |= _PWF_GID;
125 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
126 if (flags & _PWSCAN_WARN)
127 warnx("no gid for user %s", pw->pw_name);
131 id = strtoul(p, &ep, 10);
132 if (errno == ERANGE) {
133 if (flags & _PWSCAN_WARN)
134 warnx("%s > max gid value (%lu)", p, ULONG_MAX);
138 if (flags & _PWSCAN_WARN)
139 warnx("%s gid is incorrect", p);
142 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
143 warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
144 /* return (0); This should not be fatal! */
148 if (flags & _PWSCAN_MASTER ) {
149 if (!(pw->pw_class = strsep(&bp, ":"))) /* class */
152 pw->pw_fields |= _PWF_CLASS;
154 if (!(p = strsep(&bp, ":"))) /* change */
157 pw->pw_fields |= _PWF_CHANGE;
158 pw->pw_change = atol(p);
160 if (!(p = strsep(&bp, ":"))) /* expire */
163 pw->pw_fields |= _PWF_EXPIRE;
164 pw->pw_expire = atol(p);
166 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
169 pw->pw_fields |= _PWF_GECOS;
171 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
174 pw->pw_fields |= _PWF_DIR;
176 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
180 if (root && *p) { /* empty == /bin/sh */
181 for (setusershell();;) {
182 if (!(sh = getusershell())) {
183 if (flags & _PWSCAN_WARN)
184 warnx("warning, unknown root shell");
193 pw->pw_fields |= _PWF_SHELL;
195 if ((p = strsep(&bp, ":"))) { /* too many */
197 if (flags & _PWSCAN_WARN)
198 warnx("corrupted entry");