New functions: process_flags(), check_flags(),
check_perms(). Split out of main().
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nekral-guest
parent
dc1dccd9e2
commit
566b357f99
@ -2,6 +2,8 @@
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* src/chpasswd.c: Before pam_end(), the return value of the previous
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pam API was already checked. No need to validate it again.
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* src/chpasswd.c: New functions: process_flags(), check_flags(),
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check_perms(). Split out of main().
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2007-12-28 Nicolas François <nicolas.francois@centraliens.net>
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215
src/chpasswd.c
215
src/chpasswd.c
@ -61,6 +61,9 @@ static int is_shadow_pwd;
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/* local function prototypes */
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static void usage (void);
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static void process_flags (int argc, char **argv);
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static void check_flags (void);
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static void check_perms (void);
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/*
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* usage - display usage message and exit
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@ -89,113 +92,100 @@ static void usage (void)
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exit (E_USAGE);
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}
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int main (int argc, char **argv)
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/*
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* process_flags - parse the command line options
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*
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* It will not return if an error is encountered.
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*/
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static void process_flags (int argc, char **argv)
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{
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char buf[BUFSIZ];
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char *name;
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char *newpwd;
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char *cp;
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const struct spwd *sp;
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struct spwd newsp;
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const struct passwd *pw;
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struct passwd newpw;
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int errors = 0;
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int line = 0;
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long now = time ((long *) 0) / (24L * 3600L);
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int ok;
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#ifdef USE_PAM
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pam_handle_t *pamh = NULL;
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int retval;
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#endif
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Prog = Basename (argv[0]);
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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{
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int option_index = 0;
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int c;
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static struct option long_options[] = {
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{"crypt-method", required_argument, NULL, 'c'},
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{"encrypted", no_argument, NULL, 'e'},
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{"help", no_argument, NULL, 'h'},
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{"md5", no_argument, NULL, 'm'},
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int option_index = 0;
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int c;
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static struct option long_options[] = {
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{"crypt-method", required_argument, NULL, 'c'},
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{"encrypted", no_argument, NULL, 'e'},
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{"help", no_argument, NULL, 'h'},
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{"md5", no_argument, NULL, 'm'},
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#ifdef USE_SHA_CRYPT
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{"sha-rounds", required_argument, NULL, 's'},
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{"sha-rounds", required_argument, NULL, 's'},
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#endif
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{NULL, 0, NULL, '\0'}
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};
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{NULL, 0, NULL, '\0'}
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};
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while ((c =
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getopt_long (argc, argv,
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while ((c = getopt_long (argc, argv,
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#ifdef USE_SHA_CRYPT
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"c:ehms:",
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"c:ehms:",
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#else
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"c:ehm",
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"c:ehm",
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#endif
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long_options,
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&option_index)) != -1) {
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switch (c) {
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case 'c':
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cflg = 1;
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crypt_method = optarg;
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break;
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case 'e':
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eflg = 1;
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break;
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case 'h':
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usage ();
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break;
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case 'm':
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md5flg = 1;
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break;
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long_options, &option_index)) != -1) {
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switch (c) {
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case 'c':
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cflg = 1;
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crypt_method = optarg;
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break;
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case 'e':
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eflg = 1;
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break;
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case 'h':
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usage ();
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break;
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case 'm':
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md5flg = 1;
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break;
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#ifdef USE_SHA_CRYPT
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case 's':
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sflg = 1;
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if (!getlong(optarg, &sha_rounds)) {
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fprintf (stderr,
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_("%s: invalid numeric argument '%s'\n"),
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Prog, optarg);
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usage ();
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}
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break;
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#endif
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case 0:
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/* long option */
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break;
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default:
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case 's':
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sflg = 1;
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if (!getlong(optarg, &sha_rounds)) {
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fprintf (stderr,
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_("%s: invalid numeric argument '%s'\n"),
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Prog, optarg);
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usage ();
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break;
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}
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break;
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#endif
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case 0:
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/* long option */
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break;
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default:
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usage ();
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break;
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}
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}
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/* validate options */
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check_flags ();
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}
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/*
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* check_flags - check flags and parameters consistency
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*
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* It will not return if an error is encountered.
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*/
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static void check_flags ()
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{
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if (sflg && !cflg) {
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fprintf (stderr,
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_("%s: %s flag is ONLY allowed with the %s flag\n"),
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Prog, "-s", "-c");
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_("%s: %s flag is ONLY allowed with the %s flag\n"),
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Prog, "-s", "-c");
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usage ();
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}
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if ((eflg && (md5flg || cflg)) ||
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(md5flg && cflg)) {
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fprintf (stderr,
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_("%s: the -c, -e, and -m flags are exclusive\n"),
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Prog);
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_("%s: the -c, -e, and -m flags are exclusive\n"),
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Prog);
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usage ();
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}
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if (cflg) {
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if ( 0 != strcmp (crypt_method, "DES")
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&& 0 != strcmp (crypt_method, "MD5")
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&& 0 != strcmp (crypt_method, "NONE")
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if ( (0 != strcmp (crypt_method, "DES"))
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&& (0 != strcmp (crypt_method, "MD5"))
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&& (0 != strcmp (crypt_method, "NONE"))
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#ifdef USE_SHA_CRYPT
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&& 0 != strcmp (crypt_method, "SHA256")
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&& 0 != strcmp (crypt_method, "SHA512")
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&& (0 != strcmp (crypt_method, "SHA256"))
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&& (0 != strcmp (crypt_method, "SHA512"))
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#endif
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) {
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fprintf (stderr,
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@ -204,21 +194,32 @@ int main (int argc, char **argv)
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usage ();
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}
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}
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}
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/*
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* check_perms - check if the caller is allowed to add a group
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*
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* With PAM support, the setuid bit can be set on groupadd to allow
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* non-root users to groups.
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* Without PAM support, only users who can write in the group databases
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* can add groups.
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*
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* It will not return if the user is not allowed.
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*/
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static void check_perms (void)
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{
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#ifdef USE_PAM
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retval = PAM_SUCCESS;
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pam_handle_t *pamh = NULL;
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int retval = PAM_SUCCESS;
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{
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struct passwd *pampw;
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pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
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if (pampw == NULL) {
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retval = PAM_USER_UNKNOWN;
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}
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struct passwd *pampw;
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pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
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if (pampw == NULL) {
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retval = PAM_USER_UNKNOWN;
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}
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if (retval == PAM_SUCCESS) {
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retval = pam_start ("chpasswd", pampw->pw_name,
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&conv, &pamh);
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}
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if (retval == PAM_SUCCESS) {
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retval = pam_start ("chpasswd", pampw->pw_name, &conv, &pamh);
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}
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if (retval == PAM_SUCCESS) {
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@ -240,6 +241,34 @@ int main (int argc, char **argv)
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exit (1);
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}
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#endif /* USE_PAM */
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}
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int main (int argc, char **argv)
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{
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char buf[BUFSIZ];
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char *name;
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char *newpwd;
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char *cp;
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const struct spwd *sp;
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struct spwd newsp;
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const struct passwd *pw;
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struct passwd newpw;
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int errors = 0;
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int line = 0;
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long now = time ((long *) 0) / (24L * 3600L);
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int ok;
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Prog = Basename (argv[0]);
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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process_flags (argc, argv);
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check_perms ();
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/*
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* Lock the password file and open it for reading. This will bring
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