* New function: process_flags() split out of main().
The flags variables are now global. * New functions: check_perms(), update_gecos(), get_old_fields(), and check_fields() split out of main(). * Before pam_end(), the return value of the previous pam API was already checked. No need to validate it again.
This commit is contained in:
nekral-guest
parent
d0b984528a
commit
7279ff37f3
@ -1,3 +1,12 @@
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2007-12-31 Nicolas François <nicolas.francois@centraliens.net>
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* src/chfn.c: New function: process_flags() split out of main().
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The flags variables are now global.
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* src/chfn.c: New functions: check_perms(), update_gecos(),
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get_old_fields(), and check_fields() split out of main().
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* src/chfn.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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2007-12-31 Nicolas François <nicolas.francois@centraliens.net>
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2007-12-31 Nicolas François <nicolas.francois@centraliens.net>
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* src/newusers.c: Compilation fix for PAM support (pamh needs to be
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* src/newusers.c: Compilation fix for PAM support (pamh needs to be
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464
src/chfn.c
464
src/chfn.c
@ -63,6 +63,15 @@ static char workph[BUFSIZ];
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static char homeph[BUFSIZ];
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static char homeph[BUFSIZ];
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static char slop[BUFSIZ];
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static char slop[BUFSIZ];
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static int amroot;
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static int amroot;
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/* Flags */
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static int fflg = 0; /* -f - set full name */
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static int rflg = 0; /* -r - set room number */
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static int wflg = 0; /* -w - set work phone number */
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static int hflg = 0; /* -h - set home phone number */
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static int oflg = 0; /* -o - set other information */
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#ifdef USE_PAM
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static pam_handle_t *pamh = NULL;
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#endif
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/*
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/*
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* External identifiers
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* External identifiers
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@ -73,6 +82,10 @@ static void usage (void);
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static int may_change_field (int);
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static int may_change_field (int);
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static void new_fields (void);
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static void new_fields (void);
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static char *copy_field (char *, char *, char *);
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static char *copy_field (char *, char *, char *);
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static void process_flags (int argc, char **argv);
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static void check_perms (const struct passwd *pw);
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static void update_gecos (const char *user, char *gecos);
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static void get_old_fields (const char *gecos);
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/*
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/*
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* usage - print command line syntax and exit
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* usage - print command line syntax and exit
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@ -197,59 +210,13 @@ static char *copy_field (char *in, char *out, char *extra)
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}
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}
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/*
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/*
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* chfn - change a user's password file information
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* process_flags - parse the command line options
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*
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*
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* This command controls the GECOS field information in the password
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* It will not return if an error is encountered.
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* file entry.
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*
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* The valid options are
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*
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* -f full name
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* -r room number
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* -w work phone number
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* -h home phone number
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* -o other information (*)
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*
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* (*) requires root permission to execute.
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*/
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*/
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int main (int argc, char **argv)
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static void process_flags (int argc, char **argv)
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{
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{
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char *cp; /* temporary character pointer */
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const struct passwd *pw; /* password file entry */
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struct passwd pwent; /* modified password file entry */
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char old_gecos[BUFSIZ]; /* buffer for old GECOS fields */
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char new_gecos[BUFSIZ]; /* buffer for new GECOS fields */
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int flag; /* flag currently being processed */
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int flag; /* flag currently being processed */
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int fflg = 0; /* -f - set full name */
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int rflg = 0; /* -r - set room number */
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int wflg = 0; /* -w - set work phone number */
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int hflg = 0; /* -h - set home phone number */
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int oflg = 0; /* -o - set other information */
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char *user;
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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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sanitize_env ();
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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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* This command behaves different for root and non-root
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* users.
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*/
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amroot = (getuid () == 0);
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/*
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* Get the program name. The program name is used as a
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* prefix to most error messages.
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*/
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Prog = Basename (argv[0]);
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OPENLOG ("chfn");
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/*
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/*
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* The remaining arguments will be processed one by one and executed
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* The remaining arguments will be processed one by one and executed
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@ -309,52 +276,23 @@ int main (int argc, char **argv)
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usage ();
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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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}
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/*
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/*
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* Get the name of the user to check. It is either the command line
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* check_perms - check if the caller is allowed to add a group
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* name, or the name getlogin() returns.
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*
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*/
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* Non-root users are only allowed to change their gecos field.
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if (optind < argc) {
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* (see also may_change_field())
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user = argv[optind];
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*
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pw = xgetpwnam (user);
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* Non-root users must be authenticated.
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if (!pw) {
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*
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fprintf (stderr, _("%s: unknown user %s\n"), Prog,
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* It will not return if the user is not allowed.
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user);
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*/
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exit (E_NOPERM);
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static void check_perms (const struct passwd *pw)
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}
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{
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} else {
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#ifdef USE_PAM
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pw = get_my_pwent ();
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int retval;
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if (!pw) {
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struct passwd *pampw;
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fprintf (stderr,
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_
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("%s: Cannot determine your user name.\n"),
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Prog);
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exit (E_NOPERM);
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}
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user = xstrdup (pw->pw_name);
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}
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#ifdef USE_NIS
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/*
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* Now we make sure this is a LOCAL password entry for this user ...
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*/
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if (__ispwNIS ()) {
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char *nis_domain;
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char *nis_master;
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fprintf (stderr,
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_("%s: cannot change user '%s' on NIS client.\n"),
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Prog, user);
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if (!yp_get_default_domain (&nis_domain) &&
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!yp_master (nis_domain, "passwd.byname", &nis_master)) {
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fprintf (stderr,
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_
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("%s: '%s' is the NIS master for this client.\n"),
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Prog, nis_master);
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}
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exit (E_NOPERM);
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}
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#endif
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#endif
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/*
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/*
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@ -393,17 +331,13 @@ int main (int argc, char **argv)
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#else /* !USE_PAM */
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#else /* !USE_PAM */
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retval = PAM_SUCCESS;
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retval = PAM_SUCCESS;
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{
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pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
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struct passwd *pampw;
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if (pampw == NULL) {
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pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
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retval = PAM_USER_UNKNOWN;
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if (pampw == NULL) {
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}
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retval = PAM_USER_UNKNOWN;
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}
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if (retval == PAM_SUCCESS) {
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if (retval == PAM_SUCCESS) {
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retval = pam_start ("chfn", pampw->pw_name,
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retval = pam_start ("chfn", pampw->pw_name, &conv, &pamh);
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&conv, &pamh);
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}
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}
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}
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if (retval == PAM_SUCCESS) {
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if (retval == PAM_SUCCESS) {
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@ -425,98 +359,17 @@ int main (int argc, char **argv)
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exit (E_NOPERM);
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exit (E_NOPERM);
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}
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}
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#endif /* USE_PAM */
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#endif /* USE_PAM */
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}
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/*
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/*
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* Now get the full name. It is the first comma separated field in
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* update_gecos - update the gecos fields in the password database
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* the GECOS field.
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*
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*/
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* Commit the user's entry after changing her gecos field.
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STRFCPY (old_gecos, pw->pw_gecos);
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*/
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cp = copy_field (old_gecos, fflg ? (char *) 0 : fullnm, slop);
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static void update_gecos (const char *user, char *gecos)
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{
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/*
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const struct passwd *pw; /* The user's password file entry */
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* Now get the room number. It is the next comma separated field,
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struct passwd pwent; /* modified password file entry */
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* if there is indeed one.
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*/
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if (cp)
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cp = copy_field (cp, rflg ? (char *) 0 : roomno, slop);
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/*
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* Now get the work phone number. It is the third field.
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*/
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if (cp)
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cp = copy_field (cp, wflg ? (char *) 0 : workph, slop);
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/*
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* Now get the home phone number. It is the fourth field.
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*/
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if (cp)
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cp = copy_field (cp, hflg ? (char *) 0 : homeph, slop);
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/*
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* Anything left over is "slop".
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*/
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if (cp && !oflg) {
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if (slop[0])
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strcat (slop, ",");
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strcat (slop, cp);
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}
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/*
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* If none of the fields were changed from the command line, let the
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* user interactively change them.
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*/
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if (!fflg && !rflg && !wflg && !hflg && !oflg) {
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printf (_("Changing the user information for %s\n"), user);
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new_fields ();
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}
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/*
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* Check all of the fields for valid information
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*/
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if (valid_field (fullnm, ":,=")) {
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fprintf (stderr, _("%s: invalid name: '%s'\n"), Prog, fullnm);
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closelog ();
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exit (E_NOPERM);
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}
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if (valid_field (roomno, ":,=")) {
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fprintf (stderr, _("%s: invalid room number: '%s'\n"),
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Prog, roomno);
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closelog ();
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exit (E_NOPERM);
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}
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if (valid_field (workph, ":,=")) {
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fprintf (stderr, _("%s: invalid work phone: '%s'\n"),
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Prog, workph);
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closelog ();
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exit (E_NOPERM);
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}
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if (valid_field (homeph, ":,=")) {
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fprintf (stderr, _("%s: invalid home phone: '%s'\n"),
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Prog, homeph);
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closelog ();
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exit (E_NOPERM);
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}
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if (valid_field (slop, ":")) {
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fprintf (stderr,
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_("%s: '%s' contains illegal characters\n"),
|
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Prog, slop);
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closelog ();
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exit (E_NOPERM);
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}
|
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|
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/*
|
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* Build the new GECOS field by plastering all the pieces together,
|
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* if they will fit ...
|
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*/
|
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if (strlen (fullnm) + strlen (roomno) + strlen (workph) +
|
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strlen (homeph) + strlen (slop) > (unsigned int) 80) {
|
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fprintf (stderr, _("%s: fields too long\n"), Prog);
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closelog ();
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exit (E_NOPERM);
|
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}
|
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snprintf (new_gecos, sizeof new_gecos, "%s,%s,%s,%s%s%s",
|
|
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fullnm, roomno, workph, homeph, slop[0] ? "," : "", slop);
|
|
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|
|
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/*
|
/*
|
||||||
* Before going any further, raise the ulimit to prevent colliding
|
* Before going any further, raise the ulimit to prevent colliding
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@ -571,7 +424,7 @@ int main (int argc, char **argv)
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* fields remain unchanged.
|
* fields remain unchanged.
|
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*/
|
*/
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pwent = *pw;
|
pwent = *pw;
|
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pwent.pw_gecos = new_gecos;
|
pwent.pw_gecos = gecos;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Update the passwd file entry. If there is a DBM file, update that
|
* Update the passwd file entry. If there is a DBM file, update that
|
||||||
@ -601,13 +454,228 @@ int main (int argc, char **argv)
|
|||||||
closelog ();
|
closelog ();
|
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exit (E_NOPERM);
|
exit (E_NOPERM);
|
||||||
}
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* get_old_fields - parse the old gecos and use the old value for the fields
|
||||||
|
* which are not set on the command line
|
||||||
|
*/
|
||||||
|
static void get_old_fields (const char *gecos)
|
||||||
|
{
|
||||||
|
char *cp; /* temporary character pointer */
|
||||||
|
char old_gecos[BUFSIZ]; /* buffer for old GECOS fields */
|
||||||
|
STRFCPY (old_gecos, gecos);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Now get the full name. It is the first comma separated field in
|
||||||
|
* the GECOS field.
|
||||||
|
*/
|
||||||
|
cp = copy_field (old_gecos, fflg ? (char *) 0 : fullnm, slop);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Now get the room number. It is the next comma separated field,
|
||||||
|
* if there is indeed one.
|
||||||
|
*/
|
||||||
|
if (cp)
|
||||||
|
cp = copy_field (cp, rflg ? (char *) 0 : roomno, slop);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Now get the work phone number. It is the third field.
|
||||||
|
*/
|
||||||
|
if (cp)
|
||||||
|
cp = copy_field (cp, wflg ? (char *) 0 : workph, slop);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Now get the home phone number. It is the fourth field.
|
||||||
|
*/
|
||||||
|
if (cp)
|
||||||
|
cp = copy_field (cp, hflg ? (char *) 0 : homeph, slop);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Anything left over is "slop".
|
||||||
|
*/
|
||||||
|
if (cp && !oflg) {
|
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|
if (slop[0])
|
||||||
|
strcat (slop, ",");
|
||||||
|
|
||||||
|
strcat (slop, cp);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* check_fields - check all of the fields for valid information
|
||||||
|
*
|
||||||
|
* It will not return if a field is not valid.
|
||||||
|
*/
|
||||||
|
static void check_fields (void)
|
||||||
|
{
|
||||||
|
if (valid_field (fullnm, ":,=")) {
|
||||||
|
fprintf (stderr, _("%s: invalid name: '%s'\n"), Prog, fullnm);
|
||||||
|
closelog ();
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
if (valid_field (roomno, ":,=")) {
|
||||||
|
fprintf (stderr, _("%s: invalid room number: '%s'\n"),
|
||||||
|
Prog, roomno);
|
||||||
|
closelog ();
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
if (valid_field (workph, ":,=")) {
|
||||||
|
fprintf (stderr, _("%s: invalid work phone: '%s'\n"),
|
||||||
|
Prog, workph);
|
||||||
|
closelog ();
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
if (valid_field (homeph, ":,=")) {
|
||||||
|
fprintf (stderr, _("%s: invalid home phone: '%s'\n"),
|
||||||
|
Prog, homeph);
|
||||||
|
closelog ();
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
if (valid_field (slop, ":")) {
|
||||||
|
fprintf (stderr,
|
||||||
|
_("%s: '%s' contains illegal characters\n"),
|
||||||
|
Prog, slop);
|
||||||
|
closelog ();
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* chfn - change a user's password file information
|
||||||
|
*
|
||||||
|
* This command controls the GECOS field information in the password
|
||||||
|
* file entry.
|
||||||
|
*
|
||||||
|
* The valid options are
|
||||||
|
*
|
||||||
|
* -f full name
|
||||||
|
* -r room number
|
||||||
|
* -w work phone number
|
||||||
|
* -h home phone number
|
||||||
|
* -o other information (*)
|
||||||
|
*
|
||||||
|
* (*) requires root permission to execute.
|
||||||
|
*/
|
||||||
|
int main (int argc, char **argv)
|
||||||
|
{
|
||||||
|
const struct passwd *pw; /* password file entry */
|
||||||
|
char new_gecos[BUFSIZ]; /* buffer for new GECOS fields */
|
||||||
|
char *user;
|
||||||
|
|
||||||
|
sanitize_env ();
|
||||||
|
setlocale (LC_ALL, "");
|
||||||
|
bindtextdomain (PACKAGE, LOCALEDIR);
|
||||||
|
textdomain (PACKAGE);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* This command behaves different for root and non-root
|
||||||
|
* users.
|
||||||
|
*/
|
||||||
|
amroot = (getuid () == 0);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Get the program name. The program name is used as a
|
||||||
|
* prefix to most error messages.
|
||||||
|
*/
|
||||||
|
Prog = Basename (argv[0]);
|
||||||
|
|
||||||
|
OPENLOG ("chfn");
|
||||||
|
|
||||||
|
/* parse the command line options */
|
||||||
|
process_flags (argc, argv);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Get the name of the user to check. It is either the command line
|
||||||
|
* name, or the name getlogin() returns.
|
||||||
|
*/
|
||||||
|
if (optind < argc) {
|
||||||
|
user = argv[optind];
|
||||||
|
pw = xgetpwnam (user);
|
||||||
|
if (!pw) {
|
||||||
|
fprintf (stderr, _("%s: unknown user %s\n"), Prog,
|
||||||
|
user);
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
pw = get_my_pwent ();
|
||||||
|
if (!pw) {
|
||||||
|
fprintf (stderr,
|
||||||
|
_
|
||||||
|
("%s: Cannot determine your user name.\n"),
|
||||||
|
Prog);
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
user = xstrdup (pw->pw_name);
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef USE_NIS
|
||||||
|
/*
|
||||||
|
* Now we make sure this is a LOCAL password entry for this user ...
|
||||||
|
*/
|
||||||
|
if (__ispwNIS ()) {
|
||||||
|
char *nis_domain;
|
||||||
|
char *nis_master;
|
||||||
|
|
||||||
|
fprintf (stderr,
|
||||||
|
_("%s: cannot change user '%s' on NIS client.\n"),
|
||||||
|
Prog, user);
|
||||||
|
|
||||||
|
if (!yp_get_default_domain (&nis_domain) &&
|
||||||
|
!yp_master (nis_domain, "passwd.byname", &nis_master)) {
|
||||||
|
fprintf (stderr,
|
||||||
|
_
|
||||||
|
("%s: '%s' is the NIS master for this client.\n"),
|
||||||
|
Prog, nis_master);
|
||||||
|
}
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Check that the caller is allowed to change the gecos of the
|
||||||
|
* specified user */
|
||||||
|
check_perms (pw);
|
||||||
|
|
||||||
|
/* If some fields were not set on the command line, load the value from
|
||||||
|
* the old gecos fields. */
|
||||||
|
get_old_fields (pw->pw_gecos);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If none of the fields were changed from the command line, let the
|
||||||
|
* user interactively change them.
|
||||||
|
*/
|
||||||
|
if (!fflg && !rflg && !wflg && !hflg && !oflg) {
|
||||||
|
printf (_("Changing the user information for %s\n"), user);
|
||||||
|
new_fields ();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Check all of the fields for valid information
|
||||||
|
*/
|
||||||
|
check_fields ();
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Build the new GECOS field by plastering all the pieces together,
|
||||||
|
* if they will fit ...
|
||||||
|
*/
|
||||||
|
if (strlen (fullnm) + strlen (roomno) + strlen (workph) +
|
||||||
|
strlen (homeph) + strlen (slop) > (unsigned int) 80) {
|
||||||
|
fprintf (stderr, _("%s: fields too long\n"), Prog);
|
||||||
|
closelog ();
|
||||||
|
exit (E_NOPERM);
|
||||||
|
}
|
||||||
|
snprintf (new_gecos, sizeof new_gecos, "%s,%s,%s,%s%s%s",
|
||||||
|
fullnm, roomno, workph, homeph, slop[0] ? "," : "", slop);
|
||||||
|
|
||||||
|
/* Rewrite the user's gecos in the passwd file */
|
||||||
|
update_gecos (user, new_gecos);
|
||||||
|
|
||||||
SYSLOG ((LOG_INFO, "changed user `%s' information", user));
|
SYSLOG ((LOG_INFO, "changed user `%s' information", user));
|
||||||
|
|
||||||
nscd_flush_cache ("passwd");
|
nscd_flush_cache ("passwd");
|
||||||
|
|
||||||
#ifdef USE_PAM
|
#ifdef USE_PAM
|
||||||
if (retval == PAM_SUCCESS)
|
pam_end (pamh, PAM_SUCCESS);
|
||||||
pam_end (pamh, PAM_SUCCESS);
|
|
||||||
#endif /* USE_PAM */
|
#endif /* USE_PAM */
|
||||||
|
|
||||||
closelog ();
|
closelog ();
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user