*
* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
- *
*
*/
#include <unistd.h>
#include <pwd.h>
#include <errno.h>
+#include <err.h>
#include <ctype.h>
#include <getopt.h>
+
#include "my_crypt.h"
#include "islocal.h"
#include "setpwnam.h"
#include "strutils.h"
#include "nls.h"
#include "env.h"
+#include "xalloc.h"
#ifdef HAVE_LIBSELINUX
#include <selinux/selinux.h>
if ((_rc) != PAM_SUCCESS) { \
fprintf(stderr, "\n%s\n", pam_strerror((_ph), (_rc))); \
pam_end((_ph), (_rc)); \
- exit(1); \
+ exit(EXIT_FAILURE); \
} \
} while(0)
};
static boolean parse_argv (int argc, char *argv[], struct finfo *pinfo);
-static void usage (FILE *fp);
static void parse_passwd (struct passwd *pw, struct finfo *pinfo);
static void ask_info (struct finfo *oldfp, struct finfo *newfp);
static char *prompt (char *question, char *def_val);
static int check_gecos_string (char *msg, char *gecos);
static boolean set_changed_data (struct finfo *oldfp, struct finfo *newfp);
static int save_new_data (struct finfo *pinfo);
-static void *xmalloc (int bytes);
-
-#define memzero(ptr, size) memset((char *) ptr, 0, size)
/* we do not accept gecos field sizes longer than MAX_FIELD_SIZE */
#define MAX_FIELD_SIZE 256
+static void __attribute__((__noreturn__)) usage(FILE *fp)
+{
+ fprintf (fp, _("Usage: %s [ -f full-name ] [ -o office ] "), whoami);
+ fprintf (fp, _("[ -p office-phone ]\n [ -h home-phone ] "));
+ fprintf (fp, _("[ --help ] [ --version ]\n"));
+
+ exit(fp == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
int main (int argc, char **argv) {
char *cp;
uid_t uid;
* specified for.
*/
uid = getuid ();
- memzero (&oldf, sizeof (oldf));
- memzero (&newf, sizeof (newf));
+ memset(&oldf, 0, sizeof(oldf));
+ memset(&newf, 0, sizeof (newf));
interactive = parse_argv (argc, argv, &newf);
if (! newf.username) {
parse_passwd (getpwuid (uid), &oldf);
- if (! oldf.username) {
- fprintf (stderr, _("%s: you (user %d) don't exist.\n"), whoami, uid);
- return (-1); }
+ if (! oldf.username)
+ errx(EXIT_FAILURE, _("%s: you (user %d) don't exist."), whoami, uid);
}
else {
parse_passwd (getpwnam (newf.username), &oldf);
- if (! oldf.username) {
- cp = newf.username;
- fprintf (stderr, _("%s: user \"%s\" does not exist.\n"), whoami, cp);
- return (-1); }
+ if (! oldf.username)
+ errx(EXIT_FAILURE, _("%s: user \"%s\" does not exist."),
+ whoami, newf.username);
}
- if (!(is_local(oldf.username))) {
- fprintf (stderr, _("%s: can only change local entries.\n"), whoami);
- exit(1);
- }
+ if (!(is_local(oldf.username)))
+ errx(EXIT_FAILURE, _("can only change local entries"));
#ifdef HAVE_LIBSELINUX
if (is_selinux_enabled() > 0) {
if (checkAccess(oldf.username,PASSWD__CHFN)!=0) {
security_context_t user_context;
if (getprevcon(&user_context) < 0)
- user_context=(security_context_t) strdup(_("Unknown user context"));
- fprintf(stderr, _("%s: %s is not authorized to change the finger info of %s\n"),
- whoami, user_context, oldf.username);
- freecon(user_context);
- exit(1);
+ user_context = NULL;
+
+ errx(EXIT_FAILURE, _("%s: %s is not authorized to change "
+ "the finger info of %s"),
+ whoami, user_context ? : _("Unknown user context"),
+ oldf.username);
}
}
- if (setupDefaultContext("/etc/passwd") != 0) {
- fprintf(stderr,_("%s: Can't set default context for /etc/passwd"),
- whoami);
- exit(1);
- }
+ if (setupDefaultContext("/etc/passwd"))
+ errx(EXIT_FAILURE, _("can't set default context for /etc/passwd"));
}
#endif
/* Reality check */
if (uid != 0 && uid != oldf.pw->pw_uid) {
errno = EACCES;
- perror (whoami);
- return (-1);
+ err(EXIT_FAILURE, NULL);
}
printf (_("Changing finger information for %s.\n"), oldf.username);
int retcode;
retcode = pam_start("chfn", oldf.username, &conv, &pamh);
- if(retcode != PAM_SUCCESS) {
- fprintf(stderr, _("%s: PAM failure, aborting: %s\n"),
+ if(retcode != PAM_SUCCESS)
+ errx(EXIT_FAILURE, _("%s: PAM failure, aborting: %s"),
whoami, pam_strerror(pamh, retcode));
- exit(1);
- }
retcode = pam_authenticate(pamh, 0);
PAM_FAIL_CHECK(pamh, retcode);
if(strncmp(oldf.pw->pw_passwd,
crypt(pwdstr, oldf.pw->pw_passwd), 13)) {
puts(_("Incorrect password."));
- exit(1);
+ exit(EXIT_FAILURE);
}
}
# endif /* HAVE_SECURITY_PAM_MISC_H */
if (! set_changed_data (&oldf, &newf)) {
printf (_("Finger information not changed.\n"));
- return 0;
+ return EXIT_SUCCESS;
}
status = save_new_data (&oldf);
return status;
/* version? output version and exit. */
if (c == 'v') {
printf ("%s\n", PACKAGE_STRING);
- exit (0);
+ exit (EXIT_SUCCESS);
}
- if (c == 'u') {
+ if (c == 'u')
usage (stdout);
- exit (0);
- }
/* all other options must have an argument. */
- if (! optarg) {
+ if (! optarg)
usage (stderr);
- exit (-1);
- }
/* ok, we were given an argument */
info_given = true;
status = 0;
break;
default:
usage (stderr);
- status = (-1);
}
if (status < 0) exit (status);
}
/* done parsing arguments. check for a username. */
if (optind < argc) {
- if (optind + 1 < argc) {
+ if (optind + 1 < argc)
usage (stderr);
- exit (-1);
- }
pinfo->username = argv[optind];
}
return (! info_given);
}
-/*
- * usage () --
- * print out a usage message.
- */
-static void usage (fp)
- FILE *fp;
-{
- fprintf (fp, _("Usage: %s [ -f full-name ] [ -o office ] "), whoami);
- fprintf (fp, _("[ -p office-phone ]\n [ -h home-phone ] "));
- fprintf (fp, _("[ --help ] [ --version ]\n"));
-}
-
/*
* parse_passwd () --
* take a struct password and fill in the fields of the
pinfo->pw = pw;
pinfo->username = pw->pw_name;
/* use pw_gecos - we take a copy since PAM destroys the original */
- gecos = strdup(pw->pw_gecos);
+ gecos = xstrdup(pw->pw_gecos);
cp = (gecos ? gecos : "");
pinfo->full_name = cp;
cp = strchr (cp, ',');
*buf = 0;
if (fgets (buf, sizeof (buf), stdin) == NULL) {
printf (_("\nAborted.\n"));
- exit (-1);
+ exit (EXIT_FAILURE);
}
/* remove the newline at the end of buf. */
ans = buf;
if (c == ',' || c == ':' || c == '=' || c == '"' || c == '\n') {
if (msg) printf ("%s: ", msg);
printf (_("'%c' is not allowed.\n"), c);
- return (-1);
+ return -1;
}
if (iscntrl (c)) {
if (msg) printf ("%s: ", msg);
printf (_("Control characters are not allowed.\n"));
- return (-1);
+ return -1;
}
}
- return (0);
+ return 0;
}
/*
if (setpwnam (pinfo->pw) < 0) {
perror ("setpwnam");
printf( _("Finger information *NOT* changed. Try again later.\n" ));
- return (-1);
+ return -1;
}
printf (_("Finger information changed.\n"));
return 0;
}
-
-/*
- * xmalloc () -- malloc that never fails.
- */
-static void *xmalloc (bytes)
- int bytes;
-{
- void *vp;
-
- vp = malloc (bytes);
- if (! vp && bytes > 0) {
- perror (_("malloc failed"));
- exit (-1);
- }
- return vp;
-}
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