agetty: Use EXIT_* and add noreturn attribute

Signed-off-by: Marek Polacek <mmpolacek@gmail.com>

diff --git a/login-utils/agetty.c b/login-utils/agetty.c
index b1cfa5a53cf03ce8938a4342ab292d24991c15f5..8793465406ef1c5d3d4c0cd6c07ddcb187467aab 100644 (file)
--- a/login-utils/agetty.c
+++ b/login-utils/agetty.c
@@ -360,7 +360,6 @@ main(argc, argv)
 
     (void) execl(options.login, options.login, "--", logname, NULL);
     error(_("%s: can't exec %s: %m"), options.tty, options.login);
-    exit(0);  /* quiet GCC */
 }
 
 /* parse-args - parse command-line arguments */
@@ -1050,13 +1049,13 @@ char   *get_logname(op, cp, tp)
 
            if (read(0, &c, 1) < 1) {
                if (errno == EINTR || errno == EIO)
-                   exit(0);
+                   exit(EXIT_SUCCESS);
                error(_("%s: read: %m"), op->tty);
            }
            /* Do BREAK handling elsewhere. */
 
            if ((c == 0) && op->numspeed > 1)
-               return (0);
+               return EXIT_SUCCESS;
            /* Do parity bit handling. */
 
            if (op->eightbits) {
@@ -1093,7 +1092,7 @@ char   *get_logname(op, cp, tp)
                }
                break;
            case CTL('D'):
-               exit(0);
+               exit(EXIT_SUCCESS);
            default:
                if (!isascii(ascval) || !isprint(ascval)) {
                     /* ignore garbage characters */ ;
@@ -1113,7 +1112,7 @@ char   *get_logname(op, cp, tp)
            if (isupper(*bp))
                *bp = tolower(*bp);             /* map name to lower case */
     }
-    return (logname);
+    return logname;
 }
 
 /* termio_final - set the final tty mode bits */
@@ -1201,11 +1200,11 @@ caps_lock(s)
 
     for (capslock = 0; *s; s++) {
        if (islower(*s))
-           return (0);
+           return EXIT_SUCCESS;
        if (capslock == 0)
            capslock = isupper(*s);
     }
-    return (capslock);
+    return capslock;
 }
 
 /* bcode - convert speed string to speed code; return 0 on failure */
@@ -1218,17 +1217,16 @@ bcode(s)
 
     for (sp = speedtab; sp->speed; sp++)
        if (sp->speed == speed)
-           return (sp->code);
-    return (0);
+           return sp->code;
+    return 0;
 }
 
 /* usage - explain */
 
-void
-usage()
+void __attribute__((__noreturn__)) usage(void)
 {
     fprintf(stderr, _("Usage: %s [-8hiLmsUw] [-l login_program] [-t timeout] [-I initstring] [-H login_host] baud_rate,... line [termtype]\nor\t[-hiLmw] [-l login_program] [-t timeout] [-I initstring] [-H login_host] line baud_rate,... [termtype]\n"), progname);
-    exit(1);
+    exit(EXIT_FAILURE);
 }
 
 /* error - report errors to console or syslog; only understands %s and %m */