tunelp: use symbolic exit values

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/sys-utils/tunelp.c b/sys-utils/tunelp.c
index 53693ecdf13cdba12993eb86049c4eae592ee3d3..be4a6f68341bbbb96f999044def9314e6065cc95 100644 (file)
--- a/sys-utils/tunelp.c
+++ b/sys-utils/tunelp.c
@@ -64,6 +64,9 @@
 #include "nls.h"
 #include "xalloc.h"
 
+#define EXIT_BAD_VALUE 3
+#define EXIT_LP_IO_ERR 4
+
 struct command {
        long op;
        long val;
@@ -91,7 +94,7 @@ static long get_val(char *val)
        long ret;
        if (!(sscanf(val, "%ld", &ret) == 1)) {
                fprintf(stderr, _("%s: bad value\n"), progname);
-               exit(3);
+               exit(EXIT_BAD_VALUE);
        }
        return ret;
 }
@@ -219,7 +222,7 @@ int main(int argc, char **argv)
                case 'v':
                case 'V':
                        print_version(progname);
-                       exit(0);
+                       return EXIT_SUCCESS;
                default:
                        print_usage(progname);
                }
@@ -295,7 +298,7 @@ int main(int argc, char **argv)
                retval = ioctl(fd, LPGETIRQ - offset, &irq);
                if (retval == -1) {
                        perror(_("LPGETIRQ error"));
-                       exit(4);
+                       return EXIT_LP_IO_ERR;
                }
                if (irq == (int)0xdeadbeef)
                        /* up to 1.1.77 will do this */
@@ -308,5 +311,5 @@ int main(int argc, char **argv)
 
        close(fd);
 
-       return 0;
+       return EXIT_SUCCESS;
 }