Use symbolic constants in exit(2) calls

man2/select_tut.2

@@ -458,7 +458,7 @@ main(int argc, char **argv)
         fprintf(stderr,
                  "Usage\\n\\tfwd <listen-port> "
                  "<forward-to-port> <forward-to-ip-address>\\n");
-        exit(1);
+        exit(EXIT_FAILURE);
     }
 
     signal(SIGPIPE, SIG_IGN);
@@ -467,7 +467,7 @@ main(int argc, char **argv)
 
     h = listen_socket(atoi(argv[1]));
     if (h < 0)
-        exit(1);
+        exit(EXIT_FAILURE);
 
     for (;;) {
         int r, nfds = 0;
@@ -510,7 +510,7 @@ main(int argc, char **argv)
             continue;
         if (r < 0) {
             perror("select()");
-            exit(1);
+            exit(EXIT_FAILURE);
         }
         if (FD_ISSET(h, &rd)) {
             unsigned int l;

man3/dlopen.3

@@ -377,7 +377,7 @@ main(int argc, char **argv)
     handle = dlopen("libm.so", RTLD_LAZY);
     if (!handle) {
         fprintf(stderr, "%s\en", dlerror());
-        exit(1);
+        exit(EXIT_FAILURE);
     }
 
     dlerror();    /* Clear any existing error */
@@ -386,7 +386,7 @@ main(int argc, char **argv)
     *(void **) (&cosine) = dlsym(handle, "cos");
     if ((error = dlerror()) != NULL)  {
         fprintf(stderr, "%s\en", error);
-        exit(1);
+        exit(EXIT_FAILURE);
     }
 
     printf("%f\en", (*cosine)(2.0));

man3/getgrent_r.3

@@ -138,7 +138,7 @@ main(void)
 .\"               if (i == ENOENT)
 .\"                     break;
 .\"               printf("getgrent_r: %s", strerror(i));
-.\"               exit(1);
+.\"               exit(EXIT_FAILURE);
 .\"         }
 .SH "CONFORMING TO"
 These functions are GNU extensions, done in a style resembling

man3/getopt.3

@@ -428,7 +428,7 @@ main(int argc, char **argv)
         printf("\\n");
     }
 
-    exit(0);
+    exit(EXIT_SUCCESS);
 }
 .fi
 .SH BUGS

man3/getpwent_r.3

@@ -135,7 +135,7 @@ main(void)
 .\"               if (i == ENOENT)
 .\"                     break;
 .\"               printf("getpwent_r: %s", strerror(i));
-.\"               exit(1);
+.\"               exit(EXIT_SUCCESS);
 .\"         }
 .SH "CONFORMING TO"
 These functions are GNU extensions, done in a style resembling

man3/hsearch.3

@@ -197,7 +197,7 @@ main(void)
         /* there should be no failures */
         if (ep == NULL) {
             fprintf(stderr, "entry failed\\n");
-            exit(1);
+            exit(EXIT_FAILURE);
         }
     }
     for (i = 22; i < 26; i++) {

man3/tsearch.3

@@ -195,7 +195,7 @@ xmalloc(unsigned n)
     if (p)
         return p;
     fprintf(stderr, "insufficient memory\\n");
-    exit(1);
+    exit(EXIT_FAILURE);
 }
 
 int
@@ -241,7 +241,7 @@ main(void)
         *ptr = rand() & 0xff;
         val = tsearch((void *) ptr, &root, compare);
         if (val == NULL)
-            exit(1);
+            exit(EXIT_FAILURE);
     }
     twalk(root, action);
     return 0;