Small changes in EXAMPLE program.

man2/bind.2

@@ -264,6 +264,8 @@ domain, and accept connections:
 #define MY_SOCK_PATH "/somepath"
 #define LISTEN_BACKLOG 50
 
+#define die(msg) do { perror(msg); exit(EXIT_FAILURE); } while (0)
+
 int
 main(int argc, char *argv[])
 {
@@ -272,10 +274,8 @@ main(int argc, char *argv[])
     socklen_t peer_addr_size;
 
     sfd = socket(AF_UNIX, SOCK_STREAM, 0);
-    if (sfd == -1) {
-        perror("socket");
-        exit(EXIT_FAILURE);
-    }
+    if (sfd == -1)
+        die("socket");
 
     memset(&my_addr, 0, sizeof(struct sockaddr_un));
                         /* Clear structure */
@@ -284,25 +284,20 @@ main(int argc, char *argv[])
             sizeof(my_addr.sun_path) - 1);
 
     if (bind(sfd, (struct sockaddr *) &my_addr,
-            sizeof(struct sockaddr_un)) == -1) {
-        perror("bind");
-        exit(EXIT_FAILURE);
-    }
+            sizeof(struct sockaddr_un)) == -1)
+        die("bind");
     
-    if (listen(sfd, LISTEN_BACKLOG) == -1) {
-        perror("listen");
-        exit(EXIT_FAILURE);
-    }
+    if (listen(sfd, LISTEN_BACKLOG) == -1)
+        die("listen");
 
     /* Now we can accept incoming connections one 
        at a time using accept(2) */
 
     peer_addr_size = sizeof(struct sockaddr_un);
     cfd = accept(sfd, (struct sockaddr *) &peer_addr,
-                 &peer_addr_size) == -1) {
-        perror("accept");
-        exit(EXIT_FAILURE);
-    }
+                 &peer_addr_size)
+    if (cfd == -1)
+        die("accept");
 }
 .fi
 .in -0.25in

man2/mprotect.2

@@ -159,6 +159,8 @@ Got SIGSEGV at address: 0x804e000
 #include <errno.h>
 #include <sys/mman.h>
 
+#define die(msg) do { perror(msg); exit(EXIT_FAILURE); } while (0)
+
 char *buffer;
 
 static void
@@ -179,33 +181,25 @@ main(int argc, char *argv[])
     sa.sa_flags = SA_SIGINFO;
     sigemptyset(&sa.sa_mask);
     sa.sa_sigaction = handler;
-    if (sigaction(SIGSEGV, &sa, NULL) == -1) {
-        perror("sigaction");
-        exit(EXIT_FAILURE);
-    }
+    if (sigaction(SIGSEGV, &sa, NULL) == -1)
+        die("sigaction");
 
     pagesize = sysconf(_SC_PAGE_SIZE);
-    if (pagesize == -1) {
-        perror("sysconf");
-        exit(EXIT_FAILURE);
-    }
+    if (pagesize == -1)
+        die("sysconf");
 
     /* Allocate a buffer aligned on a page boundary; 
        initial protection is PROT_READ | PROT_WRITE */
 
     buffer = memalign(pagesize, 4 * pagesize);
-    if (buffer == NULL) {
-        perror("memalign");
-        exit(EXIT_FAILURE);
-    }
+    if (buffer == NULL)
+        die("memalign");
 
     printf("Start of region:        0x%lx\\n", (long) buffer);
 
     if (mprotect(buffer + pagesize * 2, pagesize, 
-                PROT_NONE) == -1) {
-        perror("mprotect");
-        exit(EXIT_FAILURE);
-    }
+                PROT_NONE) == -1)
+        die("mprotect");
 
     for (p = buffer ; ; )
         *(p++) = 'a';

man3/fmemopen.3

@@ -166,6 +166,8 @@ size=11; ptr=1 529 1849
 #include <stdio.h>
 #include <stdlib.h>
 
+#define die(msg) do { perror(msg); exit(EXIT_FAILURE); } while (0)
+
 int
 main(int argc, char *argv[])
 {
@@ -177,16 +179,12 @@ main(int argc, char *argv[])
     assert(argc == 2);
 
     in = fmemopen(argv[1], strlen(argv[1]), "r");
-    if (in == NULL) {
-        perror("fmemopen");
-        exit(EXIT_FAILURE);
-    }
+    if (in == NULL)
+        die("fmemopen");
 
     out = open_memstream(&ptr, &size);
-    if (out == NULL) {
-        perror("fmemopen");
-        exit(EXIT_FAILURE);
-    }
+    if (out == NULL)
+        die("fmemopen");
 
     for (;;) {
         s = fscanf(in, "%d", &v);
@@ -194,10 +192,8 @@ main(int argc, char *argv[])
             break;
 
         s = fprintf(out, "%d ", v * v);
-        if (s == -1) {
-            perror("fprintf");
-            exit(EXIT_FAILURE);
-        }
+        if (s == -1)
+            die("fprintf");
     }
     fclose(in);
     fclose(out);