smtp-dummy: Prefer return rather than exit() in main.

The main() function should be written as just another function with a
return value. This allows for more reliable code reuse. Imagine that
main() grows too large and needs to be factored into multiple
functions. At that point, exit() is probably the wrong thing, yet can
also be hard to notice as it's in less-frequently-tested exceptional
cases.

1 files changed, 9 insertions, 9 deletions

diff --git a/test/smtp-dummy.c b/test/smtp-dummy.c
index 133d6c4e..9da8202f 100644
--- a/test/smtp-dummy.c
+++ b/test/smtp-dummy.c
@@ -127,7 +127,7 @@ main (int argc, char *argv[])
 
 	if (argc != 2) {
 		fprintf (stderr, "Usage: %s <output-file>\n", argv[0]);
-		exit (1);
+		return 1;
 	}
 
 	output_filename = argv[1];
@@ -135,14 +135,14 @@ main (int argc, char *argv[])
 	if (output == NULL) {
 		fprintf (stderr, "Failed to open %s for writing: %s\n",
 			 output_filename, strerror (errno));
-		exit (1);
+		return 1;
 	}
 
 	sock = socket (AF_INET, SOCK_STREAM, 0);
 	if (sock == -1) {
 		fprintf (stderr, "Error: socket() failed: %s\n",
 			 strerror (errno));
-		exit (1);
+		return 1;
 	}
 
 	reuse = 1;
@@ -150,13 +150,13 @@ main (int argc, char *argv[])
 	if (err) {
 		fprintf (stderr, "Error: setsockopt() failed: %s\n",
 			 strerror (errno));
-		exit (1);
+		return 1;
 	}
 
 	hostinfo = gethostbyname ("localhost");
 	if (hostinfo == NULL) {
 		fprintf (stderr, "Unknown host: localhost\n");
-		exit (1);
+		return 1;
 	}
 
 	addr.sin_family = AF_INET;
@@ -167,7 +167,7 @@ main (int argc, char *argv[])
 		fprintf (stderr, "Error: bind() failed: %s\n",
 			 strerror (errno));
 		close (sock);
-		exit (1);
+		return 1;
 	}
 
 	err = listen (sock, 1);
@@ -175,7 +175,7 @@ main (int argc, char *argv[])
 		fprintf (stderr, "Error: listen() failed: %s\n",
 			 strerror (errno));
 		close (sock);
-		exit (1);
+		return 1;
 	}
 
 	peer_addr_len = sizeof (peer_addr);
@@ -183,14 +183,14 @@ main (int argc, char *argv[])
 	if (peer == -1) {
 		fprintf (stderr, "Error: accept() failed: %s\n",
 			 strerror (errno));
-		exit (1);
+		return 1;
 	}
 
 	peer_file = fdopen (peer, "w+");
 	if (peer_file == NULL) {
 		fprintf (stderr, "Error: fdopen() failed: %s\n",
 			 strerror (errno));
-		exit (1);
+		return 1;
 	}
 
 	do_smtp_to_file (peer_file, output);