Use xrealloc instead of realloc

Change places that use realloc, without a proper error path, to instead use
xrealloc. Drop an erroneous error path in the daemon code that used errno
in the die message in favour of the simpler xrealloc.

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-fmt-merge-msg.c

@@ -27,8 +27,8 @@ static void append_to_list(struct list *list, char *value, void *payload)
 {
 	if (list->nr == list->alloc) {
 		list->alloc += 32;
-		list->list = realloc(list->list, sizeof(char *) * list->alloc);
+		list->list = xrealloc(list->list, sizeof(char *) * list->alloc);
-		list->payload = realloc(list->payload,
+		list->payload = xrealloc(list->payload,
 				sizeof(char *) * list->alloc);
 	}
 	list->payload[list->nr] = payload;

builtin-log.c

@@ -101,7 +101,7 @@ static int git_format_config(const char *var, const char *value)
 	if (!strcmp(var, "format.headers")) {
 		int len = strlen(value);
 		extra_headers_size += len + 1;
-		extra_headers = realloc(extra_headers, extra_headers_size);
+		extra_headers = xrealloc(extra_headers, extra_headers_size);
 		extra_headers[extra_headers_size - len - 1] = 0;
 		strcat(extra_headers, value);
 		return 0;
@@ -381,7 +381,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 			continue;
 
 		nr++;
-		list = realloc(list, nr * sizeof(list[0]));
+		list = xrealloc(list, nr * sizeof(list[0]));
 		list[nr - 1] = commit;
 	}
 	total = nr;

builtin-mv.c

@@ -168,13 +168,13 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 				int j, dst_len;
 
 				if (last - first > 0) {
-					source = realloc(source,
+					source = xrealloc(source,
 							(count + last - first)
 							* sizeof(char *));
-					destination = realloc(destination,
+					destination = xrealloc(destination,
 							(count + last - first)
 							* sizeof(char *));
-					modes = realloc(modes,
+					modes = xrealloc(modes,
 							(count + last - first)
 							* sizeof(enum update_mode));
 				}

daemon.c

@@ -526,7 +526,6 @@ static int socksetup(int port, int **socklist_p)
 
 	for (ai = ai0; ai; ai = ai->ai_next) {
 		int sockfd;
-		int *newlist;
 
 		sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 		if (sockfd < 0)
@@ -560,11 +559,7 @@ static int socksetup(int port, int **socklist_p)
 			continue;	/* not fatal */
 		}
 
-		newlist = realloc(socklist, sizeof(int) * (socknum + 1));
+		socklist = xrealloc(socklist, sizeof(int) * (socknum + 1));
-		if (!newlist)
-			die("memory allocation failed: %s", strerror(errno));
-
-		socklist = newlist;
 		socklist[socknum++] = sockfd;
 
 		if (maxfd < sockfd)

diff-delta.c

@@ -392,7 +392,7 @@ create_delta(const struct delta_index *index,
 				outsize = max_size + MAX_OP_SIZE + 1;
 			if (max_size && outpos > max_size)
 				break;
-			out = realloc(out, outsize);
+			out = xrealloc(out, outsize);
 			if (!out) {
 				free(tmp);
 				return NULL;

dir.c

@@ -101,7 +101,7 @@ void add_exclude(const char *string, const char *base,
 	x->baselen = baselen;
 	if (which->nr == which->alloc) {
 		which->alloc = alloc_nr(which->alloc);
-		which->excludes = realloc(which->excludes,
+		which->excludes = xrealloc(which->excludes,
 					   which->alloc * sizeof(x));
 	}
 	which->excludes[which->nr++] = x;

git.c

@@ -120,7 +120,7 @@ static int split_cmdline(char *cmdline, const char ***argv)
 				; /* skip */
 			if (count >= size) {
 				size += 16;
-				*argv = realloc(*argv, sizeof(char*) * size);
+				*argv = xrealloc(*argv, sizeof(char*) * size);
 			}
 			(*argv)[count++] = cmdline + dst;
 		} else if(!quoted && (c == '\'' || c == '"')) {
@@ -191,7 +191,7 @@ static int handle_alias(int *argcp, const char ***argv)
 			fflush(stderr);
 		}
 
-		new_argv = realloc(new_argv, sizeof(char*) *
+		new_argv = xrealloc(new_argv, sizeof(char*) *
 				    (count + *argcp + 1));
 		/* insert after command name */
 		memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);

sha1_file.c

@@ -1740,7 +1740,7 @@ int read_pipe(int fd, char** return_buf, unsigned long* return_size)
 			off += iret;
 			if (off == size) {
 				size *= 2;
-				buf = realloc(buf, size);
+				buf = xrealloc(buf, size);
 			}
 		}
 	} while (iret > 0);

xdiff-interface.c

@@ -69,7 +69,7 @@ int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
 	for (i = 0; i < nbuf; i++) {
 		if (mb[i].ptr[mb[i].size-1] != '\n') {
 			/* Incomplete line */
-			priv->remainder = realloc(priv->remainder,
+			priv->remainder = xrealloc(priv->remainder,
 						   priv->remainder_size +
 						   mb[i].size);
 			memcpy(priv->remainder + priv->remainder_size,
@@ -83,7 +83,7 @@ int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
 			consume_one(priv, mb[i].ptr, mb[i].size);
 			continue;
 		}
-		priv->remainder = realloc(priv->remainder,
+		priv->remainder = xrealloc(priv->remainder,
 					   priv->remainder_size +
 					   mb[i].size);
 		memcpy(priv->remainder + priv->remainder_size,