Convert internal rc_getline() calls to getline() calls

getline has been in posix since POSIX.1-2008, so it should be safe for
us to use it instead of using our wrapper function.

This fixes OpenRC#278.

src/librc/librc-daemon.c

@@ -134,7 +134,8 @@ rc_find_pids(const char *exec, const char *const *argv, uid_t uid, pid_t pid)
 		fp = fopen("/proc/self/status", "r");
 		if (fp) {
 			while (! feof(fp)) {
-				rc_getline(&line, &len, fp);
+				if (getline(&line, &len, fp) <= 0)
+					break;
 				if (strncmp(line, "envID:\t0", 8) == 0) {
 					openvz_host = true;
 					break;
@@ -190,7 +191,8 @@ rc_find_pids(const char *exec, const char *const *argv, uid_t uid, pid_t pid)
 				if (! fp)
 					continue;
 				while (! feof(fp)) {
-					rc_getline(&line, &len, fp);
+					if (getline(&line, &len, fp) <= 0)
+						break;
 					if (strncmp(line, "envID:", 6) == 0) {
 						container_pid = ! (strncmp(line, "envID:\t0", 8) == 0);
 						break;
@@ -341,7 +343,7 @@ _match_daemon(const char *path, const char *file, RC_STRINGLIST *match)
 	if (!fp)
 		return false;
 
-	while ((rc_getline(&line, &len, fp))) {
+	while ((getline(&line, &len, fp) > 0)) {
 		TAILQ_FOREACH(m, match, entries)
 		    if (strcmp(line, m->value) == 0) {
 			    TAILQ_REMOVE(match, m, entries);
@@ -546,7 +548,7 @@ rc_service_daemons_crashed(const char *service)
 		if (!fp)
 			break;
 
-		while ((rc_getline(&line, &len, fp))) {
+		while ((getline(&line, &len, fp) > 0)) {
 			p = line;
 			if ((token = strsep(&p, "=")) == NULL || !p)
 				continue;

src/librc/librc-depend.c

@@ -127,7 +127,7 @@ rc_deptree_load_file(const char *deptree_file)
 
 	deptree = xmalloc(sizeof(*deptree));
 	TAILQ_INIT(deptree);
-	while ((rc_getline(&line, &len, fp)))
+	while ((getline(&line, &len, fp) > 0))
 	{
 		p = line;
 		e = strsep(&p, "_");
@@ -779,7 +779,7 @@ rc_deptree_update(void)
 	deptree = xmalloc(sizeof(*deptree));
 	TAILQ_INIT(deptree);
 	config = rc_stringlist_new();
-	while ((rc_getline(&line, &len, fp)))
+	while ((getline(&line, &len, fp) > 0))
 	{
 		depends = line;
 		service = strsep(&depends, " ");

src/librc/librc-misc.c

@@ -134,7 +134,7 @@ rc_proc_getent(const char *ent _unused)
 
 	proc = NULL;
 	i = 0;
-	if (rc_getline(&proc, &i, fp) == -1 || proc == NULL)
+	if (getline(&proc, &i, fp) == -1 || proc == NULL)
 		return NULL;
 
 	if (proc != NULL) {
@@ -178,7 +178,7 @@ rc_config_list(const char *file)
 	if (!(fp = fopen(file, "r")))
 		return list;
 
-	while ((rc_getline(&buffer, &len, fp))) {
+	while ((getline(&buffer, &len, fp) > 0)) {
 		p = buffer;
 		/* Strip leading spaces/tabs */
 		while ((*p == ' ') || (*p == '\t'))

src/librc/librc.c

@@ -175,7 +175,7 @@ file_regex(const char *file, const char *regex)
 		return false;
 	}
 
-	while ((rc_getline(&line, &len, fp))) {
+	while ((getline(&line, &len, fp) > 0)) {
 		char *str = line;
 		/* some /proc files have \0 separated content so we have to
 		   loop through the 'line' */
@@ -650,7 +650,11 @@ rc_service_extra_commands(const char *service)
 	free(svc);
 
 	if ((fp = popen(cmd, "r"))) {
-		rc_getline(&buffer, &len, fp);
+		if (getline(&buffer, &len, fp) < 0) {
+			pclose(fp);
+			free(cmd);
+			return NULL;
+		}
 		p = buffer;
 		commands = rc_stringlist_new();
 
@@ -689,7 +693,11 @@ rc_service_description(const char *service, const char *option)
 	snprintf(cmd, l, DESCSTR, svc, *option ? "_" : "", option);
 	free(svc);
 	if ((fp = popen(cmd, "r"))) {
-		rc_getline(&desc, &len, fp);
+		if (getline(&desc, &len, fp) < 0) {
+			pclose(fp);
+			free(cmd);
+			return desc;
+		}
 		pclose(fp);
 	}
 	free(cmd);