libselinux: use null character with strings

Signed-off-by: Kalevi Kolttonen <kalevi@kolttonen.fi>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>

Author: retrodood

libselinux/src/get_context_list.c

@@ -152,7 +152,7 @@ static int get_context_user(FILE *fp, context_t fromcon, const char *user,
 
 	while ((len = getline(&line, &line_len, fp)) > 0) {
 		if (line[len - 1] == '\n')
-			line[len - 1] = 0;
+			line[len - 1] = '\0';
 
 		/* Skip leading whitespace. */
 		start = line;
@@ -175,14 +175,14 @@ static int get_context_user(FILE *fp, context_t fromcon, const char *user,
 			start++;
 		if (*start != ':')
 			continue;
-		*start = 0;
+		*start = '\0';
 		linetype = ++start;
 		while (*start && !isspace((unsigned char)*start) &&
 		       *start != ':')
 			start++;
 		if (!(*start))
 			continue;
-		*start = 0;
+		*start = '\0';
 		if (!strcmp(fromrole, linerole) &&
 		    !strcmp(fromtype, linetype)) {
 			found = 1;
@@ -209,7 +209,7 @@ static int get_context_user(FILE *fp, context_t fromcon, const char *user,
 		while (*end && !isspace((unsigned char)*end))
 			end++;
 		if (*end)
-			*end++ = 0;
+			*end++ = '\0';
 
 		/* Check whether a new context is valid */
 		if (SIZE_MAX - user_len < strlen(start) + 2) {
@@ -308,7 +308,7 @@ static int get_failsafe_context(const char *user, char **newcon)
 		return -1;
 	plen = strlen(ptr);
 	if (plen && buf[plen - 1] == '\n')
-		buf[plen - 1] = 0;
+		buf[plen - 1] = '\0';
 
 	nlen = strlen(user) + 1 + plen + 1;
 	*newcon = malloc(nlen);

libselinux/src/get_default_type.c

@@ -39,7 +39,7 @@ static int find_default_type(FILE *fp, const char *role, char **type)
 			return -1;
 		}
 		if (buf[0] && buf[strlen(buf) - 1])
-			buf[strlen(buf) - 1] = 0;
+			buf[strlen(buf) - 1] = '\0';
 
 		ptr = buf;
 		while (*ptr && isspace((unsigned char)*ptr))

libselinux/src/is_customizable_type.c

@@ -45,7 +45,7 @@ static void customizable_init(void)
 			while (fgets_unlocked(buf, selinux_page_size, fp) &&
 			       i < ctr) {
 				if (buf[0])
-					buf[strlen(buf) - 1] = 0;
+					buf[strlen(buf) - 1] = '\0';
 				list[i] = strdup(buf);
 				if (!list[i]) {
 					unsigned int j;

libselinux/src/matchmediacon.c

@@ -27,7 +27,7 @@ int matchmediacon(const char *media, char **con)
 			return -1;
 		}
 		if (current_line[0] && current_line[strlen(current_line) - 1])
-			current_line[strlen(current_line) - 1] = 0;
+			current_line[strlen(current_line) - 1] = '\0';
 		/* Skip leading whitespace before the partial context. */
 		ptr = current_line;
 		while (*ptr && isspace((unsigned char)*ptr))