Use sasprintf() instead of alloc'ing and strncpy() in i3bar.

resolves #1995

i3bar/src/child.c

@@ -220,24 +220,15 @@ static int stdin_string(void *context, const unsigned char *val, size_t len) {
         return 1;
     }
     if (strcasecmp(ctx->last_map_key, "min_width") == 0) {
-        char *copy = (char *)smalloc(len + 1);
+        sasprintf(&(ctx->block.min_width_str), "%.*s", len, val);
-        strncpy(copy, (const char *)val, len);
-        copy[len] = 0;
-        ctx->block.min_width_str = copy;
         return 1;
     }
     if (strcasecmp(ctx->last_map_key, "name") == 0) {
-        char *copy = (char *)smalloc(len + 1);
+        sasprintf(&(ctx->block.name), "%.*s", len, val);
-        strncpy(copy, (const char *)val, len);
-        copy[len] = 0;
-        ctx->block.name = copy;
         return 1;
     }
     if (strcasecmp(ctx->last_map_key, "instance") == 0) {
-        char *copy = (char *)smalloc(len + 1);
+        sasprintf(&(ctx->block.instance), "%.*s", len, val);
-        strncpy(copy, (const char *)val, len);
-        copy[len] = 0;
-        ctx->block.instance = copy;
         return 1;
     }
 

i3bar/src/config.c

@@ -30,10 +30,7 @@ static bool parsing_bindings;
  */
 static int config_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
     FREE(cur_key);
-
+    sasprintf(&(cur_key), "%.*s", keyLen, keyVal);
-    cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
-    strncpy(cur_key, (const char *)keyVal, keyLen);
-    cur_key[keyLen] = '\0';
 
     if (strcmp(cur_key, "bindings") == 0)
         parsing_bindings = true;

i3bar/src/mode.c

@@ -33,11 +33,7 @@ static int mode_string_cb(void *params_, const unsigned char *val, size_t len) {
     struct mode_json_params *params = (struct mode_json_params *)params_;
 
     if (!strcmp(params->cur_key, "change")) {
-        char *copy = smalloc(sizeof(const unsigned char) * (len + 1));
+        sasprintf(&(params->name), "%.*s", len, val);
-        strncpy(copy, (const char *)val, len);
-        copy[len] = '\0';
-
-        params->name = copy;
         FREE(params->cur_key);
         return 1;
     }
@@ -74,11 +70,7 @@ static int mode_boolean_cb(void *params_, int val) {
 static int mode_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
     struct mode_json_params *params = (struct mode_json_params *)params_;
     FREE(params->cur_key);
-
+    sasprintf(&(params->cur_key), "%.*s", keyLen, keyVal);
-    params->cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
-    strncpy(params->cur_key, (const char *)keyVal, keyLen);
-    params->cur_key[keyLen] = '\0';
-
     return 1;
 }
 

i3bar/src/outputs.c

@@ -108,9 +108,8 @@ static int outputs_string_cb(void *params_, const unsigned char *val, size_t len
     struct outputs_json_params *params = (struct outputs_json_params *)params_;
 
     if (!strcmp(params->cur_key, "current_workspace")) {
-        char *copy = smalloc(sizeof(const unsigned char) * (len + 1));
+        char *copy = NULL;
-        strncpy(copy, (const char *)val, len);
+        sasprintf(&copy, "%.*s", len, val);
-        copy[len] = '\0';
 
         char *end;
         errno = 0;
@@ -118,7 +117,8 @@ static int outputs_string_cb(void *params_, const unsigned char *val, size_t len
         if (errno == 0 &&
             (end && *end == '\0'))
             params->outputs_walk->ws = parsed_num;
-        free(copy);
+
+        FREE(copy);
         FREE(params->cur_key);
         return 1;
     }
@@ -127,14 +127,9 @@ static int outputs_string_cb(void *params_, const unsigned char *val, size_t len
         return 0;
     }
 
-    char *name = smalloc(sizeof(const unsigned char) * (len + 1));
+    sasprintf(&(params->outputs_walk->name), "%.*s", len, val);
-    strncpy(name, (const char *)val, len);
-    name[len] = '\0';
-
-    params->outputs_walk->name = name;
 
     FREE(params->cur_key);
-
     return 1;
 }
 
@@ -228,11 +223,7 @@ static int outputs_end_map_cb(void *params_) {
 static int outputs_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
     struct outputs_json_params *params = (struct outputs_json_params *)params_;
     FREE(params->cur_key);
-
+    sasprintf(&(params->cur_key), "%.*s", keyLen, keyVal);
-    params->cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
-    strncpy(params->cur_key, (const char *)keyVal, keyLen);
-    params->cur_key[keyLen] = '\0';
-
     return 1;
 }
 

i3bar/src/workspaces.c

@@ -102,8 +102,6 @@ static int workspaces_integer_cb(void *params_, long long val) {
 static int workspaces_string_cb(void *params_, const unsigned char *val, size_t len) {
     struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
 
-    char *output_name;
-
     if (!strcmp(params->cur_key, "name")) {
         const char *ws_name = (const char *)val;
         params->workspaces_walk->canonical_name = sstrndup(ws_name, len);
@@ -147,11 +145,11 @@ static int workspaces_string_cb(void *params_, const unsigned char *val, size_t
 
     if (!strcmp(params->cur_key, "output")) {
         /* We add the ws to the TAILQ of the output, it belongs to */
-        output_name = smalloc(sizeof(const unsigned char) * (len + 1));
+        char *output_name = NULL;
-        strncpy(output_name, (const char *)val, len);
+        sasprintf(&output_name, "%.*s", len, val);
-        output_name[len] = '\0';
+
         i3_output *target = get_output_by_name(output_name);
-        if (target) {
+        if (target != NULL) {
             params->workspaces_walk->output = target;
 
             TAILQ_INSERT_TAIL(params->workspaces_walk->output->workspaces,
@@ -201,11 +199,7 @@ static int workspaces_start_map_cb(void *params_) {
 static int workspaces_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
     struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
     FREE(params->cur_key);
-
+    sasprintf(&(params->cur_key), "%.*s", keyLen, keyVal);
-    params->cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
-    strncpy(params->cur_key, (const char *)keyVal, keyLen);
-    params->cur_key[keyLen] = '\0';
-
     return 1;
 }