Remove all sprintf calls

Replace them with snprintf, which ensures buffer overflows won't
happen.

1 files changed, 3 insertions, 2 deletions

diff --git a/swaynag/swaynag.c b/swaynag/swaynag.c
index 03ec0411..23d23f38 100644
--- a/swaynag/swaynag.c
+++ b/swaynag/swaynag.c
@@ -28,8 +28,9 @@ static bool terminal_execute(char *terminal, char *command) {
         fprintf(tmp, "#!/bin/sh\nrm %s\n%s", fname, command);
         fclose(tmp);
         chmod(fname, S_IRUSR | S_IWUSR | S_IXUSR);
-        char *cmd = malloc(sizeof(char) * (strlen(terminal) + strlen(" -e ") + strlen(fname) + 1));
-        sprintf(cmd, "%s -e %s", terminal, fname);
+        size_t cmd_size = strlen(terminal) + strlen(" -e ") + strlen(fname) + 1;
+        char *cmd = malloc(cmd_size);
+        snprintf(cmd, cmd_size, "%s -e %s", terminal, fname);
         execlp("sh", "sh", "-c", cmd, NULL);
         sway_log_errno(SWAY_ERROR, "Failed to run command, execlp() returned.");
         free(cmd);