Format error messages properly

[slstatus.git] / components / run_command.c

diff --git a/components/run_command.c b/components/run_command.c
index 4a63896..2041ae4 100644 (file)
--- a/components/run_command.c
+++ b/components/run_command.c
@@ -1,4 +1,5 @@
 /* See LICENSE file for copyright and license details. */
+#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -12,7 +13,7 @@ run_command(const char *cmd)
 
        fp = popen(cmd, "r");
        if (fp == NULL) {
-               fprintf(stderr, "Failed to get command output for %s", cmd);
+               fprintf(stderr, "popen '%s': %s\n", cmd, strerror(errno));
                return NULL;
        }
        p = fgets(buf, sizeof(buf) - 1, fp);