commit a939a59f8b6bfd9e73ea04d19c121eaae3473fb9
parent 8d3d9bc44a7ae70fab00852a136f6b1b5e5aaa7c
Author: Oscar Benedito <oscar@oscarbenedito.com>
Date:   Sun, 28 Mar 2021 22:25:30 +0200

Fix empty lines not treated as empty output

Diffstat:

Mdwmblocks.c | 9++++-----


1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/dwmblocks.c b/dwmblocks.c
@@ -65,12 +65,11 @@ void getcmd(const Block *block, char *output)
 	fgets(output+i, CMDLENGTH-i-delimLen, cmdf);
 	pclose(cmdf);
 	i = strlen(output);
-	if (i == 0) {
-		/* return if block and command output are both empty */
-		return;
-	}
 	i = (i && output[i-1] == '\n') ? i-1 : i;   /* delete trailing newline */
-	strncpy(output+i, delim, delimLen);
+	if (i == 0)     /* ensure length 0 in case the string was "\n" */
+		output[0] = '\0';   /* ensure length 0 in case the string was "\n" */
+	else            /* only add delimiter if output not empty */
+		strncpy(output+i, delim, delimLen);
 }
 
 void getcmds(int time)