X-Git-Url: https://git.xinqibao.xyz/dwm.git/blobdiff_plain/b1669b5c48f71c9a7a919dbf09a1af527c62f69a..da2bbd371c522d63d737d43a127601a3fdbcb9d8:/util.c

diff --git a/util.c b/util.c
index 76ba5ab..3f41b3c 100644
--- a/util.c
+++ b/util.c
@@ -126,15 +126,16 @@ pipe_spawn(char *buf, unsigned int len, Display *dpy, char *argv[])
 		perror(" failed");
 	}
 	else {
-		n = 0;
+		l = n = 0;
 		close(pfd[1]);
-		while(l > n) {
+		while(n < len) {
 			if((l = read(pfd[0], buf + n, len - n)) < 1)
 				break;
 			n += l;
 		}
+		while(l > n);
 		close(pfd[0]);
-		buf[n - 1] = 0;
+		buf[n < len ? n : len - 1] = 0;
 	}
 	wait(0);
 }