X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=tools%2Fccanlint%2Fasync.c;h=5c2c4da73d31b1929b1dd25fcaa513c1b2337e92;hp=9c7a442ee64fabcbd8a3a581a3f79e85ebbac725;hb=37965b33eeb202773dc70c4546d0b050b8e717b5;hpb=24e5ddb143fb5e79112649472258f5da67cc7362

diff --git a/tools/ccanlint/async.c b/tools/ccanlint/async.c
index 9c7a442e..5c2c4da7 100644
--- a/tools/ccanlint/async.c
+++ b/tools/ccanlint/async.c
@@ -148,14 +148,16 @@ static void reap_output(void)
 	tlist_for_each_safe(&running, c, next, list) {
 		if (FD_ISSET(c->output_fd, &in)) {
 			int old_len, len;
+			/* This length includes nul terminator! */
 			old_len = talloc_array_length(c->output);
 			c->output = talloc_realloc(c, c->output, char,
 						   old_len + 1024);
-			len = read(c->output_fd, c->output + old_len, 1024);
+			len = read(c->output_fd, c->output + old_len - 1, 1024);
 			if (len < 0)
 				err(1, "Reading from async command");
 			c->output = talloc_realloc(c, c->output, char,
 						   old_len + len);
+			c->output[old_len + len - 1] = '\0';
 			if (len == 0) {
 				struct rusage ru;
 				wait4(c->pid, &c->status, 0, &ru);