diff: fix textconv error zombies
To make the code simpler, run_textconv lumps all of its
error checking into one conditional. However, the
short-circuit means that an error in reading will prevent us
from calling finish_command, leaving a zombie child.
Clean up properly after errors.
Based-on-work-by: Jeff King <peff@peff.net>
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff.c b/diff.c
index 0d465fa..9905923 100644
--- a/diff.c
+++ b/diff.c
@@ -3865,6 +3865,7 @@
const char **arg = argv;
struct child_process child;
struct strbuf buf = STRBUF_INIT;
+ int err = 0;
temp = prepare_temp_file(spec->path, spec);
*arg++ = pgm;
@@ -3875,16 +3876,20 @@
child.use_shell = 1;
child.argv = argv;
child.out = -1;
- if (start_command(&child) != 0 ||
- strbuf_read(&buf, child.out, 0) < 0 ||
- finish_command(&child) != 0) {
- close(child.out);
- strbuf_release(&buf);
+ if (start_command(&child)) {
remove_tempfile();
- error("error running textconv command '%s'", pgm);
return NULL;
}
+
+ if (strbuf_read(&buf, child.out, 0) < 0)
+ err = error("error reading from textconv command '%s'", pgm);
close(child.out);
+
+ if (finish_command(&child) || err) {
+ strbuf_release(&buf);
+ remove_tempfile();
+ return NULL;
+ }
remove_tempfile();
return strbuf_detach(&buf, outsize);
