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git-mirror/t/helper/test-mktemp.c
Jeff King 14b561e768 test-mktemp: plug memory and descriptor leaks
We test xmkstemp() in our helper by just calling:

  xmkstemp(xstrdup(argv[1]));

This leaks both the copied string as well as the descriptor returned by
the function. In practice this isn't a big deal, since we immediately
exit the program, but:

  1. LSan will complain about the memory leak. The only reason we did
     not notice this in our leak-checking builds is that both of the
     callers in the test suite (both in t0070) pass a broken template
     (and expect failure). So the function calls die() before we can
     actually leak.

     But it's an accident waiting to happen if anybody adds a call which
     succeeds.

  2. Coverity complains about the descriptor leak. There's a long list
     of uninteresting or false positives in Coverity's results, but
     since we're here we might as well fix it, too.

I didn't bother adding a new test that triggers the leak. It's not even
in real production code, but just in the test-helper itself.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-18 10:05:14 -08:00

22 lines
387 B
C

/*
* test-mktemp.c: code to exercise the creation of temporary files
*/
#include "test-tool.h"
#include "git-compat-util.h"
int cmd__mktemp(int argc, const char **argv)
{
char *template;
int fd;
if (argc != 2)
usage("Expected 1 parameter defining the temporary file template");
template = xstrdup(argv[1]);
fd = xmkstemp(template);
close(fd);
free(template);
return 0;
}