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fixincludes: don't abort() on access failure [PR103306]

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Some distro may ship dangling symlinks in include directories, triggers
the access failure.  Skip it and continue to next header instead of
being to panic.

Restore to old behavior before r12-5234 but without resurrecting the
problematic getcwd() call, by using the environment variable "INPUT"
exported by fixinc.sh.

Tested on x86_64-linux-gnu, with a dangling symlink intentionally
injected into /usr/include.

fixincludes/

	PR bootstrap/103306
	* fixincl.c (process): Don't call abort().
This commit is contained in:
Xi Ruoyao 2021-11-18 18:46:12 +08:00
parent d6024c85a1
commit 3363022ed8
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GPG Key ID: D95E4716CCBB34DC
1 changed files with 12 additions and 3 deletions
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15
fixincludes/fixincl.c
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@ -1352,10 +1352,19 @@ process (void)
if (access (pz_curr_file, R_OK) != 0)
{
/* Some really strange error happened. */
fprintf (stderr, "Cannot access %s: %s\n", pz_curr_file,
/* It may happens if for e. g. the distro ships some broken symlinks
in /usr/include. */
/* "INPUT" is exported in fixinc.sh, which is the pwd where fixincl
runs. It's used instead of getcwd to avoid allocating a buffer
with unknown length. */
const char *cwd = getenv ("INPUT");
if (!cwd)
cwd = "the working directory";
fprintf (stderr, "Cannot access %s from %s: %s\n", pz_curr_file, cwd,
xstrerror (errno));
abort ();
return;
}
pz_curr_data = load_file (pz_curr_file);