[SV 63157] Ensure temporary files are removed when signaled

Original patch from Dmitry Goncharov <dgoncharov@users.sf.net>.
When handling a fatal signal ensure the temporary files for
stdin and the jobserver fifo (if in use) are deleted.

* src/makeint.h (temp_stdin_unlink): Declare a new method.
* src/main.c (temp_stdin_unlink): Delete the stdin temporary file
if it exists.  If the unlink fails and we're not handling a signal
then show an error.
(main): Call temp_stdin_unlink() instead of unlinking by hand.
* src/commands.c (fatal_error_signal): Invoke cleanup methods if
we're handling a fatal signal.
* tests/scripts/features/output-sync: Test signal handling during
output sync and jobserver with FIFO.
* tests/scripts/features/temp_stdin: Test signal handling when
makefiles are read from stdin.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/makeint.h b/src/makeint.h
index 2da2a6fd..89a5f770 100644
--- a/src/makeint.h
+++ b/src/makeint.h
@@ -545,6 +545,7 @@ void out_of_memory () NORETURN;
                                  (_f), (_n), (_s))
 
 void decode_env_switches (const char*, size_t line);
+void temp_stdin_unlink (void);
 void die (int) NORETURN;
 void pfatal_with_name (const char *) NORETURN;
 void perror_with_name (const char *, const char *);