set errno when getpw*_r, getgr*_r, and getspnam_r fail

these functions return an error code, and are not explicitly
documented to set errno, but they are nonstandard and the historical
implementations do set errno as well, and some applications expect
this behavior. do likewise for compatibility.

patch by Rudolph Pereira.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/passwd/getgr_r.c b/src/passwd/getgr_r.c
index 7246e8a4..f3e8f603 100644
--- a/src/passwd/getgr_r.c
+++ b/src/passwd/getgr_r.c
@@ -34,6 +34,7 @@ static int getgr_r(const char *name, gid_t gid, struct group *gr, char *buf, siz
  	free(mem);
  	free(line);
 	pthread_setcancelstate(cs, 0);
+	if (rv) errno = rv;
 	return rv;
 }