[PATCH 1/2] modules/lookup_program.c: pass caller UID to program
This patch passes the UID of the calling process to the program map
in the environment. The program map can use this e.g. to obtain
credentials.
---
modules/lookup_program.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/modules/lookup_program.c b/modules/lookup_program.c
index 2457108..2977e64 100644
--- a/modules/lookup_program.c
+++ b/modules/lookup_program.c
@@ -244,6 +244,7 @@ int lookup_mount(struct autofs_point *ap, const char *name, int name_len, void *
close(epipefd[1]);
goto out_free;
} else if (f == 0) {
+ struct thread_stdenv_vars *tsv;
reset_signals();
close(pipefd[0]);
close(epipefd[0]);
@@ -255,6 +256,12 @@ int lookup_mount(struct autofs_point *ap, const char *name, int name_len, void *
warn(ap->logopt,
MODPREFIX "failed to set PWD to %s for map %s",
ap->path, ctxt->mapname);
+ tsv = pthread_getspecific(key_thread_stdenv_vars);
+ if (tsv) {
+ char buf[16];
+ if (snprintf(buf, sizeof(buf), "%u", tsv->uid) < sizeof(buf))
+ setenv("CALLER_UID", buf, 1);
+ }
execl(ctxt->mapname, ctxt->mapname, name, NULL);
_exit(255); /* execl() failed */
}
--
1.8.1
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