xspawn: Use _PATH_DEFPATH if _CS_PATH is not defined

And set errno correctly if neither one is.  Fixes
tests/posix/exec_nopath on Android.

2 files changed, 14 insertions, 2 deletions

diff --git a/src/util.h b/src/util.h
index 2e89af6..ac08e4d 100644
--- a/src/util.h
+++ b/src/util.h
@@ -58,6 +58,10 @@
 #	define BFS_HAS_MNTENT BFS_HAS_INCLUDE(<mntent.h>, __GLIBC__)
 #endif
 
+#ifndef BFS_HAS_PATHS
+#	define BFS_HAS_PATHS BFS_HAS_INCLUDE(<paths.h>, true)
+#endif
+
 #ifndef BFS_HAS_SYS_ACL
 #	define BFS_HAS_SYS_ACL BFS_HAS_INCLUDE(<sys/acl.h>, true)
 #endif
diff --git a/src/xspawn.c b/src/xspawn.c
index 67e0572..43a6f1c 100644
--- a/src/xspawn.c
+++ b/src/xspawn.c
@@ -24,6 +24,10 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#if BFS_HAS_PATHS
+#	include <paths.h>
+#endif
+
 /**
  * Types of spawn actions.
  */
@@ -260,11 +264,15 @@ char *bfs_spawn_resolve(const char *exe) {
 	const char *path = getenv("PATH");
 
 	char *confpath = NULL;
-#ifdef _CS_PATH
 	if (!path) {
+#if defined(_CS_PATH)
 		path = confpath = xconfstr(_CS_PATH);
-	}
+#elif defined(_PATH_DEFPATH)
+		path = _PATH_DEFPATH;
+#else
+		errno = ENOENT;
 #endif
+	}
 	if (!path) {
 		return NULL;
 	}