Add POSIX fexecve.
I'm skeptical about the usefulness of this, but it's in POSIX, it's
in glibc (but not iOS), and it is used in some internal source (test
runners and container code).
Bug: N/A
Test: ran tests
Change-Id: I92c5398f2a679b21a33fba92bc8e67e3ae2eb76f
diff --git a/libc/bionic/exec.cpp b/libc/bionic/exec.cpp
index 2001106..1cf3a58 100644
--- a/libc/bionic/exec.cpp
+++ b/libc/bionic/exec.cpp
@@ -39,6 +39,8 @@
#include <string.h>
#include <unistd.h>
+#include "private/FdPath.h"
+
extern "C" char** environ;
enum ExecVariant { kIsExecL, kIsExecLE, kIsExecLP };
@@ -170,3 +172,10 @@
if (saw_EACCES) errno = EACCES;
return -1;
}
+
+int fexecve(int fd, char* const* argv, char* const* envp) {
+ // execveat with AT_EMPTY_PATH (>= 3.19) seems to offer no advantages.
+ execve(FdPath(fd).c_str(), argv, envp);
+ if (errno == ENOENT) errno = EBADF;
+ return -1;
+}