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From e36f80cba6d5eefcc1ee664f16c2c72054b83134 Mon Sep 17 00:00:00 2001
From: "Joseph C. Sible" <josephcsible@gmail.com>
Date: Sun, 2 Sep 2018 13:42:26 -0400
Subject: implement fexecve in terms of execveat when it exists
This lets fexecve work even when /proc isn't mounted.
---
src/process/fexecve.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/process/fexecve.c b/src/process/fexecve.c
index 6507b429..8be3f760 100644
--- a/src/process/fexecve.c
+++ b/src/process/fexecve.c
@@ -1,10 +1,15 @@
+#define _GNU_SOURCE
#include <unistd.h>
#include <errno.h>
+#include <fcntl.h>
+#include "syscall.h"
void __procfdname(char *, unsigned);
int fexecve(int fd, char *const argv[], char *const envp[])
{
+ int r = __syscall(SYS_execveat, fd, "", argv, envp, AT_EMPTY_PATH);
+ if (r != -ENOSYS) return __syscall_ret(r);
char buf[15 + 3*sizeof(int)];
__procfdname(buf, fd);
execve(buf, argv, envp);
--
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