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Date: Sun, 2 Sep 2018 00:04:55 -0400
From: Joseph Sible <josephcsible@...il.com>
To: musl@...ts.openwall.com
Subject: [PATCH] fexecve: implement in terms of execveat when it exists
This lets fexecve work even when /proc isn't mounted.
---
src/process/fexecve.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/process/fexecve.c b/src/process/fexecve.c
index 6507b42..905487e 100644
--- a/src/process/fexecve.c
+++ b/src/process/fexecve.c
@@ -1,13 +1,20 @@
+#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[])
{
+#ifdef SYS_execveat
+ return syscall(SYS_execveat, fd, "", argv, envp, AT_EMPTY_PATH);
+#else
char buf[15 + 3*sizeof(int)];
__procfdname(buf, fd);
execve(buf, argv, envp);
if (errno == ENOENT) errno = EBADF;
return -1;
+#endif
}
--
2.7.4
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