X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fprocess%2Ffexecve.c;h=554c1981b670f294b999295626e37b8bc5fc0b28;hb=b90841e2583237a4132bbbd74752e0e9563660cd;hp=3098645da5a7c8762d492d59cebc68afd17cc2ad;hpb=f2374ed852654ca13404986d8c04f82bf58812cb;p=musl

diff --git a/src/process/fexecve.c b/src/process/fexecve.c
index 3098645d..554c1981 100644
--- a/src/process/fexecve.c
+++ b/src/process/fexecve.c
@@ -1,10 +1,16 @@
+#define _GNU_SOURCE
 #include <unistd.h>
-#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include "syscall.h"
 
 int fexecve(int fd, char *const argv[], char *const envp[])
 {
-	static const char proc[] = "/proc/self/fd/%d";
-	char buf[sizeof proc + 3*sizeof(int)];
-	snprintf(buf, sizeof buf, proc, fd);
-	return execve(buf, argv, 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);
+	if (errno == ENOENT) errno = EBADF;
+	return -1;
 }