#include <unistd.h>
#include <fcntl.h>
+#include <sys/wait.h>
#include "syscall.h"
#include "pthread_impl.h"
int faccessat(int fd, const char *filename, int amode, int flag)
{
- if (!flag || (flag==AT_EACCESS && getuid()==geteuid() && getgid()==getegid()))
- return syscall(SYS_faccessat, fd, filename, amode, flag);
+ if (flag) {
+ int ret = __syscall(SYS_faccessat2, fd, filename, amode, flag);
+ if (ret != -ENOSYS) return __syscall_ret(ret);
+ }
- if (flag != AT_EACCESS)
+ if (flag & ~AT_EACCESS)
return __syscall_ret(-EINVAL);
+ if (!flag || (getuid()==geteuid() && getgid()==getegid()))
+ return syscall(SYS_faccessat, fd, filename, amode);
+
char stack[1024];
sigset_t set;
+ pid_t pid;
+ int status;
int ret, p[2];
- if (pipe(p)) return __syscall_ret(-EBUSY);
+ if (pipe2(p, O_CLOEXEC)) return __syscall_ret(-EBUSY);
struct ctx c = { .fd = fd, .filename = filename, .amode = amode, .p = p[1] };
__block_all_sigs(&set);
- ret = __clone(checker, stack+sizeof stack, 0, &c);
+ pid = __clone(checker, stack+sizeof stack, 0, &c);
__syscall(SYS_close, p[1]);
- if (ret<0 || __syscall(SYS_read, p[0], &ret, sizeof ret) != sizeof(ret))
+ if (pid<0 || __syscall(SYS_read, p[0], &ret, sizeof ret) != sizeof(ret))
ret = -EBUSY;
__syscall(SYS_close, p[0]);
+ __syscall(SYS_wait4, pid, &status, __WCLONE, 0);
__restore_sigs(&set);