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63 lines
1.6 KiB
63 lines
1.6 KiB
#define _BSD_SOURCE
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#include <sys/stat.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "syscall.h"
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#include "kstat.h"
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int fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
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{
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int ret;
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struct kstat kst;
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if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {
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ret = __syscall(SYS_fstat, fd, st);
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if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
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ret = __syscall(SYS_fstatat, fd, path, st, flag);
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if (ret==-EINVAL) {
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char buf[15+3*sizeof(int)];
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__procfdname(buf, fd);
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#ifdef SYS_stat
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ret = __syscall(SYS_stat, buf, st);
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#else
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ret = __syscall(SYS_fstatat, AT_FDCWD, buf, st, 0);
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#endif
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}
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}
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}
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#ifdef SYS_lstat
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else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
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ret = __syscall(SYS_lstat, path, &kst);
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#endif
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#ifdef SYS_stat
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else if ((fd == AT_FDCWD || *path=='/') && !flag)
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ret = __syscall(SYS_stat, path, &kst);
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#endif
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else ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
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if (ret) return __syscall_ret(ret);
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*st = (struct stat){
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.st_dev = kst.st_dev,
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.st_ino = kst.st_ino,
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.st_mode = kst.st_mode,
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.st_nlink = kst.st_nlink,
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.st_uid = kst.st_uid,
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.st_gid = kst.st_gid,
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.st_rdev = kst.st_rdev,
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.st_size = kst.st_size,
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.st_blksize = kst.st_blksize,
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.st_blocks = kst.st_blocks,
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.st_atim.tv_sec = kst.st_atime_sec,
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.st_atim.tv_nsec = kst.st_atime_nsec,
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.st_mtim.tv_sec = kst.st_mtime_sec,
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.st_mtim.tv_nsec = kst.st_mtime_nsec,
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.st_ctim.tv_sec = kst.st_ctime_sec,
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.st_ctim.tv_nsec = kst.st_ctime_nsec,
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};
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return 0;
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}
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weak_alias(fstatat, fstatat64);
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