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#if 0
#include <stddef.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
int access(const char *path, int amode)
{
struct stat st;
mode_t check = (amode & R_OK ? 4 : 0)
| (amode & W_OK ? 2 : 0)
| (amode & X_OK ? 1 : 0);
if (amode != F_OK && ((amode & ~(R_OK | W_OK | X_OK)) != 0)) {
errno = EINVAL;
return -1;
}
if (stat(path, &st) == -1) {
/* errno set by stat() */
return -1;
}
if (amode == F_OK) {
return 0;
}
if (st.st_uid == getuid()) {
check <<= 6;
} else if (st.st_gid == getgid()) {
check <<= 3;
}
if ((st.st_mode & check) == check) {
return 0;
}
errno = EACCES;
return -1;
}
/*
POSIX(1)
*/
#endif
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