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#include "__stdio.h" // for __FILE, __libc_fadd
#include <stdio.h> // for FILE, _IONBF, SEEK_END, _IOLBF, fdopen
#include <stdlib.h> // for calloc, free
#include <sys/cdefs.h>
#include <unistd.h> // for lseek, off_t
FILE *fdopen(int fildes, const char *mode)
{
struct __FILE *stream;
if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w' && mode[0] != 'a')) {
return NULL;
}
stream = calloc(1, sizeof(struct __FILE));
if (stream == NULL)
return NULL;
stream->fd = fildes;
atomic_flag_clear(&stream->lock);
if (mode[0] == 'r') {
stream->type = _IONBF;
} else if (mode[0] == 'w') {
stream->type = _IOLBF;
} else if (mode[0] == 'a') {
off_t off;
stream->type = _IONBF;
off = lseek(fildes, 0, SEEK_END);
if (off == (off_t)-1) {
free(stream);
return NULL;
}
}
__libc_fadd(stream);
return stream;
}
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