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