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#include <io.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <libc.h>
__weak void __stdio_cleanup(void)
{
}
FILE *fopen(const char *restrict pathname, const char *restrict mode)
{
int fd, flags, _mode;
FILE *fp;
_mode = 0;
if (mode[0] == 'r') {
flags = O_RDONLY;
} else if (mode[0] == 'w') {
flags = O_WRONLY | O_CREAT | O_TRUNC;
} else if (mode[0] == 'a') {
flags = O_WRONLY | O_CREAT | O_APPEND;
_mode = 0666;
} else {
errno = EINVAL;
return NULL;
}
if (strchr(mode, '+')) {
flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
}
if ((fd = open(pathname, flags, _mode)) < 0)
return NULL;
if ((fp = calloc(1, sizeof(FILE))) == NULL)
return NULL;
fp->fd = fd;
fp->buf_size = BUFSIZ;
fp->flags = flags;
fp->type = _IOLBF;
atomic_flag_clear(&fp->lock);
if ((fp->buf = malloc(BUFSIZ)) == NULL) {
close(fd);
free(fp);
return NULL;
}
__libc_fadd(fp);
return fp;
}
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