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#include "stdio_impl.h"
#include <fcntl.h>
#include <string.h>
#include <errno.h>
FILE *fopen(const char *restrict filename, const char *restrict mode)
{
FILE *f;
int fd;
int flags;
/* Check for valid initial mode character */
if (!strchr("rwa", *mode)) {
errno = EINVAL;
return 0;
}
/* Compute the flags to pass to open() */
flags = __fmodeflags(mode);
fd = sys_open(filename, flags, 0666);
if (fd < 0) return 0;
if (flags & O_CLOEXEC)
__syscall(SYS_fcntl, fd, F_SETFD, FD_CLOEXEC);
f = __fdopen(fd, mode);
if (f) return f;
__syscall(SYS_close, fd);
return 0;
}
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