| #include "stdio_impl.h" |
| |
| FILE *fopen(const char *filename, const char *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() */ |
| if (strchr(mode, '+')) flags = O_RDWR; |
| else if (*mode == 'r') flags = O_RDONLY; |
| else flags = O_WRONLY; |
| if (strchr(mode, 'x')) flags |= O_EXCL; |
| if (*mode != 'r') flags |= O_CREAT; |
| if (*mode == 'w') flags |= O_TRUNC; |
| if (*mode == 'a') flags |= O_APPEND; |
| |
| fd = syscall_cp(SYS_open, filename, flags|O_LARGEFILE, 0666); |
| if (fd < 0) return 0; |
| |
| f = __fdopen(fd, mode); |
| if (f) return f; |
| |
| __syscall(SYS_close, fd); |
| return 0; |
| } |
| |
| LFS64(fopen); |