| /* |
| * openmode.c |
| * |
| * Parse the mode argument to fopen() or fdopen() |
| */ |
| |
| #include "stdioint.h" |
| |
| int __parse_open_mode(const char *mode) |
| { |
| int rwflags = O_RDONLY; |
| int crflags = 0; |
| int eflag = 0; |
| |
| while (*mode) { |
| switch (*mode++) { |
| case 'r': |
| rwflags = O_RDONLY; |
| crflags = 0; |
| break; |
| case 'w': |
| rwflags = O_WRONLY; |
| crflags = O_CREAT | O_TRUNC; |
| break; |
| case 'a': |
| rwflags = O_WRONLY; |
| crflags = O_CREAT | O_APPEND; |
| break; |
| case 'e': |
| eflag = O_CLOEXEC; |
| break; |
| case '+': |
| rwflags = O_RDWR; |
| break; |
| } |
| } |
| |
| return rwflags | crflags | eflag; |
| } |