diff options
| -rw-r--r-- | src/stdio/freopen.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/src/stdio/freopen.c b/src/stdio/freopen.c index e26f353f..2bb4420c 100644 --- a/src/stdio/freopen.c +++ b/src/stdio/freopen.c @@ -1,4 +1,5 @@ #include <stdio.h> +#include "string.h" #include "errno.h" #include "_stdio.h" @@ -12,10 +13,44 @@ /** reopen a file stream with a new file **/ FILE * freopen(const char * restrict filename, const char * restrict mode, FILE * restrict stream) { + struct { + char *smode; + int omode; + } modemap[] = { + { "r", O_RDONLY }, + { "rb", O_RDONLY }, + + { "w", O_WRONLY | O_CREAT | O_TRUNC }, + { "wb", O_WRONLY | O_CREAT | O_TRUNC }, + + { "a", O_WRONLY | O_CREAT | O_APPEND }, + { "ab", O_WRONLY | O_CREAT | O_APPEND }, + + { "r+", O_RDWR }, + { "rb+", O_RDWR }, + { "r+b", O_RDWR }, + + { "w+", O_RDWR | O_CREAT | O_TRUNC }, + { "wb+", O_RDWR | O_CREAT | O_TRUNC }, + { "w+b", O_RDWR | O_CREAT | O_TRUNC }, + + { "a+", O_RDWR | O_CREAT | O_APPEND }, + { "ab+", O_RDWR | O_CREAT | O_APPEND }, + { "a+b", O_RDWR | O_CREAT | O_APPEND }, + }; + int openmode = 0; + size_t i; + int fd = -1; + flockfile(stream); - (void)mode; - int openmode = 0; /* modetoflag(mode); */ + for (i = 0; i < sizeof(modemap) / sizeof(modemap[0]); i++) { + if (!strcmp(modemap[i].smode, mode)) { + openmode = modemap[i].omode; + break; + } + } + if (openmode == 0) { #ifdef EINVAL errno = EINVAL; @@ -23,7 +58,7 @@ FILE * freopen(const char * restrict filename, const char * restrict mode, FILE return NULL; } - int fd = open(filename, openmode, 0); + fd = open(filename, openmode, 0); if (fd == -1) { /* set errno */ return NULL; |