mirrors/musl
1
0
Fork 0
mirror of https://git.musl-libc.org/git/musl synced 2025-02-21 04:34:18 +03:00
Code Issues Packages Projects Releases Wiki Activity

add 'e' modifier (close-on-exec) to fopen and fdopen

Browse Source 
this feature will be in the next version of POSIX, and can be used
internally immediately. there are many internal uses of fopen where
close-on-exec is needed to fix bugs.
This commit is contained in:
Rich Felker 2012-09-29 18:09:34 -04:00
parent f2d08cf755
commit 8582a6e9f2
2 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/stdio/__fdopen.c
View File

@ -4,7 +4,6 @@ FILE *__fdopen(int fd, const char *mode)
{
FILE *f;
struct termios tio;
int plus = !!strchr(mode, '+');
/* Check for valid initial mode character */
if (!strchr("rwa", *mode)) {
@ -19,7 +18,10 @@ FILE *__fdopen(int fd, const char *mode)
memset(f, 0, sizeof *f);
/* Impose mode restrictions */
if (!plus) f->flags = (*mode == 'r') ? F_NOWR : F_NORD;
if (!strchr(mode, '+')) f->flags = (*mode == 'r') ? F_NOWR : F_NORD;
/* Apply close-on-exec flag */
if (strchr(mode, 'e')) __syscall(SYS_fcntl, fd, F_SETFD, FD_CLOEXEC);
/* Set append mode on fd if opened for append */
if (*mode == 'a') {

1
src/stdio/fopen.c
View File

@ -17,6 +17,7 @@ FILE *fopen(const char *restrict filename, const char *restrict mode)
else if (*mode == 'r') flags = O_RDONLY;
else flags = O_WRONLY;
if (strchr(mode, 'x')) flags |= O_EXCL;
if (strchr(mode, 'e')) flags |= O_CLOEXEC;
if (*mode != 'r') flags |= O_CREAT;
if (*mode == 'w') flags |= O_TRUNC;
if (*mode == 'a') flags |= O_APPEND;