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libavutil: add avpriv_open() to open files with close-on-exec flag 

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Rémi Denis-Courmont 2013-08-06 21:19:24 +03:00 committed by Anton Khirnov
parent 22c879057e
commit 869b04e891
2 changed files with 29 additions and 1 deletions
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25
libavutil/file.c
View File

@ -18,8 +18,10 @@
#include "config.h"
#include "file.h"
#include "internal.h"
#include "log.h"
#include "mem.h"
#include <stdarg.h>
#include <fcntl.h>
#include <sys/stat.h>
#if HAVE_UNISTD_H
@ -34,6 +36,27 @@
#include <windows.h>
#endif
int avpriv_open(const char *filename, int flags, ...)
{
int fd;
unsigned int mode = 0;
va_list ap;
va_start(ap, flags);
if (flags & O_CREAT)
mode = va_arg(ap, unsigned int);
va_end(ap);
#ifdef O_CLOEXEC
flags |= O_CLOEXEC;
#endif
fd = open(filename, flags, mode);
if (fd != -1)
fcntl(fd, F_SETFD, FD_CLOEXEC);
return fd;
}
typedef struct {
const AVClass *class;
int log_offset;
@ -49,7 +72,7 @@ int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
int log_offset, void *log_ctx)
{
FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx };
int err, fd = open(filename, O_RDONLY);
int err, fd = avpriv_open(filename, O_RDONLY);
struct stat st;
av_unused void *ptr;
off_t off_size;

5
libavutil/internal.h
View File

@ -196,4 +196,9 @@ void avpriv_report_missing_feature(void *avc,
void avpriv_request_sample(void *avc,
const char *msg, ...) av_printf_format(2, 3);
/**
* A wrapper for open() setting O_CLOEXEC.
*/
int avpriv_open(const char *filename, int flags, ...);
#endif /* AVUTIL_INTERNAL_H */