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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "avutil.h"
#include "file_open.h"
#include "mem.h"
#include <stdarg.h>
#include <fcntl.h>
#include <sys/stat.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_IO_H
#include <io.h>
#endif
#ifdef _WIN32
#undef open
#undef lseek
#undef stat
#undef fstat
#include <windows.h>
#include <share.h>
#include <errno.h>
#include "wchar_filename.h"
static int win32_open(const char *filename_utf8, int oflag, int pmode)
{
int fd;
wchar_t *filename_w;
/* convert UTF-8 to wide chars */
if (get_extended_win32_path(filename_utf8, &filename_w))
return -1;
if (!filename_w)
goto fallback;
fd = _wsopen(filename_w, oflag, SH_DENYNO, pmode);
av_freep(&filename_w);
if (fd != -1 || (oflag & O_CREAT))
return fd;
fallback:
/* filename may be in CP_ACP */
return _sopen(filename_utf8, oflag, SH_DENYNO, pmode);
}
#define open win32_open
#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
#ifdef O_NOINHERIT
flags |= O_NOINHERIT;
#endif
fd = open(filename, flags, mode);
#if HAVE_FCNTL
if (fd != -1) {
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
av_log(NULL, AV_LOG_DEBUG, "Failed to set close on exec\n");
}
#endif
return fd;
}
typedef struct FileLogContext {
const AVClass *class;
int log_offset;
void *log_ctx;
} FileLogContext;
static const AVClass file_log_ctx_class = {
.class_name = "TEMPFILE",
.item_name = av_default_item_name,
.option = NULL,
.version = LIBAVUTIL_VERSION_INT,
.log_level_offset_offset = offsetof(FileLogContext, log_offset),
.parent_log_context_offset = offsetof(FileLogContext, log_ctx),
};
int avpriv_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx)
{
FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx };
int fd = -1;
#if HAVE_MKSTEMP
size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
*filename = av_malloc(len);
#elif HAVE_TEMPNAM
void *ptr= tempnam(NULL, prefix);
if(!ptr)
ptr= tempnam(".", prefix);
*filename = av_strdup(ptr);
#undef free
free(ptr);
#else
return AVERROR(ENOSYS);
#endif
/* -----common section-----*/
if (!*filename) {
av_log(&file_log_ctx, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
return AVERROR(ENOMEM);
}
#if !HAVE_MKSTEMP
# ifndef O_BINARY
# define O_BINARY 0
# endif
# ifndef O_EXCL
# define O_EXCL 0
# endif
fd = open(*filename, O_RDWR | O_BINARY | O_CREAT | O_EXCL, 0600);
#else
snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
fd = mkstemp(*filename);
#if defined(_WIN32) || defined (__ANDROID__) || defined(__DJGPP__)
if (fd < 0) {
snprintf(*filename, len, "./%sXXXXXX", prefix);
fd = mkstemp(*filename);
}
#endif
#endif
/* -----common section-----*/
if (fd < 0) {
int err = AVERROR(errno);
av_log(&file_log_ctx, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
av_freep(filename);
return err;
}
return fd; /* success */
}
FILE *avpriv_fopen_utf8(const char *path, const char *mode)
{
int fd;
int access;
const char *m = mode;
switch (*m++) {
case 'r': access = O_RDONLY; break;
case 'w': access = O_CREAT|O_WRONLY|O_TRUNC; break;
case 'a': access = O_CREAT|O_WRONLY|O_APPEND; break;
default :
errno = EINVAL;
return NULL;
}
while (*m) {
if (*m == '+') {
access &= ~(O_RDONLY | O_WRONLY);
access |= O_RDWR;
} else if (*m == 'b') {
#ifdef O_BINARY
access |= O_BINARY;
#endif
} else if (*m) {
errno = EINVAL;
return NULL;
}
m++;
}
fd = avpriv_open(path, access, 0666);
if (fd == -1)
return NULL;
return fdopen(fd, mode);
}
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