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file: fix file_check() 

Fixes Ticket1904

This should work on windows, but if not please contact me ASAP
i have another idea on how to solve this without access() if that
really doesnt work on windows.

Strongly based on patch by divVerent
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-27 02:57:20 +01:00
parent 109268c826
commit 407921072f
1 changed files with 8 additions and 7 deletions
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15
libavformat/file.c
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@ -85,14 +85,15 @@ static int file_get_handle(URLContext *h)
static int file_check(URLContext *h, int mask)
{
struct stat st;
int ret = stat(h->filename, &st);
if (ret < 0)
int ret = 0;
if (access(h->filename, F_OK) < 0)
return AVERROR(errno);
ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ : 0;
ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
if (mask&AVIO_FLAG_READ)
if (access(h->filename, R_OK) >= 0)
ret |= AVIO_FLAG_READ;
if (mask&AVIO_FLAG_WRITE)
if (access(h->filename, W_OK) >= 0)
ret |= AVIO_FLAG_WRITE;
return ret;
}