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Merge pull request #82 from nretro/master

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get size of special file by calling ioctl
This commit is contained in:
sorgelig
2019-05-26 18:23:52 +08:00
committed by GitHub
parent 616ee67bd2 790722c920
commit e4241f3dbf
1 changed files with 17 additions and 3 deletions
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20
file_io.cpp
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@@ -11,6 +11,8 @@
#include <ctype.h>
#include <sys/vfs.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <linux/magic.h>
#include <algorithm>
#include <vector>
@@ -320,14 +322,26 @@ int FileOpenEx(fileTYPE *file, const char *name, int mode, char mute)
FileClose(file);
return 0;
}
file->size = st.st_size;
if ((st.st_rdev != 0) && (st.st_size == 0)) //for special files we need an ioctl call to get the correct size
{
unsigned long long blksize;
int ret = ioctl(fd, BLKGETSIZE64, &blksize);
if (ret < 0 )
{
if (!mute) printf("FileOpenEx(ioctl) File:%s, error: %d.\n", full_path, ret);
FileClose(file);
return 0;
}
file->size = blksize;
}
else
file->size = st.st_size;
file->offset = 0;
file->mode = mode;
}
}
//printf("opened %s, size %lu\n", full_path, file->size);
//printf("opened %s, size %llu\n", full_path, file->size);
return 1;
}