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%
% (c) The GRASP/AQUA Project, Glasgow University, 1994
%
\subsection[fileSize.lc]{hfileSize Runtime Support}
\begin{code}
#include "rtsdefs.h"
#include "stgio.h"
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
StgInt
fileSize(fp, result)
StgAddr fp;
StgByteArray result;
{
struct stat sb;
while (fstat(fileno((FILE *) fp), &sb) < 0) {
/* highly unlikely */
if (errno != EINTR) {
cvtErrno();
stdErrno();
return -1;
}
}
if (S_ISREG(sb.st_mode)) {
/* result will be word aligned */
*(off_t *) result = sb.st_size;
return 0;
} else {
ghc_errtype = ERR_INAPPROPRIATETYPE;
ghc_errstr = "not a regular file";
return -1;
}
}
\end{code}
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