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%
% (c) The GRASP/AQUA Project, Glasgow University, 1995
%
\subsection[getCurrentDirectory.lc]{getCurrentDirectory Runtime Support}
\begin{code}
#include "rtsdefs.h"
#include "stgio.h"
#ifndef PATH_MAX
#ifdef MAXPATHLEN
#define PATH_MAX MAXPATHLEN
#else
#define PATH_MAX 1024
#endif
#endif
StgAddr
getCurrentDirectory(STG_NO_ARGS)
{
char *pwd;
int alloc;
alloc = PATH_MAX;
if ((pwd = malloc(alloc)) == NULL) {
ghc_errtype = ERR_RESOURCEEXHAUSTED;
ghc_errstr = "not enough virtual memory";
return NULL;
}
while (getcwd(pwd, alloc) == NULL) {
if (errno == ERANGE) {
alloc += PATH_MAX;
if ((pwd = realloc(pwd, alloc)) == NULL) {
ghc_errtype = ERR_RESOURCEEXHAUSTED;
ghc_errstr = "not enough virtual memory";
return NULL;
}
} else if (errno != EINTR) {
cvtErrno();
stdErrno();
return NULL;
}
}
return (StgAddr) pwd;
}
\end{code}
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