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/* -----------------------------------------------------------------------------
*
* (c) The University of Glasgow 2002
*
* Definitions for package `unix' which are visible in Haskell land.
*
* ---------------------------------------------------------------------------*/
#include "HsUnix.h"
#ifdef HAVE_RTLDNEXT
void *__hsunix_rtldNext (void) {return RTLD_NEXT;}
#endif
#ifdef HAVE_RTLDDEFAULT
void *__hsunix_rtldDefault (void) {return RTLD_DEFAULT;}
#endif
#ifdef HAVE_PTSNAME
// On Linux (and others), <stdlib.h> needs to be included while
// `_XOPEN_SOURCE` is already defined. However, GHCs before GHC 8.0
// didn't do that yet for CApiFFI, so we need this workaround here.
char *__hsunix_ptsname(int fd)
{
return ptsname(fd);
}
int __hsunix_grantpt(int fd)
{
return grantpt(fd);
}
int __hsunix_unlockpt(int fd)
{
return unlockpt(fd);
}
#endif
// push a SVR4 STREAMS module; do nothing if STREAMS not available
int __hsunix_push_module(int fd, const char *module)
{
#if defined(I_PUSH) && !defined(HAVE_DEV_PTC)
return ioctl(fd, I_PUSH, module);
#else
return 0;
#endif
}
#ifdef HAVE_UNSETENV
int __hsunix_unsetenv(const char *name)
{
#ifdef UNSETENV_RETURNS_VOID
unsetenv(name);
return 0;
#else
return unsetenv(name);
#endif
}
#endif
/* A size that will contain many path names, but not necessarily all
* (PATH_MAX is not defined on systems with unlimited path length,
* e.g. the Hurd).
*/
HsInt __hsunix_long_path_size(void) {
#ifdef PATH_MAX
return PATH_MAX;
#else
return 4096;
#endif
}
/*
* read an entry from the directory stream; opt for the
* re-entrant friendly way of doing this, if available.
*/
int __hscore_readdir( DIR *dirPtr, struct dirent **pDirEnt )
{
#if HAVE_READDIR_R
struct dirent* p;
int res;
static unsigned int nm_max = (unsigned int)-1;
if (pDirEnt == NULL) {
return -1;
}
if (nm_max == (unsigned int)-1) {
#ifdef NAME_MAX
nm_max = NAME_MAX + 1;
#else
nm_max = pathconf(".", _PC_NAME_MAX);
if (nm_max == -1) { nm_max = 255; }
nm_max++;
#endif
}
p = (struct dirent*)malloc(sizeof(struct dirent) + nm_max);
if (p == NULL) return -1;
res = readdir_r(dirPtr, p, pDirEnt);
if (res != 0) {
*pDirEnt = NULL;
free(p);
}
else if (*pDirEnt == NULL) {
// end of stream
free(p);
}
return res;
#else
if (pDirEnt == NULL) {
return -1;
}
*pDirEnt = readdir(dirPtr);
if (*pDirEnt == NULL) {
return -1;
} else {
return 0;
}
#endif
}
char *__hscore_d_name( struct dirent* d )
{
return (d->d_name);
}
void __hscore_free_dirent(struct dirent *dEnt)
{
#if HAVE_READDIR_R
free(dEnt);
#endif
}
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