/*

* Unix support routines for PhysicsFS.

*

* Please see the file LICENSE in the source's root directory.

*

* This file written by Ryan C. Gordon.

*/

#if HAVE_CONFIG_H

# include <config.h>

#endif

/* BeOS uses beos.cpp and posix.c ... Cygwin and such use win32.c ... */

#if ((!defined __BEOS__) && (!defined WIN32))

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#include <unistd.h>

#include <sys/types.h>

#include <pwd.h>

#include <sys/stat.h>

#include <dirent.h>

#include <time.h>

#include <errno.h>

#ifdef PHYSFS_HAVE_SYS_UCRED_H

# ifdef PHYSFS_HAVE_MNTENT_H

# undef PHYSFS_HAVE_MNTENT_H /* don't do both... */

# endif

# include <sys/ucred.h>

#ifdef PHYSFS_HAVE_MNTENT_H

#include <mntent.h>

#endif

#define __PHYSICSFS_INTERNAL__

#include "physfs_internal.h"

const char *__PHYSFS_platformDirSeparator = "/";

int __PHYSFS_platformInit(void)

{

return(1); /* always succeed. */

} /* __PHYSFS_platformInit */

int __PHYSFS_platformDeinit(void)

{

return(1); /* always succeed. */

} /* __PHYSFS_platformDeinit */

#ifdef PHYSFS_NO_CDROM_SUPPORT

/* Stub version for platforms without CD-ROM support. */

char **__PHYSFS_platformDetectAvailableCDs(void)

{

char **retval = (char **) malloc(sizeof (char *));

BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);

*retval = NULL;

return(retval);

} /* __PHYSFS_platformDetectAvailableCDs */

#else

char **__PHYSFS_platformDetectAvailableCDs(void)

{

char **retval = (char **) malloc(sizeof (char *));

int cd_count = 1; /* We count the NULL entry. */

BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);

for (i = 0; i < mounts; i++)

{

int add_it = 0;

/* add other mount types here */

if (add_it)

{

if (tmp)

{

retval = tmp;

cd_count++;

} /* if */

} /* if */

} /* if */

retval[cd_count - 1] = NULL;

return(retval);

} /* __PHYSFS_platformDetectAvailableCDs */

char **__PHYSFS_platformDetectAvailableCDs(void)

{

char **retval = (char **) malloc(sizeof (char *));

int cd_count = 1; /* We count the NULL entry. */

FILE *mounts = NULL;

struct mntent *ent = NULL;

BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);

*retval = NULL;

mounts = setmntent("/etc/mtab", "r");

BAIL_IF_MACRO(mounts == NULL, ERR_IO_ERROR, retval);

while ( (ent = getmntent(mounts)) != NULL )

{

int add_it = 0;

if (strcmp(ent->mnt_type, "iso9660") == 0)

add_it = 1;

/* add other mount types here */

if (add_it)

{

if (tmp)

{

retval = tmp;

retval[cd_count-1] = (char *) malloc(strlen(ent->mnt_dir) + 1);

cd_count++;

} /* if */

} /* if */

} /* if */

} /* while */

endmntent(mounts);

} /* __PHYSFS_platformDetectAvailableCDs */

#endif

#endif /* !PHYSFS_NO_CDROM_SUPPORT */

/* this is in posix.c ... */

extern char *__PHYSFS_platformCopyEnvironmentVariable(const char *varname);

/*

* See where program (bin) resides in the $PATH specified by (envr).

* returns a copy of the first element in envr that contains it, or NULL

* if it doesn't exist or there were other problems. PHYSFS_SetError() is

* called if we have a problem.

*

* (envr) will be scribbled over, and you are expected to free() the

* return value when you're done with it.

*/

static char *findBinaryInPath(const char *bin, char *envr)

size_t alloc_size = 0;

char *exe = NULL;

char *start = envr;

char *ptr;

BAIL_IF_MACRO(bin == NULL, ERR_INVALID_ARGUMENT, NULL);

BAIL_IF_MACRO(envr == NULL, ERR_INVALID_ARGUMENT, NULL);

do

{

size_t size;

ptr = strchr(start, ':'); /* find next $PATH separator. */

if (ptr)

*ptr = '\0';

size = strlen(start) + strlen(bin) + 2;

if (size > alloc_size)

char *x = (char *) realloc(exe, size);

if (x == NULL)

{

if (exe != NULL)

free(exe);

BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);

} /* if */

alloc_size = size;

exe = x;

/* build full binary path... */

if (exe[strlen(exe) - 1] != '/')

strcat(exe, "/");

strcat(exe, bin);

if (access(exe, X_OK) == 0) /* Exists as executable? We're done. */

strcpy(exe, start); /* i'm lazy. piss off. */

return(exe);

} /* if */

} while (ptr != NULL);

if (exe != NULL)

free(exe);

return(NULL); /* doesn't exist in path. */

} /* findBinaryInPath */

char *__PHYSFS_platformCalcBaseDir(const char *argv0)

{

/* If there isn't a path on argv0, then look through the $PATH for it. */

char *retval;

char *envr;

if (strchr(argv0, '/') != NULL) /* default behaviour can handle this. */

return(NULL);

BAIL_IF_MACRO(!envr, NULL, NULL);

retval = findBinaryInPath(argv0, envr);

free(envr);

return(retval);

} /* __PHYSFS_platformCalcBaseDir */

} /* __PHYSFS_platformGetThreadID */

/* Much like my college days, try to sleep for 10 milliseconds at a time... */

void __PHYSFS_platformTimeslice(void)

{

} /* __PHYSFS_platformTimeslice */

char *__PHYSFS_platformRealPath(const char *path)

{

char resolved_path[MAXPATHLEN];

char *retval = NULL;

errno = 0;

BAIL_IF_MACRO(!realpath(path, resolved_path), strerror(errno), NULL);

BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);

strcpy(retval, resolved_path);

return(retval);

} /* __PHYSFS_platformRealPath */

void *__PHYSFS_platformCreateMutex(void)

{

int rc;

pthread_mutex_t *m = (pthread_mutex_t *) malloc(sizeof (pthread_mutex_t));

BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, NULL);

rc = pthread_mutex_init(m, NULL);

if (rc != 0)

{

free(m);

BAIL_MACRO(strerror(rc), NULL);

} /* if */

return((void *) m);

} /* __PHYSFS_platformCreateMutex */

void __PHYSFS_platformDestroyMutex(void *mutex)

{

pthread_mutex_destroy((pthread_mutex_t *) mutex);

free(mutex);

} /* __PHYSFS_platformDestroyMutex */

int __PHYSFS_platformGrabMutex(void *mutex)

{

return(pthread_mutex_lock((pthread_mutex_t *) mutex) == 0);

} /* __PHYSFS_platformGrabMutex */

void __PHYSFS_platformReleaseMutex(void *mutex)

{

pthread_mutex_unlock((pthread_mutex_t *) mutex);

} /* __PHYSFS_platformReleaseMutex */