platform/unix.c
author Ryan C. Gordon <icculus@icculus.org>
Sat, 20 Jul 2002 00:19:53 +0000
changeset 351 bc4fa7896225
parent 347 56ce50a62241
child 381 b65d27fdc8a9
permissions -rw-r--r--
Generalized CD-ROM routine selection.
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/*
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 * Unix support routines for PhysicsFS.
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 *
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 * Please see the file LICENSE in the source's root directory.
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 *
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 *  This file written by Ryan C. Gordon.
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 */
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#if HAVE_CONFIG_H
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#  include <config.h>
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#endif
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/* BeOS uses beos.cpp and posix.c ... Cygwin and such use win32.c ... */
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#if ((!defined __BEOS__) && (!defined WIN32))
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <dirent.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/mount.h>
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#ifdef PHYSFS_HAVE_SYS_UCRED_H
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#  ifdef PHYSFS_HAVE_MNTENT_H
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#    undef PHYSFS_HAVE_MNTENT_H /* don't do both... */
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#  endif
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#  include <sys/ucred.h>
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#endif
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#ifdef PHYSFS_HAVE_MNTENT_H
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#include <mntent.h>
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#endif
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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const char *__PHYSFS_platformDirSeparator = "/";
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int __PHYSFS_platformInit(void)
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{
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    return(1);  /* always succeed. */
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} /* __PHYSFS_platformInit */
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int __PHYSFS_platformDeinit(void)
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{
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    return(1);  /* always succeed. */
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} /* __PHYSFS_platformDeinit */
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#ifdef PHYSFS_HAVE_SYS_UCRED_H
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char **__PHYSFS_platformDetectAvailableCDs(void)
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{
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    char **retval = (char **) malloc(sizeof (char *));
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    int cd_count = 1;  /* We count the NULL entry. */
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    struct statfs* mntbufp = NULL;
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    int mounts;
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    int ii;
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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    mounts = getmntinfo( &mntbufp, MNT_WAIT );
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    for ( ii=0; ii < mounts; ++ii ) {
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        int add_it = 0;
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        if ( strcmp( mntbufp[ii].f_fstypename, "iso9660") == 0 )
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            add_it = 1;
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        else if ( strcmp( mntbufp[ii].f_fstypename, "cd9660") == 0 )
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            add_it = 1;
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        /* add other mount types here */
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        if (add_it)
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        {
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            char **tmp = realloc(retval, sizeof (char *) * (cd_count + 1));
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            if (tmp)
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            {
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                retval = tmp;
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                retval[cd_count - 1] = (char *)
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                                malloc(strlen(mntbufp[ii].f_mntonname) + 1);
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                if (retval[cd_count - 1])
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                {
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                    strcpy(retval[cd_count - 1], mntbufp[ii].f_mntonname);
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                    cd_count++;
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                } /* if */
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            } /* if */
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        } /* if */
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    }
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    retval[cd_count - 1] = NULL;
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    return(retval);
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} /* __PHYSFS_platformDetectAvailableCDs */
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#endif
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#ifdef PHYSFS_HAVE_MNTENT_H
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char **__PHYSFS_platformDetectAvailableCDs(void)
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{
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    char **retval = (char **) malloc(sizeof (char *));
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    int cd_count = 1;  /* We count the NULL entry. */
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    FILE *mounts = NULL;
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    struct mntent *ent = NULL;
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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    *retval = NULL;
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    mounts = setmntent("/etc/mtab", "r");
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    BAIL_IF_MACRO(mounts == NULL, ERR_IO_ERROR, retval);
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    while ( (ent = getmntent(mounts)) != NULL )
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    {
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        int add_it = 0;
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        if (strcmp(ent->mnt_type, "iso9660") == 0)
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            add_it = 1;
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        /* add other mount types here */
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        if (add_it)
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        {
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            char **tmp = realloc(retval, sizeof (char *) * (cd_count + 1));
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            if (tmp)
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            {
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                retval = tmp;
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                retval[cd_count-1] = (char *) malloc(strlen(ent->mnt_dir) + 1);
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                if (retval[cd_count - 1])
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                {
316
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                    strcpy(retval[cd_count - 1], ent->mnt_dir);
63
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                    cd_count++;
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                } /* if */
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            } /* if */
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        } /* if */
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    } /* while */
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    endmntent(mounts);
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    retval[cd_count - 1] = NULL;
20
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    return(retval);
117
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} /* __PHYSFS_platformDetectAvailableCDs */
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#endif
17
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233
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/* this is in posix.c ... */
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   159
extern char *__PHYSFS_platformCopyEnvironmentVariable(const char *varname);
20
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225
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/*
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 * See where program (bin) resides in the $PATH specified by (envr).
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 *  returns a copy of the first element in envr that contains it, or NULL
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 *  if it doesn't exist or there were other problems. PHYSFS_SetError() is
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 *  called if we have a problem.
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 *
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 * (envr) will be scribbled over, and you are expected to free() the
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 *  return value when you're done with it.
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 */
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static char *findBinaryInPath(const char *bin, char *envr)
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{
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    size_t alloc_size = 0;
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    char *exe = NULL;
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    char *start = envr;
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    char *ptr;
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   177
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    BAIL_IF_MACRO(bin == NULL, ERR_INVALID_ARGUMENT, NULL);
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    BAIL_IF_MACRO(envr == NULL, ERR_INVALID_ARGUMENT, NULL);
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   180
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    do
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    {
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        size_t size;
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        ptr = strchr(start, ':');  /* find next $PATH separator. */
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        if (ptr)
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            *ptr = '\0';
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   187
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        size = strlen(start) + strlen(bin) + 2;
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        if (size > alloc_size)
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        {
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            char *x = (char *) realloc(exe, size);
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            if (x == NULL)
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            {
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                if (exe != NULL)
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                    free(exe);
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                BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
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            } /* if */
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   198
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            alloc_size = size;
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            exe = x;
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   201
        } /* if */
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   202
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        /* build full binary path... */
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        strcpy(exe, start);
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        if (exe[strlen(exe) - 1] != '/')
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            strcat(exe, "/");
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        strcat(exe, bin);
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   208
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        if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
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        {
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            strcpy(exe, start);  /* i'm lazy. piss off. */
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            return(exe);
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   213
        } /* if */
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   214
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        start = ptr + 1;  /* start points to beginning of next element. */
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   216
    } while (ptr != NULL);
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   217
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    if (exe != NULL)
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        free(exe);
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    return(NULL);  /* doesn't exist in path. */
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   222
} /* findBinaryInPath */
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   223
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23
bd6ba9c8717c Initial debugging: dropped PhysicsFS routines into the Build engine,
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char *__PHYSFS_platformCalcBaseDir(const char *argv0)
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{
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    /* If there isn't a path on argv0, then look through the $PATH for it. */
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225
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    char *retval;
23
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    char *envr;
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   232
    if (strchr(argv0, '/') != NULL)   /* default behaviour can handle this. */
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        return(NULL);
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   234
233
1b74a7df1ca6 Split some of the unix.c code out to posix.c for BeOS to use.
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    envr = __PHYSFS_platformCopyEnvironmentVariable("PATH");
23
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    BAIL_IF_MACRO(!envr, NULL, NULL);
225
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    retval = findBinaryInPath(argv0, envr);
23
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    free(envr);
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   239
    return(retval);
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   240
} /* __PHYSFS_platformCalcBaseDir */
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   241
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   242
132
b53fa5093749 Added typedefs and platform-specific i/o.
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   243
PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
17
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   244
{
188
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   245
    return((PHYSFS_uint64) ((PHYSFS_uint32) pthread_self()));
17
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} /* __PHYSFS_platformGetThreadID */
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20
efdde0d21521 Implementation compiles and links with no actual archive support. No test
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   249
/* Much like my college days, try to sleep for 10 milliseconds at a time... */
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   250
void __PHYSFS_platformTimeslice(void)
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   251
{
115
c0671785777b Changed timeslice implementation to use something more portable (thanks to
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   252
    usleep( 10 * 1000 );           /* don't care if it fails. */
20
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   253
} /* __PHYSFS_platformTimeslice */
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39
bc29e1ee7ef6 Lots of bugfixes, enhancements, and corrections due to the work on
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   256
char *__PHYSFS_platformRealPath(const char *path)
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{
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   258
    char resolved_path[MAXPATHLEN];
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   259
    char *retval = NULL;
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   260
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   261
    errno = 0;
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   262
    BAIL_IF_MACRO(!realpath(path, resolved_path), strerror(errno), NULL);
233
1b74a7df1ca6 Split some of the unix.c code out to posix.c for BeOS to use.
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   263
    retval = (char *) malloc(strlen(resolved_path) + 1);
39
bc29e1ee7ef6 Lots of bugfixes, enhancements, and corrections due to the work on
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   264
    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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   265
    strcpy(retval, resolved_path);
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   266
    return(retval);
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   267
} /* __PHYSFS_platformRealPath */
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   268
69
546a95cc5591 Updates, corrections and enhancements to get this ported to win32.
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   269
145
d6385584f6c4 First shot at thread-safety.
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   270
void *__PHYSFS_platformCreateMutex(void)
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   271
{
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   272
    int rc;
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   273
    pthread_mutex_t *m = (pthread_mutex_t *) malloc(sizeof (pthread_mutex_t));
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   274
    BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, NULL);
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   275
    rc = pthread_mutex_init(m, NULL);
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   276
    if (rc != 0)
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   277
    {
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   278
        free(m);
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   279
        BAIL_MACRO(strerror(rc), NULL);
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   280
    } /* if */
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   281
d6385584f6c4 First shot at thread-safety.
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   282
    return((void *) m);
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diff changeset
   283
} /* __PHYSFS_platformCreateMutex */
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void __PHYSFS_platformDestroyMutex(void *mutex)
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{
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    pthread_mutex_destroy((pthread_mutex_t *) mutex);
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    free(mutex);
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} /* __PHYSFS_platformDestroyMutex */
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int __PHYSFS_platformGrabMutex(void *mutex)
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{
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    return(pthread_mutex_lock((pthread_mutex_t *) mutex) == 0);    
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} /* __PHYSFS_platformGrabMutex */
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void __PHYSFS_platformReleaseMutex(void *mutex)
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{
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    pthread_mutex_unlock((pthread_mutex_t *) mutex);
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} /* __PHYSFS_platformReleaseMutex */
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#endif /* !defined __BEOS__ && !defined WIN32 */
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/* end of unix.c ... */
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