platform/unix.c
author Ryan C. Gordon <icculus@icculus.org>
Wed, 21 Mar 2007 05:03:17 +0000
changeset 847 5e5e6c067413
parent 846 df684fce470e
child 889 0364fa566f29
permissions -rw-r--r--
Split out Mac OS X code from unix.c and added some Carbon-specific code... moved some stuff around and implemented a few things in BeOS and POSIX bits to accomodate this.
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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.txt 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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#define __PHYSICSFS_INTERNAL__
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#include "physfs_platforms.h"
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#ifdef PHYSFS_PLATFORM_UNIX
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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 <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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#if (!defined PHYSFS_NO_PTHREADS_SUPPORT)
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#include <pthread.h>
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#endif
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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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#include "physfs_internal.h"
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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_NO_CDROM_SUPPORT
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/* Stub version for platforms without CD-ROM support. */
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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} /* __PHYSFS_platformDetectAvailableCDs */
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#elif (defined PHYSFS_HAVE_SYS_UCRED_H)
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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    int i;
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    struct statfs *mntbufp = NULL;
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    int mounts = getmntinfo(&mntbufp, MNT_WAIT);
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    for (i = 0; i < mounts; i++)
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    {
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        int add_it = 0;
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        if (strcmp(mntbufp[i].f_fstypename, "iso9660") == 0)
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            add_it = 1;
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        else if (strcmp( mntbufp[i].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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            cb(data, mntbufp[i].f_mntonname);
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    } /* for */
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} /* __PHYSFS_platformDetectAvailableCDs */
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#elif (defined PHYSFS_HAVE_MNTENT_H)
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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    FILE *mounts = NULL;
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    struct mntent *ent = NULL;
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    mounts = setmntent("/etc/mtab", "r");
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    BAIL_IF_MACRO(mounts == NULL, ERR_IO_ERROR, /*return void*/);
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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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            cb(data, ent->mnt_dir);
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    } /* while */
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    endmntent(mounts);
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} /* __PHYSFS_platformDetectAvailableCDs */
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#endif
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/* this is in posix.c ... */
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extern char *__PHYSFS_platformCopyEnvironmentVariable(const char *varname);
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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 allocator.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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   137
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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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    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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   147
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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 *) allocator.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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                    allocator.Free(exe);
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                BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
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            } /* if */
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   158
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            alloc_size = size;
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            exe = x;
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        } /* if */
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   162
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        /* build full binary path... */
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        strcpy(exe, start);
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        if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
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            strcat(exe, "/");
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        strcat(exe, bin);
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   168
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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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        } /* if */
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   174
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        start = ptr + 1;  /* start points to beginning of next element. */
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    } while (ptr != NULL);
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    if (exe != NULL)
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        allocator.Free(exe);
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   180
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    return(NULL);  /* doesn't exist in path. */
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} /* findBinaryInPath */
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   183
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char *__PHYSFS_platformCalcBaseDir(const char *argv0)
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{
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    const char *PROC_SELF_EXE = "/proc/self/exe";
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    char *retval = NULL;
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    char *envr = NULL;
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    struct stat stbuf;
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    /* fast path: default behaviour can handle this. */
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    if ( (argv0 != NULL) && (strchr(argv0, '/') != NULL) )
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        return(NULL);  /* higher level will parse out real path from argv0. */
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    /*
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     * Try to avoid using argv0 unless forced to. If there's a Linux-like
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     *  /proc filesystem, you can get the full path to the current process from
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     *  the /proc/self/exe symlink.
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     */
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    if ((lstat(PROC_SELF_EXE, &stbuf) != -1) && (S_ISLNK(stbuf.st_mode)))
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    {
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        const size_t len = stbuf.st_size;
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        char *buf = (char *) allocator.Malloc(len+1);
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        if (buf != NULL)  /* if NULL, maybe you'll get lucky later. */
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        {
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            if (readlink(PROC_SELF_EXE, buf, len) != len)
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                allocator.Free(buf);
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            else
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            {
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                buf[len] = '\0';  /* readlink doesn't null-terminate. */
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                retval = buf;  /* we're good to go. */
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            } /* else */
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        } /* if */
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    } /* if */
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840
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    if ((retval == NULL) && (argv0 != NULL))
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    {
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        /* If there's no dirsep on argv0, then look through $PATH for it. */
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        envr = __PHYSFS_platformCopyEnvironmentVariable("PATH");
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        BAIL_IF_MACRO(!envr, NULL, NULL);
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        retval = findBinaryInPath(argv0, envr);
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        allocator.Free(envr);
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   224
    } /* if */
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   225
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    return(retval);
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} /* __PHYSFS_platformCalcBaseDir */
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39
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char *__PHYSFS_platformRealPath(const char *path)
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{
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    char resolved_path[MAXPATHLEN];
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    char *retval = NULL;
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   234
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    errno = 0;
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    BAIL_IF_MACRO(!realpath(path, resolved_path), strerror(errno), NULL);
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    retval = (char *) allocator.Malloc(strlen(resolved_path) + 1);
39
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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    strcpy(retval, resolved_path);
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a72bbf255074 Added hack for OSX bundles, from Eric Wing.
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39
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    return(retval);
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} /* __PHYSFS_platformRealPath */
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   243
69
546a95cc5591 Updates, corrections and enhancements to get this ported to win32.
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   244
847
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char *__PHYSFS_platformCurrentDir(void)
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{
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   247
    /*
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     * This can't just do platformRealPath("."), since that would eventually
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     *  just end up calling back into here.
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     */
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   251
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    int allocSize = 0;
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    char *retval = NULL;
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    char *ptr;
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   255
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    do
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    {
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   258
        allocSize += 100;
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        ptr = (char *) allocator.Realloc(retval, allocSize);
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        if (ptr == NULL)
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   261
        {
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   262
            if (retval != NULL)
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   263
                allocator.Free(retval);
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   264
            BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
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        } /* if */
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        retval = ptr;
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        ptr = getcwd(retval, allocSize);
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    } while (ptr == NULL && errno == ERANGE);
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    if (ptr == NULL && errno)
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    {
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            /*
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             * getcwd() failed for some reason, for example current
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             * directory not existing.
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             */
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        if (retval != NULL)
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            allocator.Free(retval);
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        BAIL_MACRO(ERR_NO_SUCH_FILE, NULL);
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    } /* if */
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    return(retval);
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} /* __PHYSFS_platformCurrentDir */
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845
3f150ffcf50c Since all the platform layers were using the same cut-and-paste of the
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int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
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{
3f150ffcf50c Since all the platform layers were using the same cut-and-paste of the
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    return(0);  /* just use malloc() and friends. */
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} /* __PHYSFS_platformSetDefaultAllocator */
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846
df684fce470e Replaced manual management of recursive pthread mutexes with
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396
15f7ccfdd89f Whoops; the pthread-disabling condition was flipped. Fixed.
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#if (defined PHYSFS_NO_PTHREADS_SUPPORT)
390
6649d6caecf2 Stub code for platforms without functional pthreads.
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PHYSFS_uint64 __PHYSFS_platformGetThreadID(void) { return(0x0001); }
6649d6caecf2 Stub code for platforms without functional pthreads.
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void *__PHYSFS_platformCreateMutex(void) { return((void *) 0x0001); }
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void __PHYSFS_platformDestroyMutex(void *mutex) {}
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int __PHYSFS_platformGrabMutex(void *mutex) { return(1); }
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void __PHYSFS_platformReleaseMutex(void *mutex) {}
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#else
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452
89578e99ba6e Attempt to fix pthread-to-ui64 cast issue.
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/* Just in case; this is a panic value. */
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#if ((!defined SIZEOF_INT) || (SIZEOF_INT <= 0))
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#  define SIZEOF_INT 4
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   306
#endif
89578e99ba6e Attempt to fix pthread-to-ui64 cast issue.
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   307
89578e99ba6e Attempt to fix pthread-to-ui64 cast issue.
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   308
#if (SIZEOF_INT == 4)
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#  define PHTREAD_TO_UI64(thr) ( (PHYSFS_uint64) ((PHYSFS_uint32) (thr)) )
89578e99ba6e Attempt to fix pthread-to-ui64 cast issue.
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#elif (SIZEOF_INT == 2)
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#  define PHTREAD_TO_UI64(thr) ( (PHYSFS_uint64) ((PHYSFS_uint16) (thr)) )
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   312
#elif (SIZEOF_INT == 1)
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   313
#  define PHTREAD_TO_UI64(thr) ( (PHYSFS_uint64) ((PHYSFS_uint8) (thr)) )
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   314
#else
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   315
#  define PHTREAD_TO_UI64(thr) ((PHYSFS_uint64) (thr))
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   316
#endif
392
bcc8e4dca868 First step towards getting __PHYSFS_platformGetThreadID() to work universally.
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   317
390
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PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
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   319
{
392
bcc8e4dca868 First step towards getting __PHYSFS_platformGetThreadID() to work universally.
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   320
    return(PHTREAD_TO_UI64(pthread_self()));
390
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   321
} /* __PHYSFS_platformGetThreadID */
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   322
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   323
145
d6385584f6c4 First shot at thread-safety.
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   324
void *__PHYSFS_platformCreateMutex(void)
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   325
{
846
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   326
    pthread_mutex_t *m = NULL;
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   327
    pthread_mutexattr_t attr;
145
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   328
    int rc;
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   329
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   330
    rc = pthread_mutexattr_init(&attr);
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   331
    if (rc == 0)
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   332
    {
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   333
        rc = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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diff changeset
   334
        if (rc == 0)
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diff changeset
   335
        {
df684fce470e Replaced manual management of recursive pthread mutexes with
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   336
            m = (pthread_mutex_t *) allocator.Malloc(sizeof (pthread_mutex_t));
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   337
            if (m == NULL)
df684fce470e Replaced manual management of recursive pthread mutexes with
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   338
                rc = ENOMEM;
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   339
            else
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   340
                rc = pthread_mutex_init(m, &attr);
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   341
        } /* if */
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   342
        pthread_mutexattr_destroy(&attr);
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diff changeset
   343
    } /* if */
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   344
145
d6385584f6c4 First shot at thread-safety.
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diff changeset
   345
    if (rc != 0)
d6385584f6c4 First shot at thread-safety.
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diff changeset
   346
    {
691
71d9affe0d8a All memory management now goes through allocation hooks instead of directly to
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diff changeset
   347
        allocator.Free(m);
145
d6385584f6c4 First shot at thread-safety.
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diff changeset
   348
        BAIL_MACRO(strerror(rc), NULL);
d6385584f6c4 First shot at thread-safety.
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diff changeset
   349
    } /* if */
d6385584f6c4 First shot at thread-safety.
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diff changeset
   350
d6385584f6c4 First shot at thread-safety.
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diff changeset
   351
    return((void *) m);
d6385584f6c4 First shot at thread-safety.
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diff changeset
   352
} /* __PHYSFS_platformCreateMutex */
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diff changeset
   353
d6385584f6c4 First shot at thread-safety.
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diff changeset
   354
d6385584f6c4 First shot at thread-safety.
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diff changeset
   355
void __PHYSFS_platformDestroyMutex(void *mutex)
d6385584f6c4 First shot at thread-safety.
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diff changeset
   356
{
846
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   357
    pthread_mutex_t *m = (pthread_mutex_t *) mutex;
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   358
    pthread_mutex_destroy(m);
757
50e6457e78be Made unix mutexes recursive.
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diff changeset
   359
    allocator.Free(m);
145
d6385584f6c4 First shot at thread-safety.
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diff changeset
   360
} /* __PHYSFS_platformDestroyMutex */
d6385584f6c4 First shot at thread-safety.
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diff changeset
   361
d6385584f6c4 First shot at thread-safety.
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diff changeset
   362
d6385584f6c4 First shot at thread-safety.
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diff changeset
   363
int __PHYSFS_platformGrabMutex(void *mutex)
d6385584f6c4 First shot at thread-safety.
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parents: 137
diff changeset
   364
{
846
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   365
    pthread_mutex_t *m = (pthread_mutex_t *) mutex;
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   366
    if (pthread_mutex_lock(m) != 0)
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   367
        return(0);
757
50e6457e78be Made unix mutexes recursive.
Ryan C. Gordon <icculus@icculus.org>
parents: 691
diff changeset
   368
    return(1);
145
d6385584f6c4 First shot at thread-safety.
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parents: 137
diff changeset
   369
} /* __PHYSFS_platformGrabMutex */
d6385584f6c4 First shot at thread-safety.
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diff changeset
   370
d6385584f6c4 First shot at thread-safety.
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diff changeset
   371
d6385584f6c4 First shot at thread-safety.
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diff changeset
   372
void __PHYSFS_platformReleaseMutex(void *mutex)
d6385584f6c4 First shot at thread-safety.
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diff changeset
   373
{
846
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   374
    pthread_mutex_t *m = (pthread_mutex_t *) mutex;
df684fce470e Replaced manual management of recursive pthread mutexes with
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diff changeset
   375
    pthread_mutex_unlock(m);
145
d6385584f6c4 First shot at thread-safety.
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parents: 137
diff changeset
   376
} /* __PHYSFS_platformReleaseMutex */
d6385584f6c4 First shot at thread-safety.
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diff changeset
   377
390
6649d6caecf2 Stub code for platforms without functional pthreads.
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diff changeset
   378
#endif /* !PHYSFS_NO_PTHREADS_SUPPORT */
6649d6caecf2 Stub code for platforms without functional pthreads.
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parents: 381
diff changeset
   379
818
e36f23f49042 Now compiles everything whether we need it or not, removing whole files with
Ryan C. Gordon <icculus@icculus.org>
parents: 809
diff changeset
   380
#endif /* PHYSFS_PLATFORM_UNIX */
233
1b74a7df1ca6 Split some of the unix.c code out to posix.c for BeOS to use.
Ryan C. Gordon <icculus@icculus.org>
parents: 225
diff changeset
   381
17
7337737f5120 Moved from root source dir.
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parents:
diff changeset
   382
/* end of unix.c ... */
7337737f5120 Moved from root source dir.
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parents:
diff changeset
   383