--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/platform_posix.c Fri Feb 22 05:43:56 2013 +0100
@@ -0,0 +1,479 @@
+/*
+ * Posix-esque support routines for PhysicsFS.
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ * This file written by Ryan C. Gordon.
+ */
+
+/* !!! FIXME: check for EINTR? */
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_platforms.h"
+
+#ifdef PHYSFS_PLATFORM_POSIX
+
+#include <unistd.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#if ((!defined PHYSFS_NO_THREAD_SUPPORT) && (!defined PHYSFS_PLATFORM_BEOS))
+#include <pthread.h>
+#endif
+
+#include "physfs_internal.h"
+
+
+static PHYSFS_ErrorCode errcodeFromErrnoError(const int err)
+{
+ switch (err)
+ {
+ case 0: return PHYSFS_ERR_OK;
+ case EACCES: return PHYSFS_ERR_PERMISSION;
+ case EPERM: return PHYSFS_ERR_PERMISSION;
+ case EDQUOT: return PHYSFS_ERR_NO_SPACE;
+ case EIO: return PHYSFS_ERR_IO;
+ case ELOOP: return PHYSFS_ERR_SYMLINK_LOOP;
+ case EMLINK: return PHYSFS_ERR_NO_SPACE;
+ case ENAMETOOLONG: return PHYSFS_ERR_BAD_FILENAME;
+ case ENOENT: return PHYSFS_ERR_NO_SUCH_PATH;
+ case ENOSPC: return PHYSFS_ERR_NO_SPACE;
+ case ENOTDIR: return PHYSFS_ERR_NO_SUCH_PATH;
+ case EISDIR: return PHYSFS_ERR_NOT_A_FILE;
+ case EROFS: return PHYSFS_ERR_READ_ONLY;
+ case ETXTBSY: return PHYSFS_ERR_BUSY;
+ case EBUSY: return PHYSFS_ERR_BUSY;
+ case ENOMEM: return PHYSFS_ERR_OUT_OF_MEMORY;
+ case ENOTEMPTY: return PHYSFS_ERR_DIR_NOT_EMPTY;
+ default: return PHYSFS_ERR_OS_ERROR;
+ } /* switch */
+} /* errcodeFromErrnoError */
+
+
+static inline PHYSFS_ErrorCode errcodeFromErrno(void)
+{
+ return errcodeFromErrnoError(errno);
+} /* errcodeFromErrno */
+
+
+static char *getUserDirByUID(void)
+{
+ uid_t uid = getuid();
+ struct passwd *pw;
+ char *retval = NULL;
+
+ pw = getpwuid(uid);
+ if ((pw != NULL) && (pw->pw_dir != NULL) && (*pw->pw_dir != '\0'))
+ {
+ const size_t dlen = strlen(pw->pw_dir);
+ const size_t add_dirsep = (pw->pw_dir[dlen-1] != '/') ? 1 : 0;
+ retval = (char *) allocator.Malloc(dlen + 1 + add_dirsep);
+ if (retval != NULL)
+ {
+ strcpy(retval, pw->pw_dir);
+ if (add_dirsep)
+ {
+ retval[dlen] = '/';
+ retval[dlen+1] = '\0';
+ } /* if */
+ } /* if */
+ } /* if */
+
+ return retval;
+} /* getUserDirByUID */
+
+
+char *__PHYSFS_platformCalcUserDir(void)
+{
+ char *retval = NULL;
+ char *envr = getenv("HOME");
+
+ /* if the environment variable was set, make sure it's really a dir. */
+ if (envr != NULL)
+ {
+ struct stat statbuf;
+ if ((stat(envr, &statbuf) != -1) && (S_ISDIR(statbuf.st_mode)))
+ {
+ const size_t envrlen = strlen(envr);
+ const size_t add_dirsep = (envr[envrlen-1] != '/') ? 1 : 0;
+ retval = allocator.Malloc(envrlen + 1 + add_dirsep);
+ if (retval)
+ {
+ strcpy(retval, envr);
+ if (add_dirsep)
+ {
+ retval[envrlen] = '/';
+ retval[envrlen+1] = '\0';
+ } /* if */
+ } /* if */
+ } /* if */
+ } /* if */
+
+ if (retval == NULL)
+ retval = getUserDirByUID();
+
+ return retval;
+} /* __PHYSFS_platformCalcUserDir */
+
+
+void __PHYSFS_platformEnumerateFiles(const char *dirname,
+ int omitSymLinks,
+ PHYSFS_EnumFilesCallback callback,
+ const char *origdir,
+ void *callbackdata)
+{
+ DIR *dir;
+ struct dirent *ent;
+ int bufsize = 0;
+ char *buf = NULL;
+ int dlen = 0;
+
+ if (omitSymLinks) /* !!! FIXME: this malloc sucks. */
+ {
+ dlen = strlen(dirname);
+ bufsize = dlen + 256;
+ buf = (char *) allocator.Malloc(bufsize);
+ if (buf == NULL)
+ return;
+ strcpy(buf, dirname);
+ if (buf[dlen - 1] != '/')
+ {
+ buf[dlen++] = '/';
+ buf[dlen] = '\0';
+ } /* if */
+ } /* if */
+
+ errno = 0;
+ dir = opendir(dirname);
+ if (dir == NULL)
+ {
+ allocator.Free(buf);
+ return;
+ } /* if */
+
+ while ((ent = readdir(dir)) != NULL)
+ {
+ if (strcmp(ent->d_name, ".") == 0)
+ continue;
+
+ if (strcmp(ent->d_name, "..") == 0)
+ continue;
+
+ if (omitSymLinks)
+ {
+ PHYSFS_Stat statbuf;
+ int exists = 0;
+ char *p;
+ int len = strlen(ent->d_name) + dlen + 1;
+ if (len > bufsize)
+ {
+ p = (char *) allocator.Realloc(buf, len);
+ if (p == NULL)
+ continue;
+ buf = p;
+ bufsize = len;
+ } /* if */
+
+ strcpy(buf + dlen, ent->d_name);
+
+ if (!__PHYSFS_platformStat(buf, &exists, &statbuf))
+ continue;
+ else if (!exists)
+ continue; /* probably can't happen, but just in case. */
+ else if (statbuf.filetype == PHYSFS_FILETYPE_SYMLINK)
+ continue;
+ } /* if */
+
+ callback(callbackdata, origdir, ent->d_name);
+ } /* while */
+
+ allocator.Free(buf);
+ closedir(dir);
+} /* __PHYSFS_platformEnumerateFiles */
+
+
+int __PHYSFS_platformMkDir(const char *path)
+{
+ const int rc = mkdir(path, S_IRWXU);
+ BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), 0);
+ return 1;
+} /* __PHYSFS_platformMkDir */
+
+
+static void *doOpen(const char *filename, int mode)
+{
+ const int appending = (mode & O_APPEND);
+ int fd;
+ int *retval;
+ errno = 0;
+
+ /* O_APPEND doesn't actually behave as we'd like. */
+ mode &= ~O_APPEND;
+
+ fd = open(filename, mode, S_IRUSR | S_IWUSR);
+ BAIL_IF_MACRO(fd < 0, errcodeFromErrno(), NULL);
+
+ if (appending)
+ {
+ if (lseek(fd, 0, SEEK_END) < 0)
+ {
+ const int err = errno;
+ close(fd);
+ BAIL_MACRO(errcodeFromErrnoError(err), NULL);
+ } /* if */
+ } /* if */
+
+ retval = (int *) allocator.Malloc(sizeof (int));
+ if (!retval)
+ {
+ close(fd);
+ BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+ } /* if */
+
+ *retval = fd;
+ return ((void *) retval);
+} /* doOpen */
+
+
+void *__PHYSFS_platformOpenRead(const char *filename)
+{
+ return doOpen(filename, O_RDONLY);
+} /* __PHYSFS_platformOpenRead */
+
+
+void *__PHYSFS_platformOpenWrite(const char *filename)
+{
+ return doOpen(filename, O_WRONLY | O_CREAT | O_TRUNC);
+} /* __PHYSFS_platformOpenWrite */
+
+
+void *__PHYSFS_platformOpenAppend(const char *filename)
+{
+ return doOpen(filename, O_WRONLY | O_CREAT | O_APPEND);
+} /* __PHYSFS_platformOpenAppend */
+
+
+PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
+ PHYSFS_uint64 len)
+{
+ const int fd = *((int *) opaque);
+ ssize_t rc = 0;
+
+ if (!__PHYSFS_ui64FitsAddressSpace(len))
+ BAIL_MACRO(PHYSFS_ERR_INVALID_ARGUMENT, -1);
+
+ rc = read(fd, buffer, (size_t) len);
+ BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), -1);
+ assert(rc >= 0);
+ assert(rc <= len);
+ return (PHYSFS_sint64) rc;
+} /* __PHYSFS_platformRead */
+
+
+PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
+ PHYSFS_uint64 len)
+{
+ const int fd = *((int *) opaque);
+ ssize_t rc = 0;
+
+ if (!__PHYSFS_ui64FitsAddressSpace(len))
+ BAIL_MACRO(PHYSFS_ERR_INVALID_ARGUMENT, -1);
+
+ rc = write(fd, (void *) buffer, (size_t) len);
+ BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), rc);
+ assert(rc >= 0);
+ assert(rc <= len);
+ return (PHYSFS_sint64) rc;
+} /* __PHYSFS_platformWrite */
+
+
+int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
+{
+ const int fd = *((int *) opaque);
+ const int rc = lseek(fd, (off_t) pos, SEEK_SET);
+ BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), 0);
+ return 1;
+} /* __PHYSFS_platformSeek */
+
+
+PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
+{
+ const int fd = *((int *) opaque);
+ PHYSFS_sint64 retval;
+ retval = (PHYSFS_sint64) lseek(fd, 0, SEEK_CUR);
+ BAIL_IF_MACRO(retval == -1, errcodeFromErrno(), -1);
+ return retval;
+} /* __PHYSFS_platformTell */
+
+
+PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
+{
+ const int fd = *((int *) opaque);
+ struct stat statbuf;
+ BAIL_IF_MACRO(fstat(fd, &statbuf) == -1, errcodeFromErrno(), -1);
+ return ((PHYSFS_sint64) statbuf.st_size);
+} /* __PHYSFS_platformFileLength */
+
+
+int __PHYSFS_platformFlush(void *opaque)
+{
+ const int fd = *((int *) opaque);
+ BAIL_IF_MACRO(fsync(fd) == -1, errcodeFromErrno(), 0);
+ return 1;
+} /* __PHYSFS_platformFlush */
+
+
+void __PHYSFS_platformClose(void *opaque)
+{
+ const int fd = *((int *) opaque);
+ (void) close(fd); /* we don't check this. You should have used flush! */
+ allocator.Free(opaque);
+} /* __PHYSFS_platformClose */
+
+
+int __PHYSFS_platformDelete(const char *path)
+{
+ BAIL_IF_MACRO(remove(path) == -1, errcodeFromErrno(), 0);
+ return 1;
+} /* __PHYSFS_platformDelete */
+
+
+int __PHYSFS_platformStat(const char *filename, int *exists, PHYSFS_Stat *st)
+{
+ struct stat statbuf;
+
+ if (lstat(filename, &statbuf) == -1)
+ {
+ *exists = (errno != ENOENT);
+ BAIL_MACRO(errcodeFromErrno(), 0);
+ } /* if */
+
+ *exists = 1;
+
+ if (S_ISREG(statbuf.st_mode))
+ {
+ st->filetype = PHYSFS_FILETYPE_REGULAR;
+ st->filesize = statbuf.st_size;
+ } /* if */
+
+ else if(S_ISDIR(statbuf.st_mode))
+ {
+ st->filetype = PHYSFS_FILETYPE_DIRECTORY;
+ st->filesize = 0;
+ } /* else if */
+
+ else
+ {
+ st->filetype = PHYSFS_FILETYPE_OTHER;
+ st->filesize = statbuf.st_size;
+ } /* else */
+
+ st->modtime = statbuf.st_mtime;
+ st->createtime = statbuf.st_ctime;
+ st->accesstime = statbuf.st_atime;
+
+ /* !!! FIXME: maybe we should just report full permissions? */
+ st->readonly = access(filename, W_OK);
+ return 1;
+} /* __PHYSFS_platformStat */
+
+
+#ifndef PHYSFS_PLATFORM_BEOS /* BeOS has its own code in platform_beos.cpp */
+#if (defined PHYSFS_NO_THREAD_SUPPORT)
+
+void *__PHYSFS_platformGetThreadID(void) { return ((void *) 0x0001); }
+void *__PHYSFS_platformCreateMutex(void) { return ((void *) 0x0001); }
+void __PHYSFS_platformDestroyMutex(void *mutex) {}
+int __PHYSFS_platformGrabMutex(void *mutex) { return 1; }
+void __PHYSFS_platformReleaseMutex(void *mutex) {}
+
+#else
+
+typedef struct
+{
+ pthread_mutex_t mutex;
+ pthread_t owner;
+ PHYSFS_uint32 count;
+} PthreadMutex;
+
+
+void *__PHYSFS_platformGetThreadID(void)
+{
+ return ( (void *) ((size_t) pthread_self()) );
+} /* __PHYSFS_platformGetThreadID */
+
+
+void *__PHYSFS_platformCreateMutex(void)
+{
+ int rc;
+ PthreadMutex *m = (PthreadMutex *) allocator.Malloc(sizeof (PthreadMutex));
+ BAIL_IF_MACRO(!m, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+ rc = pthread_mutex_init(&m->mutex, NULL);
+ if (rc != 0)
+ {
+ allocator.Free(m);
+ BAIL_MACRO(PHYSFS_ERR_OS_ERROR, NULL);
+ } /* if */
+
+ m->count = 0;
+ m->owner = (pthread_t) 0xDEADBEEF;
+ return ((void *) m);
+} /* __PHYSFS_platformCreateMutex */
+
+
+void __PHYSFS_platformDestroyMutex(void *mutex)
+{
+ PthreadMutex *m = (PthreadMutex *) mutex;
+
+ /* Destroying a locked mutex is a bug, but we'll try to be helpful. */
+ if ((m->owner == pthread_self()) && (m->count > 0))
+ pthread_mutex_unlock(&m->mutex);
+
+ pthread_mutex_destroy(&m->mutex);
+ allocator.Free(m);
+} /* __PHYSFS_platformDestroyMutex */
+
+
+int __PHYSFS_platformGrabMutex(void *mutex)
+{
+ PthreadMutex *m = (PthreadMutex *) mutex;
+ pthread_t tid = pthread_self();
+ if (m->owner != tid)
+ {
+ if (pthread_mutex_lock(&m->mutex) != 0)
+ return 0;
+ m->owner = tid;
+ } /* if */
+
+ m->count++;
+ return 1;
+} /* __PHYSFS_platformGrabMutex */
+
+
+void __PHYSFS_platformReleaseMutex(void *mutex)
+{
+ PthreadMutex *m = (PthreadMutex *) mutex;
+ assert(m->owner == pthread_self()); /* catch programming errors. */
+ assert(m->count > 0); /* catch programming errors. */
+ if (m->owner == pthread_self())
+ {
+ if (--m->count == 0)
+ {
+ m->owner = (pthread_t) 0xDEADBEEF;
+ pthread_mutex_unlock(&m->mutex);
+ } /* if */
+ } /* if */
+} /* __PHYSFS_platformReleaseMutex */
+
+#endif /* !PHYSFS_NO_THREAD_SUPPORT */
+#endif /* !PHYSFS_PLATFORM_BEOS */
+
+#endif /* PHYSFS_PLATFORM_POSIX */
+
+/* end of posix.c ... */
+