diff options
author | 2016-02-27 16:28:05 +0100 | |
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committer | 2016-02-27 16:53:49 +0100 | |
commit | cf6dc7d370407914020f3e623719f09c8668c692 (patch) | |
tree | 46b3416d091b4c09b50fba7ffcbd310aed032cc8 /3rdparty/SDL2/src/filesystem/unix | |
parent | 64135e73f973d9b95beb0c60b65feb34fbfec64a (diff) |
Placed SDL2 source since we need it on some platforms (nw)
Diffstat (limited to '3rdparty/SDL2/src/filesystem/unix')
-rw-r--r-- | 3rdparty/SDL2/src/filesystem/unix/SDL_sysfilesystem.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/filesystem/unix/SDL_sysfilesystem.c b/3rdparty/SDL2/src/filesystem/unix/SDL_sysfilesystem.c new file mode 100644 index 00000000000..fa034a45655 --- /dev/null +++ b/3rdparty/SDL2/src/filesystem/unix/SDL_sysfilesystem.c @@ -0,0 +1,210 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" + +#ifdef SDL_FILESYSTEM_UNIX + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ +/* System dependent filesystem routines */ + +#include <errno.h> +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <limits.h> + +#ifdef __FREEBSD__ +#include <sys/sysctl.h> +#endif + +#include "SDL_error.h" +#include "SDL_stdinc.h" +#include "SDL_filesystem.h" + +static char * +readSymLink(const char *path) +{ + char *retval = NULL; + ssize_t len = 64; + ssize_t rc = -1; + + while (1) + { + char *ptr = (char *) SDL_realloc(retval, (size_t) len); + if (ptr == NULL) { + SDL_OutOfMemory(); + break; + } + + retval = ptr; + + rc = readlink(path, retval, len); + if (rc == -1) { + break; /* not a symlink, i/o error, etc. */ + } else if (rc < len) { + retval[rc] = '\0'; /* readlink doesn't null-terminate. */ + return retval; /* we're good to go. */ + } + + len *= 2; /* grow buffer, try again. */ + } + + SDL_free(retval); + return NULL; +} + + +char * +SDL_GetBasePath(void) +{ + char *retval = NULL; + +#if defined(__FREEBSD__) + char fullpath[PATH_MAX]; + size_t buflen = sizeof (fullpath); + const int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 }; + if (sysctl(mib, SDL_arraysize(mib), fullpath, &buflen, NULL, 0) != -1) { + retval = SDL_strdup(fullpath); + if (!retval) { + SDL_OutOfMemory(); + return NULL; + } + } +#elif defined(__SOLARIS__) + const char *path = getexecname(); + if ((path != NULL) && (path[0] == '/')) { /* must be absolute path... */ + retval = SDL_strdup(path); + if (!retval) { + SDL_OutOfMemory(); + return NULL; + } + } +#endif + + /* is a Linux-style /proc filesystem available? */ + if (!retval && (access("/proc", F_OK) == 0)) { +#if defined(__FREEBSD__) + retval = readSymLink("/proc/curproc/file"); +#elif defined(__NETBSD__) + retval = readSymLink("/proc/curproc/exe"); +#else + retval = readSymLink("/proc/self/exe"); /* linux. */ +#endif + if (retval == NULL) { + /* older kernels don't have /proc/self ... try PID version... */ + char path[64]; + const int rc = (int) SDL_snprintf(path, sizeof(path), + "/proc/%llu/exe", + (unsigned long long) getpid()); + if ( (rc > 0) && (rc < sizeof(path)) ) { + retval = readSymLink(path); + } + } + } + + /* If we had access to argv[0] here, we could check it for a path, + or troll through $PATH looking for it, too. */ + + if (retval != NULL) { /* chop off filename. */ + char *ptr = SDL_strrchr(retval, '/'); + if (ptr != NULL) { + *(ptr+1) = '\0'; + } else { /* shouldn't happen, but just in case... */ + SDL_free(retval); + retval = NULL; + } + } + + if (retval != NULL) { + /* try to shrink buffer... */ + char *ptr = (char *) SDL_realloc(retval, strlen(retval) + 1); + if (ptr != NULL) + retval = ptr; /* oh well if it failed. */ + } + + return retval; +} + +char * +SDL_GetPrefPath(const char *org, const char *app) +{ + /* + * We use XDG's base directory spec, even if you're not on Linux. + * This isn't strictly correct, but the results are relatively sane + * in any case. + * + * http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html + */ + const char *envr = SDL_getenv("XDG_DATA_HOME"); + const char *append; + char *retval = NULL; + char *ptr = NULL; + size_t len = 0; + + if (!envr) { + /* You end up with "$HOME/.local/share/Game Name 2" */ + envr = SDL_getenv("HOME"); + if (!envr) { + /* we could take heroic measures with /etc/passwd, but oh well. */ + SDL_SetError("neither XDG_DATA_HOME nor HOME environment is set"); + return NULL; + } + append = "/.local/share/"; + } else { + append = "/"; + } + + len = SDL_strlen(envr); + if (envr[len - 1] == '/') + append += 1; + + len += SDL_strlen(append) + SDL_strlen(org) + SDL_strlen(app) + 3; + retval = (char *) SDL_malloc(len); + if (!retval) { + SDL_OutOfMemory(); + return NULL; + } + + SDL_snprintf(retval, len, "%s%s%s/%s/", envr, append, org, app); + + for (ptr = retval+1; *ptr; ptr++) { + if (*ptr == '/') { + *ptr = '\0'; + if (mkdir(retval, 0700) != 0 && errno != EEXIST) + goto error; + *ptr = '/'; + } + } + if (mkdir(retval, 0700) != 0 && errno != EEXIST) { +error: + SDL_SetError("Couldn't create directory '%s': '%s'", retval, strerror(errno)); + SDL_free(retval); + return NULL; + } + + return retval; +} + +#endif /* SDL_FILESYSTEM_UNIX */ + +/* vi: set ts=4 sw=4 expandtab: */ |