+
+#if PLATFORM_LINUX
+#include <stdlib.h>
+#include <ctype.h>
+#include <unistd.h>
+static bool try_launch_browser(const char *browser, const char *url)
+{
+ // make sure string isn't empty...
+ while ( (*browser) && (isspace(*browser)) ) browser++;
+ if (*browser == '\0') return false;
+
+ bool seenurl = false;
+ char buf[4096]; // !!! FIXME: we aren't checking for overflow here!
+ char *dst = buf;
+ while (*browser)
+ {
+ char ch = *(browser++);
+ if (ch == '%')
+ {
+ ch = *(browser++);
+ if (ch == '%')
+ *(dst++) = '%';
+ else if (ch == 's') // "%s" == insert URL here.
+ {
+ *(dst++) = '\'';
+ strcpy(dst, url);
+ dst += strlen(url);
+ *(dst++) = '\'';
+ seenurl = true;
+ }
+ // (not %% or %s? Drop the char.)
+ }
+ else
+ {
+ *(dst++) = ch;
+ }
+ }
+
+ *dst = '\0';
+ if (!seenurl)
+ {
+ strcat(dst, " ");
+ strcat(dst, url);
+ }
+
+ #define MAX_BROWSER_ARGS 512
+ char *args[MAX_BROWSER_ARGS];
+ char *path = NULL;
+ memset(args, '\0', sizeof (args));
+ path = args[0] = strtok(buf, " ");
+ if (path == NULL)
+ return false;
+
+ size_t i = 0;
+ for (i = 1; i < MAX_BROWSER_ARGS; i++)
+ {
+ args[i] = strtok(NULL, " ");
+ if (args[i] == NULL)
+ break;
+ }
+
+ if (i == MAX_BROWSER_ARGS)
+ return false;
+ #undef MAX_BROWSER_ARGS
+
+ //printf("calling execvp(\"%s\"", path);
+ //for (i = 0; args[i]; i++)
+ // printf(", \"%s\"", args[i]);
+ //printf("); ...\n\n\n");
+
+ execvp(path, args);
+ return(false); // exec shouldn't return unless there's an error.
+}
+#endif
+
+
+static void launch_web_browser(const char *url)
+{
+#ifdef WIN32
+ ShellExecute(NULL, "open", url, NULL, NULL, SW_SHOWNORMAL);
+
+// lousy linux doesn't have a clean way to do this, but you can point people
+// to docs on the BROWSER variable:
+// http://www.catb.org/~esr/BROWSER/
+#elif PLATFORM_LINUX
+ if (strchr(url, '\'') != NULL) // Prevent simple shell injection.
+ return;
+
+ const char *envr = getenv("BROWSER");
+ if (envr == NULL) // not specified? We'll try a pseudo-sane list...
+ envr = "opera:mozilla:konqueror:firefox:netscape:xterm -e links:xterm -e lynx:";
+
+ char *ptr = (char *) alloca(strlen(envr) + 1);
+ if (ptr == NULL)
+ return;
+ strcpy(ptr, envr);
+ envr = ptr;
+
+ while ((ptr = strchr(envr, ':')) != NULL)
+ {
+ *ptr = '\0';
+ if (try_launch_browser(envr, url))
+ return;
+ envr = ptr + 1;
+ }
+
+ try_launch_browser(envr, url);
+#endif
+}
+
+
+#ifndef WIN32
+// (code lifted from physfs: http://icculus.org/physfs/ ... zlib license.)
+static char *findBinaryInPath(const char *bin, char *envr)
+{
+ size_t alloc_size = 0;
+ char *exe = NULL;
+ char *start = envr;
+ char *ptr;
+
+ 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);
+ return(NULL);
+ } /* if */
+
+ alloc_size = size;
+ exe = x;
+ } /* if */
+
+ /* build full binary path... */
+ strcpy(exe, start);
+ if ((exe[0] == '\0') || (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 */
+
+ start = ptr + 1; /* start points to beginning of next element. */
+ } while (ptr != NULL);
+
+ if (exe != NULL)
+ free(exe);
+
+ return(NULL); /* doesn't exist in path. */
+} /* findBinaryInPath */
+
+
+char *calcBaseDir(const char *argv0)
+{
+ /* If there isn't a path on argv0, then look through the $PATH for it. */
+ char *retval;
+ char *envr;
+
+ char *ptr = strrchr(argv0, '/');
+ if (strchr(argv0, '/'))
+ {
+ retval = strdup(argv0);
+ if (retval)
+ *(strrchr(retval, '/')) = '\0';
+ return(retval);
+ }
+
+ envr = getenv("PATH");
+ if (!envr) return NULL;
+ envr = strdup(envr);
+ if (!envr) return NULL;
+ retval = findBinaryInPath(argv0, envr);
+ free(envr);
+ return(retval);
+}
+
+static inline void chdirToAppPath(const char *argv0)