X-Git-Url: http://git.maemo.org/git/?p=browser-switch;a=blobdiff_plain;f=main.c;h=093b535918953ff89e6831e4ee114c47bd89d0af;hp=428d5bcb04b15d3d53d7f394f5eb3b0906d74124;hb=cf66e0a413468f9da4aaf05d61ec785bd7287ba2;hpb=42f0af690415fc59317203a187501c00c012c9d9 diff --git a/main.c b/main.c index 428d5bc..093b535 100644 --- a/main.c +++ b/main.c @@ -1,7 +1,7 @@ /* * main.c -- config file parsing and main loop for browser-switchboard * - * Copyright (C) 2009 Steven Luo + * Copyright (C) 2009-2010 Steven Luo * Derived from a Python implementation by Jason Simpson and Steven Luo * * This program is free software; you can redistribute it and/or @@ -22,21 +22,16 @@ #include #include -#include -#include #include #include #include -#include #include #include "browser-switchboard.h" #include "launcher.h" #include "dbus-server-bindings.h" - -#define DEFAULT_HOMEDIR "/home/user" -#define CONFIGFILE_LOC "/.config/browser-switchboard" -#define MAXLINE 1024 +#include "configfile.h" +#include "log.h" struct swb_context ctx; @@ -51,136 +46,94 @@ static void set_config_defaults(struct swb_context *ctx) { static void waitforzombies(int signalnum) { while (waitpid(-1, NULL, WNOHANG) > 0) - printf("Waited for a zombie\n"); + log_msg("Waited for a zombie\n"); } static void read_config(int signalnum) { - char *homedir, *configfile; - size_t len; - char buf[MAXLINE]; - char *key, *value; - char *default_browser = NULL; FILE *fp; - regex_t re_ignore, re_config1, re_config2; - regmatch_t substrs[3]; + int continuous_mode_seen = 0; + struct swb_config_line line; + char *default_browser = NULL, *logger_name = NULL; set_config_defaults(&ctx); - if (!(homedir = getenv("HOME"))) - homedir = DEFAULT_HOMEDIR; - len = strlen(homedir) + strlen(CONFIGFILE_LOC) + 1; - if (!(configfile = calloc(len, sizeof(char)))) - goto out_noopen; - strncpy(configfile, homedir, strlen(homedir)); - strncat(configfile, CONFIGFILE_LOC, strlen(CONFIGFILE_LOC)); - - if (!(fp = fopen(configfile, "r"))) + if (!(fp = open_config_file())) goto out_noopen; - /* compile regex matching blank lines or comments */ - if (regcomp(&re_ignore, "^[[:space:]]*(#|$)", REG_EXTENDED|REG_NOSUB)) - goto out_nore; - /* compile regex matching foo = "bar", with arbitrary whitespace at - beginning and end of line and surrounding the = */ - if (regcomp(&re_config1, - "^[[:space:]]*([^=[:space:]]+)[[:space:]]*=[[:space:]]*\"(.*)\"[[:space:]]*$", - REG_EXTENDED)) { - regfree(&re_ignore); - goto out_nore; - } - /* compile regex matching foo = bar, with arbitrary whitespace at - beginning of line and surrounding the = */ - if (regcomp(&re_config2, - "^[[:space:]]*([^=[:space:]]+)[[:space:]]*=[[:space:]]*(.*)$", - REG_EXTENDED|REG_NEWLINE)) { - regfree(&re_ignore); - regfree(&re_config1); - goto out_nore; - } - - /* Read in the config file one line at a time and parse it - XXX doesn't deal with lines longer than MAXLINE */ - while (fgets(buf, MAXLINE, fp)) { - printf("%s", buf); - /* skip blank lines and comments */ - if (!regexec(&re_ignore, buf, 0, NULL, 0)) - continue; - - /* Find the substrings corresponding to the key and value - If the line doesn't match our idea of a config file entry, - skip it */ - if (regexec(&re_config1, buf, 3, substrs, 0) && - regexec(&re_config2, buf, 3, substrs, 0)) - continue; - if (substrs[1].rm_so == -1 || substrs[2].rm_so == -1) - continue; - - /* copy the config value into a new string */ - len = substrs[2].rm_eo - substrs[2].rm_so; - if (!(value = calloc(len+1, sizeof(char)))) - goto out; - strncpy(value, buf+substrs[2].rm_so, len); - /* calloc() zeroes the memory, so string is automatically - null terminated */ - - /* make key point to a null-terminated string holding the - config key */ - key = buf + substrs[1].rm_so; - buf[substrs[1].rm_eo] = '\0'; - - if (!strcmp(key, "continuous_mode")) { - ctx.continuous_mode = atoi(value); - free(value); - } else if (!strcmp(key, "default_browser")) { - if (!default_browser) - default_browser = value; - } else if (!strcmp(key, "other_browser_cmd")) { - if (!ctx.other_browser_cmd) - ctx.other_browser_cmd = value; - } else { - /* Don't need this line's contents */ - free(value); + /* Parse the config file + TODO: should we handle errors differently than EOF? */ + if (!parse_config_file_begin()) + goto out; + while (!parse_config_file_line(fp, &line)) { + if (line.parsed) { + if (!strcmp(line.key, "continuous_mode")) { + if (!continuous_mode_seen) { + ctx.continuous_mode = atoi(line.value); + continuous_mode_seen = 1; + } + free(line.value); + } else if (!strcmp(line.key, "default_browser")) { + if (!default_browser) + default_browser = line.value; + } else if (!strcmp(line.key, "other_browser_cmd")) { + if (!ctx.other_browser_cmd) + ctx.other_browser_cmd = line.value; + } else if (!strcmp(line.key, "logging")) { + if (!logger_name) + logger_name = line.value; + } else { + /* Don't need this line's contents */ + free(line.value); + } } - value = NULL; + free(line.key); } - - printf("continuous_mode: %d\n", ctx.continuous_mode); - printf("default_browser: '%s'\n", default_browser?default_browser:"NULL"); - printf("other_browser_cmd: '%s'\n", ctx.other_browser_cmd?ctx.other_browser_cmd:"NULL"); + parse_config_file_end(); out: - regfree(&re_ignore); - regfree(&re_config1); - regfree(&re_config2); -out_nore: fclose(fp); out_noopen: + log_config(logger_name); update_default_browser(&ctx, default_browser); - free(configfile); + + log_msg("continuous_mode: %d\n", ctx.continuous_mode); + log_msg("default_browser: '%s'\n", + default_browser?default_browser:"NULL"); + log_msg("other_browser_cmd: '%s'\n", + ctx.other_browser_cmd?ctx.other_browser_cmd:"NULL"); + log_msg("logging: '%s'\n", + logger_name?logger_name:"NULL"); + + free(logger_name); free(default_browser); return; } int main() { - OssoBrowser *obj; + OssoBrowser *obj_osso_browser, *obj_osso_browser_req; GMainLoop *mainloop; GError *error = NULL; + int reqname_result; read_config(0); if (ctx.continuous_mode) { + /* Install signal handlers */ struct sigaction act; act.sa_flags = SA_RESTART; + sigemptyset(&(act.sa_mask)); + /* SIGCHLD -- clean up after zombies */ act.sa_handler = waitforzombies; if (sigaction(SIGCHLD, &act, NULL) == -1) { - printf("Installing signal handler failed\n"); + log_msg("Installing signal handler failed\n"); return 1; } + /* SIGHUP -- reread config file */ act.sa_handler = read_config; if (sigaction(SIGHUP, &act, NULL) == -1) { - printf("Installing signal handler failed\n"); + log_msg("Installing signal handler failed\n"); return 1; } } @@ -190,31 +143,56 @@ int main() { dbus_g_object_type_install_info(OSSO_BROWSER_TYPE, &dbus_glib_osso_browser_object_info); + /* Get a connection to the D-Bus session bus */ ctx.session_bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error); if (!ctx.session_bus) { - printf("Couldn't get a D-Bus bus connection\n"); + log_msg("Couldn't get a D-Bus bus connection\n"); return 1; } ctx.dbus_proxy = dbus_g_proxy_new_for_name(ctx.session_bus, "org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus"); if (!ctx.dbus_proxy) { - printf("Couldn't get an org.freedesktop.DBus proxy\n"); + log_msg("Couldn't get an org.freedesktop.DBus proxy\n"); + return 1; + } + + /* Get the org.maemo.garage.browser-switchboard name from D-Bus, as + a form of locking to ensure that not more than one + browser-switchboard process is active at any time. With + DBUS_NAME_FLAG_DO_NOT_QUEUE set and DBUS_NAME_FLAG_REPLACE_EXISTING + not set, getting the name succeeds if and only if no other + process owns the name. */ + if (!dbus_g_proxy_call(ctx.dbus_proxy, "RequestName", &error, + G_TYPE_STRING, "org.maemo.garage.browser-switchboard", + G_TYPE_UINT, DBUS_NAME_FLAG_DO_NOT_QUEUE, + G_TYPE_INVALID, + G_TYPE_UINT, &reqname_result, + G_TYPE_INVALID)) { + log_msg("Couldn't acquire browser-switchboard lock: %s\n", + error->message); + return 1; + } + if (reqname_result != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) { + log_msg("Another browser-switchboard already running\n"); return 1; } dbus_request_osso_browser_name(&ctx); - obj = g_object_new(OSSO_BROWSER_TYPE, NULL); + /* Register ourselves to handle the osso_browser D-Bus methods */ + obj_osso_browser = g_object_new(OSSO_BROWSER_TYPE, NULL); + obj_osso_browser_req = g_object_new(OSSO_BROWSER_TYPE, NULL); dbus_g_connection_register_g_object(ctx.session_bus, - "/com/nokia/osso_browser", G_OBJECT(obj)); + "/com/nokia/osso_browser", G_OBJECT(obj_osso_browser)); dbus_g_connection_register_g_object(ctx.session_bus, - "/com/nokia/osso_browser/request", G_OBJECT(obj)); + "/com/nokia/osso_browser/request", + G_OBJECT(obj_osso_browser_req)); mainloop = g_main_loop_new(NULL, FALSE); - printf("Starting main loop\n"); + log_msg("Starting main loop\n"); g_main_loop_run(mainloop); - printf("Main loop completed\n"); + log_msg("Main loop completed\n"); return 0; }