plugins/menu/fifo_menu.c (raw)
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#include <glib.h> #include <sys/types.h> #include <sys/stat.h> #include <errno.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #include <stdio.h> #include "kernel/menu.h" #include "kernel/event.h" static char *PLUGIN_NAME = "fifo_menu"; typedef struct Fifo_Menu_Data { char *fifo; char *buf; /* buffer to hold partially read menu */ unsigned long buflen; /* how many bytes are in the buffer */ int fd; /* file descriptor to read menu from */ gboolean use_pid; event_fd_handler *handler; } Fifo_Menu_Data; #define FIFO_MENU(m) ((ObMenu *)m) #define FIFO_MENU_DATA(m) ((Fifo_Menu_Data *)((ObMenu *)m)->plugin_data) void fifo_menu_clean_up(ObMenu *m) { if (FIFO_MENU_DATA(m)->buf != NULL) { g_free(FIFO_MENU_DATA(m)->buf); FIFO_MENU_DATA(m)->buf = NULL; FIFO_MENU_DATA(m)->buflen = 0; } if (FIFO_MENU_DATA(m)->fd != -1) { close(FIFO_MENU_DATA(m)->fd); FIFO_MENU_DATA(m)->fd = -1; } } void plugin_setup_config() { } void plugin_startup() { } void plugin_shutdown() { } void fifo_menu_handler(int fd, void *d) { ObMenu *menu = d; char *tmpbuf = NULL; unsigned long num_read; #ifdef DEBUG /* because gdb is dumb */ #if 0 Fifo_Menu_Data *d = FIFO_MENU_DATA(menu); #endif #endif /* if the menu is shown this will go into busy loop :( fix me*/ if (!menu->shown) { unsigned long num_realloc; /* if we have less than a quarter BUFSIZ left, allocate more */ num_realloc = (BUFSIZ - (FIFO_MENU_DATA(menu)->buflen % BUFSIZ) < BUFSIZ >> 2) ? 0 : BUFSIZ; tmpbuf = g_try_realloc(FIFO_MENU_DATA(menu)->buf, FIFO_MENU_DATA(menu)->buflen + num_realloc); if (tmpbuf == NULL) { g_warning("Unable to allocate memory for read()"); return; } FIFO_MENU_DATA(menu)->buf = tmpbuf; num_read = read(fd, FIFO_MENU_DATA(menu)->buf + FIFO_MENU_DATA(menu)->buflen, num_realloc); if (num_read == 0) { /* eof */ xmlDocPtr doc; xmlNodePtr node; menu->invalid = TRUE; menu_clear(menu); FIFO_MENU_DATA(menu)->buf[FIFO_MENU_DATA(menu)->buflen] = '\0'; doc = xmlParseMemory(FIFO_MENU_DATA(menu)->buf, FIFO_MENU_DATA(menu)->buflen); node = xmlDocGetRootElement(doc); if (node && !xmlStrcasecmp(node->name, (const xmlChar*) "fifo_menu")) { if ((node = parse_find_node("item", node->xmlChildrenNode))) parse_menu_full(doc, node, menu, FALSE); } fifo_menu_clean_up(menu); event_remove_fd(FIFO_MENU_DATA(menu)->handler->fd); if ((FIFO_MENU_DATA(menu)->fd = open(FIFO_MENU_DATA(menu)->fifo, O_NONBLOCK | O_RDONLY)) == -1) { g_warning("Can't reopen FIFO"); fifo_menu_clean_up(menu); return; } FIFO_MENU_DATA(menu)->handler->fd = FIFO_MENU_DATA(menu)->fd; event_add_fd_handler(FIFO_MENU_DATA(menu)->handler); } else if (num_read > 0) { FIFO_MENU_DATA(menu)->buflen += num_read; FIFO_MENU_DATA(menu)->buf[FIFO_MENU_DATA(menu)->buflen] = '\0'; } } } void plugin_destroy (ObMenu *m) { fifo_menu_clean_up(m); if (FIFO_MENU_DATA(m)->handler != NULL) { g_free(FIFO_MENU_DATA(m)->handler); FIFO_MENU_DATA(m)->handler = NULL; } if (FIFO_MENU_DATA(m)->fifo != NULL) { g_free(FIFO_MENU_DATA(m)->fifo); FIFO_MENU_DATA(m)->fifo = NULL; } if (FIFO_MENU_DATA(m)->buf != NULL) { g_free(FIFO_MENU_DATA(m)->buf); FIFO_MENU_DATA(m)->buf = NULL; } g_free(m->plugin_data); menu_free(m->name); } void *plugin_create(PluginMenuCreateData *data) { char *fifo; char *dir; event_fd_handler *h; Fifo_Menu_Data *d; ObMenu *m; char *label = NULL, *id = NULL; char *attr_pid = NULL; d = g_new(Fifo_Menu_Data, 1); parse_attr_string("id", data->node, &id); parse_attr_string("label", data->node, &label); if (parse_attr_string("pid", data->node, &attr_pid) && g_strcasecmp(attr_pid, "true") == 0) { d->use_pid = TRUE; } else d->use_pid = FALSE; m = menu_new( (label != NULL ? label : ""), (id != NULL ? id : PLUGIN_NAME), data->parent); if (data->parent) menu_add_entry(data->parent, menu_entry_new_submenu( (label != NULL ? label : ""), m)); g_free(label); g_free(id); d->fd = -1; d->buf = NULL; d->buflen = 0; d->handler = NULL; m->plugin = PLUGIN_NAME; d->fd = -1; m->plugin_data = (void *)d; dir = g_build_filename(g_get_home_dir(), ".openbox", PLUGIN_NAME, NULL); if (mkdir(dir, S_IRWXU | S_IRWXG | S_IRWXO) == -1 && errno != EEXIST) { /* technically, if ~/.openbox/fifo_menu exists and isn't a directory this will fail, but we don't care because mkfifo will fail and warn anyway */ g_warning("Can't create %s: %s", dir, strerror(errno)); g_free(dir); plugin_destroy(m); return NULL; } if (d->use_pid) { char *pid = g_strdup_printf("%s.%d", m->name, getpid()); fifo = g_build_filename(g_get_home_dir(), ".openbox", PLUGIN_NAME, pid, NULL); g_free(pid); } else { fifo = g_build_filename(g_get_home_dir(), ".openbox", PLUGIN_NAME, m->name, NULL); } if (mkfifo(fifo, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | /* let umask do its thing */ S_IROTH | S_IWOTH) == -1 && errno != EEXIST) { g_warning("Can't create FIFO %s: %s", fifo, strerror(errno)); g_free(fifo); g_free(d); menu_free(m->name); return NULL; } /* open in non-blocking mode so we don't wait for a process to open FIFO for writing */ if ((d->fd = open(fifo, O_NONBLOCK | O_RDONLY)) == -1) { g_warning("Can't open FIFO %s: %s", fifo, strerror(errno)); g_free(fifo); g_free(d); menu_free(m->name); return NULL; } d->fifo = fifo; h = g_new(event_fd_handler, 1); if (h == NULL) { g_warning("Out of memory"); close(d->fd); g_free(fifo); g_free(d); menu_free(m->name); return NULL; } h->fd = d->fd; h->data = m; h->handler = fifo_menu_handler; d->handler = h; event_add_fd_handler(h); g_free(dir); return (void *)m; } |