#include <glib.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <sys/stat.h>
#include "kernel/menu.h"
#include "kernel/timer.h"
#include "timed_menu.h"
#include "kernel/action.h"
+#include "kernel/event.h"
#define TIMED_MENU(m) ((Menu *)m)
#define TIMED_MENU_DATA(m) ((Timed_Menu_Data *)((Menu *)m)->plugin_data)
static char *PLUGIN_NAME = "timed_menu";
typedef enum {
- TIMED_MENU_PIPE
+ TIMED_MENU_PIPE, /* read entries from a child process' output */
+ TIMED_MENU_STAT /* reread entries from file when timestamp changes */
} Timed_Menu_Type;
-/* we can use various GIO channels to support reading menus (can we add them to
- the event loop? )
- stat() based update
- exec() based read
-*/
typedef struct {
Timed_Menu_Type type;
- Timer *timer; /* timer code handles free */
+ ObTimer *timer;
char *command; /* for the PIPE */
+ 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 */
+ pid_t pid; /* pid of child process in PIPE */
+ time_t mtime; /* time of last modification */
} Timed_Menu_Data;
{ }
void plugin_shutdown() { }
-void timed_menu_timeout_handler(void *data)
+void timed_menu_clean_up(Menu *m) {
+ if (TIMED_MENU_DATA(m)->buf != NULL) {
+ fprintf(stderr, "%s", TIMED_MENU_DATA(m)->buf);
+ g_free(TIMED_MENU_DATA(m)->buf);
+ TIMED_MENU_DATA(m)->buf = NULL;
+ }
+
+ TIMED_MENU_DATA(m)->buflen = 0;
+
+ if (TIMED_MENU_DATA(m)->fd != -1) {
+ event_remove_fd(TIMED_MENU_DATA(m)->fd);
+ close(TIMED_MENU_DATA(m)->fd);
+ TIMED_MENU_DATA(m)->fd = -1;
+ }
+
+ if (TIMED_MENU_DATA(m)->pid != -1) {
+ waitpid(TIMED_MENU_DATA(m)->pid, NULL, 0);
+ TIMED_MENU_DATA(m)->pid = -1;
+ }
+
+ TIMED_MENU_DATA(m)->mtime = 0;
+}
+
+void timed_menu_read_pipe(int fd, void *d)
{
- Action *a;
- ((Menu *)data)->invalid = TRUE;
+ Menu *menu = d;
+ char *tmpbuf = NULL;
+ unsigned long num_read;
+#ifdef DEBUG
+ /* because gdb is dumb */
+#if 0
+ Timed_Menu_Data *d = TIMED_MENU_DATA(menu);
+#endif
+#endif
+
+ unsigned long num_realloc;
+ /* if we have less than a quarter BUFSIZ left, allocate more */
+ num_realloc = (BUFSIZ - (TIMED_MENU_DATA(menu)->buflen % BUFSIZ) <
+ BUFSIZ >> 2) ?
+ 0 : BUFSIZ;
+
+ tmpbuf = g_try_realloc(TIMED_MENU_DATA(menu)->buf,
+ TIMED_MENU_DATA(menu)->buflen + num_realloc);
+
+ if (tmpbuf == NULL) {
+ g_warning("Unable to allocate memory for read()");
+ return;
+ }
+
+ TIMED_MENU_DATA(menu)->buf = tmpbuf;
+
+ num_read = read(fd,
+ TIMED_MENU_DATA(menu)->buf + TIMED_MENU_DATA(menu)->buflen,
+ num_realloc);
+ if (num_read == 0) {
+ unsigned long count = 0;
+ char *found = NULL;
+ menu->invalid = TRUE;
+ menu_clear(menu);
+
+ /* TEMP: list them */
+ while (NULL !=
+ (found = strchr(&TIMED_MENU_DATA(menu)->buf[count], '\n'))) {
+ TIMED_MENU_DATA(menu)->buf
+ [found - TIMED_MENU_DATA(menu)->buf] = '\0';
+ menu_add_entry(menu,
+ menu_entry_new_separator
+ (&TIMED_MENU_DATA(menu)->buf[count]));
+ count = found - TIMED_MENU_DATA(menu)->buf + 1;
+ }
- if (!TIMED_MENU(data)->shown) {
+ TIMED_MENU_DATA(menu)->buf[TIMED_MENU_DATA(menu)->buflen] = '\0';
+ timed_menu_clean_up(menu);
+ } else if (num_read > 0) {
+ TIMED_MENU_DATA(menu)->buflen += num_read;
+ TIMED_MENU_DATA(menu)->buf[TIMED_MENU_DATA(menu)->buflen] = '\0';
+ } else { /* num_read < 1 */
+ g_warning("Error on read %s", strerror(errno));
+ timed_menu_clean_up(menu);
+ }
+}
+
+void timed_menu_timeout_handler(void *d)
+{
+ Menu *data = d;
+ if (!data->shown && TIMED_MENU_DATA(data)->fd == -1) {
switch (TIMED_MENU_DATA(data)->type) {
- case (TIMED_MENU_PIPE):
- {
+ case (TIMED_MENU_PIPE): {
/* if the menu is not shown, run a process and use its output
as menu */
- char *args[] = {"/bin/sh", "-c", TIMED_MENU_DATA(data)->command,
- NULL};
- GIOChannel *io;
- char *line;
- gint child, c_stdout, line_len, terminator_pos;
- GIOStatus status;
- /* this blocks for now, until the event stuff can handle it */
- if (!g_spawn_async_with_pipes(NULL,
+
+ /* I hate you glib in all your hideous forms */
+ char *args[4];
+ int child_stdout;
+ int child_pid;
+ args[0] = "/bin/sh";
+ args[1] = "-c";
+ args[2] = TIMED_MENU_DATA(data)->command;
+ args[3] = NULL;
+ if (g_spawn_async_with_pipes(
+ NULL,
args,
NULL,
- G_SPAWN_DO_NOT_REAP_CHILD,
- NULL, NULL,
- &child, NULL, &c_stdout, NULL,
+ G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
+ NULL,
+ NULL,
+ &child_pid,
+ NULL,
+ &child_stdout,
+ NULL,
NULL)) {
- g_warning("%s: Unable to run timed_menu program",
- __FUNCTION__);
- break;
+ event_fd_handler *h = g_new(event_fd_handler, 1);
+ TIMED_MENU_DATA(data)->fd = h->fd = child_stdout;
+ TIMED_MENU_DATA(data)->pid = child_pid;
+ h->handler = timed_menu_read_pipe;
+ h->data = data;
+ event_add_fd_handler(h);
+ } else {
+ g_warning("unable to spawn child");
}
-
- io = g_io_channel_unix_new(c_stdout);
- if (io == NULL) {
- g_error("%s: Unable to get IO channel", __FUNCTION__);
+ break;
+ }
+
+ case (TIMED_MENU_STAT): {
+ struct stat stat_buf;
+
+ if (stat(TIMED_MENU_DATA(data)->command, &stat_buf) == -1) {
+ g_warning("Unable to stat %s: %s",
+ TIMED_MENU_DATA(data)->command,
+ strerror(errno));
break;
}
- menu_clear(TIMED_MENU(data));
-
- while ( G_IO_STATUS_NORMAL == (status =
- g_io_channel_read_line
- (io, &line, &line_len, &terminator_pos, NULL))
- ) {
- /* the \n looks ugly */
- line[terminator_pos] = '\0';
- menu_add_entry(TIMED_MENU(data),
- menu_entry_new_separator(line));
- g_message("%s", line);
- g_free(line);
+ if (stat_buf.st_mtime > TIMED_MENU_DATA(data)->mtime) {
+ g_warning("file changed");
+ TIMED_MENU_DATA(data)->mtime = stat_buf.st_mtime;
+ /* TODO: parse */
}
- break;
}
}
}
m->plugin = PLUGIN_NAME;
- d->type = TIMED_MENU_PIPE;
- d->timer = timer_start(1000000, &timed_menu_timeout_handler, m);
- d->command = "ls";
+ d->type = TIMED_MENU_STAT;
+ d->timer = timer_start(6000000, &timed_menu_timeout_handler, m);
+ d->command = "/home/woodblock/timed_menu_stat";
+ d->buf = NULL;
+ d->buflen = 0;
+ d->fd = -1;
+ d->pid = -1;
+ d->mtime = 0;
m->plugin_data = (void *)d;
-
+
+ timed_menu_timeout_handler(m);
return (void *)m;
}
void plugin_destroy (void *m)
{
+ timed_menu_clean_up(m);
/* this will be freed by timer_* */
timer_stop( ((Timed_Menu_Data *)TIMED_MENU(m)->plugin_data)->timer);
projects / chaz / openbox / blobdiff