This patch enables saving tags to disk when dwm exits,
and loading from disk on startup.
(especially useful when you need to recompile and restart dwm.)
diff --git a/dwm.c b/dwm.c
--- a/dwm.c
+++ b/dwm.c42a43,45
> #define INFO_FMT_WRITE "%ld %u\n", c->win, c->tags
> #define INFO_FMT_READ "%ld %u\n", &c_win, &c_tags
>
196a201
> static void loadinfo(void);
210a218
> static void saveinfo(void);
1114a1134,1162
> loadinfo(void) {
> Client *c;
> Monitor *m;
> FILE *sf;
> long int c_win;
> unsigned int c_tags;
> long int wins[500][2];
> int i, j;
> if ((sf = fopen(saveinfofile, "r")) == NULL)
> return;
> i = 0;
> while (fscanf(sf, INFO_FMT_READ) != EOF) {
> wins[i][0] = c_win;
> wins[i][1] = (long)c_tags;
> i++;
> }
> fclose(sf);
> for(m = mons; m; m = m->next) {
> for(c = m->clients; c; c = c->next) {
> for(j = 0; c->win != wins[j][0] && j < i; j++);
> if (wins[j][0] != c->win)
> continue;
> c->tags = (unsigned int)wins[j][1];
> }
> }
> arrange(selmon);
> }
>
> void
1135a1184
> free(t);
1462a1562,1574
> saveinfo(void) {
> Client *c;
> Monitor *m;
> FILE *sf;
> if ((sf = fopen(saveinfofile, "w")) == NULL)
> return;
> for(m = mons; m; m = m->next)
> for(c = m->clients; c; c = c->next)
> fprintf(sf, INFO_FMT_WRITE);
> fclose(sf);
> }
>
> void
2079a2192
> loadinfo();
2080a2194
> saveinfo();
