x11 patch

--- x11_main.c.orig 2015-07-01 19:37:45.211670210 +0300
+++ x11_main.c  2015-07-01 19:43:21.540775063 +0300
@@ -14,6 +14,11 @@
 #include <unistd.h>
 #include <signal.h>

+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <pwd.h>
+
 #define mupdf_icon_bitmap_16_width 16
 #define mupdf_icon_bitmap_16_height 16
 static unsigned char mupdf_icon_bitmap_16_bits[] = {
@@ -328,8 +333,139 @@ void wincopyfile(char *source, char *tar
    }
 }

+char *get_path_to_marks()
+{
+   char *path = malloc(PATH_MAX);
+   if (path == NULL)
+   {
+       fprintf(stderr, "error: couldn't allocate memory");
+       return NULL;
+   }
+   char *homedir;
+   if ((homedir = getenv("HOME")) == NULL)
+   {
+       homedir = getpwuid(getuid())->pw_dir;
+   }
+   strcpy(path, homedir);
+   strcat(path, "/.mupdf_marks");
+   return path;
+}
+
+void read_marks(pdfapp_t *app, char *filename)
+{
+   FILE *marks_file;
+   char line[LINE_MAX];
+   char *marks_path = get_path_to_marks();
+   if (marks_path == NULL)
+   {
+       return;
+   }
+   if ((marks_file = fopen(marks_path, "r")) != NULL)
+   {
+       while (fgets(line, LINE_MAX, marks_file))
+       {
+           line[strlen(line)-1] = '\0';
+           if (!strcmp(line, realpath(filename, NULL)))
+           {
+               if (!fgets(line, LINE_MAX, marks_file))
+               {
+                   break;
+               }
+               int pageno;
+               char *tail;
+               char *head = line;
+               for (int i = 0; i < nelem(app->marks); i++)
+               {
+                   if (*head == ' ')
+                   {
+                       head++;
+                   }
+                   else if (*head == 0)
+                   {
+                       break;
+                   }
+                   errno = 0;
+                   pageno = strtol(head, &tail, 10);
+                   if (errno)
+                   {
+                       fprintf(stderr, "error: %s\n", strerror(errno));
+                       break;
+                   }
+                   else
+                   {
+                       app->marks[i] = pageno;
+                   }
+                   head = tail;
+               }
+               break;
+           }
+           fgets(line, LINE_MAX, marks_file);
+       }
+   }
+   free(marks_path);
+}
+
+void write_marks(pdfapp_t *app)
+{
+   int not_all_zeros = 0;
+   char *marks_path = get_path_to_marks();
+   if (marks_path == NULL)
+   {
+       return;
+   }
+   for (int i = 0; i < nelem(app->marks); i++)
+   {
+       if (app->marks[i] != 0)
+       {
+           not_all_zeros = 1;
+           break;
+       }
+   }
+   if (not_all_zeros) {
+       FILE *marks_file = fopen(marks_path, "r");
+       char template[] = "./mupdfXXXXXX";
+       int tmpfd = mkstemp(template);
+       if (tmpfd != -1)
+       {
+           FILE *new_marks_file = fdopen(tmpfd, "a+");
+           char line[LINE_MAX];
+           int found = 0;
+           if (marks_file)
+           {
+               while (fgets(line, LINE_MAX, marks_file))
+               {
+                   fprintf(new_marks_file, "%s", line);
+                   line[strlen(line)-1] = '\0';
+                   if (!found && !strcmp(line, realpath(app->docpath, NULL)))
+                   {
+                       for (int i = 0; i < nelem(app->marks); i++)
+                       {
+                           fprintf(new_marks_file, (i>0?" %d":"%d"), app->marks[i]);
+                       }
+                       fprintf(new_marks_file, "\n");
+                       found = 1;
+                       fgets(line, LINE_MAX, marks_file);
+                   }
+               }
+           }
+           if (!found)
+           {
+               fprintf(new_marks_file, "%s\n", realpath(app->docpath, NULL));
+               for (int i = 0; i < nelem(app->marks); i++)
+               {
+                   fprintf(new_marks_file, (i>0?" %d":"%d"), app->marks[i]);
+               }
+               fprintf(new_marks_file, "\n");
+           }
+           rename(template, marks_path);
+       }
+   }
+   free(marks_path);
+}
+
 void cleanup(pdfapp_t *app)
 {
+   write_marks(app);
    fz_context *ctx = app->ctx;

    pdfapp_close(app);
@@ -884,6 +1020,7 @@ int main(int argc, char **argv)
    tmo_at.tv_usec = 0;
    timeout = NULL;

+   read_marks(&gapp, filename);
    pdfapp_open(&gapp, filename, 0);

    FD_ZERO(&fds);