fs.c

   1 #define _XOPEN_SOURCE
   2 #include <sys/time.h>
   3 #include <unistd.h>
   4 #include <string.h>
   5 #include <assert.h>
   6 #include <errno.h>
   7 #include <stdio.h>
   8 #include <fcntl.h>
   9 #include <time.h>
  10 #include "config.h"
  11 #include "bool.h"
  12 #include "fail.h"
  13 #include "fs.h"
  14
  15 char   feed_title[TEXT_BUFFER_SIZE] = { 0 };
  16 time_t feed_date = 0;
  17 time_t feed_date_new = 0;
  18 bool   feed_is_open = false;
  19
  20 char   item_title[TEXT_BUFFER_SIZE] = { 0 };
  21 char   item_link [TEXT_BUFFER_SIZE] = { 0 };
  22 char   item_desc [TEXT_BUFFER_SIZE] = { 0 };
  23 time_t item_date = 0;
  24
  25 void sanitize(char* str)
  26 {
  27         char* evil;
  28         while ((evil = strchr(str, '/'))) *evil = '\\';
  29 }
  30
  31 void set_item_date(const char* date)
  32 {
  33         struct tm t;
  34         assert(strptime(date, "%a, %d %b %Y %T %z", &t));
  35         item_date = mktime(&t);
  36         assert(item_date != -1);
  37         if (item_date <= feed_date) {
  38                 printf("No new feeds assumed.\n");
  39                 fail(0);
  40         } else if (item_date > feed_date_new) {
  41                 feed_date_new = item_date;
  42         }
  43 }
  44
  45 void set_item_link(const char* link)
  46 {
  47         strncpy(item_link, link, TEXT_BUFFER_SIZE);
  48 }
  49
  50 void set_item_desc(const char* desc)
  51 {
  52         strncpy(item_desc, desc, TEXT_BUFFER_SIZE);
  53 }
  54
  55 void set_item_title(const char* title)
  56 {
  57         strncpy(item_title, title, TEXT_BUFFER_SIZE);
  58         sanitize(item_title);
  59 }
  60
  61 void feed_open(const char* title)
  62 {
  63         struct stat st;
  64
  65         strncpy(feed_title, title, TEXT_BUFFER_SIZE);
  66         sanitize(feed_title);
  67
  68         if (!stat(feed_title, &st)) feed_date = st.st_mtime;
  69         mkdir(feed_title, 0755);
  70         assert(!chdir(feed_title));
  71         feed_is_open = true;
  72 }
  73
  74
  75
  76 void feed_flush()
  77 {
  78         struct timeval times[2];
  79         times[0].tv_sec  = feed_date_new;
  80         times[0].tv_usec = 0;
  81         times[1].tv_sec  = feed_date_new;
  82         times[1].tv_usec = 0;
  83
  84         if (!feed_is_open) return;
  85
  86         assert(!chdir(".."));
  87         assert(!utimes(feed_title, times));
  88         feed_is_open = false;
  89 }
  90
  91 void item_flush()
  92 {
  93         struct timeval times[2];
  94         FILE* f;
  95         char buf[FILE_NAME_LENGTH + 1];
  96         assert(feed_is_open);
  97
  98         if (item_title[0]) {
  99                 strncpy(buf, item_title, 32);
 100         } else {
 101                 assert(item_desc[0]);
 102                 strncpy(buf, item_desc, 32);
 103         }
 104
 105         assert(f = fopen(buf, "w"));
 106         if (item_title[0]) {
 107                 fprintf(f, "%s\n\n", item_title);
 108         }
 109         if (item_desc[0]) {
 110                 fprintf(f, "%s\n\n", item_desc);
 111         }
 112         if (item_link[0]) {
 113                 fprintf(f, "Link: <a href=\"%s\">%s</a>\n", item_link, item_link);
 114         }
 115         fclose(f);
 116
 117         /* FIXME: item date might not have been set. */
 118         times[0].tv_sec  = item_date;
 119         times[0].tv_usec = 0;
 120         times[1].tv_sec  = item_date;
 121         times[1].tv_usec = 0;
 122
 123         assert(!utimes(buf, times));
 124 }