release/src/router/httpd/webmsg.c

   1 /*
   2
   3         Tomato Firmware
   4         Copyright (C) 2006-2009 Jonathan Zarate
   5
   6 */
   7
   8 #include "tomato.h"
   9
  10 #include <sys/stat.h>
  11
  12
  13
  14 static const char webMsgFile[] = "/tmp/.webmsg";
  15
  16
  17 void setWebMsg(const char *s)
  18 {
  19         FILE *f;
  20         if (s) {
  21                 if ((f = fopen(webMsgFile, "w")) != NULL) {
  22                         fputs(s, f);
  23                         fclose(f);
  24                 }
  25         }
  26         else {
  27                 unlink(webMsgFile);
  28         }
  29 }
  30
  31 void getWebMsg(char *s, int max)
  32 {
  33         FILE *f;
  34         int n;
  35
  36         if ((f = fopen(webMsgFile, "r")) != NULL) {
  37                 n = fread(s, 1, max - 1, f);
  38                 s[n] = 0;
  39                 fclose(f);
  40                 unlink(webMsgFile);
  41         }
  42         else s[0] = 0;
  43 }
  44
  45 int webMsgExist(void)
  46 {
  47         struct stat st;
  48         return ((stat(webMsgFile, &st) == 0) && (st.st_size > 0));
  49 }
  50
  51 void asp_webmsg(int argc, char **argv)
  52 {
  53         char s[512];
  54         const char *msg = s;
  55
  56         getWebMsg(s, sizeof(s));
  57         if (s[0] == 0) {
  58                 if (argc == 0) return;
  59                 msg = argv[0];
  60         }
  61         if ((argc >= 2) && (argv[1][0] == '1')) web_putj(msg);
  62         else web_puth(msg);
  63 }
  64
  65