**
** Show the content of the error log.  Only the administrator can view
** this page.
*/
void errorlog_page(void){
  i64 szFile;
  FILE *in;
  char *zLog;
  char z[10000];
  login_check_credentials();
  if( !g.perm.Admin ){
    login_needed(0);
    return;
  }
  style_header("Server Error Log");
  style_submenu_element("Test", "%R/test-warning");
  style_submenu_element("Refresh", "%R/errorlog");
  style_submenu_element("Log-Menu", "%R/setup-logmenu");
  style_submenu_element("Panics", "%R/paniclog");

  if( g.zErrlog==0 || fossil_strcmp(g.zErrlog,"-")==0 ){
    no_error_log_available();
    style_finish_page();
    return;
  }
  if( P("truncate1") && cgi_csrf_safe(2) ){

    @ <p>Confirm that you want to truncate the %,lld(szFile)-byte error log:
    @ <input type="submit" name="truncate1" value="Confirm">
    @ <input type="submit" name="cancel" value="Cancel">
    @ </form>
    style_finish_page();
    return;
  }
  zLog = file_canonical_name_dup(g.zErrlog);
  @ <p>The server error log at "%h(zLog)" is %,lld(szFile) bytes in size.
  fossil_free(zLog);
  style_submenu_element("Download", "%R/errorlog?download");
  style_submenu_element("Truncate", "%R/errorlog?truncate");
  in = fossil_fopen(g.zErrlog, "rb");
  if( in==0 ){
    @ <p class='generalError'>Unable to open that file for reading!</p>
    style_finish_page();
    return;
  }
  if( szFile>MXSHOWLOG && P("all")==0 ){
    @ <form action="%R/errorlog" method="POST">
    @ <p>Only the last %,d(MXSHOWLOG) bytes are shown.
    @ <input type="submit" name="all" value="Show All">
    @ </form>
    fseek(in, -MXSHOWLOG, SEEK_END);
  }
  @ <hr>
  @ <pre>
  while( fgets(z, sizeof(z), in) ){
    @ %h(z)\
  }
  fclose(in);
  @ </pre>
  style_finish_page();
}

/*
** WEBPAGE: paniclog
**
** Scan the error log for panics.  Show all panic messages, ignoring all
** other error log entries.
*/
void paniclog_page(void){
  i64 szFile;
  char *zLog;
  FILE *in;
  int bOutput = 0;
  int prevWasTime = 0;
  char z[10000];
  char zTime[10000];

  login_check_credentials();
  if( !g.perm.Admin ){
    login_needed(0);
    return;
  }
  style_header("Server Panic Log");
  style_submenu_element("Log-Menu", "%R/setup-logmenu");

  if( g.zErrlog==0 || fossil_strcmp(g.zErrlog,"-")==0 ){
    no_error_log_available();
    style_finish_page();
    return;
  }
  in = fossil_fopen(g.zErrlog, "rb");
  if( in==0 ){
    @ <p class='generalError'>Unable to open that file for reading!</p>
    style_finish_page();
    return;
  }
  szFile = file_size(g.zErrlog, ExtFILE);
  zLog = file_canonical_name_dup(g.zErrlog);
  @ Panic messages contained within the %lld(szFile)-byte 
  @ <a href="%R/errorlog?all">error log</a> found at
  @ "%h(zLog)".
  fossil_free(zLog);
  @ <hr>
  @ <pre>
  while( fgets(z, sizeof(z), in) ){
    if( prevWasTime
     && (strncmp(z,"panic: ", 7)==0 || strstr(z," assertion fault ")!=0)
    ){
      @ %h(zTime)\
      bOutput = 1;
    }
    if( strncmp(z, "--------", 8)==0 ){
      size_t n = strlen(z);
      memcpy(zTime, z, n+1);
      prevWasTime = 1;
      bOutput = 0;
    }else{
      prevWasTime = 0;
    }
    if( bOutput ){
      @ %h(z)\
    }
  }
  fclose(in);
  @ </pre>
  style_finish_page();
}

    blob_appendf(&desc,"The error log is disabled for this repository.");
  }else{
    blob_appendf(&desc,"In this repository, the error log is in the file"
       "named \"%s\".", g.zErrlog);
  }
  setup_menu_entry("Error Log", "errorlog", blob_str(&desc));
  blob_reset(&desc);

  setup_menu_entry("Panic Log", "paniclog",
    "The panic log is a filtering of the Error Log that shows only the\n"
    "most important messages - assertion faults, segmentation faults, and\n"
    "similar malfunctions."
  );

  setup_menu_entry("User Log", "user_log",
    "The user log is a record of login attempts.  The user log is stored\n"
    "in the \"accesslog\" table of the respository.\n"
  );

  @ </table>