2009-01-14

• Trac Wiki 改名的終極方法: 到 db/trac.db 去改內容

  # sqlite3 db/trac.db
  sqlite> update wiki set name='BOINC/Server' where name='BOINC_Server';
  

• 如果有附件(Attachment)的話，比較麻煩 (1) 改 wiki (2) 改 attachment (3) 必須到 attachments/wiki/ 目錄去搬檔案

  # sqlite3 db/trac.db
  sqlite> update wiki set name='FlyCircuit/2008-03-26' where name='FlyCircit/2008-03-26';
  sqlite> update attachment set id='FlyCircuit/2008-03-26' where id='FlyCircit/2008-03-26';
  sqlite> update wiki set name='FlyCircuit/2008-06-24' where name='FlyCircit/2008-06-24';
  sqlite> update attachment set id='FlyCircuit/2008-06-24' where id='FlyCircit/2008-06-24';
  

BUGFIX: jfbterm (4)

• （續 08-11-15@GMT-6 BUGFIX: jfbterm (1)）
• （續 08-11-16@GMT-6 BUGFIX: jfbterm (2)）
• （續 08-11-17@GMT-6 BUGFIX: jfbterm (3)）

• 在看 fbcommon.c 時，發現在這組出現錯誤的 mmap 前曾跑過另一組 mmap, 因此把參數印出來對照看看。
• gdb debug 程序

  file jfbterm
  set args -e ls
  show args
  break fbcommon.c:500
  break fbcommon.c:557
  break fbcommon.c:566
  run
  p fb_fix
  c
  p fb_fix
  c
  p fb_fix.smem_len
  p p->soff
  p p->slen
  p fb_fix.mmem_len
  p p->moff
  p p->mlen
  

  This GDB was configured as "x86_64-linux-gnu".
  (gdb) file jfbterm
  Reading symbols from /root/jfbterm-0.4.7-dev/jfbterm...done.
  (gdb) set args -e ls
  (gdb) show args
  Argument list to give program being debugged when it is started is "-e ls".
  (gdb) break fbcommon.c:500
  Breakpoint 1 at 0x40303d: file fbcommon.c, line 500.
  (gdb) break fbcommon.c:557
  Breakpoint 2 at 0x40327e: file fbcommon.c, line 557.
  (gdb) break fbcommon.c:566
  Breakpoint 3 at 0x403301: file fbcommon.c, line 566.
  (gdb) run
  Starting program: /root/jfbterm-0.4.7-dev/jfbterm -e ls
  Breakpoint 1, tfbm_open (p=0x6146e0) at fbcommon.c:501
  501             if (fb_var.yres_virtual != fb_var.yres) {
  (gdb) p fb_fix
  $1 = {id = "▒▒C▒\210\177\000\000\006\000\000\000\000\000\000", smem_start = 30778096, smem_len = 3032756978, type = 32648, type_aux = 0, visual = 0,
    xpanstep = 65535, ypanstep = 65535, ywrapstep = 65535, line_length = 1, mmio_start = 15, mmio_len = 30816528, accel = 0, reserved = {53071, 64, 0}}
  (gdb) c
  Continuing.
  Breakpoint 2, tfbm_open (p=0x6146e0) at fbcommon.c:557
  557             p->smem = (u_char*)mmap(NULL, p->slen, PROT_READ|PROT_WRITE,
  (gdb) p fb_fix
  $2 = {id = "VESA VGA\000\000\000\000\000\000\000", smem_start = 4026531840, smem_len = 1572864, type = 0, type_aux = 0, visual = 3, xpanstep = 0,
    ypanstep = 0, ywrapstep = 0, line_length = 1024, mmio_start = 0, mmio_len = 0, accel = 0, reserved = {0, 0, 0}}
  (gdb) c
  Continuing.
  
  Breakpoint 3, tfbm_open (p=0x6146e0) at fbcommon.c:566
  566             if(p->mlen == 0)
  (gdb) p fb_fix.smem_len
  $3 = 1572864
  (gdb) p p->soff
  $4 = 0
  (gdb) p p->slen
  $5 = 1572864
  (gdb) p fb_fix.mmem_len
  There is no member named mmem_len.
  (gdb) p p->moff
  $6 = 0
  (gdb) p p->mlen
  $7 = 0
  (gdb)