= 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 [wiki:jazz/08-11-15 08-11-15@GMT-6 BUGFIX: jfbterm (1)]）
 * （續 [wiki:jazz/08-11-16 08-11-16@GMT-6 BUGFIX: jfbterm (2)]）
 * （續 [wiki:jazz/08-11-17 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)
}}}