August 30, 2012

hg serve multiple projects

1. Create a file under the parent directory of the multiple project hg directories
#> cat webconf
repos/ = .

allow_push = *
push_ssl = false

2.  hg serve --web-conf ./webconf -d

debian add key

sudo gpg --keyserver --recv-keys 55BE302B
sudo gpg -a --export 55BE302B | sudo apt-key add -

August 29, 2012

vim man page skip command line

In vim, when you want to get the man page of the word under the cursor, you can just type shift-k or "K". However, for some functions, there is a "command line" tool with the same time, so you will get the man page for that command line instead of the function you are looking for.

For example, if you hit "K" on "unlink", you will get the bash unlink man page instead of the system call unlink(). To solve this problem, put the following line in your .bashrc:

    export MANSECT=3,2,1,4,5,6,7,8,9

This tells man to search section 3 first, then section 2, then section 1, etc., thus solved the problem of section 1 coming up before section 2 or 3.

While on this topic, you can also add the following line to your .bashrc file to make your man page have colors. Make sure you installed the program "most" on your computer.

    export MANPAGER="/usr/bin/most -s"

Or you can use the default "less" program and add the following lines to .bashrc to make "less" colorful:

man() {
 env \
  LESS_TERMCAP_mb=$(printf "\e[1;31m") \
  LESS_TERMCAP_md=$(printf "\e[1;31m") \
  LESS_TERMCAP_me=$(printf "\e[0m") \
  LESS_TERMCAP_se=$(printf "\e[0m") \
  LESS_TERMCAP_so=$(printf "\e[1;44;33m") \
  LESS_TERMCAP_ue=$(printf "\e[0m") \
  LESS_TERMCAP_us=$(printf "\e[1;32m") \
   man "$@"

August 23, 2012

Flags to enable thorough and verbose g++ warnings

Flags to enable thorough and verbose g++ warnings

-pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wswitch-default -Wundef -Werror-Wno-unused

A good base setup for C is:
-std=c99 -pedantic -Wall -Wextra -Wwrite-strings -Werror
and for C++
-ansi -pedantic -Wall -Wextra -Weffc++

My C++ version:

-g -O -Wall -Wextra -Weffc++ -pedantic -Wformat=2 \
 -Waggregate-return -Wcast-align \
 -Wcast-qual   -Wconversion \
 -Wdisabled-optimization  -Wfloat-equal   \
 -Winit-self  -Winline \
 -Winvalid-pch   -Wunsafe-loop-optimizations  -Wmissing-braces \
 -Wmissing-format-attribute   \
 -Wmissing-include-dirs \
 -Wpacked  -Wpadded -Wpointer-arith \
 -Wredundant-decls -Wshadow  -Wstack-protector \
 -Wswitch-default  -Wswitch-enum \
 -Wunknown-pragmas  -Wunreachable-code -Wunused \
 -Wvariadic-macros  -Wwrite-strings \
 -Wlogical-op -Wsign-conversion  \
 -Wstrict-overflow=5 -Wundef

August 2, 2012

Windows 7 change alt-tab preview deplay

Open Registry Editor and create the following registry key:


In that key, create the following DWORD value: LivePreview_ms and set it to the delay (in milliseconds) of the first live preview.

Restart Explorer to see the changes.

Other Aero-peek related registry entries that I've found on the net are:



These control the delay of other components of Aero-peek.

Give regular user right to start/stop service in Windows 7

  1. Download and install SubInACL.exe
  2. run "C:\Program Files\Windows Resource Kits\Tools\subinacl" /service Spooler /grant=<username>=TO
SubInACL works on Windows 7.
The T grant parameter is for start service access and the O parameter is stop service access.
Now <username> can:
  • run sc stop Spooler and sc start Spooler
  • run net stop "Print Spooler" and net start "Print Spooler"
  • use the Restart button on the Print Spooler item in services.msc

Update: The single subinacl.exe download seems to be not available anymore. Try download the windows 2003 resource toolkit at

Windows Server 2003 Resource Kit Tools