Any way to know beforehand if SUDO is (going to be) needed?
I'm using virtual file-system in /proc/ to print out 1)current working directory (CWD): ls /proc/$PID/cwd
2)command line*: cat /proc/$PID/cmdline
and 3)# of open files: ls /proc/$PID/fdinfo | wc -l
All above snippets are part of printfs.
Now, some processes complain about SUDO privileges (e.g. init: ls: cannot access /proc/1/cwd: Permission denied).
Is it possible to know beforehand if action/command will require SUDO? For example, is there a "maximum PID number", above which no process needs SUDO?
Following snippet checks if user ran the script as SUDO, but I'd need to know beforehand if there will be an "error": if [ $UID -eq 0 ] ; then
BTW: In following printf snippet with 2 arguments, printf "%15s %s\n" CWD: "$((ls /proc/$PID/cwd) | tr '\n' ' ')"if ls returns error cannot open directory /proc/1/fd: Permission denied it outputs this error before"CWD:", like so:
Why this happens?
*tldp.org says that
Quote:
cmdline file holds the command-line arguments the process was invoked with
so I'm not sure if "command-line arguments" is what was meant by "command line".
Last edited by courteous; 12-11-2010 at 12:01 PM..
Scenario: I have two servers, A and B. Server A is using autosys to connect to server B via ssh in order to run scripts. The scripts to be run on server B must be run by user "weblogic".
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Hi! I'm very new to unix, so please keep that in mind with the level of language used if you choose to help :D Thanks!
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Hello,
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Discussion started by: willyb
5 Replies
LEARN ABOUT LINUX
set_color
set_color(1) fish set_color(1)NAME
set_color - set_color - set the terminal color
set_color - set the terminal color
Synopsis
set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]
Description
Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
cyan, white and normal.
o -b, --background Set the background color
o -c, --print-colors Prints a list of all valid color names
o -h, --help Display help message and exit
o -o, --bold Set bold or extra bright mode
o -u, --underline Set underlined mode
o -v, --version Display version and exit
Calling set_color normal will set the terminal color to whatever is the default color of the terminal.
Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
font color, while set_color --bold white will result in a white font color.
Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.
set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
ncurses and recompile fish against it in order to fix this issue.
Version 1.23.1 Sun Jan 8 2012 set_color(1)