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Full Discussion: Return or exit codes apart from 0 have a meaning?
Top Forums Programming Return or exit codes apart from 0 have a meaning? Post 302952861 by Don Cragun on Sunday 23rd of August 2015 04:40:36 PM
Old 08-23-2015
By convention in the standards:
Code:
0	success
1-125	a program specific failure
126	when trying to execute a command, a file was found with the
	specified command name, but it was not executable
127	when trying to execute a command, no file was found with the
	specified command name
>128	the command was terminated by a signal (signal number being exit
	status - 128)

Some systems have considerably more conventions for the 1-125 exit status range (for example, look at /usr/include/sysexits.h on BSD systems).
These 3 Users Gave Thanks to Don Cragun For This Post:
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LEARN ABOUT FREEBSD

timeout

TIMEOUT(1)						    BSD General Commands Manual 						TIMEOUT(1)

NAME

     timeout -- run a command with a time limit

SYNOPSIS

     timeout [--signal sig | -s sig] [--preserve-status] [--kill-after time | -k time] [--foreground] <duration> <command> <args ...>

DESCRIPTION

     timeout starts the command with its args. If command is still running after duration, it is killed.  By default, SIGTERM. is sent.

     --preserve-status		 Always exits with the same status as command even if it times out.

     --foreground		 Do not propagate timeout to the command children.

     -s sig, --signal sig	 Specify the signal to send on timeout.  By default, SIGTERM.  is sent.

     -k time, --kill-after time  Send a second kill signal if command is still running after time after the first signal was sent.

DURATION FORMAT

     duration and time can be integer or decimal numbers.  Values without unit symbols are interpreted as seconds.

     Supported unit symbols are:
     s	     seconds
     m	     minutes
     h	     hours
     d	     days

EXIT STATUS

     If the timeout was not reached, the exit status of command is returned.

     If the timeout was reached and --preserve-status is set, the exit status of command is returned.  If --preserve-status is not set, an exit
     status of 124 is returned.

     If command exits after receiving a signal, the exit status returned is the signal number plus 128.

     If command is an invalid command, the exit status returned is 126.

     If command is a non existing command, the exit status returned is 127.

     If an invalid parameter is passed to -s or -k, the exit status return is 125.

SEE ALSO

     kill(1), signal(3)

BSD
								   Oct 28, 2014 							       BSD
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