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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 MOJAVE

time

TIME(1) 						    BSD General Commands Manual 						   TIME(1)

NAME

     time -- time command execution

SYNOPSIS

     time [-lp] utility

DESCRIPTION

     The time utility executes and times utility.  After the utility finishes, time writes the total time elapsed, the time consumed by system
     overhead, and the time used to execute utility to the standard error stream.  Times are reported in seconds.

     Available options:

     -l      The contents of the rusage structure are printed.

     -p      The output is formatted as specified by IEEE Std 1003.2-1992 (``POSIX.2'').

     Some shells may provide a builtin time command which is similar or identical to this utility.  Consult the builtin(1) manual page.

DIAGNOSTICS

     The time utility shall exit with one of the following values:

     1-125   An error occurred in the time utility.

     126     The utility was found but could not be invoked.

     127     The utility could not be found.

     Otherwise, the exit status of time shall be that of utility.

SEE ALSO

     builtin(1), csh(1), getrusage(2)

FILES

     /usr/include/sys/resource.h

STANDARDS

     The time utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').

BUGS

     The granularity of seconds on microprocessors is crude and can result in times being reported for CPU usage which are too large by a second.

BSD
								   June 6, 1993 							       BSD
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