10-17-2006
How do you Sum UNIX return codes
Hi,
I know how to read a return code after executing a single command.
"echo $?". But I do not know how to sum the return code for a group of commands.
If I string 3 commands together and I do an echo $? all I get is the retunr code for the last command. Example below:
----------------------------
cat file1 | cut -f1-5 | sort > file2
status=$?
if [ $status -eq 0 ]; then
##continue with rest of my script
else
exit
fi
-----------------
I only get the return code for the last command, the "sort" command.
I want to make sure that the return code for all three commands added togther =0. Can this be done?
The problem is I need to amke sure all 3 commands ran succesful. My status check only tells me the last commadn worked.
Thanks in advance for any assistance.
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LEARN ABOUT FREEBSD
introduction
INTRO(1) BSD General Commands Manual INTRO(1)
NAME
intro -- introduction to general commands (tools and utilities)
DESCRIPTION
Section one of the manual contains most of the commands which comprise the BSD user environment. Some of the commands included in section
one are text editors, command shell interpreters, searching and sorting tools, file manipulation commands, system status commands, remote
file copy commands, mail commands, compilers and compiler tools, formatted output tools, and line printer commands.
All commands set a status value upon exit which may be tested to see if the command completed normally. Traditionally, the value 0 signifies
successful completion of the command, while a value >0 indicates an error. Some commands attempt to describe the nature of the failure by
using exit codes as defined in sysexits(3), while others simply set the status to an arbitrary value >0 (typically 1).
SEE ALSO
apropos(1), man(1), intro(2), intro(3), sysexits(3), intro(4), intro(5), intro(6), intro(7), security(7), intro(8), intro(9)
Tutorials in the UNIX User's Manual Supplementary Documents.
HISTORY
The intro manual page appeared in Version 6 AT&T UNIX.
BSD
October 21, 2001 BSD