01-28-2011
a couple of things. what are the values of the $lgrep and $SAM_CMD?
and logic for most UNIX commands is that a return of 0 is good so a -ne (not equal) compare to 0 should have a error message of "Error".
Now what you need to watch is that the value of $? is from the last command run before the check.so if you have a string of commands then it may not be what is expected.
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if
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Hi friends, :)
In a shell script i found the following if condition.
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Hi
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if
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'
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hi,
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if
chr1:109457160 1 109457160 99.1735537190083 +
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LEARN ABOUT FREEBSD
intro
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