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Top Forums UNIX for Dummies Questions & Answers return code capturing for all commands connected by "|" ... Post 302268048 by new_learner on Monday 15th of December 2008 12:40:43 AM
Old 12-15-2008
Question return code capturing for all commands connected by "|" ...

Hi,

While I am using "|" to join multiple commands, I am not getting the return code when there is error in one of the commnads.

Eg:

b=`find /path/a*.out | xargs basename`

if [ $? != 0 ]; then
echo "Error"
fi

if there is error while finding the file or getting the basename, the $? is having zero value. But I require to know any error in that line of code.

Can any one tell me how to capture error in all the commands that are connected by "|" and make sure every one succeeded before proceeding further.

Thanks and Regards
 

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BASENAME(3)						   BSD Library Functions Manual 					       BASENAME(3)

NAME
basename -- return the last component of a pathname LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <libgen.h> char * basename(char *path); DESCRIPTION
The basename() function takes the pathname pointed to by path and returns a pointer to the final component of the pathname, deleting any trailing '/' characters. If path consists entirely of '/' characters, basename() returns a pointer to the string ``/''. If path is a null pointer or points to an empty string, basename() returns a pointer to the string ``.''. RETURN VALUES
The basename() function returns a pointer to the final component of path. SEE ALSO
basename(1), dirname(3) STANDARDS
o X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'') o IEEE Std 1003.1-2001 (``POSIX.1'') BUGS
If the length of the result is longer than PATH_MAX bytes (including the terminating nul), the result will be truncated. The basename() function returns a pointer to static storage that may be overwritten by subsequent calls to basename(). This is not strictly a bug; it is explicitly allowed by IEEE Std 1003.1-2001 (``POSIX.1''). BSD
May 10, 2008 BSD
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