check for "cannot open file" Post: 302108431

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Top Forums UNIX for Dummies Questions & Answers check for "cannot open file" Post 302108431 by ssmith001 on Monday 26th of February 2007 12:29:32 PM

02-26-2007

Registered User

check for "cannot open file"

I have a small script that checks to see if a file exists and that it has data in it. I also need to check if the file can be opened. I had an issue today where the file it checks could not be opened and my script did not catch it. How do I check to see if it cannot be opened?

Code:

dirname=/opt/manu/srv
f1=manumgrmdip2_7500.log
f2=manumgrmdip2_7500.pid
export HOST=`hostname`
f1size=`wc -c $dirname/manumgrmdip2_7500.log | cut -f1 -d " "`
f2size=`wc -c $dirname/manumgrmdip2_7500.pid | cut -f1 -d " "`

if [[ ! -f $dirname/$f1 || ! -f $dirname/$f2 ]] ; then
      echo "Either <$dirname/$f1> or <$dirname/$f1> does not exist" | mailx -s "Missing files on Manugistics $HOST Server (MDIP2)" user@xyz.com
else if (( $(wc -c < $dirname/$f1) != 0 )) || (( $(wc -c < $dirname/$f2) > 6 )) ; then
      echo "The size of $dirname/$f1 size = $f1size, and $dirname/$f2 = $f2size'" | mailx -s "Error with file sizes on Manugistics $HOST Server (MDIP2)" user@xyz.com < manumgrmdip2_7500.log
     fi;
fi;

ssmith001

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LEARN ABOUT NETBSD

dirname

DIRNAME(3)						   BSD Library Functions Manual 						DIRNAME(3)

NAME

     dirname -- report the parent directory name of a file pathname

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <libgen.h>

     char *
     dirname(char *path);

DESCRIPTION

     The dirname() function takes a pointer to a character string that contains a pathname, path, and returns a pointer to a string that is a
     pathname of the parent directory of path.	Trailing '/' characters in path are not counted as part of the path.

     If path does not contain a '/', then dirname() returns a pointer to the string ``.''.

     If path is a null pointer or points to an empty string, dirname() returns a pointer to the string ``.''.

RETURN VALUES

     The dirname() function returns a pointer to a string that is the parent directory of path.

SEE ALSO

     dirname(1), basename(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 dirname() function returns a pointer to static storage that may be overwritten by subsequent calls to dirname().  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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