02-20-2008
Quote:
Originally Posted by
joeyg
In shell scripting, one can do an "if [ -e filename ] " kind of thing
you can if (-f "/etc/passwd") { warn "file exists" } in perl too, most of the modern test flags exist.
the big problem i have is when the file is after the mundane open(FH,..) that your doing. and the print FH "" fails. This take a little bit of care and feeding but its worth it imo.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I am trying to test arguments to see if they are files in any directory.
I have :
but it's not working (7 Replies)
Discussion started by: skooly5
7 Replies
2. Shell Programming and Scripting
Hi ,
My requirement is that i need to search for a number of strings in a log file and print them with line numbers.The search should be date wise.
The sample log file is :
Jan 17 02:45:34 srim6165 MQSIv500: (UKBRKR1P_B.LZ_
BENCHMARKS)BIP2648E: Message backed out to a queue; node... (6 Replies)
Discussion started by: charudpss
6 Replies
3. Shell Programming and Scripting
Hello, I'm a computer science major and I'm having problems dealing with file names with spaces in them. Particularly I'm saving a file name in a variable and then using the variable in a compare function i.e.
a='te xt.txt'
b='file2.txt'
cmp $a $b
If anyone could help me with this particular... (10 Replies)
Discussion started by: jakethegreycat
10 Replies
4. Shell Programming and Scripting
Hello,
I want to run one (not multiple) action if an element doesn't exist in array.
for example:
@array = (1..10);
foreach $el (@array)
{
if ($el != 11)
{
print "number not found\n";
}
}
the output of this simple script:
number not found (3 Replies)
Discussion started by: ahmed_zaher
3 Replies
5. Shell Programming and Scripting
Hi, I just wondering I done program which will list .jpg extension file but if there is not .jpg file in current directory display error how to do it ; here is my code
#!/bin/sh
echo "Enter a program function :" # declear User input
read func1 func2
## user must input list follow by... (1 Reply)
Discussion started by: guidely
1 Replies
6. Shell Programming and Scripting
Hello, I am working on a coding project for a class and to test the program I have created, I have come up with 100 different test cases. The program takes four text files as input, so each of the test cases is contained in a folder with four files.
I have a folder called 'tests', within which... (1 Reply)
Discussion started by: dpryor
1 Replies
7. UNIX for Dummies Questions & Answers
I write this bit of code to calculate the mean and variance for all the files in one directory and print the mean and variance in a separate folder but with the same file name.
FILES="data/*"
for X in $FILES
do
name=$(basename $X)
awk '{x=$0; s+=$0; n++}
END{mean=s/n; for (i in x){ss... (20 Replies)
Discussion started by: A-V
20 Replies
8. Shell Programming and Scripting
Korn Shell
I have hundreds of small files like below created every day. A midnight cron job moves them to the location /u04/temp/logs
But sometimes I have to manually move these files based a certain dates or time.
I have two basic requirements
1.Using mv command I want to move all .dat... (2 Replies)
Discussion started by: kraljic
2 Replies
9. Shell Programming and Scripting
Hello,
I'm attempting to write a tool that checks an IP address for existing PTR records then if there are no PTR records does a ping to see if it response.
Then if there is no response, it should print a message saying
This is what I have so far.
#!/usr/bin/perl
$nxdomain =... (4 Replies)
Discussion started by: spartan22
4 Replies
10. Shell Programming and Scripting
The following command to replace text in place in multiple files in a directory is tripping up on filename spaces (Windows environment). I really don't know Perl.
find '\\server\directory' | xargs perl -pi -e 's/textA/textB/g'Mike (2 Replies)
Discussion started by: Michael Stora
2 Replies
pwck(1M) System Administration Commands pwck(1M)
NAME
pwck, grpck - password/group file checkers
SYNOPSIS
/usr/sbin/pwck [filename]
/usr/sbin/grpck [filename]
DESCRIPTION
pwck scans the password file and notes any inconsistencies. The checks include validation of the number of fields, login name, user ID,
group ID, and whether the login directory and the program-to-use-as-shell exist. The default password file is /etc/passwd.
grpck verifies all entries in the group file. This verification includes a check of the number of fields, group name, group ID, whether any
login names belong to more than NGROUPS_MAX groups, and that all login names appear in the password file. The default group file is
/etc/group.
All messages regarding inconsistent entries are placed on the stderr stream.
FILES
/etc/group
/etc/passwd
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
getpwent(3C), group(4), passwd(4), attributes(5)
DIAGNOSTICS
Group entries in /etc/group with no login names are flagged.
Group file 'filename' is empty
The /etc/passwd or /etc/group file is an empty file.
cannot open file filename: No such file or directory
The /etc/passwd or /etc/group file does not exist.
NOTES
If no filename argument is given, grpck checks the local group file, /etc/group, and also makes sure that all login names encountered in
the checked group file are known to the system getpwent(3C) routine. This means that the login names may be supplied by a network name
service.
SunOS 5.10 20 Oct 2002 pwck(1M)