|
|
Sponsored Content
Top Forums
UNIX for Dummies Questions & Answers
To check for existence of a file
Post 302540189 by rangarasan on Wednesday 20th of July 2011 02:04:10 AM
07-20-2011
Default Path
Quote:
I need to check for the existence of a file *.log in a specific directory using a perl script.
Presently am not in that particular directory.
So i am using chdir ("/path/to/my/file)
And then i am using the -e in an if statement to check if it exists.
if (-e $File) {......}
$File contains the filename and maybe the path again.
My questions are what should be stored in this $ File exactly and how exactly should the chdir command be written.
Present Dir : /home/asdf/
DIr in which the file is present: /home/ghjk/
Presently am not in that particular directory.
So i am using chdir ("/path/to/my/file)
And then i am using the -e in an if statement to check if it exists.
if (-e $File) {......}
$File contains the filename and maybe the path again.
My questions are what should be stored in this $ File exactly and how exactly should the chdir command be written.
Present Dir : /home/asdf/
DIr in which the file is present: /home/ghjk/
if you check file existence, By Default is searches in current dir[default path].
chdir is used to change the default path.
if you check file existence after chdir, it will search the files in default location that is New default path.
Cheers,
Ranga.
This User Gave Thanks to rangarasan For This Post:
|
|
10 More Discussions You Might Find Interesting
1. Solaris
Hi,
I have a script which will check the fiel existence, the lines are as below
if !(test -d ./data) then
mkdir data
fi
In the first line error occurs as below
generatelicense.sh: syntax error at line 2: `!' unexpected
Where as this script works fine in linux OS.
How to solve... (2 Replies)
Discussion started by: krevathi1912
2 Replies
2. Shell Programming and Scripting
Hi,
I would like to check the existence of files (doesn;t matter the number of files) in a directory.
My file is named in the following manner (always ending with " myfile "). Can anybody give me some guidance?
EG:
abc1_myfile
sdfr_myfile
sffgd_myfile
and so on ......
My... (9 Replies)
Discussion started by: Raynon
9 Replies
3. AIX
i can able to transfer a file from build server(AIX)to webserver using ksh through ftp.my query is to check the existence of file while transfering from one server to other .i.e i need some command or script that checks the existence of file with same name in both server,within ftp syntax.
... (1 Reply)
Discussion started by: karthikprasathk
1 Replies
4. AIX
we have tranferred an ear from local server to remote server using ftp.consider, we have an ear file named a.ear in remote server,again if we transfer the same file named a.ear from local server to remote server.we need the kshell to check the existence of the ear file in remote server,and if the... (3 Replies)
Discussion started by: karthikprasathk
3 Replies
5. AIX
Hello
I am having a requirement like if there is no file in the directory then i need a message to pop on after the execution of the script.
My script basically does for File in `ls -t $DIRECTORY | tail -1`;
if there is no file the DIRECTORY then the script is simply exiting with out... (2 Replies)
Discussion started by: dsdev_123
2 Replies
6. AIX
I have requirement where i need to search for files which start with SALESORDER and PURCHASEORDER. i need to process the files with SALESORDER first and then PURCHASEORDER. If SALESORDER files are not there i dont want to process PURCHASEORDER and i want to come out of script. I have written a code... (4 Replies)
Discussion started by: dsdev_123
4 Replies
7. Shell Programming and Scripting
i want to check if the file is in the directory or not, and also it should be handle error conditions, like missing files and report the error and exit.
i did something like this:
file ="hello"
if !test -e "${file}"
then echo "No such files exist!"
exit 1
else
do something.......
fi
... (1 Reply)
Discussion started by: mingming88
1 Replies
8. Shell Programming and Scripting
I am using the following command to check for files on a Unix (Solaris 9) and on Linux:
if (-r *.) then
echo " las file found"
else
echo " no las file found"
endif
If no las file is present, the "no las file found" message is displayed. If a las file is present, however, I get... (9 Replies)
Discussion started by: phudgens
9 Replies
9. Shell Programming and Scripting
Hi All.
Pls help me with the command to check existence of files (I'll mention name of the file as regex) and proceed with my further processing if atleast one of them exists
in detail,
I've a dir /tmp/TURP, which may or may not have files named with "exter*.txt"
I need to check and... (2 Replies)
Discussion started by: skpvalvekar
2 Replies
10. Shell Programming and Scripting
hi
i wanted to check if the file exist or not(multiple files)
DIRE=/home/V478
if ;
then
echo "file present"
else
echo "file not present"
fi
But i am getting the error as
: [: unexpected operator/operand (3 Replies)
Discussion started by: ATWC
3 Replies
LEARN ABOUT OSF1
fchdir
chdir(2) System Calls Manual chdir(2) NAME
chdir, fchdir - Changes the current directory SYNOPSIS
#include <unistd.h> int chdir ( const char *path ); int fchdir ( int filedes ); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: chdir(): XSH5.0 fchdir(): XSH5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Points to the pathname of the directory. Specifies the file descriptor of the directory. DESCRIPTION
The chdir() function changes the current directory to the directory indicated by the path parameter. The fchdir() function changes the current directory to the directory indicated by the filedes parameter. If the path parameter refers to a symbolic link, thechdir() function sets the current directory to the directory pointed to by the symbolic link. The current directory, also called the current working directory, is the starting point of searches for pathnames that do not begin with a / (slash). In order for a directory to become the current directory, the calling process must have search access to the directory. NOTES
The current working directory is shared between all threads within the same process. Therefore, one thread using the chdir() or fchdir() functions will affect every other thread in that process. RETURN VALUES
Upon successful completion, the chdir() function returns a value of 0 (zero). Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS
If the chdir() function fails, the current directory remains unchanged and errno may be set to one of the following values: Search access is denied for any component of the pathname. The path parameter points outside the process's allocated address space. An I/O error occurred while reading from or writing to the file system. Too many symbolic links were encountered in translating the pathname. The length of the path argument exceeds PATH_MAX or a pathname component is longer than NAME_MAX. Pathname resolution of a symbolic link produced an intermediate result whose length exceeds PATH_MAX. The named directory does not exist, or is an empty string. A component of the path prefix is not a directory. If the fchdir() function fails, the current directory remains unchanged and errno may be set to one of the following values: The filedes parameter is not a valid open file descriptor. The file descriptor does not reference a directory. RELATED INFORMATION
Functions: chroot(2) Commands: cd(1) Standards: standards(5) delim off chdir(2)