Hi,
I have general question: i have good working Perl script with .pl extension, and now I have to migrate all to another Linux box, and I was told that I can use only shell scripting, so I'm not sure how different those two things are, will it work without any changes . Is there anything smart I can tell those Unix/Linux admins to convince them to use my old .pl.
I thought that Perl is kind of built in n each Unix/Linux box, another thing that this script will be fired by third party scheduler with currently works with with existing shell scripts, so maybe this can make difference.
Will appreciate any info, I'm knd of beginner.
Mario
My pl script pretty simple, something like below, do you think ksh will take it?
--------------------------------------
Last edited by pludi; 01-21-2010 at 04:00 AM..
Reason: code tags, please...
Anyone here knows any reasonably priced courses for independent (not corporate) users that can point me to. Already know Unix commands/vi/etc but now need scripting too. Any replies will be appreciated. (2 Replies)
Please Let me know this Que and Ans please Because i applied for a H1B VISA nad i have a INTERVIEW as soon so please "Difference between Linux and Unix and also C and C++ and also about Shell Scripting about all Questions and Answers ." (3 Replies)
I want to learn Linux/Unix shell scripting, I searched this forum but got some results for Unix Admin books and general Linux books.
Would someone recommend a good Linux Shell Scripting book?
I did order one book
A Practical Guide to Linux(R) Commands, Editors, and Shell Programming ... (4 Replies)
Hello,
I have done some BASIC shell scripting/PERL scripting before so I am familiar with the languages. I am not really sure which one would lend itself better to the application I have to write.
I am required to scan the message logs for possible break in attempts. If I use shell scripting... (3 Replies)
Hi
How to call a shell scripting through a Perl scripting? Actually I need some value from Shell scripting and passes in the Perl scripting. So how can i do this? (2 Replies)
Hi all,
I would like to start developping some good scripting skills. Do you think it would be best to start with shell scripting or Perl? I already got a fundation, really basics, in perl. but I am wondering what would be best to be good at first.
Can you please help me determine which one to... (14 Replies)
Gents,
I have been working in a Solaris/Unix environment for about 9 months. I took some linux classses online before getting the job. But, I am not very good at scripting. I want to learn how to script. Do you think that I should start with Shell scripting or Perl? I wanted to continue with... (2 Replies)
Hi ,
Could someone please help me for following script:
perl -pi -e 's/\"//g' ${FILELIKE}*.csv
perl -pi -e '$_ ="" if ($.==1);' ${FILELIKE}*.csv
What these 2 commands are doing?
Thanks,
Preetpal
How to use code tags (4 Replies)
Discussion started by: preetpalkapoor
4 Replies
LEARN ABOUT OSX
rewinddir
DIRECTORY(3) BSD Library Functions Manual DIRECTORY(3)NAME
closedir, dirfd, opendir, readdir, readdir_r, rewinddir, seekdir, telldir -- directory operations
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <dirent.h>
int
closedir(DIR *dirp);
int
dirfd(DIR *dirp);
DIR *
opendir(const char *dirname);
struct dirent *
readdir(DIR *dirp);
int
readdir_r(DIR *restrict dirp, struct dirent *restrict entry, struct dirent **restrict result);
void
rewinddir(DIR *dirp);
void
seekdir(DIR *dirp, long loc);
long
telldir(DIR *dirp);
DESCRIPTION
The opendir() function opens the directory named by dirname, associates a directory stream with it, and returns a pointer to be used to iden-
tify the directory stream in subsequent operations. The pointer NULL is returned if dirname cannot be accessed or if it cannot malloc(3)
enough memory to hold the whole thing.
The readdir() function returns a pointer to the next directory entry. It returns NULL upon reaching the end of the directory or detecting an
invalid seekdir() operation.
readdir_r() provides the same functionality as readdir(), but the caller must provide a directory entry buffer to store the results in. If
the read succeeds, result is pointed at the entry; upon reaching the end of the directory, result is set to NULL. readdir_r() returns 0 on
success or an error number to indicate failure.
The telldir() function returns the current location associated with the named directory stream. Values returned by telldir() are good only
for the lifetime of the DIR pointer (e.g., dirp) from which they are derived. If the directory is closed and then reopened, prior values
returned by telldir() will no longer be valid.
The seekdir() function sets the position of the next readdir() operation on the directory stream. The new position reverts to the one asso-
ciated with the directory stream when the telldir() operation was performed.
The rewinddir() function resets the position of the named directory stream to the beginning of the directory.
The closedir() function closes the named directory stream and frees the structure associated with the dirp pointer, returning 0 on success.
On failure, -1 is returned and the global variable errno is set to indicate the error.
The dirfd() function returns the integer file descriptor associated with the named directory stream, see open(2).
Sample code which searches a directory for entry ``name'' is:
len = strlen(name);
dirp = opendir(".");
while ((dp = readdir(dirp)) != NULL)
if (dp->d_namlen == len && !strcmp(dp->d_name, name)) {
(void)closedir(dirp);
return FOUND;
}
(void)closedir(dirp);
return NOT_FOUND;
LEGACY SYNOPSIS
#include <sys/types.h>
#include <dirent.h>
<sys/types.h> is necessary for these functions.
SEE ALSO close(2), lseek(2), open(2), read(2), compat(5), dir(5)HISTORY
The closedir(), dirfd(), opendir(), readdir(), rewinddir(), seekdir(), and telldir() functions appeared in 4.2BSD.
BSD June 4, 1993 BSD