I'm not sure I follow your question but you can use the above to to read through directories and thus select your file.
something like the following may suit or at least be hackable into something that suits
Of course I may have wildly misunderstood your spec and something like File::Find may be more suitable for your needs.
This User Gave Thanks to Skrynesaver For This Post:
Hey all,
I've been trying to learn Perl on my BSD box. When it came to printing the files out, it bothered me that the lines weren't numbered. So here's my little *crap* claim to some-form-of-fame Perl script which numbers files:
... (9 Replies)
Hi
I am having a file with 243 lines..
The file format s given below
eg
P25787 hsa03050 1 P20618 hsa03050 1
P25786 hsa03050 1 P49721 hsa03050 1
P54132 hsa03440 1 Q13472 hsa03470 1
Q05513 hsa04530 hsa04910 hsa04930 3 Q04759 ... (0 Replies)
I wish to write a Perl program that will provide a listing of files in a directory. The files must be listed in sorted order by the file name.
• By default, the program displays only file names.
• By default, the program lists the files in the current directory.
• The program must provide the... (2 Replies)
could i get any help with how to link this program together. i dont know what to put where the X's are
print `flush`;
thank(); #print thank header
use Getopt::Std; # use declaration with the options function
getopts("ld:") or usage() and exit; ... (3 Replies)
Long story short: I'm working inside of a Unix SSH under a bash shell. I have to code a C program that generates a random number. Then I have to call the compiled C program with a Perl program to run the C program 20 times and put all the generated random #s into a text file, then print that text... (1 Reply)
how would you exit out of a programm correctly, without having for the program to crash?
for example
print "Enter quit";
$input = <STDIN>;
if ($input eq "quit")
{
{QUIT THE PROGRAM}
}
else
{
print "invalid input";
}
one more thing, how do u exit a program "correctly", if... (3 Replies)
Hi
I am new to perl, i need to write a program to convert horizontal words to vertical
eg: cat, dog, cow,.....(text file)
this should be written as
1.cat
2.dog
like this. can u pls help me to work out.. (4 Replies)
hi,
i have posted the same kind of the question in some other forum of the same site. but realized that it is supposed to be here so i am reposting it .this is the perl script written to check for particular pattern.
my file 1 would look like this
hwk:678:9878:asd:09: abc cfgb 12 nmjk ......... (3 Replies)
can anyone help me out to write a code by connecting to the sql database and I need to print the list of tables present in the databse.
any ideas please. (1 Reply)
I created a program, so a kid can practice there math on it. It dispenses varies math problems and the kid must input an answer. I also want it to grade the work they have done, but I can't find the best place for it to print out the grade.
I have:
if ( $response =~ m/^/ ) {
$user_wants_to_quit... (1 Reply)
Discussion started by: germany1517
1 Replies
LEARN ABOUT BSD
readdir
DIRECTORY(3) Library Functions Manual DIRECTORY(3)NAME
opendir, readdir, telldir, seekdir, rewinddir, closedir - directory operations
SYNOPSIS
#include <sys/types.h>
#include <sys/dir.h>
DIR *opendir(filename)
char *filename;
struct direct *readdir(dirp)
DIR *dirp;
long telldir(dirp)
DIR *dirp;
seekdir(dirp, loc)
DIR *dirp;
long loc;
rewinddir(dirp)
DIR *dirp;
closedir(dirp)
DIR *dirp;
DESCRIPTION
Opendir opens the directory named by filename and associates a directory stream with it. Opendir returns a pointer to be used to identify
the directory stream in subsequent operations. The pointer NULL is returned if filename cannot be accessed, or if it cannot malloc(3)
enough memory to hold the whole thing.
Readdir returns a pointer to the next directory entry. It returns NULL upon reaching the end of the directory or detecting an invalid
seekdir operation.
Telldir returns the current location associated with the named directory stream.
Seekdir sets the position of the next readdir operation on the directory stream. The new position reverts to the one associated with the
directory stream when the telldir operation was performed. Values returned by telldir are good only for the lifetime of the DIR pointer
from which they are derived. If the directory is closed and then reopened, the telldir value may be invalidated due to undetected direc-
tory compaction. It is safe to use a previous telldir value immediately after a call to opendir and before any calls to readdir.
Rewinddir resets the position of the named directory stream to the beginning of the directory.
Closedir closes the named directory stream and frees the structure associated with the DIR pointer.
Sample code which searchs a directory for entry ``name'' is:
len = strlen(name);
dirp = opendir(".");
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
if (dp->d_namlen == len && !strcmp(dp->d_name, name)) {
closedir(dirp);
return FOUND;
}
closedir(dirp);
return NOT_FOUND;
SEE ALSO open(2), close(2), read(2), lseek(2), dir(5)4.2 Berkeley Distribution September 24, 1985 DIRECTORY(3)