9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
I have a source file with data
Name ~ Groups
Muni~abc,was,USA_ax,123
Chaitanya~USA_12,was
Balaji~123,xyz,was
Ramu~123,xyz
From the second column i want to extract only the groups that matches the pattern 'USA_%' or if the group = 'was', and ignore any other columns.
... (8 Replies)
Discussion started by: morbid_angel
8 Replies
2. Shell Programming and Scripting
Hi all,
I have little working knowledge in unix shell scripting. I have a requirement where i need to pull out some data in between the strings in the file.
Input:
TEST
a
a
c
f
d
TEST
f
e
g
g
TEST
Output: (7 Replies)
Discussion started by: satyasrin82
7 Replies
3. Programming
Hi everyone
I am developing an utility.
At some part of it I read directory entries to a dynamic array: struct list
It stores pointers to items: list.entries,
which are structures: struct entry
If a number of files in a directory is greater then number of elements an array was initially... (11 Replies)
Discussion started by: torbium
11 Replies
4. SuSE
Dear Experts,
i am trying to find whether the given name is file or a directory
dirp = opendir(dirname);
direntp = readdir(dirp);
if(direntp->d_type & DT_DIR)
{
printf("\n is a dirctory");
}
else
{
//dir_or_file = Mtrue;
printf("\n not a directory");
}
it always... (9 Replies)
Discussion started by: vin_pll
9 Replies
5. Shell Programming and Scripting
Quick question.
I can not get the context corrert on this code.
opendir(DIR, ".");
@fileldiv = grep(/l*/,readdir(DIR));
closedir(DIR);
I am trying to search all html files within a dir that start with l.
Thanks for your help. (1 Reply)
Discussion started by: mrlayance
1 Replies
6. Shell Programming and Scripting
I am trying to script and came up with a conclusion that I need a do while loop in my statement. I am stuck with the
do while syntax. I need to use it alongwith the if then else statement. Can I use it is a big question? I actually need to get all the files
that are there from within run_dt to... (1 Reply)
Discussion started by: aronmelon
1 Replies
7. Programming
I am having a hard time doing this and can't seem to find an example to help me. This is my code:
DIR *dirp=opendir(pathname);
struct stat filebuf;
struct dirent entry;
struct dirent *dp=&entry;
RWCString pattern;
for (int i = 0; i < request_->getNumStreams(); i++)
{
... (2 Replies)
Discussion started by: ajgwin
2 Replies
8. UNIX for Dummies Questions & Answers
I read the description of the command readdir by using 'man readdir'. However, in the description i was suggesed to refer to readdir(3).
I wonder how to see the manual of readdir(3)
Thanks (1 Reply)
Discussion started by: cy163
1 Replies
9. Filesystems, Disks and Memory
I am trying to read the directory contents throgh the readdir system call.
After getting the directory entry I am testing the type of it by using the folllowing macros S_ISDIR() S_ISREG() etc. But in some systems every file in the directory is displaying like a sub directory. and in some systems... (2 Replies)
Discussion started by: gandhevinod
2 Replies
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