10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
The file f1 contains the text "body" (shell prompt is "$"):
$ cat ~/path/f1
body
How to print contents of f1 when the f1 path is in a variable?
Here is my failed attempt:
$ f1="~/path/f1"
$ echo $f1
~/path/f1
$ cat $f1
cat: '~/path/f1': No such file or directory (2 Replies)
Discussion started by: wolfv
2 Replies
2. Linux
Hi
I have a requirement like this:
/abc/a/x.txt
/abc/a/y.txt
/abc/b/x.gz
/abc/b/y.txt
I need output like this:
/abc/a:*.txt
/abc/b:*.txt
/abc/b:*.gz
I have tried find /abc -type f -name "*.*" ||awk -F . '{print $NF}' it is print only extensions without path name.
Please... (5 Replies)
Discussion started by: lijjumathew
5 Replies
3. Shell Programming and Scripting
Hello,
I have to fish out some specific columns from a file based on the header value. I have the list of columns I need in a different file. I thought I could read in the list of headers I need,
# file with header names of required columns in required order
headers_file=$2
# read contents... (11 Replies)
Discussion started by: LMHmedchem
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4. Shell Programming and Scripting
Hi All,
Sorrry by basic question but I have many files text plane e.g.
$ls
file1 file2 file3 ..
etc.,
$cat file1
123
244
345
NNN
4234
QQQ
423534
How can read contain each file and find pattern NNN and print in new file output, (2 Replies)
Discussion started by: aav1307
2 Replies
5. Shell Programming and Scripting
Hi,
I have two input files; file1 and file2. I compare them based on matched values in 1 column and print selected columns of the second file (file2). I got the result but the header was not printed. i want the header of file2 to be printed together with the result. Then i did below codes:-
... (3 Replies)
Discussion started by: redse171
3 Replies
6. Shell Programming and Scripting
hi,
i have a directory at /path/unix with the following files
1.txt
2.txt
3.txt
4.txt
I want to make another file called filenames.txt at a different location called /path/home. So, my output file would be
/path/home/filenames.txt with contents
/path/unix/1.txt... (1 Reply)
Discussion started by: jacobs.smith
1 Replies
7. AIX
How to can find all locked files and release the locks in Unix?
We have an issue were an ftp job lands files under /home/loginid at 5:30 pm and at 6 pm we run a get file on the mvs mainframe machine ftp the file from the server to the mainframe. We get an error file is in use eventhu it is not !!... (4 Replies)
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8. Emergency UNIX and Linux Support
Guys I have a big issue that I need to get fixed ASAP however I can not seem to find a way to do it. We started to use zones with Solaris 10 at work and we moved a zone from a SIT box to a DEV box. Problem is the software we have installed is looking at a /lcl/sit/apps/ path and it needs to look... (5 Replies)
Discussion started by: LRoberts
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9. Shell Programming and Scripting
Hi all
i need your help .. I am having a multiple file in directory and i have find out the Rcopy word from these files and need to print those files which contains the Rcopy word
Thanks and regards
Vijay sahu (2 Replies)
Discussion started by: vijays3
2 Replies
10. Shell Programming and Scripting
I'm trying to clean up my samba share and need to print the found file or print the path of the image it tried to searched for. So far I have this but can't seem to get the logic right. Can anyone help point me in the right direction?
for FILE in `cat list`; do
if ;
then
... (1 Reply)
Discussion started by: overkill
1 Replies
PTHREAD_MUTEXATTR(3) BSD Library Functions Manual PTHREAD_MUTEXATTR(3)
NAME
pthread_mutexattr_init, pthread_mutexattr_destroy, pthread_mutexattr_settype, pthread_mutexattr_gettype -- mutex attribute operations
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_mutexattr_init(pthread_mutexattr_t *attr);
int
pthread_mutexattr_destroy(pthread_mutexattr_t *attr);
int
pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type);
int
pthread_mutexattr_gettype(pthread_mutexattr_t * restrict attr, int * restrict type);
DESCRIPTION
Mutex attributes are used to specify parameters to pthread_mutex_init(). Like with thread attributes, one attribute object can be used in
multiple calls to pthread_mutex_init(3), with or without modifications between calls.
The pthread_mutexattr_init() function initializes attr with all the default mutex attributes.
The pthread_mutexattr_destroy() function destroys attr.
The pthread_mutexattr_settype() functions set the mutex type value of the attribute. Valid mutex types are:
PTHREAD_MUTEX_NORMAL
This type of mutex does not check for usage errors. It will deadlock if reentered, and result in undefined behavior if a locked mutex
is unlocked by another thread. Attempts to unlock an already unlocked PTHREAD_MUTEX_NORMAL mutex will result in undefined behavior.
PTHREAD_MUTEX_ERRORCHECK
These mutexes do check for usage errors. If an attempt is made to relock a PTHREAD_MUTEX_ERRORCHECK mutex without first dropping the
lock, an error will be returned. If a thread attempts to unlock a PTHREAD_MUTEX_ERRORCHECK mutex that is locked by another thread, an
error will be returned. If a thread attempts to unlock a PTHREAD_MUTEX_ERRORCHECK thread that is unlocked, an error will be returned.
PTHREAD_MUTEX_RECURSIVE
These mutexes allow recursive locking. An attempt to relock a PTHREAD_MUTEX_RECURSIVE mutex that is already locked by the same thread
succeeds. An equivalent number of pthread_mutex_unlock(3) calls are needed before the mutex will wake another thread waiting on this
lock. If a thread attempts to unlock a PTHREAD_MUTEX_RECURSIVE mutex that is locked by another thread, an error will be returned. If
a thread attempts to unlock a PTHREAD_MUTEX_RECURSIVE thread that is unlocked, an error will be returned.
It is advised that PTHREAD_MUTEX_RECURSIVE mutexes are not used with condition variables. This is because of the implicit unlocking
done by pthread_cond_wait(3) and pthread_cond_timedwait(3).
PTHREAD_MUTEX_DEFAULT
Also this type of mutex will cause undefined behavior if reentered. Unlocking a PTHREAD_MUTEX_DEFAULT mutex locked by another thread
will result in undefined behavior. Attempts to unlock an already unlocked PTHREAD_MUTEX_DEFAULT mutex will result in undefined behav-
ior.
This is the default mutex type for pthread_mutexaddr_init().
The pthread_mutexattr_gettype() functions copy the type value of the attribute to the location pointed to by the second parameter.
RETURN VALUES
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.
ERRORS
The pthread_mutexattr_init() function shall fail if:
[ENOMEM] Insufficient memory exists to initialize the mutex attributes object.
The pthread_mutexattr_settype() function shall fail if:
[EINVAL] The value specified either by type or attr is invalid.
No error numbers are defined for the pthread_mutexattr_destroy() and pthread_mutexattr_gettype() functions.
SEE ALSO
pthread_mutex_init(3)
STANDARDS
These functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD
July 9, 2010 BSD