looks like while loop is much efficient in this case. im actually learning awk so im figuring out how to do this via awk but i guess i should stick to while loop in this case then. thanks
---------- Post updated at 06:29 PM ---------- Previous update was at 06:20 PM ----------
The tab delimiter was ignored, it opted to use space delimiter instead via while loop
Hello,
I have written some scripts that query the user and waits for keyboard input for an answer. I was wondering if there is any generic code snippets out there that would allow me to run this as a GUI. I am thinking of a simple dialogue box that would display the question and have a text... (1 Reply)
Evening all. I'm having a terrible time with a script I've been working on for a few days now...
Say I have a text file named top10song.tm2, with the following in it:
kernkraft 400
Imagine
i kissed a girl
Thriller
animals
hallelujah
paint it black
psychosocial
Oi to the world... (14 Replies)
Hi. This is code snipped I have. I am trying to play with signals...
int main(int argc, char *argv) {
int i;
sigset_t s; //declare set of signals
sigfillset(&s); //initializes the signal set to include all of the defined signals
int j;
for ( i = 0 ; i < 70 ; i++){
j... (6 Replies)
Hi,
I have a file with the following structure.
XXXXX...........
YYYYY...........
.................
..................
ZZZZZZ......
qwerty_start..............
..................
.................
..................
querty_end................
.............................. (1 Reply)
Hi,
I have a file with the following structure.
XXXXX...........
YYYYY...........
.................
..................
ZZZZZZ......
qwerty_start..............
..................
.................
..................
querty_end................
.............................. (3 Replies)
After a memory upgrade all network interfaces are misconfigued. How do i resolve this issue. Below are some out puts.thanks.
ifconfig: plumb: SIOCLIFADDIF: eg000g0:2: no such interface
# ifconfig eg1000g0:2 plumb
ifconfig: plumb: SIOCLIFADDIF: eg1000g0:2: no such interface
# ifconfig... (2 Replies)
perl -e '@stat=stat("/etc/passwd");$now_string=localtime($stat);print $ARGV.":$now_string\n"' ./file_name
Please if anyone can describe it.
Thanks in advance (1 Reply)
Hello,
I am attaching a code snippet. Some of the variables are set in earlier code like count, arrays harr1, harr2, barr1 and barr2. The code below gives syntax errors. I am very new to Bash.
for (( i=0; i<=$(( $count -1 )); i++ ))
do
#Now read the element at barr2 location i. Also find... (2 Replies)
Discussion started by: ngabrani
2 Replies
LEARN ABOUT POSIX
sem_wait
SEM_WAIT(3P) POSIX Programmer's Manual SEM_WAIT(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME
sem_wait -- lock a semaphore
SYNOPSIS
#include <semaphore.h>
int sem_wait(sem_t *sem);
DESCRIPTION
Refer to sem_trywait().
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE /The Open Group 2013 SEM_WAIT(3P)
08-07-2013
