01-30-2020
i am not able to understand the trim_file function.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
how does below tr command replace nonletters with newlines?
I think I understand tr -cs '\n' part.. but what is
A-Za-z\' <--- what is this??
tr -cs A-Za-z\' '\n' |
-c --complement
-s, --squeeze-repeats
replace each input sequence of a repeated character that is... (0 Replies)
Discussion started by: convenientstore
0 Replies
2. Shell Programming and Scripting
how does below tr command replace nonletters with newlines?
I think I understand tr -cs '\n' part.. but what is
A-Za-z\' <--- what is this??
tr -cs A-Za-z\' '\n' |
-c --complement
-s, --squeeze-repeats
replace each input sequence of a repeated character that is... (1 Reply)
Discussion started by: convenientstore
1 Replies
3. UNIX and Linux Applications
Hi am having a c pgm. It has the include files (unistd.h,sys/types.h,win.h,scr.h,curses.h,stdarg.h and color.h). I don't know the purpose of these include files. will u plz explain me. (1 Reply)
Discussion started by: Mari.kb
1 Replies
4. Shell Programming and Scripting
Hi ,
I have three funcions f1, f2 and f3 .
f1 calls f2 and f2 calls f3 .
I have a global variable "period" which i want to pass to f3 .
Can i pass the variable directly in the definition of f3 ?
Pls help .
sars (4 Replies)
Discussion started by: sars
4 Replies
5. UNIX for Dummies Questions & Answers
Its great someone provided this script that strips out a filename and extension but can someone explain how each line works?
file1='Jane Mid Doe.txt'
newfile='Jane.txt'
1) ext=${file1##*.}
2) filename=${file%%.???}
3) set -- $filename
4) newfile="1.$extension" (1 Reply)
Discussion started by: Lillyt
1 Replies
6. Shell Programming and Scripting
I have found a code some where, which looks like
if (test $value)
then
<do something>
fi
I am not understanding what is test doing here. I have seen test with !,-eq, -e etc.
But, the above appears to be a new one to me.
Can anyone please expalin me. (4 Replies)
Discussion started by: mady135
4 Replies
7. UNIX for Dummies Questions & Answers
Hello Unix experts,
If I could get any explanations on why the code below doesn't work it would be great !
My input looks like that ("|" delimited):
Saaaaabbbbbccccc|ok
Sdddddfffffggggg|ok
The goal is, if $2 is "ok", to remove everything before the pattern given in the match function... (5 Replies)
Discussion started by: lucasvs
5 Replies
8. Shell Programming and Scripting
Hi,
I need more explination on it, how it works
abcd="$(echo "$abcd" | sed 's/ //g')" >> ${LOGFILE} 2>&1
can any one suggest me on this?
Rgds,
LKR (1 Reply)
Discussion started by: lakshmanraok
1 Replies
9. Shell Programming and Scripting
Dear All.
I have a script, which process files one by one. In the script I have two functions.
one sftp files to different server
the other from existing file create file with different name.
My question is:
Will sftp function recognize files names , which are created in another... (1 Reply)
Discussion started by: digioleg54
1 Replies
10. Shell Programming and Scripting
Hi All,
Good Day, seeking for your assistance on how to not perform my 2nd, 3rd,4th etc.. function if my 1st function is in else condition.
#Body
function1()
{
if
then
echo "exist"
else
echo "not exist"
}
#if not exist in function1 my all other function will not proceed.... (4 Replies)
Discussion started by: meister29
4 Replies
LEARN ABOUT DEBIAN
explain_getpgrp_or_die
explain_getpgrp_or_die(3) Library Functions Manual explain_getpgrp_or_die(3)
NAME
explain_getpgrp_or_die - get process group and report errors
SYNOPSIS
#include <libexplain/getpgrp.h>
pid_t explain_getpgrp_or_die(pid_t pid);
pid_t explain_getpgrp_on_error(pid_t pid);
DESCRIPTION
The explain_getpgrp_or_die function is used to call the getpgrp(2) system call. On failure an explanation will be printed to stderr,
obtained from the explain_getpgrp(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_getpgrp_on_error function is used to call the getpgrp(2) system call. On failure an explanation will be printed to stderr,
obtained from the explain_getpgrp(3) function, but still returns to the caller.
pid The pid, exactly as to be passed to the getpgrp(2) system call.
API Inconsistencies
Note: the getpgrp(2) function has two implementations. The POSIX.1 version has no arguments, while the BSD version has one argument. For
simplicity of implementation, the argument list seen here includes the pid argument.
The POSIX.1 getpgid() semanatics can be obtained by calling getpgrp(0) on BSD systems, and this is the API for libexplain, even on systems
that do not use the BSD API.
RETURN VALUE
The explain_getpgrp_or_die function only returns on success, see getpgrp(2) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_getpgrp_on_error function always returns the value return by the wrapped getpgrp(2) system call.
EXAMPLE
The explain_getpgrp_or_die function is intended to be used in a fashion similar to the following example:
pid_t result = explain_getpgrp_or_die(pid);
SEE ALSO
getpgrp(2)
get process group
explain_getpgrp(3)
explain getpgrp(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2011 Peter Miller
explain_getpgrp_or_die(3)