Sponsored Content
Top Forums UNIX for Advanced & Expert Users Help with command substitution in C program Post 302463862 by royalbull on Monday 18th of October 2010 03:45:41 PM
Old 10-18-2010
Thank you guys .. its clear now ... thanks corona for the "dirty little" function it gave an template to work upon . mcnamara thanks for the cute little code emphasizing the entire point quite shortly .
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Substitution of last command

"Is there any substituation of last command or script syntax which can be used as a user. As far I know the "last" command is being used to display information about previous logins. A member of adm group or the user adm can execute it only. Thanks in advance for your usual help. Ghazi (6 Replies)
Discussion started by: ghazi
6 Replies

2. UNIX for Dummies Questions & Answers

Script to open program and send/execute command in program

Hi, i want to write a script that executes a program (exec?) . this program then requires a filename as input. how do i give it this input in the script so the program will be complete run and close by the script. e.g. exec prog.exe program then asks for filename "enter filename:"... (1 Reply)
Discussion started by: tuathan
1 Replies

3. Shell Programming and Scripting

Difference between "Command substitution" and "Process substitution"

Hi, What is the actual difference between these two? Why the following code works for process substitution and fails for command substitution? while IFS= read -r line; do echo $line; done < <(cat file)executes successfully and display the contents of the file But, while IFS='\n' read -r... (3 Replies)
Discussion started by: royalibrahim
3 Replies

4. Shell Programming and Scripting

Can process substitution be used as an input file to another program?

Hey, I was trying to figure out how to launch a program from the command line, and it works if you pass it a config file. I was thinking about writing a script to dynamically create the config file and pass it to the command using something like command substitution (so I don't actually have to... (3 Replies)
Discussion started by: bj0
3 Replies

5. UNIX for Dummies Questions & Answers

sed insert command and variable expansion/command substitution

I know this script is crummy, but I was just messing around.. how do I get sed's insert command to allow variable expansion to show the filename? #!/bin/bash filename=`echo $0` /usr/bin/sed '/#include/ { i\ the filename is `$filename` }' $1 exit 0 (8 Replies)
Discussion started by: glev2005
8 Replies

6. UNIX for Dummies Questions & Answers

read command - using output from command substitution

Hey, guys! Trying to research this is such a pain since the read command itself is a common word. Try searching "unix OR linux read command examples" or using the command substitution keyword. :eek: So, I wanted to use a command statement similar to the following. This is kinda taken... (2 Replies)
Discussion started by: ProGrammar
2 Replies

7. Shell Programming and Scripting

command substitution doubt

Hi, I almost always use back quotes in scripts to assigin output of a command to a variable. eg: file=`basename a/b/c/d/file` year_mon=`date +%Y%m` But the same can be achieved like: file=$(basename a/b/c/d/file) year_mon=$(date +%Y%m) I would like to know if there is... (3 Replies)
Discussion started by: wanderingmind16
3 Replies

8. Shell Programming and Scripting

Substitution within string command

I have the following code: strfuture=abcdefghi ver=${strfuture:${count}:1} mj7777_ver=${ver} start_mj7777_iteration let count=count+1 When it is executed I get bad substitution. The same if I use ver=${strfuture:$count:1} mj7777_ver=${ver}... (6 Replies)
Discussion started by: Bruble
6 Replies

9. Shell Programming and Scripting

Regarding command substitution

Oracle Linux 5.6, 64-bit Given the following snippet wrkvar=`sqlplus -s / as sysdba <<EOF set echo off feedback off head off trimsp on select count(*) from v\$parameter where name in ('db_file_name_convert','log_file_name_convert') and value is not null; EOF` echo wrkvar=$wrkvarProduces... (2 Replies)
Discussion started by: edstevens
2 Replies

10. Shell Programming and Scripting

Command option substitution?

Hi folks, I totally dislike asking questions in forums but this one eats up to much of my time I need to spend on other topics. I have a shell-script in which I call a terminal. I want to invoke bash inside the terminal and print a message inside bash with aid of a here document. See... (7 Replies)
Discussion started by: bluntroller
7 Replies
std::hash< _Tp >(3cxx)													    std::hash< _Tp >(3cxx)

NAME
std::hash< _Tp > - SYNOPSIS
Inherits std::__hash_base< _Result, _Arg >. Public Types typedef _Arg argument_type typedef _Result result_type Public Member Functions size_t operator() (_Tp __val) const template<> size_t operator() (bool __val) const template<> size_t operator() (char __val) const template<> size_t operator() (signed char __val) const template<> size_t operator() (unsigned char __val) const template<> size_t operator() (wchar_t __val) const template<> size_t operator() (char16_t __val) const template<> size_t operator() (char32_t __val) const template<> size_t operator() (short __val) const template<> size_t operator() (int __val) const template<> size_t operator() (long __val) const template<> size_t operator() (long long __val) const template<> size_t operator() (unsigned short __val) const template<> size_t operator() (unsigned int __val) const template<> size_t operator() (unsigned long __val) const template<> size_t operator() (unsigned long long __val) const template<> size_t operator() (float __val) const template<> size_t operator() (double __val) const template<> size_t operator() (long double __val) const Detailed Description template<typename _Tp>struct std::hash< _Tp > Primary class template hash. Definition at line 58 of file functional_hash.h. Author Generated automatically by Doxygen for libstdc++ from the source code. libstdc++ Tue Nov 27 2012 std::hash< _Tp >(3cxx)
All times are GMT -4. The time now is 06:00 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy