Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to get system() function executed cmd return value ?
Top Forums Programming How to get system() function executed cmd return value ? Post 302093251 by blowtorch on Wednesday 18th of October 2006 07:36:13 AM
Old 10-18-2006
The return value of the command is in the upper 8 bits of the return value. So you bitwise shift the return value by 8.
Code:
#include<stdio.h>

int main() {
        int ret;
        ret=system("mv x.dat y.dat");
        fprintf(stdout,"system ret:[%d]\n",ret>>8);
}

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

perl "system" cmd return values..

perl 5.6.1: when i try a "system" command(with if loops for $?), i get this: child exited with value 1 what is meant by this $? values and what does it meant if it returns 1?.. (0 Replies)
Discussion started by: sekar sundaram
0 Replies

2. Solaris

rsh commands not getting executed from Solaris 10 System to AIX System

Hi Friends, I am trying to execute rsh commands from Solaris 10 system to AIX system. When I give; Solaris10# rsh <hostname> ls -l , it gives me an error rshd : 0826-826 The host name for your address is not known At the same time, Solaris10# rsh <hostname> ---- gives me remote shell of... (25 Replies)
Discussion started by: jumadhiya
25 Replies

3. Shell Programming and Scripting

How to find pid of PS which executed by perl system function

hello All, I need to invoke by perl script some program/command and monitor it for 5 minutes . In case it still running for more then 5 min I need to send a signal which will stop it. I implemeted this as shown below by using eval & alarm and I'd like to know if there is a better way to... (1 Reply)
Discussion started by: Alalush
1 Replies

4. Shell Programming and Scripting

how to find status of last executed cmd in perl?

In shell we can find the status of last executed command by $? In perl what is the command to find the status of last executed command... Can any one please say??????????????? Thanks, Prabhu (1 Reply)
Discussion started by: prsampath
1 Replies

5. Shell Programming and Scripting

Return a value from called function to the calling function

I have two scripts. script1.sh looks -------------------------------- #!/bin/bash display() { echo "Welcome to Unix" } display ----------------------------- Script2.sh #!/bin/bash sh script1.sh //simply calling script1.sh ------------------------------ (1 Reply)
Discussion started by: mvictorvijayan
1 Replies

6. Shell Programming and Scripting

How to get the return code of subroutines executed as standalone as command line in Perl ?

How to do I get the return code of a subroutine in a perl module if invoke the subroutine as standalone, I have an module say TestExit.pm and in that i have a subroutine say myTest() which is returns 12, if i were to call the subroutine from command line like CASE:1 ( Without an explict... (2 Replies)
Discussion started by: ennstate
2 Replies

7. Shell Programming and Scripting

How to input the return value (1 or 0) ping cmd to a variable

Hi I would like to ask about my plan script I have this several workstation want to monitor and execute a command without logging it we use "rsh $host "<command>" i create csh script using foreach to loop my several workstation, my problem with the rsh command is if it encounter a... (3 Replies)
Discussion started by: jao_madn
3 Replies

8. Programming

How to step in one function after the function be executed in gdb?

In gdb, I can call one function with command "call", but how can I step in the function? I don't want to restart the program, but the function had been executed, gdb will execute next statement, and I don't know how to recall the function. (4 Replies)
Discussion started by: 915086731
4 Replies

9. Shell Programming and Scripting

Return: can only `return' from a function or sourced script

Not sure where the problem is. I can run the script without any issue using the following command. . /opt/app/scripts/cdc_migration.sh But it fails with the below error when I try it this way /opt/app/scripts/cdc_migration.sh /opt/app/scripts/cdc_migration.sh: line 65: return: can only... (1 Reply)
Discussion started by: svajhala
1 Replies

10. Shell Programming and Scripting

Function - Make your function return an exit status

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 CENTOS

trace-cmd

TRACE-CMD(1)															      TRACE-CMD(1)

NAME

       trace-cmd - interacts with Ftrace Linux kernel internal tracer

SYNOPSIS

       trace-cmd COMMAND [OPTIONS]

DESCRIPTION

       The trace-cmd(1) command interacts with the Ftrace tracer that is built inside the Linux kernel. It interfaces with the Ftrace specific
       files found in the debugfs file system under the tracing directory. A COMMAND must be specified to tell trace-cmd what to do.

COMMANDS

	   record  - record a live trace and write a trace.dat file to the
		     local disk or to the network.

	   report  - reads a trace.dat file and converts the binary data to a
		     ASCII text readable format.

	   hist    - show a histogram of the events.

	   options - list the plugin options that are available to *report*

	   start   - start the tracing without recording to a trace.dat file.

	   stop    - stop tracing (only disables recording, overhead of tracer
		     is still in effect)

	   extract - extract the data from the kernel buffer and create a trace.dat
		     file.

	   reset   - disables all tracing and gives back the system performance.
		     (clears all data from the kernel buffers)

	   split   - splits a trace.dat file into smaller files.

	   list    - list the available plugins or events that can be recorded.

	   listen  - open up a port to listen for remote tracing connections.

	   restore - restore the data files of a crashed run of trace-cmd record

	   stack   - run and display the stack tracer

	   check-events - parse format strings for all trace events and return
			  whether all formats are parseable

OPTIONS

       -h, --help
	   Display the help text.

       Other options see the man page for the corresponding command.

SEE ALSO

       trace-cmd-record(1), trace-cmd-report(1), trace-cmd-hist(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1),
       trace-cmd-reset(1), trace-cmd-restore(1), trace-cmd-stack(1), trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1), trace-cmd.dat(5),
       trace-cmd-check-events(1)

AUTHOR

       Written by Steven Rostedt, <rostedt@goodmis.org[1]>

RESOURCES

       git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git

COPYING

       Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).

NOTES

	1. rostedt@goodmis.org
	   mailto:rostedt@goodmis.org

								    06/11/2014							      TRACE-CMD(1)
All times are GMT -4. The time now is 07:53 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy