HI im a novice with shell scripts but i need help with a random script I have this folder filled with 500 different file names... I need help creating a script that will take each filename and make a new folder named that filename and then move that file into the newly created folder. Then the... (1 Reply)
In shell Can I pass " to a program ? If not what is the work around ..?
Can I define * as a wild card charecter that will return all the values from
the files ..?
I am trying to create a tool that will return the values from a property file . This tool has to support all the wild card... (1 Reply)
Hi,
I have been working on Sun Solaris since a long time. Recently I got to work on RH Linux. My Linux version details are:
Linux 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
I have a simple command in my shell script:
export BKPTAG=`date... (3 Replies)
Hi all,
I am trying to make a Nodemanager work in RHEL 5
I got this script from 'oraclemiddleware.wordpress.com', and made appropriate changes to suit my weblogic installation.
I keep getting the error, "line 82: syntax error: unexpected end of file".
I have checked every line to make sure all... (4 Replies)
Hi Guys
I am new to Linux Shell Scripting . Can any one help me with this Task...files are attached for reference
Task 1: write a script to generate a large size report file MX0002_new.XML by using the template MX0001_new.XML. Shell script is recomended, and it can run on Linux without... (2 Replies)
Taking a class and having trouble with this whole section.
1. What is the name of the action the shell performs on your command-line after you hit the ENTER key (i.e., to cut your command-line syntax into its constituent tokens, including its commands, options and arguments)?
Hint: It is a... (1 Reply)
we need help with the syntax with this shell script,
if you could create this shell script we can donate to a charity etc.
we need to set up a directory called user3
inside directory user3 we need to create the following files :
afile, anyfile, anotherfile, afiletest, bfile. bfiletest, cfile,... (3 Replies)
I have a csv file that looks like this
Name,Food,Sport
James,Curry,Gym
Darren,Pizza,Football
Jim,Fish,Hockey
James,Sushi,Tennis
My code looks like this
IFS=","
sed 1d $file_name | while read Name Food Sport
do
mkdir -p $Name
#echo "=================="
#echo "Name: $Name" (3 Replies)
Discussion started by: darklord173
3 Replies
LEARN ABOUT LINUX
system
SYSTEM(3) Linux Programmer's Manual SYSTEM(3)NAME
system - execute a shell command
SYNOPSIS
#include <stdlib.h>
int system(const char *command);
DESCRIPTION
system() executes a command specified in command by calling /bin/sh -c command, and returns after the command has been completed. During
execution of the command, SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored.
RETURN VALUE
The value returned is -1 on error (e.g. fork(2) failed), and the return status of the command otherwise. This latter return status is in
the format specified in wait(2). Thus, the exit code of the command will be WEXITSTATUS(status). In case /bin/sh could not be executed,
the exit status will be that of a command that does exit(127).
If the value of command is NULL, system() returns nonzero if the shell is available, and zero if not.
system() does not affect the wait status of any other children.
CONFORMING TO
C89, C99, POSIX.1-2001.
NOTES
If the _XOPEN_SOURCE feature test macro is defined (before including any header files), then the macros described in wait(2) (WEXITSTA-
TUS(), etc.) are made available when including <stdlib.h>.
As mentioned, system() ignores SIGINT and SIGQUIT. This may make programs that call it from a loop uninterruptible, unless they take care
themselves to check the exit status of the child. E.g.
while (something) {
int ret = system("foo");
if (WIFSIGNALED(ret) &&
(WTERMSIG(ret) == SIGINT || WTERMSIG(ret) == SIGQUIT))
break;
}
Do not use system() from a program with set-user-ID or set-group-ID privileges, because strange values for some environment variables might
be used to subvert system integrity. Use the exec(3) family of functions instead, but not execlp(3) or execvp(3). system() will not, in
fact, work properly from programs with set-user-ID or set-group-ID privileges on systems on which /bin/sh is bash version 2, since bash 2
drops privileges on startup. (Debian uses a modified bash which does not do this when invoked as sh.)
In versions of glibc before 2.1.3, the check for the availability of /bin/sh was not actually performed if command was NULL; instead it was
always assumed to be available, and system() always returned 1 in this case. Since glibc 2.1.3, this check is performed because, even
though POSIX.1-2001 requires a conforming implementation to provide a shell, that shell may not be available or executable if the calling
program has previously called chroot(2) (which is not specified by POSIX.1-2001).
It is possible for the shell command to return 127, so that code is not a sure indication that the execve(2) call failed.
SEE ALSO sh(1), signal(2), wait(2), exec(3)COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2010-09-10 SYSTEM(3)