I am trying to replace the value of $f3 but its not working . I don't know what I am missing here .
cat dim_copy.20080516.sql | grep -i "create view" | grep -v OPSDM002 | while read f1 f2 f3 f4 f5 f6 f7 f8 f9
do
echo " $f3 "
sed -e... (13 Replies)
Is there a way to fix the width of the word being printed to a file? I am trying to create an output to a file with columns , like a spread sheet. I have used "\t" to adjust the columns but still it does not show well in the file, mainly due to the variable length values in the column so \t does... (1 Reply)
Hi Experts
I've problem in a my office server (solaris 10 - x86) version. x4600 M2 hardware
This system is getting rebooted because of zfs bug
I've applied patch using live upgrade with live new environment created and
applied the patch which oracle suggested(
144501-19), it asks for... (3 Replies)
1. The problem statement, all variables and given/known data:
I need help I get a variant of syntax errors when compiling my script to maintain a database. It's a simple database meant to create/view/maintain vehicles.
2. Relevant commands, code, scripts, algorithms:
my if statements have... (5 Replies)
Hi
I use Rapid 7 to check some servers ( AIX 5.3 ) for security problems. There are 2 problems I don't know to deal with
1.
Problem : TCP Sequence Number Approximation Vulnerability
Solution :
_Enable TCP MD5 Signature
2.
Problem : HTTP Basic Authentication Enable
Solution :
_ Use... (5 Replies)
Hey guys,
I am trying to make print a pattern with * on a 10*10 two dimensional array in a for loop and I want the incoming 10*10 to overlap the previous 10*10 so that the * look like it is moving. is there a way to fix the screen position?
ever time it prints a 10*10 the screen moves.
... (3 Replies)
can someone please help me spot and fix the issue with the following code:
awk -F, -v SEARCHPATT="(Wed|Tue)" -v ADDISTR="Mon|Tue|Wed|Thu|Fri|Sat|Sun" -vVF="$VALFOUND"
"BEGIN{ {D = D = 1
D = D = 2
}
$0 ~ "," VF "," {L = 1 ... (9 Replies)
Okay I want to try my luck at fixing bugs for the Fedora OS, but I guess this question deals with any Linux distro or any open source OS for that matter.
I want to know how I can start fixing bugs on the OS level. For example the particular bug that I want to target is this logout bug
I mean... (6 Replies)
Discussion started by: sreyan32
6 Replies
LEARN ABOUT DEBIAN
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 3.44 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)