Hi - I am totally new to UNIX so please bear with me...
I run a java program on Win NT server to do file ftp to UNIX server.
I log in, cd, create ftp file on UNIX and quit from my java progam - all works well.
Now I want to execute a script on UNIX.
At the UNIX 'console'/'shell' (!?) you... (1 Reply)
Hi,
I am trying to export some 50 tables and i want to write a loop and execute the script for every table. I did for one table and its running. Can any one help me for setting a loop and running the script for all the tables
thanks (6 Replies)
I have created get_list.bat file containing following line:
dir /B /O-d >file_list.txt
I am executing ftp command from Unix box and transferring get_list.bat file to windows server.
In my next ftp command I am trying to execute this test.bat file by entering this line:
get_list
or by... (9 Replies)
Hi,
I need to execute the following unix command through my java code -
zip -e
When i execute this command from the command prompt, i am prompted for a password in the following manner -
Enter password:
Verify password:
Is it possible to provide the password inthe first command itself... (5 Replies)
Hi need urgent help , for creating unix script .
To collect system name,This is command i want to execute n (integer) no. of times for for a differnt IP addresses .IP is variable in every execution.
Other string & collecter name is constant .
snmpGet %IP% sysName.0 -c <string> -S <datacollecter... (2 Replies)
Hi,
I am trying tio invoke unix variable in a sed command like below, but it seems to be failing..
a=1
sed -n '$a,$p' file.txt ### Failing
but
a=1
sed -n '1,$p' files.txt ### Works fine
Please help me to fix this... Thanks in advance (2 Replies)
Hi:
I have a touble with executing a variable that stores a unix command string.
The following would be excuted fine:
command='ls -l'
`echo $command`
However, the following gives me an error:
command='(uuencode file1 file1; uuencode file2 file2) | mailx email_id'
`echo... (1 Reply)
Hi All,
I am trying to execute a set of sql statements in sql server 2008 using the sqlcmd command in unix and passing the query in the "input" parameter. It is giving me an error "incorrect syntax near 2014". The below statement is giving an error :
declare date_val datetime,
... (4 Replies)
Hello,
Our applications are deployed in SunOS 5.10 servers. All the team members use a same username/pwd to login to the box. Very often we face issue were we could see that weblogic server instance are KILLED and we are not able to trace who executed kill command. All team members use PUTTY to... (2 Replies)
Discussion started by: santtarius
2 Replies
LEARN ABOUT REDHAT
system
SYSTEM(3) Linux Programmer's Manual SYSTEM(3)NAME
system - execute a shell command
SYNOPSIS
#include <stdlib.h>
int system(const char *string);
DESCRIPTION
system() executes a command specified in string by calling /bin/sh -c string, 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 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 string 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
ANSI C, POSIX.2, BSD 4.3
NOTES
As mentioned, system() ignores SIGINT and SIGQUIT. This may make programs that call it from a loop uninterruptable, 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 suid or sgid 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 suid or sgid 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.)
The check for the availability of /bin/sh is not actually performed; it is always assumed to be available. ISO C specifies the check, but
POSIX.2 specifies that the return shall always be non-zero, since a system without the shell is not conforming, and it is this that is
implemented.
It is possible for the shell command to return 127, so that code is not a sure indication that the execve() call failed.
SEE ALSO sh(1), signal(2), wait(2), exec(3)
2001-09-23 SYSTEM(3)