04-07-2009
Can you redirect stderr to a separate error.log file?
bash creates an array ${PIPESTATUS[*]} that is the exit status of each of the commands in a series of pipes. You can also use that if you are using bash.
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hey guys, need some help. Running AIX Version 5.2 and one of our cron jobs is writing errors to a log file. Any ideas on the following error message.
Error: Internal system error: Unable to initialize standard output file
I'm guessing more info might be needed, so let me know.
Thanks (2 Replies)
Discussion started by: firkus
2 Replies
2. Shell Programming and Scripting
I have a line in my script which reads as
exec >> $LOG 2>&1
However I am required to get input from the user somewhere in between as follows.
read var?"Enter a value:" < /dev/tty
The execution of the script puts the prompt of the read command to the log file rather than the console,... (4 Replies)
Discussion started by: jerardfjay
4 Replies
3. UNIX for Dummies Questions & Answers
hi there
i write one awk script file in shell programing
the code is related to dd/mm/yy to month, day year format
but i get an error
please can anybody help me out in this problem ??????
i give my code here including error
awk `
# date-month -- convert mm/dd/yy to month day,... (2 Replies)
Discussion started by: Herry
2 Replies
4. AIX
--------------------------------------------------------------------------------
Hello, help me please.
I am trying to create a mksysb bakup using nim. I am geting this error, how to correct it ? :
Command : failed stdout: yes stderr: no... (9 Replies)
Discussion started by: astjen
9 Replies
5. UNIX for Dummies Questions & Answers
im kinda new to shell scripting so i need some help
i try to run this script and get the error code
> 5 ")syntax error: operand expected (error token is "
the code for the script is
#!/bin/sh
#
# script to see if the given value is correct
#
# Define errors
ER_AF=86 # Var is... (4 Replies)
Discussion started by: metal005
4 Replies
6. Shell Programming and Scripting
When i try to run script in Linux, i get an error:
./MoveToHistory_ROAMING.sh: too many redirections
What is the reason?
Thank you.
Please use code tags! (3 Replies)
Discussion started by: annar
3 Replies
7. Solaris
I have two servers with a fresh install of Solaris 11, and having problems when doing rpcinfo between them. There is no firewall involved, so everything should theoretically be getting through. Does anyone have any ideas? I did a lot of Google searches, and haven't found a working solution yet.
... (2 Replies)
Discussion started by: christr
2 Replies
8. Solaris
Hello,
I've installed solaris audit on a Solaris 10 SPARC system.
Latest patch 143962-04 is installed.
My problem is that while I can catch all arguments and processes created, I cannot catch a redirection. ie
cat /tmp/test.txt > /tmp/test2.txtCatches the first part but not the redirection.... (5 Replies)
Discussion started by: gowron
5 Replies
9. UNIX for Beginners Questions & Answers
I am writing a shell script with 2 run time arguments. During the execution if i got any error, then it needs to redirected to a error file and in console. Also both error and output to be redirected to a log file. But i am facing the below error.
#! /bin/sh
errExit ()
{
errMsg=`cat... (1 Reply)
Discussion started by: sarathy_a35
1 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)