For the last command executed by the current shell, $? has the exit status.
When there is a command pipe e.g,
it holds the last commands (awk in this case) status. In bash the $PIPESTATUS array holds the status of all the command issued, ie., date and awk
Dear All:
I want to build a shell that delete files created two or more days ago ... I think it could be built using a special command with ls or grep, I'd apreciate any help from you guys
I have a lot of log files from november, december, january and this tool will help me a lot
The files... (3 Replies)
I need to find files that have the ending of .out and that are older than 20 days. However, I cannot use find as I do not want to search in the directories that are underneath the directory that I am searching in.
How can this be done?? Find returns files that I do not want. (2 Replies)
Our nightly updates run in the evening and finish around 8am. My boss wants the current log files kept on the server for 2 days, but wants anything created before noon, 2 days prior archived. I was thinking of using touch to set a temporary file with a date of today-2 and a time of noon, then... (3 Replies)
Hi All,
Could you please let me know if there is any one can help to create a shell script to remove some files which is the created date for them greate than 10 days (sysdate-10)
Please try to email me on email removed
Thanks in advance,
Murad (1 Reply)
Hi,
I have an application which creates some directories while running. I want to delete these directories which are 4 days older.
i tried
find . type d -mtime +1 -print
And it is working fine..
but
find . type d -mtime +4 -print
is not giving any results which are 4 days... (6 Replies)
Hello
I have some directories and files created under /export/local/user
I would like to delete directories only under /export/local/user, created before 3 days
Can someone help me with command to do this task?
Thanks (4 Replies)
Hi,
I want to find the sum of all the files created 5 days ago and store it in a variable. (os is HP-UX)
can this be extracted from ls -l
Is there any other way of getting the sum of all the files created (4 Replies)
Discussion started by: bang_dba
4 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)