02-10-2005
$- is used to show current shell options (in Bash, Korn and others)... These can be options passed during the shells invocation (i.e. when the shell is first started), or set whilst the shell is running with the "set" command. For example....
$ echo $-
himBH
$ set -x
$ echo $-
himxBH
$ set +x
$ echo $-
himBH
$ bash -r # start another shell with -r set
$ echo $-
himrBH
$ exit
$ echo $-
himBH
Read the manual page for the shell you're using and take a look at the "set" section and also the invocation options section.
I check the value of $- in my
.kshrc file to make sure that it is executed for interactive shells only.
Cheers
ZB
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LEARN ABOUT CENTOS
seccomp_release
seccomp_release(3) libseccomp Documentation seccomp_release(3)
NAME
seccomp_release - Release the seccomp filter state
SYNOPSIS
#include <seccomp.h>
typedef void * scmp_filter_ctx;
void seccomp_release(scmp_filter_ctx ctx);
Link with -lseccomp.
DESCRIPTION
Releases the seccomp filter in ctx which was first initialized by seccomp_init(3) or seccomp_reset(3) and frees any memory associated with
the given seccomp filter context. Any seccomp filters loaded into the kernel are not affected.
RETURN VALUE
Does not return a value.
EXAMPLES
#include <seccomp.h>
int main(int argc, char *argv[])
{
int rc;
scmp_filter_ctx ctx;
ctx = seccomp_init(SCMP_ACT_KILL);
if (ctx == NULL)
return -1;
/* ... */
seccomp_release(ctx);
return 0;
}
NOTES
While the seccomp filter can be generated independent of the kernel, kernel support is required to load and enforce the seccomp filter gen-
erated by libseccomp.
The libseccomp project site, with more information and the source code repository, can be found at http://libseccomp.sf.net. This library
is currently under development, please report any bugs at the project site or directly to the author.
AUTHOR
Paul Moore <paul@paul-moore.com>
SEE ALSO
seccomp_init(3), seccomp_reset(3)
paul@paul-moore.com 25 July 2012 seccomp_release(3)