01-26-2010
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello
I want to make simple extension to vi , you know how you want to run some shell command
you do ":! ls -l " , then you go out the vi the command executed and then you hit enter and you back to vi
but now I want to be able to go out of vi and run several command outside of vi .. and in... (3 Replies)
Discussion started by: umen
3 Replies
2. Programming
Hi,
I have a database (a simple .dat file) which has multiple records (structure datatype) in it.
I would like to know if we can use write() system call to update/modify intermediate records in this file (using C). If so, could somegive give a code snippet of the same. :-)
Thanks in advance... (2 Replies)
Discussion started by: maverix
2 Replies
3. Shell Programming and Scripting
Hi,
I need to do frequently server down and up. Every time i am using nearly 5 to 6 commands to down and agin i am using the commands to up.
Can anybody help me to write a script to down and up.
which i can use once on unix platform it can down later it can up the server. (1 Reply)
Discussion started by: sreerao
1 Replies
4. Shell Programming and Scripting
Execute some commands in script and store result in excel sheet
Kindly help me........... (1 Reply)
Discussion started by: Computer_baby
1 Replies
5. Red Hat
I am using Fedora 8,Red hat 9.
Whenever we write a new command. Then we goto "/usr/bin" and then place this in this directory.And hence we can use it as a command anywhere from the terminal.
We generally see commands like "trap" which run only in bash shell.We also have other shell specific... (1 Reply)
Discussion started by: nsharath
1 Replies
6. Fedora
hi friends
i am using fedora linux operating system on the server and two clients(with windows os) are connected to it(server ).but here wall and write cmds are not working to send messages from one system to another system .
pls help me (4 Replies)
Discussion started by: sankar_vitam
4 Replies
7. UNIX for Dummies Questions & Answers
I have to
Write a program in C that recognizes the following commands and translates them into much simpler ones
Commands to recognize shorter command
list L
cd dir C - dir_length - dir
get file_name G - file_name_length - file_name
Long commands are read from the standard input and... (1 Reply)
Discussion started by: aintour
1 Replies
8. Homework & Coursework Questions
I have to
Write a program in C that recognizes the following commands and translates them into much simpler ones
Commands to recognize shorter command
list
L
cd dir
C - dir_length - dir
get file_name G - file_name_length - file_name
Long commands are read from the standard input... (1 Reply)
Discussion started by: aintour
1 Replies
9. Shell Programming and Scripting
I want to create a script with the php exec() or system() function to execute commands from a remote browser on the webserver. I am open to using Perl or whatever. I am using an Apache2 webserver on Ubuntu.
I have done quite a bit of research on this on google and read lots of responses about... (0 Replies)
Discussion started by: bash_in_my_head
0 Replies
10. Shell Programming and Scripting
can any one suggest me on how to write a update query in perl script for Oracle database and also tell me abt how we can write a code for sending mails with report as attachment to appropriate persons? (1 Reply)
Discussion started by: Ramesh V Kumar
1 Replies
LEARN ABOUT CENTOS
sigorset
SIGSETOPS(3) Linux Programmer's Manual SIGSETOPS(3)
NAME
sigemptyset, sigfillset, sigaddset, sigdelset, sigismember - POSIX signal set operations.
SYNOPSIS
#include <signal.h>
int sigemptyset(sigset_t *set);
int sigfillset(sigset_t *set);
int sigaddset(sigset_t *set, int signum);
int sigdelset(sigset_t *set, int signum);
int sigismember(const sigset_t *set, int signum);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
sigemptyset(), sigfillset(), sigaddset(), sigdelset(), sigismember():
_POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
DESCRIPTION
These functions allow the manipulation of POSIX signal sets.
sigemptyset() initializes the signal set given by set to empty, with all signals excluded from the set.
sigfillset() initializes set to full, including all signals.
sigaddset() and sigdelset() add and delete respectively signal signum from set.
sigismember() tests whether signum is a member of set.
Objects of type sigset_t must be initialized by a call to either sigemptyset() or sigfillset() before being passed to the functions
sigaddset(), sigdelset() and sigismember() or the additional glibc functions described below (sigisemptyset(), sigandset(), and sig-
orset()). The results are undefined if this is not done.
RETURN VALUE
sigemptyset(), sigfillset(), sigaddset(), and sigdelset() return 0 on success and -1 on error.
sigismember() returns 1 if signum is a member of set, 0 if signum is not a member, and -1 on error. On error, these functions set errno to
indicate the cause.
ERRORS
EINVAL sig is not a valid signal.
CONFORMING TO
POSIX.1-2001.
NOTES
Glibc notes
If the _GNU_SOURCE feature test macro is defined, then <signal.h> exposes three other functions for manipulating signal sets.
int sigisemptyset(sigset_t *set);
returns 1 if set contains no signals, and 0 otherwise.
int sigorset(sigset_t *dest, sigset_t *left, sigset_t *right);
places the union of the sets left and right in dest.
int sigandset(sigset_t *dest, sigset_t *left, sigset_t *right);
places the intersection of the sets left and right in dest.
sigorset() and sigandset() return 0 on success, and -1 on failure.
These functions are nonstandard (a few other systems provide similar functions) and their use should be avoided in portable applications.
SEE ALSO
sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2)
COLOPHON
This page is part of release 3.53 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/.
Linux 2013-04-19 SIGSETOPS(3)