08-06-2009
Well, you can't cancel signals that way. How about blocking them instead? You can make a signal wait in a queue until you're ready to deal with it with sigprocmask.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
this is my script to make a choice between 4 :
clear
echo " choose a profile and enter a number"
echo
echo " 1- oraSTT "
echo
echo " 2- appSTT "
echo... (3 Replies)
Discussion started by: big123456
3 Replies
2. Solaris
Hi all,
make_lofs /.cdrom/<something>/<something> 1
what does this instruction mean?
Note:both the "something" are obviously different .
I would like to know what that 1 means, the rest of the instruction is clear!!
Thanks (6 Replies)
Discussion started by: wrapster
6 Replies
3. Shell Programming and Scripting
Hi,
I'd get fields like
unix_linux_form_yyyyddmmhhmi.file.txt
shell_programming_and_scripting.txt
so on...
and want them as below
unix_linux_form
shell_programming_and
I could remove everything after a '.' as below
echo $field | sed 's/\..*//'
but how to remove... (14 Replies)
Discussion started by: dips_ag
14 Replies
4. Shell Programming and Scripting
Dear shell experts,
I spent last few days porting ksh script from ksh88/SunOS to ksh93/Linux.
Basically, things are going well and I do not have too much troubles porting ks88 script to ksh93, but I stuck on one item. It's about sending and handling the signal.
I found two similar... (8 Replies)
Discussion started by: bzk
8 Replies
5. Shell Programming and Scripting
Hi all,
I'd like to search a file for the first occurence of the phrase "PLASTICS THAT EXPIRE" and then discard all the lines that came before it. Output the remainder to a new file. Operating system is hp-ux. I've searched for usual awk and sed one liners but can't find a solution.
Thank... (4 Replies)
Discussion started by: Scottie1954
4 Replies
6. Shell Programming and Scripting
I want to remove commands having no output. In below text file.
bash-3.2$ cat abc_do_it.txt
grpg10so>show trunk group all status
grpg11so>show trunk group all status
grpg12so>show trunk group all status
GCPKNYAIGT73IMO 1440 1345 0 0 94 0 0 INSERVICE 93% 0%... (4 Replies)
Discussion started by: Raza Ali
4 Replies
7. Shell Programming and Scripting
Pleas I want answer to this question? Pleas help me
A system administrator suspects that there is an attack on his machine; he needs to make a backup of the files to check when they have been modified. For this purpose he uses the "cp -r" instruction to copy the root directory. What is the... (1 Reply)
Discussion started by: tamer11007
1 Replies
8. Shell Programming and Scripting
Hi,
I'd like to do an operation on text with a format like this
this line shall be numbered
this line shall not be numbered
this line shall also be numbered
this line shall not not be numbered
And I want an output like this
1 this line shall be numbered
this line... (6 Replies)
Discussion started by: jeppe83
6 Replies
9. Shell Programming and Scripting
I have the file:
s3_T0(2) Pos "1" "2"
s1_T1(2) Pos "1" "2"
---
0 0
1 0
0 1
1 1
---
1 2 "tau0"
1 2 "h10"
I want to patternmatch on ---
and get only the third part i.e.
1 2 "tau0"
1 2 "h10"
I wanted to start simple but even something like (5 Replies)
Discussion started by: eagle_fly
5 Replies
10. UNIX for Dummies Questions & Answers
Hi guys !
I generated the power set of the set S={a,b,c} using crunch:
crunch 1 3 abc
and get the 39 possible subsets:
a
b
c
aa
ab
ac
ba
bb
bc
ca
cb
cc
… (2 Replies)
Discussion started by: beca123456
2 Replies
LEARN ABOUT DEBIAN
sigsuspend
SIGSUSPEND(2) Linux Programmer's Manual SIGSUSPEND(2)
NAME
sigsuspend - wait for a signal
SYNOPSIS
#include <signal.h>
int sigsuspend(const sigset_t *mask);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
sigsuspend(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
DESCRIPTION
sigsuspend() temporarily replaces the signal mask of the calling process with the mask given by mask and then suspends the process until
delivery of a signal whose action is to invoke a signal handler or to terminate a process.
If the signal terminates the process, then sigsuspend() does not return. If the signal is caught, then sigsuspend() returns after the sig-
nal handler returns, and the signal mask is restored to the state before the call to sigsuspend().
It is not possible to block SIGKILL or SIGSTOP; specifying these signals in mask, has no effect on the process's signal mask.
RETURN VALUE
sigsuspend() always returns -1, normally with the error EINTR.
ERRORS
EFAULT mask points to memory which is not a valid part of the process address space.
EINTR The call was interrupted by a signal.
CONFORMING TO
POSIX.1-2001.
NOTES
Normally, sigsuspend() is used in conjunction with sigprocmask(2) in order to prevent delivery of a signal during the execution of a criti-
cal code section. The caller first blocks the signals with sigprocmask(2). When the critical code has completed, the caller then waits
for the signals by calling sigsuspend() with the signal mask that was returned by sigprocmask(2) (in the oldset argument).
See sigsetops(3) for details on manipulating signal sets.
SEE ALSO
kill(2), pause(2), sigaction(2), signal(2), sigprocmask(2), sigwaitinfo(2), sigsetops(3), sigwait(3), signal(7)
COLOPHON
This page is part of release 3.44 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 2008-08-29 SIGSUSPEND(2)