01-30-2013
Quote:
Originally Posted by
Don Cragun
I am not aware of any other systems other than later AT&T releases of UNIX System V and SunOS/Solaris systems that provided the ability to use the set-GID bit on a directory to allow the user to choose the desired behavior, but it is certainly possible that some others do.
I can confirm that AIX is doing it the same way (and always has, AFAIK).
bakunin
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LEARN ABOUT DEBIAN
ssignal
GSIGNAL(3) Linux Programmer's Manual GSIGNAL(3)
NAME
gsignal, ssignal - software signal facility
SYNOPSIS
#include <signal.h>
typedef void (*sighandler_t)(int);
int gsignal(int signum);
sighandler_t ssignal(int signum, sighandler_t action);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
gsignal(), ssignal(): _SVID_SOURCE
DESCRIPTION
Don't use these functions under Linux. Due to a historical mistake, under Linux these functions are aliases for raise(3) and signal(2),
respectively.
Elsewhere, on System V-like systems, these functions implement software signaling, entirely independent of the classical signal(2) and
kill(2) functions. The function ssignal() defines the action to take when the software signal with number signum is raised using the func-
tion gsignal(), and returns the previous such action or SIG_DFL. The function gsignal() does the following: if no action (or the action
SIG_DFL) was specified for signum, then it does nothing and returns 0. If the action SIG_IGN was specified for signum, then it does noth-
ing and returns 1. Otherwise, it resets the action to SIG_DFL and calls the action function with argument signum, and returns the value
returned by that function. The range of possible values signum varies (often 1-15 or 1-17).
CONFORMING TO
These functions are available under AIX, DG/UX, HP-UX, SCO, Solaris, Tru64. They are called obsolete under most of these systems, and are
broken under Linux libc and glibc. Some systems also have gsignal_r() and ssignal_r().
SEE ALSO
kill(2), signal(2), raise(3)
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/.
2007-07-26 GSIGNAL(3)