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gsignal (3)
  • gsignal (3) ( Русские man: Библиотечные вызовы )
  • >> gsignal (3) ( Linux man: Библиотечные вызовы )
  • gsignal (9) ( FreeBSD man: Ядро )
  •  

    NAME

    gsignal, ssignal - software signal facility
     
    

    SYNOPSIS

    #include <signal.h>
    
    typedef void (*sighandler_t)(int);
    
    int gsignal(intsignum);
    
    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 function 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 nothing 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 3.14 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/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    CONFORMING TO
    SEE ALSO
    COLOPHON


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