rac@sherpa.UUCP (Roger Cornelius) (09/01/90)
I'm attempting to port a program which uses BSD job control for use with POSIX job control under system 5. Can someone explain to me what the BSD function sigsetmask() does. I would also like to know what the TIOCLGET and TIOCLSET ioctl() requests do. Are BSD manuals available to non-BSD sites, and if so, from where? Thanks. -- Roger A. Cornelius rac@sherpa.UUCP uunet!sherpa!rac
gt0178a@prism.gatech.EDU (BURNS,JIM) (09/02/90)
in article <323@sherpa.UUCP>, rac@sherpa.UUCP (Roger Cornelius) says: > Can someone explain to me what > the BSD function sigsetmask() does. NAME sigsetmask - set current signal mask SYNOPSIS sigsetmask(mask); int mask; DESCRIPTION Sigsetmask sets the current signal mask (those signals which are blocked from delivery). Signal i is blocked if the i-th bit in mask is a 1. The system quietly disallows SIGKILL, SIGSTOP, or SIGCONT to be blocked. RETURN VALUE The previous set of masked signals is returned. SEE ALSO kill(2), sigvec(2), sigblock(2), sigpause(2) In other words, sigsetmask(2) allows you to disallow delivery of signals in critical sections of code. Sigsetmask *sets* the signal mask. Similarly sigblock(2) *adds* to the current signal mask. Signal 1 maps to bit 0 (right most) and signal 32 (if you go that high - see 'kill -l') maps to bit 31 (left most). On systems w/16 bit ints, the parameter types would probably be defined differently. -- BURNS,JIM Georgia Institute of Technology, Box 30178, Atlanta Georgia, 30332 uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt0178a Internet: gt0178a@prism.gatech.edu
seindal@skinfaxe.diku.dk (Rene' Seindal) (09/03/90)
rac@sherpa.UUCP (Roger Cornelius) writes: > Are BSD manuals available to non-BSD sites, and if so, from where? USENIX and EUUG sells 4.3 manuals. Rene' Seindal (seindal@diku.dk)
decot@hpisod2.HP.COM (Dave Decot) (09/07/90)
> I'm attempting to port a program which uses BSD job control for use > with POSIX job control under system 5. Can someone explain to me what > the BSD function sigsetmask() does. I would also like to know what > the TIOCLGET and TIOCLSET ioctl() requests do. sigprocmask() is the POSIX equivalent of BSD's sigsetmask(), although the mask arguments must be constructed differently. TIOCLGET Get the process group control mode word and store it in the int referenced by arg. This command is allowed from a background process; however, the information may be subsequently changed by a foreground process. TIOCLSET Set the process group control mode word to the value of the int referenced by arg. TIOCLBIS Use the int referenced by arg as a mask of bits to set in the process group control mode word. TIOCLBIC Use the int referenced by arg as a mask of bits to clear in the process group control mode word. These are used to get, set, and clear flags such as TOSTOP (which controls whether a background process group receives a SIGTTOU signal when one of its process writes to its controlling terminal). Dave Decot HP