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5d718ef64b
The number of people has been steadily increasing who read our source
code with an editor that thinks tab stops are 4 spaces apart, as
opposed to the traditional tty-derived 8 that the PuTTY code expects.
So I've been wondering for ages about just fixing it, and switching to
a spaces-only policy throughout the code. And I recently found out
about 'git blame -w', which should make this change not too disruptive
for the purposes of source-control archaeology; so perhaps now is the
time.
While I'm at it, I've also taken the opportunity to remove all the
trailing spaces from source lines (on the basis that git dislikes
them, and is the only thing that seems to have a strong opinion one
way or the other).
Apologies to anyone downstream of this code who has complicated patch
sets to rebase past this change. I don't intend it to be needed again.
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "defs.h"
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/*
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* Calling signal() is non-portable, as it varies in meaning
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* between platforms and depending on feature macros, and has
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* stupid semantics at least some of the time.
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*
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* This function provides the same interface as the libc function,
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* but provides consistent semantics. It assumes POSIX semantics
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* for sigaction() (so you might need to do some more work if you
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* port to something ancient like SunOS 4)
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*/
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void (*putty_signal(int sig, void (*func)(int)))(int) {
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struct sigaction sa;
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struct sigaction old;
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sa.sa_handler = func;
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if(sigemptyset(&sa.sa_mask) < 0)
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return SIG_ERR;
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sa.sa_flags = SA_RESTART;
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if(sigaction(sig, &sa, &old) < 0)
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return SIG_ERR;
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return old.sa_handler;
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}
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void block_signal(int sig, bool block_it)
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{
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sigset_t ss;
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sigemptyset(&ss);
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sigaddset(&ss, sig);
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if(sigprocmask(block_it ? SIG_BLOCK : SIG_UNBLOCK, &ss, 0) < 0) {
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perror("sigprocmask");
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exit(1);
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}
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}
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/*
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Local Variables:
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c-basic-offset:4
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comment-column:40
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End:
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*/
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