#include <signal.h>
#include "subcmd-util.h"
#include "sigchain.h"

#define SIGCHAIN_MAX_SIGNALS 32

struct sigchain_signal {
	sigchain_fun *old;
	int n;
	int alloc;
};
static struct sigchain_signal signals[SIGCHAIN_MAX_SIGNALS];

static void check_signum(int sig)
{
	if (sig < 1 || sig >= SIGCHAIN_MAX_SIGNALS)
		die("BUG: signal out of range: %d", sig);
}

static int sigchain_push(int sig, sigchain_fun f)
{
	struct sigchain_signal *s = signals + sig;
	check_signum(sig);

	ALLOC_GROW(s->old, s->n + 1, s->alloc);
	s->old[s->n] = signal(sig, f);
	if (s->old[s->n] == SIG_ERR)
		return -1;
	s->n++;
	return 0;
}

int sigchain_pop(int sig)
{
	struct sigchain_signal *s = signals + sig;
	check_signum(sig);
	if (s->n < 1)
		return 0;

	if (signal(sig, s->old[s->n - 1]) == SIG_ERR)
		return -1;
	s->n--;
	return 0;
}

void sigchain_push_common(sigchain_fun f)
{
	sigchain_push(SIGINT, f);
	sigchain_push(SIGHUP, f);
	sigchain_push(SIGTERM, f);
	sigchain_push(SIGQUIT, f);
	sigchain_push(SIGPIPE, f);
}
f7be0b726fec1a'/><select name='h' onchange='this.form.submit();'>
<option value='emaclite-cleanup'>emaclite-cleanup</option>
<option value='master' selected='selected'>master</option>
<option value='nds-private-remove'>nds-private-remove</option>
<option value='packet-loop-back'>packet-loop-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/misc/ldusb.c'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/misc/ldusb.c'>
<input type='hidden' name='id' value='c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>misc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>ldusb.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-02 13:20:23 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-02 13:20:23 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>c67b42f3a3f03e68bf915f32c8f7be0b726fec1a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>9abf8c8a276cd5e8119e5c50f53afc220648008e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>drivers/usb/misc/ldusb.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ldusb.c?id=027eb72cbcf81561867a764074964e2ce9828398'>027eb72cbcf81561867a764074964e2ce9828398</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a&amp;id2=027eb72cbcf81561867a764074964e2ce9828398'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ldusb.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/misc/ldusb.c?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a&amp;id2=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull EFI fixes from Ingo Molnar:
 "Two EFI boot fixes, one for arm64 and one for x86 systems with certain
  firmware versions"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/fdt: Avoid FDT manipulation after ExitBootServices()
  x86/efi: Always map the first physical page into the EFI pagetables
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>Diffstat</a> (limited to 'drivers/usb/misc/ldusb.c')</div><table summary='diffstat' class='diffstat'>