NetBSD/sys/miscfs/procfs/procfs_note.c

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/*
* Copyright (c) 1993 The Regents of the University of California.
* Copyright (c) 1993 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* From:
* Id: procfs_note.c,v 4.1 1993/12/17 10:47:45 jsp Rel
*
* $Id: procfs_note.c,v 1.2 1994/01/20 21:23:06 ws Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <miscfs/procfs/procfs.h>
procfs_namemap_t procfs_signames[] = {
/* regular signal names */
{ "hup", SIGHUP }, { "int", SIGINT },
{ "quit", SIGQUIT }, { "ill", SIGILL },
{ "trap", SIGTRAP }, { "abrt", SIGABRT },
{ "iot", SIGIOT }, { "emt", SIGEMT },
{ "fpe", SIGFPE }, { "kill", SIGKILL },
{ "bus", SIGBUS }, { "segv", SIGSEGV },
{ "sys", SIGSYS }, { "pipe", SIGPIPE },
{ "alrm", SIGALRM }, { "term", SIGTERM },
{ "urg", SIGURG }, { "stop", SIGSTOP },
{ "tstp", SIGTSTP }, { "cont", SIGCONT },
{ "chld", SIGCHLD }, { "ttin", SIGTTIN },
{ "ttou", SIGTTOU }, { "io", SIGIO },
{ "xcpu", SIGXCPU }, { "xfsz", SIGXFSZ },
{ "vtalrm", SIGVTALRM }, { "prof", SIGPROF },
{ "winch", SIGWINCH }, { "info", SIGINFO },
{ "usr1", SIGUSR1 }, { "usr2", SIGUSR2 },
{ 0 },
};
pfs_readnote(sig, uio)
int sig;
struct uio *uio;
{
int xlen;
int error;
procfs_namemap_t *nm;
/* could do indexing by sig */
for (nm = procfs_signames; nm->nm_name; nm++)
if (nm->nm_val == sig)
break;
if (!nm->nm_name)
panic("pfs_readnote");
xlen = strlen(nm->nm_name);
if (uio->uio_resid < xlen)
return EMSGSIZE;
if (error = uiomove(nm->nm_name, xlen, uio))
return error;
return 0;
}
pfs_donote(curp, p, pfs, uio)
struct proc *curp;
struct proc *p;
struct pfsnode *pfs;
struct uio *uio;
{
int len = uio->uio_resid;
int xlen;
int error;
char note[PROCFS_NOTELEN+1];
procfs_namemap_t *nm;
int sig, mask;
if (pfs->pfs_type == Pnote && uio->uio_rw == UIO_READ) {
mask = p->p_sig & ~p->p_sigmask;
if (p->p_flag&SPPWAIT)
mask &= ~stopsigmask;
if (mask == 0)
return 0;
sig = ffs((long)mask);
if (error = pfs_readnote(sig, pfs, uio))
return error;
p->p_sig &= ~mask;
return 0;
}
if (uio->uio_rw != UIO_WRITE)
return (EINVAL);
xlen = PROCFS_NOTELEN;
error = procfs_getuserstr(uio, note, &xlen);
if (error)
return (error);
/*
* Map signal names into signal generation
* Unknown signals return EOPNOTSUPP.
*/
error = EOPNOTSUPP;
nm = procfs_findname(procfs_signames, note, xlen);
if (nm) {
if (pfs->pfs_type == Pnote)
psignal(p, nm->nm_val);
else
gsignal(p->p_pgid, nm->nm_val);
error = 0;
}
return (error);
}