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/* $Id: port-solaris.c,v 1.1 2006/08/30 17:24:42 djm Exp $ */
/*
* Copyright (c) 2006 Chad Mynhier.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include "includes.h"
#ifdef USE_SOLARIS_PROCESS_CONTRACTS
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <errno.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#include <string.h>
#include <unistd.h>
#include <libcontract.h>
#include <sys/contract/process.h>
#include <sys/ctfs.h>
#include "log.h"
#define CT_TEMPLATE CTFS_ROOT "/process/template"
#define CT_LATEST CTFS_ROOT "/process/latest"
static int tmpl_fd = -1;
/* Lookup the latest process contract */
static ctid_t
get_active_process_contract_id(void)
{
int stat_fd;
ctid_t ctid = -1;
ct_stathdl_t stathdl;
if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) {
error("%s: Error opening 'latest' process "
"contract: %s", __func__, strerror(errno));
return -1;
}
if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) {
error("%s: Error reading process contract "
"status: %s", __func__, strerror(errno));
goto out;
}
if ((ctid = ct_status_get_id(stathdl)) < 0) {
error("%s: Error getting process contract id: %s",
__func__, strerror(errno));
goto out;
}
ct_status_free(stathdl);
out:
close(stat_fd);
return ctid;
}
void
solaris_contract_pre_fork(void)
{
if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) {
error("%s: open %s: %s", __func__,
CT_TEMPLATE, strerror(errno));
return;
}
debug2("%s: setting up process contract template on fd %d",
__func__, tmpl_fd);
/* We have to set certain attributes before activating the template */
if (ct_pr_tmpl_set_fatal(tmpl_fd,
CT_PR_EV_HWERR|CT_PR_EV_SIGNAL|CT_PR_EV_CORE) != 0) {
error("%s: Error setting process contract template "
"fatal events: %s", __func__, strerror(errno));
goto fail;
}
if (ct_tmpl_set_critical(tmpl_fd, CT_PR_EV_HWERR) != 0) {
error("%s: Error setting process contract template "
"critical events: %s", __func__, strerror(errno));
goto fail;
}
/* Now make this the active template for this process. */
if (ct_tmpl_activate(tmpl_fd) != 0) {
error("%s: Error activating process contract "
"template: %s", __func__, strerror(errno));
goto fail;
}
return;
fail:
if (tmpl_fd != -1) {
close(tmpl_fd);
tmpl_fd = -1;
}
}
void
solaris_contract_post_fork_child()
{
debug2("%s: clearing process contract template on fd %d",
__func__, tmpl_fd);
/* Clear the active template. */
if (ct_tmpl_clear(tmpl_fd) != 0)
error("%s: Error clearing active process contract "
"template: %s", __func__, strerror(errno));
close(tmpl_fd);
tmpl_fd = -1;
}
void
solaris_contract_post_fork_parent(pid_t pid)
{
ctid_t ctid;
char ctl_path[256];
int r, ctl_fd = -1, stat_fd = -1;
debug2("%s: clearing template (fd %d)", __func__, tmpl_fd);
if (tmpl_fd == -1)
return;
/* First clear the active template. */
if ((r = ct_tmpl_clear(tmpl_fd)) != 0)
error("%s: Error clearing active process contract "
"template: %s", __func__, strerror(errno));
close(tmpl_fd);
tmpl_fd = -1;
/*
* If either the fork didn't succeed (pid < 0), or clearing
* th active contract failed (r != 0), then we have nothing
* more do.
*/
if (r != 0 || pid <= 0)
return;
/* Now lookup and abandon the contract we've created. */
ctid = get_active_process_contract_id();
debug2("%s: abandoning contract id %ld", __func__, ctid);
snprintf(ctl_path, sizeof(ctl_path),
CTFS_ROOT "/process/%ld/ctl", ctid);
if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) {
error("%s: Error opening process contract "
"ctl file: %s", __func__, strerror(errno));
goto fail;
}
if (ct_ctl_abandon(ctl_fd) < 0) {
error("%s: Error abandoning process contract: %s",
__func__, strerror(errno));
goto fail;
}
close(ctl_fd);
return;
fail:
if (tmpl_fd != -1) {
close(tmpl_fd);
tmpl_fd = -1;
}
if (stat_fd != -1)
close(stat_fd);
if (ctl_fd != -1)
close(ctl_fd);
}
#endif
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