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✎ Editing: fpm_unix.c ← Back

/* $Id: fpm_unix.c,v 1.25.2.1 2008/12/13 03:18:23 anight Exp $ */
	/* (c) 2007,2008 Andrei Nigmatulin */

#include "fpm_config.h"

#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <sys/stat.h>

#ifdef HAVE_PRCTL
#include <sys/prctl.h>
#endif

#ifdef HAVE_APPARMOR
#include <sys/apparmor.h>
#endif

#ifdef HAVE_SYS_ACL_H
#include <sys/acl.h>
#endif

#include "fpm.h"
#include "fpm_conf.h"
#include "fpm_cleanup.h"
#include "fpm_clock.h"
#include "fpm_stdio.h"
#include "fpm_unix.h"
#include "fpm_signals.h"
#include "zlog.h"

size_t fpm_pagesize;

int fpm_unix_resolve_socket_premissions(struct fpm_worker_pool_s *wp) /* {{{ */
{
	struct fpm_worker_pool_config_s *c = wp->config;
#ifdef HAVE_FPM_ACL
	int n;

/* uninitialized */
	wp->socket_acl  = NULL;
#endif
	wp->socket_uid = -1;
	wp->socket_gid = -1;
	wp->socket_mode = 0660;

if (!c) {
		return 0;
	}

if (c->listen_mode && *c->listen_mode) {
		wp->socket_mode = strtoul(c->listen_mode, 0, 8);
	}

#ifdef HAVE_FPM_ACL
	/* count the users and groups configured */
	n = 0;
	if (c->listen_acl_users && *c->listen_acl_users) {
		char *p;
		n++;
		for (p=strchr(c->listen_acl_users, ',') ; p ; p=strchr(p+1, ',')) {
			n++;
		}
	}
	if (c->listen_acl_groups && *c->listen_acl_groups) {
		char *p;
		n++;
		for (p=strchr(c->listen_acl_groups, ',') ; p ; p=strchr(p+1, ',')) {
			n++;
		}
	}
	/* if ACL configured */
	if (n) {
		acl_t acl;
		acl_entry_t entry;
		acl_permset_t perm;
		char *tmp, *p, *end;

acl = acl_init(n);
		if (!acl) {
			zlog(ZLOG_SYSERROR, "[pool %s] cannot allocate ACL", wp->config->name);
			return -1;
		}
		/* Create USER ACL */
		if (c->listen_acl_users && *c->listen_acl_users) {
			struct passwd *pwd;

tmp = estrdup(c->listen_acl_users);
			for (p=tmp ; p ; p=end) {
				if ((end = strchr(p, ','))) {
					*end++ = 0;
				}
				pwd = getpwnam(p);
				if (pwd) {
					zlog(ZLOG_DEBUG, "[pool %s] user '%s' have uid=%d", wp->config->name, p, pwd->pw_uid);
				} else {
					zlog(ZLOG_SYSERROR, "[pool %s] cannot get uid for user '%s'", wp->config->name, p);
					acl_free(acl);
					efree(tmp);
					return -1;
				}
				if (0 > acl_create_entry(&acl, &entry) ||
					0 > acl_set_tag_type(entry, ACL_USER) ||
					0 > acl_set_qualifier(entry, &pwd->pw_uid) ||
					0 > acl_get_permset(entry, &perm) ||
					0 > acl_clear_perms (perm) ||
					0 > acl_add_perm (perm, ACL_READ) ||
					0 > acl_add_perm (perm, ACL_WRITE)) {
					zlog(ZLOG_SYSERROR, "[pool %s] cannot create ACL for user '%s'", wp->config->name, p);
					acl_free(acl);
					efree(tmp);
					return -1;
				}
			}
			efree(tmp);
		}
		/* Create GROUP ACL */
		if (c->listen_acl_groups && *c->listen_acl_groups) {
			struct group *grp;

tmp = estrdup(c->listen_acl_groups);
			for (p=tmp ; p ; p=end) {
				if ((end = strchr(p, ','))) {
					*end++ = 0;
				}
				grp = getgrnam(p);
				if (grp) {
					zlog(ZLOG_DEBUG, "[pool %s] group '%s' have gid=%d", wp->config->name, p, grp->gr_gid);
				} else {
					zlog(ZLOG_SYSERROR, "[pool %s] cannot get gid for group '%s'", wp->config->name, p);
					acl_free(acl);
					efree(tmp);
					return -1;
				}
				if (0 > acl_create_entry(&acl, &entry) ||
					0 > acl_set_tag_type(entry, ACL_GROUP) ||
					0 > acl_set_qualifier(entry, &grp->gr_gid) ||
					0 > acl_get_permset(entry, &perm) ||
					0 > acl_clear_perms (perm) ||
					0 > acl_add_perm (perm, ACL_READ) ||
					0 > acl_add_perm (perm, ACL_WRITE)) {
					zlog(ZLOG_SYSERROR, "[pool %s] cannot create ACL for group '%s'", wp->config->name, p);
					acl_free(acl);
					efree(tmp);
					return -1;
				}
			}
			efree(tmp);
		}
		if (c->listen_owner && *c->listen_owner) {
			zlog(ZLOG_WARNING, "[pool %s] ACL set, listen.owner = '%s' is ignored", wp->config->name, c->listen_owner);
		}
		if (c->listen_group && *c->listen_group) {
			zlog(ZLOG_WARNING, "[pool %s] ACL set, listen.group = '%s' is ignored", wp->config->name, c->listen_group);
		}
		wp->socket_acl  = acl;
		return 0;
	}
	/* When listen.users and listen.groups not configured, continue with standard right */
#endif

if (c->listen_owner && *c->listen_owner) {
		struct passwd *pwd;

pwd = getpwnam(c->listen_owner);
		if (!pwd) {
			zlog(ZLOG_SYSERROR, "[pool %s] cannot get uid for user '%s'", wp->config->name, c->listen_owner);
			return -1;
		}

wp->socket_uid = pwd->pw_uid;
		wp->socket_gid = pwd->pw_gid;
	}

if (c->listen_group && *c->listen_group) {
		struct group *grp;

grp = getgrnam(c->listen_group);
		if (!grp) {
			zlog(ZLOG_SYSERROR, "[pool %s] cannot get gid for group '%s'", wp->config->name, c->listen_group);
			return -1;
		}
		wp->socket_gid = grp->gr_gid;
	}

return 0;
}
/* }}} */

int fpm_unix_set_socket_premissions(struct fpm_worker_pool_s *wp, const char *path) /* {{{ */
{
#ifdef HAVE_FPM_ACL
	if (wp->socket_acl) {
		acl_t aclfile, aclconf;
		acl_entry_t entryfile, entryconf;
		int i;

/* Read the socket ACL */
		aclconf = wp->socket_acl;
		aclfile = acl_get_file (path, ACL_TYPE_ACCESS);
		if (!aclfile) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to read the ACL of the socket '%s'", wp->config->name, path);
			return -1;
		}
		/* Copy the new ACL entry from config */
		for (i=ACL_FIRST_ENTRY ; acl_get_entry(aclconf, i, &entryconf) ; i=ACL_NEXT_ENTRY) {
			if (0 > acl_create_entry (&aclfile, &entryfile) ||
			    0 > acl_copy_entry(entryfile, entryconf)) {
				zlog(ZLOG_SYSERROR, "[pool %s] failed to add entry to the ACL of the socket '%s'", wp->config->name, path);
				acl_free(aclfile);
				return -1;
			}
		}
		/* Write the socket ACL */
		if (0 > acl_calc_mask (&aclfile) ||
			0 > acl_valid (aclfile) ||
			0 > acl_set_file (path, ACL_TYPE_ACCESS, aclfile)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to write the ACL of the socket '%s'", wp->config->name, path);
			acl_free(aclfile);
			return -1;
		} else {
			zlog(ZLOG_DEBUG, "[pool %s] ACL of the socket '%s' is set", wp->config->name, path);
		}

acl_free(aclfile);
		return 0;
	}
	/* When listen.users and listen.groups not configured, continue with standard right */
#endif

if (wp->socket_uid != -1 || wp->socket_gid != -1) {
		if (0 > chown(path, wp->socket_uid, wp->socket_gid)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to chown() the socket '%s'", wp->config->name, wp->config->listen_address);
			return -1;
		}
	}
	return 0;
}
/* }}} */

int fpm_unix_free_socket_premissions(struct fpm_worker_pool_s *wp) /* {{{ */
{
#ifdef HAVE_FPM_ACL
	if (wp->socket_acl) {
		return acl_free(wp->socket_acl);
	}
#endif
	return 0;
}
/* }}} */

static int fpm_unix_conf_wp(struct fpm_worker_pool_s *wp) /* {{{ */
{
	struct passwd *pwd;
	int is_root = !geteuid();

if (is_root) {
		if (wp->config->user && *wp->config->user) {
			if (strlen(wp->config->user) == strspn(wp->config->user, "0123456789")) {
				wp->set_uid = strtoul(wp->config->user, 0, 10);
			} else {
				struct passwd *pwd;

pwd = getpwnam(wp->config->user);
				if (!pwd) {
					zlog(ZLOG_ERROR, "[pool %s] cannot get uid for user '%s'", wp->config->name, wp->config->user);
					return -1;
				}

wp->set_uid = pwd->pw_uid;
				wp->set_gid = pwd->pw_gid;

wp->user = strdup(pwd->pw_name);
				wp->home = strdup(pwd->pw_dir);
			}
		}

if (wp->config->group && *wp->config->group) {
			if (strlen(wp->config->group) == strspn(wp->config->group, "0123456789")) {
				wp->set_gid = strtoul(wp->config->group, 0, 10);
			} else {
				struct group *grp;

grp = getgrnam(wp->config->group);
				if (!grp) {
					zlog(ZLOG_ERROR, "[pool %s] cannot get gid for group '%s'", wp->config->name, wp->config->group);
					return -1;
				}
				wp->set_gid = grp->gr_gid;
			}
		}

if (!fpm_globals.run_as_root) {
			if (wp->set_uid == 0 || wp->set_gid == 0) {
				zlog(ZLOG_ERROR, "[pool %s] please specify user and group other than root", wp->config->name);
				return -1;
			}
		}
	} else { /* not root */
		if (wp->config->user && *wp->config->user) {
			zlog(ZLOG_NOTICE, "[pool %s] 'user' directive is ignored when FPM is not running as root", wp->config->name);
		}
		if (wp->config->group && *wp->config->group) {
			zlog(ZLOG_NOTICE, "[pool %s] 'group' directive is ignored when FPM is not running as root", wp->config->name);
		}
		if (wp->config->chroot && *wp->config->chroot) {
			zlog(ZLOG_NOTICE, "[pool %s] 'chroot' directive is ignored when FPM is not running as root", wp->config->name);
		}
		if (wp->config->process_priority != 64) {
			zlog(ZLOG_NOTICE, "[pool %s] 'process.priority' directive is ignored when FPM is not running as root", wp->config->name);
		}

/* set up HOME and USER anyway */
		pwd = getpwuid(getuid());
		if (pwd) {
			wp->user = strdup(pwd->pw_name);
			wp->home = strdup(pwd->pw_dir);
		}
	}
	return 0;
}
/* }}} */

int fpm_unix_init_child(struct fpm_worker_pool_s *wp) /* {{{ */
{
	int is_root = !geteuid();
	int made_chroot = 0;

if (wp->config->rlimit_files) {
		struct rlimit r;

r.rlim_max = r.rlim_cur = (rlim_t) wp->config->rlimit_files;

if (0 > setrlimit(RLIMIT_NOFILE, &r)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to set rlimit_files for this pool. Please check your system limits or decrease rlimit_files. setrlimit(RLIMIT_NOFILE, %d)", wp->config->name, wp->config->rlimit_files);
		}
	}

if (wp->config->rlimit_core) {
		struct rlimit r;

r.rlim_max = r.rlim_cur = wp->config->rlimit_core == -1 ? (rlim_t) RLIM_INFINITY : (rlim_t) wp->config->rlimit_core;

if (0 > setrlimit(RLIMIT_CORE, &r)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to set rlimit_core for this pool. Please check your system limits or decrease rlimit_core. setrlimit(RLIMIT_CORE, %d)", wp->config->name, wp->config->rlimit_core);
		}
	}

// START CASE CPANEL-7016
	// Jail PHP-FPM if the user is using noshell or jailshell no matter what

char *jail_toggle_file = "/var/cpanel/feature_toggles/apachefpmjail";

struct stat sb;
	struct passwd* pwd;
	pwd = getpwnam(wp->config->user);
	if ( stat(jail_toggle_file, &sb) == 0 && pwd != NULL ) {
		zlog(ZLOG_DEBUG, "[pool %s] got to getpwnam(%s)", wp->config->name, wp->config->user);
		zlog(ZLOG_DEBUG, "[pool %s] getpwnam vars pw_shell: %s pw_dir: %s ", wp->config->name, pwd->pw_shell, pwd->pw_dir);

if ( strcmp( pwd->pw_shell, "/usr/local/cpanel/bin/noshell" ) == 0 || strcmp( pwd->pw_shell, "/usr/local/cpanel/bin/jailshell" ) == 0 ) {
			zlog(ZLOG_DEBUG, "[pool %s] Was able to check the pool", wp->config->name);
			char *virtfs_home = (char*) emalloc( strlen("/home/virtfs/") + strlen( wp->config->user ) + 2);
			strcpy(virtfs_home, "/home/virtfs/" );
			zlog(ZLOG_DEBUG, "[pool %s] allocated the string (%s)", wp->config->name, virtfs_home);
			strcat(virtfs_home, wp->config->user);
			strcat(virtfs_home, "/");
			zlog(ZLOG_DEBUG, "[pool %s] built the vitfs path(%s)", wp->config->name, virtfs_home);

wp->config->chdir = strdup(pwd->pw_dir);
			wp->config->chroot = strdup(virtfs_home);
			efree( virtfs_home );
			zlog(ZLOG_DEBUG, "[pool %s] set variables %s %s", wp->config->name, wp->config->chroot,  wp->config->chdir );
		}

zlog(ZLOG_DEBUG, "[pool %s] Made it past the strcmp on pwd->pw_shell", wp->config->name);

if ( wp->config->chroot && strstr( wp->config->chroot, "/virtfs/" ) ) {
		   zlog(ZLOG_DEBUG, "[pool %s] chroot matches virtfs: %s", wp->config->name, wp->config->chroot);

char *check_directory = emalloc( strlen( wp->config->chroot ) + strlen("/opt/cpanel") + 1);
		   strcpy(check_directory, wp->config->chroot);
		   strcat(check_directory, "/opt/cpanel");

if ( !(stat(check_directory, &sb) == 0 && S_ISDIR(sb.st_mode) ) ) {
		       zlog(ZLOG_DEBUG, "[pool %s] directory does not exist %s", wp->config->name, check_directory);

char *jail_command = emalloc(strlen("/usr/local/cpanel/bin/jailmount ")+strlen(wp->config->user)+1);
		       strcpy(jail_command, "/usr/local/cpanel/bin/jailmount ");
		       strcat(jail_command, wp->config->user);

if ( 0 != system( jail_command ) ) {
		           zlog(ZLOG_DEBUG, "[pool %s] /usr/local/cpanel/bin/jailmount returned a non-0 exit status for user(%s) %s", wp->config->name, wp->config->user, jail_command);
		           efree( jail_command );
		           efree( check_directory );
		           return -1;
		       }
		       else {
		           zlog(ZLOG_DEBUG, "[pool %s] /usr/local/cpanel/bin/jailmount returned a zero exit status for user(%s) %s", wp->config->name, wp->config->user, jail_command);
		       }
		       efree( jail_command );
		   }
		   else {
		       zlog(ZLOG_DEBUG, "[pool %s] directory exists %s", wp->config->name, check_directory);
		   }
		}
		else {
		   zlog(ZLOG_DEBUG, "[pool %s] chroot does not match virtfs: %s", wp->config->name, wp->config->chroot);
		}
	}
	else if (pwd == NULL) {
		// This condition should never be hit due to earlier checks, but adding it for safety's sake
		zlog(ZLOG_SYSERROR, "[pool %s] Unable to perform getpwnam on user: %s", wp->config->name, wp->config->user);
	}
	// END CASE CPANEL-7016

if (is_root && wp->config->chroot && *wp->config->chroot) {
		if (0 > chroot(wp->config->chroot)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to chroot(%s)",  wp->config->name, wp->config->chroot);
			return -1;
		}
		made_chroot = 1;
	}

if (wp->config->chdir && *wp->config->chdir) {
		if (0 > chdir(wp->config->chdir)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to chdir(%s)", wp->config->name, wp->config->chdir);
			return -1;
		}
	} else if (made_chroot) {
		if (0 > chdir("/")) {
			zlog(ZLOG_WARNING, "[pool %s] failed to chdir(/)", wp->config->name);
		}
	}

if (is_root) {

if (wp->config->process_priority != 64) {
			if (setpriority(PRIO_PROCESS, 0, wp->config->process_priority) < 0) {
				zlog(ZLOG_SYSERROR, "[pool %s] Unable to set priority for this new process", wp->config->name);
				return -1;
			}
		}

if (wp->set_gid) {
			if (0 > setgid(wp->set_gid)) {
				zlog(ZLOG_SYSERROR, "[pool %s] failed to setgid(%d)", wp->config->name, wp->set_gid);
				return -1;
			}
		}
		if (wp->set_uid) {
			if (0 > initgroups(wp->config->user, wp->set_gid)) {
				zlog(ZLOG_SYSERROR, "[pool %s] failed to initgroups(%s, %d)", wp->config->name, wp->config->user, wp->set_gid);
				return -1;
			}
			if (0 > setuid(wp->set_uid)) {
				zlog(ZLOG_SYSERROR, "[pool %s] failed to setuid(%d)", wp->config->name, wp->set_uid);
				return -1;
			}
		}
	}

#ifdef HAVE_PRCTL
	if (wp->config->process_dumpable && 0 > prctl(PR_SET_DUMPABLE, 1, 0, 0, 0)) {
		zlog(ZLOG_SYSERROR, "[pool %s] failed to prctl(PR_SET_DUMPABLE)", wp->config->name);
	}
#endif

if (0 > fpm_clock_init()) {
		return -1;
	}

#ifdef HAVE_APPARMOR
	if (wp->config->apparmor_hat) {
		char *con, *new_con;

if (aa_getcon(&con, NULL) == -1) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to query apparmor confinement. Please check if \"/proc/*/attr/current\" is read and writeable.", wp->config->name);
			return -1;
		}

new_con = malloc(strlen(con) + strlen(wp->config->apparmor_hat) + 3); // // + 0 Byte
		if (!new_con) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to allocate memory for apparmor hat change.", wp->config->name);
			return -1;
		}

if (0 > sprintf(new_con, "%s//%s", con, wp->config->apparmor_hat)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to construct apparmor confinement.", wp->config->name);
			return -1;
		}

if (0 > aa_change_profile(new_con)) {
			zlog(ZLOG_SYSERROR, "[pool %s] failed to change to new confinement (%s). Please check if \"/proc/*/attr/current\" is read and writeable and \"change_profile -> %s//*\" is allowed.", wp->config->name, new_con, con);
			return -1;
		}

free(con);
		free(new_con);
	}
#endif

return 0;
}
/* }}} */

int fpm_unix_init_main() /* {{{ */
{
	struct fpm_worker_pool_s *wp;
	int is_root = !geteuid();

if (fpm_global_config.rlimit_files) {
		struct rlimit r;

r.rlim_max = r.rlim_cur = (rlim_t) fpm_global_config.rlimit_files;

if (0 > setrlimit(RLIMIT_NOFILE, &r)) {
			zlog(ZLOG_SYSERROR, "failed to set rlimit_core for this pool. Please check your system limits or decrease rlimit_files. setrlimit(RLIMIT_NOFILE, %d)", fpm_global_config.rlimit_files);
			return -1;
		}
	}

if (fpm_global_config.rlimit_core) {
		struct rlimit r;

r.rlim_max = r.rlim_cur = fpm_global_config.rlimit_core == -1 ? (rlim_t) RLIM_INFINITY : (rlim_t) fpm_global_config.rlimit_core;

if (0 > setrlimit(RLIMIT_CORE, &r)) {
			zlog(ZLOG_SYSERROR, "failed to set rlimit_core for this pool. Please check your system limits or decrease rlimit_core. setrlimit(RLIMIT_CORE, %d)", fpm_global_config.rlimit_core);
			return -1;
		}
	}

fpm_pagesize = getpagesize();
	if (fpm_global_config.daemonize) {
		/*
		 * If daemonize, the calling process will die soon
		 * and the master process continues to initialize itself.
		 *
		 * The parent process has then to wait for the master
		 * process to initialize to return a consistent exit
		 * value. For this pupose, the master process will
		 * send \"1\" into the pipe if everything went well 
		 * and \"0\" otherwise.
		 */

struct timeval tv;
		fd_set rfds;
		int ret;

if (pipe(fpm_globals.send_config_pipe) == -1) {
			zlog(ZLOG_SYSERROR, "failed to create pipe");
			return -1;
		}

/* then fork */
		pid_t pid = fork();
		switch (pid) {

case -1 : /* error */
				zlog(ZLOG_SYSERROR, "failed to daemonize");
				return -1;

case 0 : /* children */
				close(fpm_globals.send_config_pipe[0]); /* close the read side of the pipe */
				break;

default : /* parent */
				close(fpm_globals.send_config_pipe[1]); /* close the write side of the pipe */

/*
				 * wait for 10s before exiting with error
				 * the child is supposed to send 1 or 0 into the pipe to tell the parent
				 * how it goes for it
				 */
				FD_ZERO(&rfds);
				FD_SET(fpm_globals.send_config_pipe[0], &rfds);

tv.tv_sec = 10;
				tv.tv_usec = 0;

zlog(ZLOG_DEBUG, "The calling process is waiting for the master process to ping via fd=%d", fpm_globals.send_config_pipe[0]);
				ret = select(fpm_globals.send_config_pipe[0] + 1, &rfds, NULL, NULL, &tv);
				if (ret == -1) {
					zlog(ZLOG_SYSERROR, "failed to select");
					exit(FPM_EXIT_SOFTWARE);
				}
				if (ret) { /* data available */
					int readval;
					ret = read(fpm_globals.send_config_pipe[0], &readval, sizeof(readval));
					if (ret == -1) {
						zlog(ZLOG_SYSERROR, "failed to read from pipe");
						exit(FPM_EXIT_SOFTWARE);
					}

if (ret == 0) {
						zlog(ZLOG_ERROR, "no data have been read from pipe");
						exit(FPM_EXIT_SOFTWARE);
					} else {
						if (readval == 1) {
							zlog(ZLOG_DEBUG, "I received a valid acknoledge from the master process, I can exit without error");
							fpm_cleanups_run(FPM_CLEANUP_PARENT_EXIT);
							exit(FPM_EXIT_OK);
						} else {
							zlog(ZLOG_DEBUG, "The master process returned an error !");
							exit(FPM_EXIT_SOFTWARE);
						}
					}
				} else { /* no date sent ! */
					zlog(ZLOG_ERROR, "the master process didn't send back its status (via the pipe to the calling process)");
				  exit(FPM_EXIT_SOFTWARE);
				}
				exit(FPM_EXIT_SOFTWARE);
		}
	}

/* continue as a child */
	setsid();
	if (0 > fpm_clock_init()) {
		return -1;
	}

if (fpm_global_config.process_priority != 64) {
		if (is_root) {
			if (setpriority(PRIO_PROCESS, 0, fpm_global_config.process_priority) < 0) {
				zlog(ZLOG_SYSERROR, "Unable to set priority for the master process");
				return -1;
			}
		} else {
			zlog(ZLOG_NOTICE, "'process.priority' directive is ignored when FPM is not running as root");
		}
	}

fpm_globals.parent_pid = getpid();
	for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
		if (0 > fpm_unix_conf_wp(wp)) {
			return -1;
		}
	}

return 0;
}
/* }}} */

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