/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <errno.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <libproc.h>
extern int _getgroupsbymember(const char *, gid_t[], int, int);
static int look(char *);
static int perr(char *);
static void usage(void);
static void initcred(void);
static char *command;
static char *procname;
static char *user;
static char *group;
static char *grplst;
static char *login;
static boolean_t all = B_FALSE;
static boolean_t doset = B_FALSE;
static int ngrp = -1;
static gid_t *groups;
static long ngroups_max;
static uid_t uid = (uid_t)-1;
static gid_t gid = (gid_t)-1;
int
main(int argc, char **argv)
{
int rc = 0;
int c;
struct rlimit rlim;
if ((command = strrchr(argv[0], '/')) != NULL)
command++;
else
command = argv[0];
if ((ngroups_max = sysconf(_SC_NGROUPS_MAX)) < 0)
return (perr("sysconf(_SC_NGROUPS_MAX)"));
opterr = 0;
while ((c = getopt(argc, argv, "au:g:l:G:")) != EOF) {
switch (c) {
case 'a':
all = B_TRUE;
break;
case 'u':
user = optarg;
doset = B_TRUE;
break;
case 'g':
group = optarg;
doset = B_TRUE;
break;
case 'G':
grplst = optarg;
doset = B_TRUE;
break;
case 'l':
login = optarg;
doset = B_TRUE;
break;
default:
usage();
/*NOTREACHED*/
}
}
if (login != NULL && (user != NULL || group != NULL || grplst != NULL))
usage();
if (all && doset)
usage();
argc -= optind;
argv += optind;
if (argc == 0)
usage();
if (doset)
initcred();
/*
* Make sure we'll have enough file descriptors to handle a target
* that has many many mappings.
*/
if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) {
rlim.rlim_cur = rlim.rlim_max;
(void) setrlimit(RLIMIT_NOFILE, &rlim);
(void) enable_extended_FILE_stdio(-1, -1);
}
while (argc-- > 0)
rc += look(*argv++);
return (rc > 255 ? 255 : rc);
}
static void
credupdate(prcred_t *pcr)
{
if (uid != (uid_t)-1)
pcr->pr_euid = pcr->pr_ruid = pcr->pr_suid = uid;
if (gid != (gid_t)-1)
pcr->pr_egid = pcr->pr_rgid = pcr->pr_sgid = gid;
if (ngrp >= 0) {
pcr->pr_ngroups = ngrp;
(void) memcpy(pcr->pr_groups, groups, ngrp * sizeof (gid_t));
}
}
static int
look(char *arg)
{
struct ps_prochandle *Pr;
static prcred_t *prcred = NULL;
int gcode;
procname = arg; /* for perr() */
if (prcred == NULL) {
prcred = malloc(sizeof (prcred_t) +
(ngroups_max - 1) * sizeof (gid_t));
if (prcred == NULL) {
(void) perr("malloc");
exit(1);
}
}
if ((Pr = proc_arg_grab(arg, doset ? PR_ARG_PIDS : PR_ARG_ANY,
PGRAB_RETAIN | PGRAB_FORCE | (doset ? 0 : PGRAB_RDONLY) |
PGRAB_NOSTOP, &gcode)) == NULL) {
(void) fprintf(stderr, "%s: cannot examine %s: %s\n",
command, arg, Pgrab_error(gcode));
return (1);
}
if (Pcred(Pr, prcred, ngroups_max) == -1) {
(void) perr("getcred");
Prelease(Pr, 0);
return (1);
}
if (doset) {
credupdate(prcred);
if (Psetcred(Pr, prcred) != 0) {
(void) perr("setcred");
Prelease(Pr, 0);
return (1);
}
Prelease(Pr, 0);
return (0);
}
if (Pstate(Pr) == PS_DEAD)
(void) printf("core of %d:\t", (int)Pstatus(Pr)->pr_pid);
else
(void) printf("%d:\t", (int)Pstatus(Pr)->pr_pid);
if (!all &&
prcred->pr_euid == prcred->pr_ruid &&
prcred->pr_ruid == prcred->pr_suid)
(void) printf("e/r/suid=%u ", prcred->pr_euid);
else
(void) printf("euid=%u ruid=%u suid=%u ",
prcred->pr_euid, prcred->pr_ruid, prcred->pr_suid);
if (!all &&
prcred->pr_egid == prcred->pr_rgid &&
prcred->pr_rgid == prcred->pr_sgid)
(void) printf("e/r/sgid=%u\n", prcred->pr_egid);
else
(void) printf("egid=%u rgid=%u sgid=%u\n",
prcred->pr_egid, prcred->pr_rgid, prcred->pr_sgid);
if (prcred->pr_ngroups != 0 &&
(all || prcred->pr_ngroups != 1 ||
prcred->pr_groups[0] != prcred->pr_rgid)) {
int i;
(void) printf("\tgroups:");
for (i = 0; i < prcred->pr_ngroups; i++)
(void) printf(" %u", prcred->pr_groups[i]);
(void) printf("\n");
}
Prelease(Pr, 0);
return (0);
}
static int
perr(char *s)
{
if (s)
(void) fprintf(stderr, "%s: ", procname);
else
s = procname;
perror(s);
return (1);
}
static void
usage(void)
{
(void) fprintf(stderr, "usage:\t%s [-a] { pid | core } ...\n"
"\t%s [-u user] [-g group] [-G groups] pid ...\n"
"\t%s -l login pid ...\n"
" (report or modify process credentials)\n",
command, command, command);
exit(2);
}
static uint32_t
str2id(const char *str)
{
unsigned long res;
char *p;
errno = 0;
res = strtoul(str, &p, 0);
if (p == str || *p != '\0' || errno != 0)
return ((uint32_t)-1);
else
return ((uint32_t)res);
}
static gid_t
str2gid(const char *grnam)
{
struct group *grp = getgrnam(grnam);
gid_t res;
if (grp == NULL) {
res = (gid_t)str2id(grnam);
if (res == (gid_t)-1) {
(void) fprintf(stderr, "%s: %s: unknown group"
" or bad gid\n",
command, grnam);
exit(1);
}
} else {
res = grp->gr_gid;
}
return (res);
}
static void
initcred(void)
{
struct passwd *pwd;
if ((groups = malloc(ngroups_max * sizeof (gid_t))) == NULL) {
(void) perr("malloc");
exit(1);
}
if (login != NULL) {
pwd = getpwnam(login);
if (pwd == NULL) {
(void) fprintf(stderr, "%s: %s: unknown user\n",
command, login);
exit(1);
}
uid = pwd->pw_uid;
gid = pwd->pw_gid;
groups[0] = gid;
ngrp = _getgroupsbymember(login, groups, (int)ngroups_max, 1);
}
if (user != NULL) {
pwd = getpwnam(user);
if (pwd == NULL) {
uid = (uid_t)str2id(user);
if (uid == (uid_t)-1) {
(void) fprintf(stderr, "%s: %s: unknown user"
" or bad uid\n",
command, user);
exit(1);
}
} else {
uid = pwd->pw_uid;
}
}
if (group != NULL)
gid = str2gid(group);
if (grplst != NULL) {
char *cgrp;
ngrp = 0;
while ((cgrp = strtok(grplst, ",")) != NULL) {
if (ngrp >= ngroups_max) {
(void) fprintf(stderr, "%s: Too many groups\n",
command);
exit(1);
}
groups[ngrp++] = str2gid(cgrp);
/* For iterations of strtok */
grplst = NULL;
}
}
}