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/*
* 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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2022 Spencer Evans-Cole.
*/
#include <stdio.h>
#include <stdio_ext.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <sys/types.h>
#include <stropts.h>
#include <poll.h>
#include <procfs.h>
#include <sys/resource.h>
#include <limits.h>
#include "ptools_common.h"
static int count_my_files();
static char *command;
/* slop to account for extra file descriptors opened by libraries we call */
#define SLOP 5
int
main(int argc, char **argv)
{
char buf[PATH_MAX];
unsigned long remain = 0;
struct pollfd *pollfd;
struct pollfd *pfd;
struct rlimit rlim;
char *arg;
unsigned i;
int verbose = 0;
pid_t mypid = getpid();
if ((command = strrchr(argv[0], '/')) != NULL)
command++;
else
command = argv[0];
argc--;
argv++;
if (argc > 0 && strcmp(argv[0], "-v") == 0) {
verbose = 1;
argc--;
argv++;
}
if (argc <= 0) {
(void) fprintf(stderr, "usage:\t%s [-v] pid ...\n", command);
(void) fprintf(stderr, " (wait for processes to terminate)\n");
(void) fprintf(stderr,
" -v: verbose; report terminations to standard out\n");
return (2);
}
(void) proc_snprintf(buf, sizeof (buf), "/proc/");
/* make sure we have enough file descriptors */
if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) {
int nfiles = count_my_files();
if (rlim.rlim_cur < argc + nfiles + SLOP) {
rlim.rlim_cur = argc + nfiles + SLOP;
if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
(void) fprintf(stderr,
"%s: insufficient file descriptors\n",
command);
return (2);
}
}
(void) enable_extended_FILE_stdio(-1, -1);
}
pollfd = (struct pollfd *)malloc(argc*sizeof (struct pollfd));
if (pollfd == NULL) {
perror("malloc");
return (2);
}
for (i = 0; i < argc; i++) {
char psinfofile[100];
arg = argv[i];
if (mypid == atol(arg)) {
if (verbose) {
(void) printf("%s: has the same"
" pid as this process\n", arg);
}
continue;
}
if (strchr(arg, '/') != NULL)
(void) strncpy(psinfofile, arg, sizeof (psinfofile));
else {
(void) strcpy(psinfofile, buf);
(void) strncat(psinfofile, arg, sizeof (psinfofile)-6);
}
(void) strncat(psinfofile, "/psinfo",
sizeof (psinfofile) - strlen(psinfofile));
pfd = &pollfd[i];
if ((pfd->fd = open(psinfofile, O_RDONLY)) >= 0) {
remain++;
/*
* We set POLLPRI to detect system processes.
* We will get POLLNVAL below for a POLLPRI
* requested event on a system process.
*/
pfd->events = POLLPRI;
pfd->revents = 0;
} else if (errno == ENOENT) {
(void) fprintf(stderr, "%s: no such process: %s\n",
command, arg);
} else {
perror(arg);
}
}
while (remain != 0) {
while (poll(pollfd, argc, INFTIM) < 0) {
if (errno != EAGAIN) {
perror("poll");
return (2);
}
(void) sleep(2);
}
for (i = 0; i < argc; i++) {
pfd = &pollfd[i];
if (pfd->fd < 0 || (pfd->revents & ~POLLPRI) == 0) {
/*
* We don't care if a non-system process
* stopped. Don't check for that again.
*/
pfd->events = 0;
pfd->revents = 0;
continue;
}
if (verbose) {
arg = argv[i];
if (pfd->revents & POLLHUP) {
psinfo_t psinfo;
if (pread(pfd->fd, &psinfo,
sizeof (psinfo), (off_t)0)
== sizeof (psinfo)) {
(void) printf("%s: terminated,"
" wait status 0x%.4x\n",
arg, psinfo.pr_wstat);
} else {
(void) printf(
"%s: terminated\n", arg);
}
}
if (pfd->revents & POLLNVAL)
(void) printf("%s: system process\n",
arg);
if (pfd->revents & ~(POLLPRI|POLLHUP|POLLNVAL))
(void) printf("%s: unknown error\n",
arg);
}
(void) close(pfd->fd);
pfd->fd = -1;
remain--;
}
}
return (0);
}
/* ARGSUSED1 */
static int
do_count(void *nofilesp, int fd)
{
(*(int *)nofilesp)++;
return (0);
}
static int
count_my_files()
{
int nofiles = 0;
(void) fdwalk(do_count, &nofiles);
return (nofiles);
}
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