pkg-monitoring-plugins/plugins-root/pst3.c

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/*****************************************************************************
*
* pst3
*
* License: GPL
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* Copyright (c) 2008 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the pst3 executable. This is a replacement ps command
* for Solaris to get output which provides a long argument listing, which
* is not possible with the standard ps command (due to truncation). /usr/ucb/ps
* also has issues where some fields run into each other.
*
* This executable works by reading process address structures, so needs
* to be executed as root
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*
* Originally written by R.W.Ingraham
* Rewritten by Duncan Ferguson (Altinity Ltd, June 2008)
* The rewrite was necessary as /dev/kmem is not available within
* non-global zones on Solaris 10
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*
* Details for rewrite came from
* source of /usr/ucb/ps on Solaris:
* http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/ucbcmd/ps/ps.c#argvoff
* usenet group posting
* http://groups.google.com/group/comp.unix.solaris/tree/browse_frm/month/2001-09/bfa40c08bac819a2?rnum=141&_done=%2Fgroup%2Fcomp.unix.solaris%2Fbrowse_frm%2Fmonth%2F2001-09%3F
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*****************************************************************************/
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#include <stdio.h>
#include <stdlib.h>
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#include <string.h>
#include <unistd.h>
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#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <procfs.h>
#include <sys/types32.h>
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/*
* Constants
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*/
#define PROC_DIR "/proc"
#define ARGS 30
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/*
* Globals
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*/
static char * szProg;
/*
* Prototypes
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*/
void usage();
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/*----------------------------------------------------------------------------*/
int main (int argc, char **argv)
{
DIR *procdir;
struct dirent *proc;
char ps_name[ARGS];
char as_name[ARGS];
psinfo_t psinfo;
/* Set our program name global */
if ((szProg = strrchr(argv[0], '/')) != NULL)
szProg++;
else
szProg = argv[0];
/* if given any parameters, print out help */
if(argc > 1) {
(void)usage();
exit(1);
}
/* Make sure that our euid is root */
if (geteuid() != 0)
{
fprintf(stderr, "%s: This program can only be run by the root user!\n", szProg);
exit(1);
}
if ((procdir = opendir(PROC_DIR)) == NULL) {
fprintf(stderr, "%s: cannot open PROC directory %s\n", szProg, PROC_DIR);
exit(1);
}
/* Display column headings */
printf("%c %5s %5s %5s %6s %6s %4s %s %s\n",
'S',
"UID",
"PID",
"PPID",
"VSZ",
"RSS",
"%CPU",
"COMMAND",
"ARGS"
);
/* Zip through all of the process entries */
while((proc = readdir(procdir))) {
int ps_fd;
int as_fd;
off_t argoff;
int i;
char *args;
char *procname;
char *ptr;
int argslen;
uintptr_t args_addr;;
uintptr_t *args_vecs;;
int args_count;
if(proc->d_name[0] == '.')
continue;
sprintf(ps_name,"%s/%s/%s",PROC_DIR,proc->d_name,"psinfo");
sprintf(as_name,"%s/%s/%s",PROC_DIR,proc->d_name,"as");
try_again:
if((ps_fd = open(ps_name, O_RDONLY)) == -1)
continue;
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if((as_fd = open(as_name, O_RDONLY)) == -1) {
close(ps_fd);
continue;
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}
if(read(ps_fd, &psinfo, sizeof(psinfo)) != sizeof(psinfo)) {
int err = errno;
close(ps_fd);
close(as_fd);
if(err == EAGAIN) goto try_again;
if(err != ENOENT)
fprintf(stderr, "%s: read() on %s: %s\n", szProg,
ps_name, strerror(err));
continue;
}
close(ps_fd);
/* system process, ignore since the previous version did */
if(
psinfo.pr_nlwp == 0 ||
strcmp(psinfo.pr_lwp.pr_clname, "SYS") == 0
) {
continue;
}
/* get the procname to match previous versions */
procname = strdup(psinfo.pr_psargs);
if((ptr = strchr(procname, ' ')) != NULL)
*ptr = '\0';
if((ptr = strrchr(procname, '/')) != NULL)
ptr++;
else
ptr = procname;
/*
* print out what we currently know
*/
printf("%c %5d %5d %5d %6lu %6lu %4.1f %s ",
psinfo.pr_lwp.pr_sname,
psinfo.pr_euid,
psinfo.pr_pid,
psinfo.pr_ppid,
psinfo.pr_size,
psinfo.pr_rssize,
((float)(psinfo.pr_pctcpu) / 0x8000 * 100.0),
ptr
);
free(procname);
/*
* and now for the command line stuff
*/
args_addr = psinfo.pr_argv;
args_count = psinfo.pr_argc;
args_vecs = malloc(args_count * sizeof(uintptr_t));
if(psinfo.pr_dmodel == PR_MODEL_NATIVE) {
/* this process matches target process */
pread(as_fd,args_vecs, args_count * sizeof(uintptr_t),
args_addr);
} else {
/* this process is 64bit, target process is 32 bit*/
caddr32_t *args_vecs32 = (caddr32_t *)args_vecs;
pread(as_fd,args_vecs32,args_count * sizeof(caddr32_t),
args_addr);
for (i=args_count-1;i>=0;--i)
args_vecs[i]=args_vecs32[i];
}
/*
* now read in the args - if what we read in fills buffer
* resize buffer and reread that bit again
*/
argslen=ARGS;
args=malloc(argslen+1);
for(i=0;i<args_count;i++) {
memset(args,'\0',argslen+1);
if(pread(as_fd, args, argslen, args_vecs[i]) <= 0) {
break;
}
args[argslen]='\0';
if(strlen(args) == argslen){
argslen += ARGS;
args = realloc(args, argslen + 1);
i--;
continue;
}
printf(" %s", args);
}
free(args_vecs);
free(args);
close(as_fd);
printf("\n");
}
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(void) closedir(procdir);
return (0);
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}
/*----------------------------------------------------------------------------*/
void usage() {
printf("%s: Help output\n\n", szProg);
printf("If this program is given any arguments, this help is displayed.\n");
printf("This command is used to print out the full command line for all\n");
printf("running processes because /usr/bin/ps is limited to 80 chars and\n");
printf("/usr/ucb/ps can merge columns together.\n\n");
printf("Columns are:\n");
printf("\tS - State of process - see 'ps' man page\n");
printf("\tUID - UID of the process owner\n");
printf("\tPID - PID of the process\n");
printf("\tPPID - PID of the parent process\n");
printf("\tVSZ - Virtual memory usage (kilobytes)\n");
printf("\tRSS - Real memory usage (kilobytes)\n");
printf("\t%%CPU - CPU usage\n");
printf("\tCOMMAND - Command being run\n");
printf("\tARGS - Full command line with arguements\n");
return;
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}