plugins-root/pst3.c

   1 /*****************************************************************************
   2 *
   3 * pst3
   4 *
   5 * License: GPL
   6 * Copyright (c) 2008 Nagios Plugin Development Team
   7 *
   8 * Description:
   9 *
  10 * This file contains the pst3 executable. This is a replacement ps command
  11 * for Solaris to get output which provides a long argument listing, which
  12 * is not possible with the standard ps command (due to truncation). /usr/ucb/ps
  13 * also has issues where some fields run into each other.
  14 *
  15 * This executable works by reading process address structures, so needs
  16 * to be executed as root
  17 *
  18 * Originally written by R.W.Ingraham
  19 * Rewritten by Duncan Ferguson (Altinity Ltd, June 2008)
  20 *   The rewrite was necessary as /dev/kmem is not available within
  21 *   non-global zones on Solaris 10
  22 *
  23 *   Details for rewrite came from
  24 *    source of /usr/ucb/ps on Solaris:
  25 *     http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/ucbcmd/ps/ps.c#argvoff
  26 *    usenet group posting
  27 *     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
  28 *
  29 * This program is free software: you can redistribute it and/or modify
  30 * it under the terms of the GNU General Public License as published by
  31 * the Free Software Foundation, either version 3 of the License, or
  32 * (at your option) any later version.
  33 *
  34 * This program is distributed in the hope that it will be useful,
  35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  37 * GNU General Public License for more details.
  38 *
  39 * You should have received a copy of the GNU General Public License
  40 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  41 *
  42 *****************************************************************************/
  43
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <dirent.h>
  47 #include <errno.h>
  48 #include <fcntl.h>
  49 #include <procfs.h>
  50 #include <errno.h>
  51 #include <sys/types32.h>
  52
  53 /*
  54  *  Constants
  55  */
  56
  57 #define PROC_DIR  "/proc"
  58 #define ARGS            30
  59
  60 /*
  61  *  Globals
  62  */
  63
  64 static char *        szProg;
  65
  66 /*
  67  *  Prototypes
  68  */
  69 void usage();
  70
  71 /*----------------------------------------------------------------------------*/
  72
  73 int main (int argc, char **argv)
  74 {
  75   DIR *procdir;
  76   struct dirent *proc;
  77   char ps_name[ARGS];
  78   char as_name[ARGS];
  79   psinfo_t psinfo;
  80
  81   /* Set our program name global */
  82   if ((szProg = strrchr(argv[0], '/')) != NULL)
  83     szProg++;
  84   else
  85     szProg = argv[0];
  86
  87   /* if given any parameters, print out help */
  88   if(argc > 1) {
  89     (void)usage();
  90     exit(1);
  91   }
  92
  93   /* Make sure that our euid is root */
  94   if (geteuid() != 0)
  95   {
  96     fprintf(stderr, "%s: This program can only be run by the root user!\n", szProg);
  97     exit(1);
  98   }
  99
 100   if ((procdir = opendir(PROC_DIR)) == NULL) {
 101     fprintf(stderr, "%s: cannot open PROC directory %s\n", szProg, PROC_DIR);
 102     exit(1);
 103   }
 104
 105   /* Display column headings */
 106   printf("%c %5s %5s %5s %6s %6s %4s %s %s\n",
 107     'S',
 108     "UID",
 109     "PID",
 110     "PPID",
 111     "VSZ",
 112     "RSS",
 113     "%CPU",
 114     "COMMAND",
 115     "ARGS"
 116   );
 117
 118   /* Zip through all of the process entries */
 119   while((proc = readdir(procdir))) {
 120     int ps_fd;
 121     int as_fd;
 122     off_t argoff;
 123     int i;
 124     char *args;
 125     char *procname;
 126     char *ptr;
 127     int argslen;
 128     uintptr_t args_addr;;
 129     uintptr_t *args_vecs;;
 130     int args_count;
 131
 132     if(proc->d_name[0] == '.')
 133       continue;
 134
 135     sprintf(ps_name,"%s/%s/%s",PROC_DIR,proc->d_name,"psinfo");
 136     sprintf(as_name,"%s/%s/%s",PROC_DIR,proc->d_name,"as");
 137 try_again:
 138     if((ps_fd = open(ps_name, O_RDONLY)) == -1)
 139       continue;
 140
 141     if((as_fd = open(as_name, O_RDONLY)) == -1)
 142       continue;
 143
 144     if(read(ps_fd, &psinfo, sizeof(psinfo)) != sizeof(psinfo)) {
 145       int err = errno;
 146       close(ps_fd);
 147       close(as_fd);
 148       if(err == EAGAIN) goto try_again;
 149       if(err != ENOENT)
 150         fprintf(stderr, "%s: read() on %s: %s\n", szProg,
 151           ps_name, strerror(err));
 152       continue;
 153     }
 154     close(ps_fd);
 155
 156     /* system process, ignore since the previous version did */
 157     if(
 158       psinfo.pr_nlwp == 0 ||
 159       strcmp(psinfo.pr_lwp.pr_clname, "SYS") == 0
 160     ) {
 161       continue;
 162     }
 163
 164     /* get the procname to match previous versions */
 165     procname = strdup(psinfo.pr_psargs);
 166     if((ptr = strchr(procname, ' ')) != NULL)
 167         *ptr = '\0';
 168     if((ptr = strrchr(procname, '/')) != NULL)
 169         ptr++;
 170     else
 171         ptr = procname;
 172
 173     /*
 174      * print out what we currently know
 175      */
 176     printf("%c %5d %5d %5d %6lu %6lu %4.1f %s ",
 177       psinfo.pr_lwp.pr_sname,
 178       psinfo.pr_euid,
 179       psinfo.pr_pid,
 180       psinfo.pr_ppid,
 181       psinfo.pr_size,
 182       psinfo.pr_rssize,
 183       ((float)(psinfo.pr_pctcpu) / 0x8000 * 100.0),
 184       ptr
 185     );
 186     free(procname);
 187
 188     /*
 189      * and now for the command line stuff
 190      */
 191
 192     args_addr = psinfo.pr_argv;
 193     args_count = psinfo.pr_argc;
 194     args_vecs = malloc(args_count * sizeof(uintptr_t));
 195
 196     if(psinfo.pr_dmodel == PR_MODEL_NATIVE) {
 197       /* this process matches target process */
 198       pread(as_fd,args_vecs, args_count * sizeof(uintptr_t),
 199         args_addr);
 200     } else {
 201       /* this process is 64bit, target process is 32 bit*/
 202       caddr32_t *args_vecs32 = (caddr32_t *)args_vecs;
 203       pread(as_fd,args_vecs32,args_count * sizeof(caddr32_t),
 204         args_addr);
 205       for (i=args_count-1;i>=0;--i)
 206         args_vecs[i]=args_vecs32[i];
 207     }
 208
 209     /*
 210      * now read in the args - if what we read in fills buffer
 211      * resize buffer and reread that bit again
 212      */
 213     argslen=ARGS;
 214     args=malloc(argslen+1);
 215     for(i=0;i<args_count;i++) {
 216       memset(args,'\0',argslen+1);
 217       if(pread(as_fd, args, argslen, args_vecs[i]) <= 0) {
 218         break;
 219       }
 220       args[argslen]='\0';
 221       if(strlen(args) == argslen){
 222         argslen += ARGS;
 223         args = realloc(args, argslen + 1);
 224         i--;
 225         continue;
 226       }
 227       printf(" %s", args);
 228     }
 229     free(args_vecs);
 230     free(args);
 231     close(as_fd);
 232     printf("\n");
 233   }
 234
 235   return (0);
 236 }
 237
 238 /*----------------------------------------------------------------------------*/
 239
 240 void usage() {
 241   printf("%s: Help output\n\n", szProg);
 242   printf("If this program is given any arguments, this help is displayed.\n");
 243   printf("This command is used to print out the full command line for all\n");
 244   printf("running processes because /usr/bin/ps is limited to 80 chars and\n");
 245   printf("/usr/ucb/ps can merge columns together.\n\n");
 246   printf("Columns are:\n");
 247   printf("\tS        - State of process - see 'ps' man page\n");
 248   printf("\tUID      - UID of the process owner\n");
 249   printf("\tPID      - PID of the process\n");
 250   printf("\tPPID     - PID of the parent process\n");
 251   printf("\tVSZ      - Virtual memory usage (kilobytes)\n");
 252   printf("\tRSS      - Real memory usage (kilobytes)\n");
 253   printf("\t%%CPU     - CPU usage\n");
 254   printf("\tCOMMAND  - Command being run\n");
 255   printf("\tARGS     - Full command line with arguements\n");
 256   return;
 257 }