/* Show process information. Copyright (C) 1995,96,97,98,99,2002,2006 Free Software Foundation, Inc. Written by Miles Bader 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 2, 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, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "psout.h" #include "parse.h" #include "pids.h" const char *argp_program_version = STANDARD_HURD_VERSION (ps); #define OA OPTION_ARG_OPTIONAL static const struct argp_option options[] = { {0,0,0,0, "Output format selection:", 1}, {"format", 'F', "FMT", 0, "Use the output-format FMT; FMT may be" " `default', `user', `vmem', `long'," " `jobc', `full', `hurd', `hurd-long'," " or a custom format-string"}, {"posix-format",'o', "FMT", 0, "Use the posix-style output-format FMT"}, {0, 'f', 0, 0, "Use the `full' output-format"}, {0, 'j', 0, 0, "Use the `jobc' output-format"}, {0, 'l', 0, 0, "Use the `long' output-format"}, {0, 'u', 0, 0, "Use the `user' output-format"}, {0, 'v', 0, 0, "Use the `vmem' output-format"}, {0,0,0,0, "Process filtering (by default, other users'" " processes, threads, and process-group leaders are not shown):", 2}, {"all-users", 'a', 0, 0, "List other users' processes"}, {0, 'd', 0, 0, "List all processes except process group" " leaders"}, {"all", 'e', 0, 0, "List all processes"}, {0, 'A', 0, OPTION_ALIAS}, /* Posix option meaning -e */ {0, 'g', 0, 0, "Include session and login leaders"}, {"owner", 'U', "USER", 0, "Show only processes owned by USER"}, {"not-owner", 'O', "USER", 0, "Show only processes not owned by USER"}, {"no-parent", 'P', 0, 0, "Include processes without parents"}, {"threads", 'T', 0, 0, "Show the threads for each process"}, {"tty", 't', "TTY", OA, "Only show processes with controlling" " terminal TTY"}, {0, 'x', 0, 0, "Include orphaned processes"}, {0,0,0,0, "Elision of output fields:", 4}, {"no-msg-port",'M', 0, 0, "Don't show info that uses a process's" " msg port"}, {"nominal-fields",'n', 0, 0, "Don't elide fields containing" " `uninteresting' data"}, {"all-fields", 'Q', 0, 0, "Don't elide unusable fields (normally" " if there's some reason ps can't print" " a field for any process, it's removed" " from the output entirely)"}, {0,0,0,0, "Output attributes:"}, {"no-header", 'H', 0, 0, "Don't print a descriptive header line"}, {"reverse", 'r', 0, 0, "Reverse the order of any sort"}, {"sort", 's', "FIELD",0, "Sort the output with respect to FIELD," " backwards if FIELD is prefixed by `-'"}, {"top", 'h', "ENTRIES", OA, "Show the top ENTRIES processes" " (default 10), or if ENTRIES is" " negative, the bottom -ENTRIES"}, {"head", 0, 0, OPTION_ALIAS}, {"bottom", 'b', "ENTRIES", OA, "Show the bottom ENTRIES processes" " (default 10)"}, {"tail", 0, 0, OPTION_ALIAS}, {"width", 'w', "WIDTH",OA, "If WIDTH is given, try to format the" " output for WIDTH columns, otherwise," " remove the default limit"}, {0, 0} }; static const char doc[] = "Show information about processes PID... (default all `interesting' processes)" "\vThe USER, LID, PID, PGRP, and SID arguments may also be comma separated" " lists. The System V options -u and -g may be accessed with -O and -G."; #define FILTER_OWNER 0x01 #define FILTER_NOT_LEADER 0x02 #define FILTER_CTTY 0x04 #define FILTER_UNORPHANED 0x08 #define FILTER_PARENTED 0x10 /* A particular predefined output format. */ struct output_fmt { const char *name; const char *sort_key; /* How this format should be sorted. */ const char *fmt; /* The format string. */ }; /* The predefined output formats. */ struct output_fmt output_fmts[] = { { "default", "pid", "%^%?user %pid %th %tt %sc %stat %time %command" }, { "user", "-cpu", "%^%user %pid %th %cpu %mem %sz %rss %tt %sc %stat %start %time %command" }, { "vmem", "-mem", "%^%pid %th %stat %sl %pgins %pgflts %cowflts %zfills %sz %rss %cpu %mem %command" }, { "long", "pid", "%^%uid %pid %th %ppid %pri %ni %nth %msgi %msgo %sz %rss %sc %wait %stat %tt %time %command" }, { "jobc", "pid", "%^%user %pid %th %ppid %pgrp %sess %lcoll %sc %stat %tt %time %command" }, { "full", "pid", "%^%-user %pid %ppid %tty %time %command" }, { "hurd", "pid", "%pid %th %uid %nth %{vsize:Vmem} %rss %{utime:User} %{stime:System} %args" }, { "hurd-long", "pid", "%pid %th %uid %ppid %pgrp %sess %nth %{vsize:Vmem} %rss %cpu %{utime:User} %{stime:System} %args" } }; /* Augment the standard specs with our own abbrevs. */ static const struct ps_fmt_spec spec_abbrevs[] = { {"TT=tty"}, {"SC=susp"}, {"Stat=state"}, {"Command=args"}, {"SL=sleep"}, {"NTH=nth", "TH"}, {"NI=bpri"}, {"SZ=vsize"}, {"RSS=rsize"}, {"MsgI=msgin"}, {"MsgO=msgout"}, {0} }; static struct ps_fmt_specs ps_specs = { spec_abbrevs, &ps_std_fmt_specs }; /* Returns the UID for the user called NAME. */ static int lookup_user (const char *name, struct argp_state *state) { struct passwd *pw = getpwnam(name); if (pw == NULL) argp_failure (state, 2, 0, "%s: Unknown user", name); return pw->pw_uid; } int main(int argc, char *argv[]) { error_t err; /* A buffer used for rewriting old-style ps command line arguments that need a dash prepended for the parser to understand them. It gets realloced for each successive arg that needs it, on the assumption that args don't get parsed multiple times. */ char *arg_hack_buf = 0; struct idvec *only_uids = make_idvec (), *not_uids = make_idvec (); char *tty_names = 0; size_t num_tty_names = 0; struct proc_stat_list *procset; struct ps_context *context; const char *fmt_string = "default", *sort_key_name = NULL; unsigned filter_mask = FILTER_OWNER | FILTER_NOT_LEADER | FILTER_UNORPHANED | FILTER_PARENTED; int sort_reverse = FALSE, print_heading = TRUE; int squash_bogus_fields = TRUE, squash_nominal_fields = TRUE; int show_threads = FALSE, no_msg_port = FALSE; int output_width = -1; /* Desired max output size. */ int show_non_hurd_procs = 1; /* Show non-hurd processes. */ int posix_fmt = 0; /* Use a posix_fmt-style format string. */ int top = 0; /* Number of entries to output. */ pid_t *pids = 0; /* User-specified pids. */ size_t num_pids = 0; struct pids_argp_params pids_argp_params = { &pids, &num_pids, 1 }; /* Add a user who's processes should be printed out. */ error_t add_uid (uid_t uid, struct argp_state *state) { error_t err = idvec_add (only_uids, uid); if (err) argp_failure (state, 23, err, "Can't add uid"); return err; } /* Add a user who's processes should not be printed out. */ error_t add_not_uid (uid_t uid, struct argp_state *state) { error_t err = idvec_add (not_uids, uid); if (err) argp_failure (state, 23, err, "Can't add uid"); return err; } /* Returns TRUE if PS is owned by any of the users in ONLY_UIDS, and none in NOT_UIDS. */ int proc_stat_owner_ok(struct proc_stat *ps) { int uid = proc_stat_owner_uid (ps); if (only_uids->num > 0 && !idvec_contains (only_uids, uid)) return 0; if (not_uids->num > 0 && idvec_contains (not_uids, uid)) return 0; return 1; } /* Add TTY_NAME to the list for which processes with those controlling terminals will be printed. */ error_t add_tty_name (const char *tty_name, struct argp_state *state) { error_t err = argz_add (&tty_names, &num_tty_names, tty_name); if (err) argp_failure (state, 8, err, "%s: Can't add tty", tty_name); return err; } int proc_stat_has_ctty(struct proc_stat *ps) { if (proc_stat_has(ps, PSTAT_TTY)) /* Only match processes whose tty we can figure out. */ { struct ps_tty *tty = proc_stat_tty (ps); if (tty) { char *try = 0; const char *name = ps_tty_name (tty); const char *short_name = ps_tty_short_name(tty); while ((try = argz_next (tty_names, num_tty_names, try))) if ((name && strcmp (try, name) == 0) || (short_name && strcmp (try, short_name) == 0)) return TRUE; } } return FALSE; } /* Returns the name of the current controlling terminal. */ const char *current_tty_name() { error_t err; struct ps_tty *tty; mach_port_t cttyid = getcttyid(); if (cttyid == MACH_PORT_NULL) error(2, 0, "No controlling terminal"); err = ps_context_find_tty_by_cttyid (context, cttyid, &tty); if (err) error(2, err, "Can't get controlling terminal"); return ps_tty_name (tty); } error_t parse_opt (int key, char *arg, struct argp_state *state) { switch (key) { case ARGP_KEY_ARG: /* Non-option argument. */ if (!isdigit (*arg) && !state->quoted) /* Old-fashioned `ps' syntax takes options without the leading dash. Prepend a dash and feed back to getopt. */ { size_t len = strlen (arg) + 1; arg_hack_buf = realloc (arg_hack_buf, 1 + len); state->argv[--state->next] = arg_hack_buf; state->argv[state->next][0] = '-'; memcpy (&state->argv[state->next][1], arg, len); break; } else /* Let PIDS_ARGP handle it. */ return ARGP_ERR_UNKNOWN; case 'a': filter_mask &= ~FILTER_OWNER; break; case 'd': filter_mask &= ~(FILTER_OWNER | FILTER_UNORPHANED); break; case 'e': case 'A': filter_mask = 0; break; case 'g': filter_mask &= ~FILTER_NOT_LEADER; break; case 'x': filter_mask &= ~FILTER_UNORPHANED; break; case 'P': filter_mask &= ~FILTER_PARENTED; break; case 'f': fmt_string = "full"; break; case 'u': fmt_string = "user"; break; case 'v': fmt_string = "vmem"; break; case 'j': fmt_string = "jobc"; break; case 'l': fmt_string = "long"; break; case 'M': no_msg_port = TRUE; break; case 'H': print_heading = FALSE; break; case 'Q': squash_bogus_fields = squash_nominal_fields = FALSE; break; case 'n': squash_nominal_fields = FALSE; break; case 'T': show_threads = TRUE; break; case 's': sort_key_name = arg; break; case 'r': sort_reverse = TRUE; break; case 'h': top = arg ? atoi (arg) : 10; break; case 'b': top = -(arg ? atoi (arg) : 10); break; case 'F': fmt_string = arg; posix_fmt = 0; break; case 'o': fmt_string = arg; posix_fmt = 1; break; case 'w': output_width = arg ? atoi (arg) : 0; /* 0 means `unlimited'. */ break; case 't': return parse_strlist (arg, add_tty_name, current_tty_name, "tty", state); case 'U': return parse_numlist (arg, add_uid, NULL, lookup_user, "user", state); case 'O': return parse_numlist (arg, add_not_uid, NULL, lookup_user, "user", state); case ARGP_KEY_INIT: /* Initialize inputs for child parsers. */ state->child_inputs[0] = &pids_argp_params; break; case ARGP_KEY_SUCCESS: /* Select an explicit format string if FMT_STRING is a format name. This is done here because parse_enum needs STATE. */ { if (posix_fmt) break; const char *fmt_name (unsigned n) { return n >= (sizeof output_fmts / sizeof *output_fmts) ? 0 : output_fmts[n].name; } int fmt_index = parse_enum (fmt_string, fmt_name, "format type", 1, state); if (fmt_index >= 0) { fmt_string = output_fmts[fmt_index].fmt; if (sort_key_name == NULL) sort_key_name = output_fmts[fmt_index].sort_key; } } break; default: return ARGP_ERR_UNKNOWN; } return 0; } struct argp_child argp_kids[] = { { &pids_argp, 0, "Process selection (before filtering; default is all processes):", 3}, {0} }; struct argp argp = { options, parse_opt, 0, doc, argp_kids }; err = ps_context_create (getproc (), &context); if (err) error(1, err, "ps_context_create"); /* Parse our command line. This shouldn't ever return an error. */ argp_parse (&argp, argc, argv, 0, 0, 0); err = proc_stat_list_create(context, &procset); if (err) error(1, err, "proc_stat_list_create"); if (num_pids == 0) /* No explicit processes specified. */ { err = proc_stat_list_add_all (procset, 0, 0); /* Try to avoid showing non-hurd processes if this isn't a native-booted hurd system (because there would be lots of them). Here we use a simple heuristic: Is the 5th process a hurd process (1-4 are typically: proc server, init, kernel, boot default pager (maybe); the last two are know not to be hurd processes)? */ if (procset->num_procs > 4) { struct proc_stat *ps = procset->proc_stats[4]; if (proc_stat_set_flags (ps, PSTAT_STATE) == 0 && (ps->flags & PSTAT_STATE)) show_non_hurd_procs = !(ps->state & PSTAT_STATE_P_NOPARENT); else /* Something is fucked, we can't get the state bits for PS. Default to showing everything. */ show_non_hurd_procs = 1; } } else /* User-specified processes. */ { err = proc_stat_list_add_pids (procset, pids, num_pids, 0); filter_mask = 0; /* Don't mess with them. */ } if (err) error(2, err, "Can't get process list"); if (no_msg_port) proc_stat_list_set_flags(procset, PSTAT_NO_MSGPORT); if (only_uids->num == 0 && (filter_mask & FILTER_OWNER)) /* Restrict the output to only our own processes. */ { int uid = getuid (); if (uid >= 0) add_uid (uid, 0); else filter_mask &= ~FILTER_OWNER; /* Must be an anonymous process. */ } /* Filter out any processes that we don't want to show. */ if (only_uids->num || not_uids->num) proc_stat_list_filter1 (procset, proc_stat_owner_ok, PSTAT_OWNER_UID, FALSE); if (num_tty_names > 0) { /* We set the PSTAT_TTY flag separately so that our filter function can look at any procs that fail to set it. */ proc_stat_list_set_flags(procset, PSTAT_TTY); proc_stat_list_filter1(procset, proc_stat_has_ctty, 0, FALSE); } if (filter_mask & FILTER_NOT_LEADER) proc_stat_list_filter (procset, &ps_not_leader_filter, FALSE); if (filter_mask & FILTER_UNORPHANED) proc_stat_list_filter (procset, &ps_unorphaned_filter, FALSE); if (!show_non_hurd_procs && (filter_mask & FILTER_PARENTED)) proc_stat_list_filter (procset, &ps_parent_filter, FALSE); if (show_threads) proc_stat_list_add_threads(procset); proc_stat_list_filter (procset, &ps_alive_filter, FALSE); psout (procset, fmt_string, posix_fmt, &ps_specs, sort_key_name, sort_reverse, output_width, print_heading, squash_bogus_fields, squash_nominal_fields, top); return 0; }