/
githubmirror
/
procps
Обзор
Документация
Войти
/
githubmirror
/
procps
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
v4.0.2
src/ps/select.c
159 строк
6 KB
Craig Small
misc: Move all binaries to src
29 авг 2022, 11:29
29 авг 2022, 11:29
dd60d6d
Код
Авторство
О чём код?
/* * select.c - ps process selection * Copyright 1998-2002 by Albert Cahalan * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "common.h" //#define process_group_leader(p) (rSv(ID_PID, s_int, p) == rSv(ID_TGID, s_int, p)) //#define some_other_user(p) (rSv(ID_EUID, u_int, p) != cached_euid) #define has_our_euid(p) (rSv(ID_EUID, u_int, p) == cached_euid) #define on_our_tty(p) (rSv(TTY, s_int, p) == cached_tty) #define running(p) (rSv(STATE, s_ch, p) == 'R' || rSv(STATE, s_ch, p) == 'D') #define session_leader(p) (rSv(ID_SESSION, s_int, p) == rSv(ID_TGID, s_int, p)) #define without_a_tty(p) (!rSv(TTY, s_int, p)) static unsigned long select_bits = 0; /***** prepare select_bits for use */ const char *select_bits_setup(void){ int switch_val = 0; /* don't want a 'g' screwing up simple_select */ if(!simple_select && !prefer_bsd_defaults){ select_bits = 0xaa00; /* the STANDARD selection */ return NULL; } /* For every BSD but SunOS, the 'g' option is a NOP. (enabled by default) */ if( !(personality & PER_NO_DEFAULT_g) && !(simple_select&(SS_U_a|SS_U_d)) ) switch_val = simple_select|SS_B_g; else switch_val = simple_select; switch(switch_val){ /* UNIX options */ case SS_U_a | SS_U_d: select_bits = 0x3f3f; break; /* 3333 or 3f3f */ case SS_U_a: select_bits = 0x0303; break; /* 0303 or 0f0f */ case SS_U_d: select_bits = 0x3333; break; /* SunOS 4 only (others have 'g' enabled all the time) */ case 0: select_bits = 0x0202; break; case SS_B_a: select_bits = 0x0303; break; case SS_B_x : select_bits = 0x2222; break; case SS_B_x | SS_B_a: select_bits = 0x3333; break; /* General BSD options */ case SS_B_g : select_bits = 0x0a0a; break; case SS_B_g | SS_B_a: select_bits = 0x0f0f; break; case SS_B_g | SS_B_x : select_bits = 0xaaaa; break; case SS_B_g | SS_B_x | SS_B_a: /* convert to -e instead of using 0xffff */ all_processes = 1; simple_select = 0; break; default: return _("process selection options conflict"); break; } return NULL; } /***** selected by simple option? */ static int table_accept(proc_t *buf){ unsigned proc_index; proc_index = (has_our_euid(buf) <<0) | (session_leader(buf) <<1) | (without_a_tty(buf) <<2) | (on_our_tty(buf) <<3); return (select_bits & (1<<proc_index)); } /***** selected by some kind of list? */ static int proc_was_listed(proc_t *buf){ selection_node *sn = selection_list; int i; if(!sn) return 0; while(sn){ switch(sn->typecode){ default: catastrophic_failure(__FILE__, __LINE__, _("please report this bug")); #define return_if_match(foo,bar) \ i=sn->n; while(i--) \ if((unsigned)foo == (unsigned)(*(sn->u+i)).bar) \ return 1 break; case SEL_RUID: return_if_match(rSv(ID_RUID, u_int, buf),uid); break; case SEL_EUID: return_if_match(rSv(ID_EUID, u_int, buf),uid); break; case SEL_SUID: return_if_match(rSv(ID_SUID, u_int, buf),uid); break; case SEL_FUID: return_if_match(rSv(ID_FUID, u_int, buf),uid); break; case SEL_RGID: return_if_match(rSv(ID_RGID, u_int, buf),gid); break; case SEL_EGID: return_if_match(rSv(ID_EGID, u_int, buf),gid); break; case SEL_SGID: return_if_match(rSv(ID_SGID, u_int, buf),gid); break; case SEL_FGID: return_if_match(rSv(ID_FGID, u_int, buf),gid); break; case SEL_PGRP: return_if_match(rSv(ID_PGRP, s_int, buf),pid); break; case SEL_PID : return_if_match(rSv(ID_TGID, s_int, buf),pid); break; case SEL_PID_QUICK : return_if_match(rSv(ID_TGID, s_int, buf),pid); break; case SEL_PPID: return_if_match(rSv(ID_PPID, s_int, buf),ppid); break; case SEL_TTY : return_if_match(rSv(TTY, s_int, buf),tty); break; case SEL_SESS: return_if_match(rSv(ID_SESSION, s_int, buf),pid); break; case SEL_COMM: i=sn->n; while(i--) { /* special case, comm is 16 characters but match is longer */ if (strlen(rSv(CMD, str, buf)) == 15 && strlen((*(sn->u+i)).cmd) >= 15) if(!strncmp( rSv(CMD, str, buf), (*(sn->u+i)).cmd, 15 )) return 1; if(!strncmp( rSv(CMD, str, buf), (*(sn->u+i)).cmd, 63 )) return 1; } #undef return_if_match } sn = sn->next; } return 0; } /***** This must satisfy Unix98 and as much BSD as possible */ int want_this_proc(proc_t *buf){ int accepted_proc = 1; /* assume success */ /* elsewhere, convert T to list, U sets x implicitly */ /* handle -e -A */ if(all_processes) goto finish; /* use table for -a a d g x */ if((simple_select || !selection_list)) if(table_accept(buf)) goto finish; /* search lists */ if(proc_was_listed(buf)) goto finish; /* fail, fall through to loose ends */ accepted_proc = 0; /* do r N */ finish: if(running_only && !running(buf)) accepted_proc = 0; if(negate_selection) return !accepted_proc; return accepted_proc; }