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procps
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src/ps/select.c
178 строк
6 KB
Craig Small
ps: Fix table option handling and -ad
28 окт 2025, 09:11
28 окт 2025, 09:11
51bd7bf
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/* * select.c - ps process selection * * Copyright © 2011-2023 Jim Warner <james.warner@comcast.net * Copyright © 2004-2025 Craig Small <csmall@dropbear.xyz * Copyright © 1998-2002 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 <stdbool.h> #include "common.h" #define running(p) (rSv(STATE, s_ch, p) == 'R' || rSv(STATE, s_ch, p) == 'D') /* process selection flags */ static bool select_my_euid = false; static bool select_my_tty = false; static bool select_running = false; static bool select_no_leader = false; static bool select_has_tty = false; const char *select_setup(void) { /* SunOS by default will not select session leaders without the g option */ if ( (personality & PER_NO_DEFAULT_g) && !(simple_select & (SS_B_g))) select_no_leader = true; switch (simple_select) { case 0: /* The default with no selection is my euid */ select_my_euid = true; /* BSD wants any tty, non-BSD wants my TTY */ if (prefer_bsd_defaults == 1) select_has_tty = true; else select_my_tty = true; break; case SS_U_a: /* -a flag: Not session leaders, has a tty */ select_no_leader = true; select_has_tty = true; break; case SS_U_d: /* fallthrough - they are the same */ case SS_U_a | SS_U_d: /* -d or -da flags: Not session leaders */ select_no_leader = true; break; /* BSD style options */ case SS_B_a: case SS_B_a | SS_B_g: select_has_tty = true; break; case SS_B_x: case SS_B_x | SS_B_g: select_my_euid = true; break; case SS_B_a | SS_B_x: case SS_B_a | SS_B_x | SS_B_g: /* everything */ simple_select = 0; all_processes = 1; break; default: return _("process selection options conflict"); } return NULL; /* no error */ } static bool simple_accept( proc_t *p) { if (select_my_euid && rSv(ID_EUID, u_int, p) != cached_euid) return false; if (select_my_tty && rSv(TTY, s_int, p) != cached_tty) return false; if (select_running && (rSv(STATE, s_ch, p) != 'R' && rSv(STATE, s_ch, p) != 'D')) return false; if (select_no_leader && (rSv(ID_SESSION, s_int, p) == rSv(ID_TGID, s_int, p))) return false; if (select_has_tty && (rSv(TTY, s_int, p)== 0)) return false; return true; } /***** 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(simple_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; }