| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* $NetBSD: jobs.h,v 1.19 2003/11/27 21:16:14 dsl Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1991, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Kenneth Almquist. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * @(#)jobs.h 8.2 (Berkeley) 5/4/95 |
| 35 | */ |
| 36 | |
| 37 | #include "output.h" |
| 38 | |
| 39 | /* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */ |
| 40 | #define FORK_FG 0 |
| 41 | #define FORK_BG 1 |
| 42 | #define FORK_NOJOB 2 |
| 43 | |
| 44 | /* mode flags for showjob(s) */ |
| 45 | #define SHOW_PGID 0x01 /* only show pgid - for jobs -p */ |
| 46 | #define SHOW_MULTILINE 0x02 /* one line per process */ |
| 47 | #define SHOW_PID 0x04 /* include process pid */ |
| 48 | #define SHOW_CHANGED 0x08 /* only jobs whose state has changed */ |
| 49 | #define SHOW_SIGNALLED 0x10 /* only if stopped/exited on signal */ |
| 50 | #define SHOW_ISSIG 0x20 /* job was signalled */ |
| 51 | #define SHOW_NO_FREE 0x40 /* do not free job */ |
| 52 | |
| 53 | |
| 54 | /* |
| 55 | * A job structure contains information about a job. A job is either a |
| 56 | * single process or a set of processes contained in a pipeline. In the |
| 57 | * latter case, pidlist will be non-NULL, and will point to a -1 terminated |
| 58 | * array of pids. |
| 59 | */ |
| 60 | #define MAXCMDTEXT 200 |
| 61 | |
| 62 | struct procstat { |
| 63 | pid_t pid; /* process id */ |
| 64 | int status; /* last process status from wait() */ |
| 65 | char cmd[MAXCMDTEXT];/* text of command being run */ |
| 66 | }; |
| 67 | |
| 68 | struct job { |
| 69 | struct procstat ps0; /* status of process */ |
| 70 | struct procstat *ps; /* status or processes when more than one */ |
| 71 | int nprocs; /* number of processes */ |
| 72 | pid_t pgrp; /* process group of this job */ |
| 73 | char state; |
| 74 | #define JOBRUNNING 0 /* at least one proc running */ |
| 75 | #define JOBSTOPPED 1 /* all procs are stopped */ |
| 76 | #define JOBDONE 2 /* all procs are completed */ |
| 77 | char used; /* true if this entry is in used */ |
| 78 | char changed; /* true if status has changed */ |
| 79 | #if JOBS |
| 80 | char jobctl; /* job running under job control */ |
| 81 | int prev_job; /* previous job index */ |
| 82 | #endif |
| 83 | }; |
| 84 | |
| 85 | extern pid_t backgndpid; /* pid of last background process */ |
| 86 | extern int job_warning; /* user was warned about stopped jobs */ |
| 87 | |
| 88 | void setjobctl(int); |
| 89 | int fgcmd(int, char **); |
| 90 | int bgcmd(int, char **); |
| 91 | int jobscmd(int, char **); |
| 92 | void showjobs(struct output *, int); |
| 93 | int waitcmd(int, char **); |
| 94 | int jobidcmd(int, char **); |
| 95 | struct job *makejob(union node *, int); |
| 96 | int forkshell(struct job *, union node *, int); |
| 97 | void forkchild(struct job *, union node *, int, int); |
| 98 | int forkparent(struct job *, union node *, int, pid_t); |
| 99 | int waitforjob(struct job *); |
| 100 | int stoppedjobs(void); |
| 101 | void commandtext(struct procstat *, union node *); |
| 102 | int getjobpgrp(const char *); |
| 103 | |
| 104 | #if ! JOBS |
| 105 | #define setjobctl(on) /* do nothing */ |
| 106 | #endif |