1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)jobs.h 8.2 (Berkeley) 05/04/95 11 */ 12 13 /* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */ 14 #define FORK_FG 0 15 #define FORK_BG 1 16 #define FORK_NOJOB 2 17 18 19 /* 20 * A job structure contains information about a job. A job is either a 21 * single process or a set of processes contained in a pipeline. In the 22 * latter case, pidlist will be non-NULL, and will point to a -1 terminated 23 * array of pids. 24 */ 25 26 struct procstat { 27 short pid; /* process id */ 28 short status; /* status flags (defined above) */ 29 char *cmd; /* text of command being run */ 30 }; 31 32 33 /* states */ 34 #define JOBSTOPPED 1 /* all procs are stopped */ 35 #define JOBDONE 2 /* all procs are completed */ 36 37 38 struct job { 39 struct procstat ps0; /* status of process */ 40 struct procstat *ps; /* status or processes when more than one */ 41 short nprocs; /* number of processes */ 42 short pgrp; /* process group of this job */ 43 char state; /* true if job is finished */ 44 char used; /* true if this entry is in used */ 45 char changed; /* true if status has changed */ 46 #if JOBS 47 char jobctl; /* job running under job control */ 48 #endif 49 }; 50 51 extern short backgndpid; /* pid of last background process */ 52 extern int job_warning; /* user was warned about stopped jobs */ 53 54 void setjobctl __P((int)); 55 int fgcmd __P((int, char **)); 56 int bgcmd __P((int, char **)); 57 int jobscmd __P((int, char **)); 58 void showjobs __P((int)); 59 int waitcmd __P((int, char **)); 60 int jobidcmd __P((int, char **)); 61 struct job *makejob __P((union node *, int)); 62 int forkshell __P((struct job *, union node *, int)); 63 int waitforjob __P((struct job *)); 64 int stoppedjobs __P((void)); 65 char *commandtext __P((union node *)); 66 67 #if ! JOBS 68 #define setjobctl(on) /* do nothing */ 69 #endif 70