| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley Software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | * |
| 6 | * @(#)proc.h 5.2 (Berkeley) %G% |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * C shell - process structure declarations |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * Structure for each process the shell knows about: |
| 15 | * allocated and filled by pcreate. |
| 16 | * flushed by pflush; freeing always happens at top level |
| 17 | * so the interrupt level has less to worry about. |
| 18 | * processes are related to "friends" when in a pipeline; |
| 19 | * p_friends links makes a circular list of such jobs |
| 20 | */ |
| 21 | struct process { |
| 22 | struct process *p_next; /* next in global "proclist" */ |
| 23 | struct process *p_friends; /* next in job list (or self) */ |
| 24 | struct directory *p_cwd; /* cwd of the job (only in head) */ |
| 25 | short unsigned p_flags; /* various job status flags */ |
| 26 | char p_reason; /* reason for entering this state */ |
| 27 | char p_index; /* shorthand job index */ |
| 28 | int p_pid; |
| 29 | int p_jobid; /* pid of job leader */ |
| 30 | /* if a job is stopped/background p_jobid gives its pgrp */ |
| 31 | struct timeval p_btime; /* begin time */ |
| 32 | struct timeval p_etime; /* end time */ |
| 33 | struct rusage p_rusage; |
| 34 | char *p_command; /* first PMAXLEN chars of command */ |
| 35 | }; |
| 36 | |
| 37 | /* flag values for p_flags */ |
| 38 | #define PRUNNING (1<<0) /* running */ |
| 39 | #define PSTOPPED (1<<1) /* stopped */ |
| 40 | #define PNEXITED (1<<2) /* normally exited */ |
| 41 | #define PAEXITED (1<<3) /* abnormally exited */ |
| 42 | #define PSIGNALED (1<<4) /* terminated by a signal != SIGINT */ |
| 43 | |
| 44 | #define PALLSTATES (PRUNNING|PSTOPPED|PNEXITED|PAEXITED|PSIGNALED|PINTERRUPTED) |
| 45 | #define PNOTIFY (1<<5) /* notify async when done */ |
| 46 | #define PTIME (1<<6) /* job times should be printed */ |
| 47 | #define PAWAITED (1<<7) /* top level is waiting for it */ |
| 48 | #define PFOREGND (1<<8) /* started in shells pgrp */ |
| 49 | #define PDUMPED (1<<9) /* process dumped core */ |
| 50 | #define PDIAG (1<<10) /* diagnostic output also piped out */ |
| 51 | #define PPOU (1<<11) /* piped output */ |
| 52 | #define PREPORTED (1<<12) /* status has been reported */ |
| 53 | #define PINTERRUPTED (1<<13) /* job stopped via interrupt signal */ |
| 54 | #define PPTIME (1<<14) /* time individual process */ |
| 55 | #define PNEEDNOTE (1<<15) /* notify as soon as practical */ |
| 56 | |
| 57 | #define PNULL (struct process *)0 |
| 58 | #define PMAXLEN 80 |
| 59 | |
| 60 | /* defines for arguments to pprint */ |
| 61 | #define NUMBER 01 |
| 62 | #define NAME 02 |
| 63 | #define REASON 04 |
| 64 | #define AMPERSAND 010 |
| 65 | #define FANCY 020 |
| 66 | #define SHELLDIR 040 /* print shell's dir if not the same */ |
| 67 | #define JOBDIR 0100 /* print job's dir if not the same */ |
| 68 | #define AREASON 0200 |
| 69 | |
| 70 | struct process proclist; /* list head of all processes */ |
| 71 | bool pnoprocesses; /* pchild found nothing to wait for */ |
| 72 | |
| 73 | struct process *pholdjob; /* one level stack of current jobs */ |
| 74 | |
| 75 | struct process *pcurrjob; /* current job */ |
| 76 | struct process *pcurrent; /* current job in table */ |
| 77 | struct process *pprevious; /* previous job in table */ |
| 78 | |
| 79 | short pmaxindex; /* current maximum job index */ |
| 80 | |
| 81 | int psigint(); |
| 82 | struct process *pgetcurr(); |
| 83 | struct process *plookup(); |
| 84 | struct process *pfind(); |