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- /* jobs.h -- structures and stuff used by the jobs.c file. */
-
- #include "quit.h"
-
- #if !defined (NO_WAIT_H)
- #include <sys/wait.h>
- #else
-
- #ifdef LITTLE_ENDIAN
- union wait
- {
- int w_status; /* used in syscall */
-
- /* Terminated process status. */
- struct
- {
- unsigned short
- w_Termsig : 7, /* termination signal */
- w_Coredump : 1, /* core dump indicator */
- w_Retcode : 8, /* exit code if w_termsig==0 */
- w_Fill1 : 16; /* high 16 bits unused */
- } w_T;
-
- /* Stopped process status. Returned
- only for traced children unless requested
- with the WUNTRACED option bit. */
- struct
- {
- unsigned short
- w_Stopval : 8, /* == W_STOPPED if stopped */
- w_Stopsig : 8, /* actually zero on XENIX */
- w_Fill2 : 16; /* high 16 bits unused */
- } w_S;
- };
-
- #else /* if !LITTLE_ENDIAN */
-
- /* For big-endian machines. */
-
- union wait
- {
- int w_status; /* used in syscall */
-
- /* Terminated process status. */
- struct
- {
- unsigned short w_Fill1 : 16; /* high 16 bits unused */
- unsigned w_Retcode : 8; /* exit code if w_termsig==0 */
- unsigned w_Coredump : 1; /* core dump indicator */
- unsigned w_Termsig : 7; /* termination signal */
- } w_T;
-
- /* Stopped process status. Returned
- only for traced children unless requested
- with the WUNTRACED option bit. */
- struct
- {
- unsigned short w_Fill2 : 16; /* high 16 bits unused */
- unsigned w_Stopsig : 8; /* signal that stopped us */
- unsigned w_Stopval : 8; /* == W_STOPPED if stopped */
- } w_S;
- };
-
- #endif /* LITTLE_ENDIAN */
-
- #define w_termsig w_T.w_Termsig
- #define w_coredump w_T.w_Coredump
- #define w_retcode w_T.w_Retcode
- #define w_stopval w_S.w_Stopval
- #define w_stopsig w_S.w_Stopsig
-
- #define WSTOPPED 0177
- #define WIFSTOPPED(x) (((x) . w_stopval) == WSTOPPED)
- #define WIFEXITED(x) ((! (WIFSTOPPED (x))) && (((x) . w_termsig) == 0))
- #define WIFSIGNALED(x) ((! (WIFSTOPPED (x))) && (((x) . w_termsig) != 0))
-
- #endif /* NO_WAIT_H */
-
- /* Make sure that parameters to wait3 are defined. */
- #ifndef WNOHANG
- #define WNOHANG 1
- #define WUNTRACED 2
- #endif
-
- /* I looked it up. For pretty_print_job (). The real answer is 24. */
- #define LONGEST_SIGNAL_DESC 20
-
- /* We keep an array of jobs. Each entry in the array is a linked list
- of processes that are piped together. The first process encountered is
- the group leader. */
-
- /* Each child of the shell is remembered in a STRUCT PROCESS. A chain of
- such structures is a pipeline. The chain is circular. */
- typedef struct process {
- struct process *next; /* Next process in the pipeline. A circular chain. */
- int pid; /* Process ID. */
- union wait status; /* The status of this command as returned by wait. */
- int running; /* Non-zero if this process is running. */
- char *command; /* The particular program that is running. */
- } PROCESS;
-
- /* A description of a pipeline's state. */
- typedef enum { JRUNNING, JSTOPPED, JDEAD, JMIXED } JOB_STATE;
- #define JOBSTATE(job) (jobs[(job)]->state)
-
- typedef struct job {
- char *wd; /* The working directory at time of invocation. */
- PROCESS *pipe; /* The pipeline of processes that make up this job. */
- int pgrp; /* The process ID of the process group (necessary). */
- int foreground; /* Non-zero if this is running in the foreground. */
- int notified; /* Non-zero if already notified about job state. */
- JOB_STATE state; /* The state that this job is in. */
- int job_control; /* Non-zero if this job started under job control. */
- #ifdef JOB_CONTROL
- COMMAND *deferred; /* Commands that will execute when this job is done. */
- #endif
- } JOB;
-
- #define NO_JOB -1 /* An impossible job array index. */
- #define DUP_JOB -2 /* A possible return value for get_job_spec (). */
-
- /* Stuff from the jobs.c file. */
- extern int last_made_pid;
- extern int current_job, previous_job;
- extern int asynchronous_notification;
- extern JOB **jobs;
- extern int job_slots;
-
-