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Atari Mega Archive 1
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Atari Mega Archive - Volume 1.iso
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mint
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shells
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bashsrc.zoo
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jobs.h
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C/C++ Source or Header
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1991-06-05
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4KB
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129 lines
/* 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;