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- /* jobs.h -- structures and stuff used by the jobs.c file. */
- #include "quit.h"
-
- /* Defines controlling the fashion in which jobs are listed. */
- #define JLIST_STANDARD 0
- #define JLIST_LONG 1
- #define JLIST_PID_ONLY 2
- #define JLIST_CHANGED_ONLY 3
-
- /* Cadmus machines are brain-dead from the moment of fission, like all
- bacteria. */
- #if defined (cadmus) || defined (BrainDeath)
- # undef HAVE_WAIT_H
- #endif /* BrainDeath */
-
- /* HP/UX 6.x sys/wait.h is a complete loss when it comes to the WIF macros.
- Pretend we don't have a wait.h. */
- #if defined (hpux) && !defined (_POSIX_VERSION)
- #undef HAVE_WAIT_H
- #endif
-
- #if defined (HAVE_WAIT_H)
- #include <sys/wait.h>
- #else
-
- #include "endian.h"
-
- #if !defined (_POSIX_VERSION)
- #if defined (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 */
-
- /* This is for big-endian machines like the IBM RT, HP 9000, or Sun-3 */
-
- 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
-
- /* Note that sys/wait.h defines these for Posix systems. */
- #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 /* _POSIX_VERSION */
- #endif /* !HAVE_WAIT_H */
-
- #if !defined (_POSIX_VERSION)
- #define pid_t int
- typedef union wait WAIT;
- #else
- typedef int WAIT;
- #endif /* _POSIX_VERSION */
-
- /* How to get the status of a job. For Posix, this is just an int, but for
- other systems we have to crack the union wait. */
- #if defined (_POSIX_VERSION)
- #define WSTATUS(t) (t)
- #else
- #define WSTATUS(t) (t.w_status)
- #endif
-
- /* Make sure that parameters to wait3 are defined. */
- #if !defined (WNOHANG)
- #define WNOHANG 1
- #define WUNTRACED 2
- #endif /* WNOHANG */
-
- /* More Posix P1003.1 definitions. In these definitions, `s' is a
- `union wait' (the 1003.1 spec says they are `int'). */
- #if !defined (WSTOPSIG)
- #define WSTOPSIG(s) ((s).w_stopsig)
- #define WTERMSIG(s) ((s).w_termsig)
- #define WEXITSTATUS(s) ((s).w_retcode)
- #endif /* WSTOPSIG */
-
- #if !defined (WIFCORED)
- #if !defined (_POSIX_VERSION)
- #define WIFCORED(s) ((s).w_coredump)
- #else
- #define WIFCORED(s) ((s) & 0200)
- #endif /* _POSIX_VERSION */
- #endif /* WIFCORED */
-
- /* I looked it up. For pretty_print_job (). The real answer is 24. */
- #define LONGEST_SIGNAL_DESC 24
-
- /* 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. */
- pid_t pid; /* Process ID. */
- 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. */
- pid_t 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 (). */
-
- /* A value which cannot be a process ID. */
- #define NO_PID (pid_t)-1
-
- #if !defined (_POSIX_VERSION) && !defined (sigmask)
- #define sigmask(x) (1 << ((x)-1))
- #endif /* !POSIX && !sigmask */
-
- #ifndef SIGABRT
- #define SIGABRT SIGIOT
- #endif
-
- #ifndef SIGCHLD
- #define SIGCHLD SIGCLD
- #endif
-
- #if !defined (_POSIX_VERSION)
- #if !defined (SIG_BLOCK)
- #define SIG_BLOCK 2
- #define SIG_SETMASK 3
- #endif /* SIG_BLOCK */
-
- /* Type of a signal set. */
- #define sigset_t int
-
- /* Make sure there is nothing inside the signal set. */
- #define sigemptyset(set) (*(set) = 0)
-
- /* Add SIG to the contents of SET. */
- #define sigaddset(set, sig) *(set) |= sigmask (sig)
-
- /* Suspend the process until the reception of one of the signals
- not present in SET. */
- #define sigsuspend(set) sigpause (*(set))
-
- /* END of POSIX 1003.1 definitions. */
- #endif /* _POSIX_VERSION */
-
- /* These definitions are used both in POSIX and non-POSIX implementations. */
-
- #define BLOCK_SIGNAL(sig, nvar, ovar) \
- sigemptyset (&nvar); \
- sigaddset (&nvar, sig); \
- sigemptyset (&ovar); \
- sigprocmask (SIG_BLOCK, &nvar, &ovar)
-
- #if defined (_POSIX_VERSION)
- #define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar)
- #define UNBLOCK_CHILD(ovar) sigprocmask (SIG_SETMASK, &ovar, (sigset_t *) NULL)
- #else /* !_POSIX_VERSION */
- #define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD))
- #define UNBLOCK_CHILD(ovar) sigsetmask (ovar)
- #endif /* !_POSIX_VERSION */
-
- /* System calls. */
- extern pid_t fork (), getpid (), getpgrp ();
-
- /* Stuff from the jobs.c file. */
- extern pid_t original_pgrp, shell_pgrp, pipeline_pgrp;
- extern pid_t last_made_pid, last_asynchronous_pid, make_child ();
- extern int current_job, previous_job;
- extern int asynchronous_notification;
- extern JOB **jobs;
- extern int job_slots;
-