/* jobs.h -- structures and stuff used by the jobs.c file. */
-/* Copyright (C) 1993 Free Software Foundation, Inc.
+/* Copyright (C) 1993-2005 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
#define PS_DONE 0
#define PS_RUNNING 1
#define PS_STOPPED 2
+#define PS_RECYCLED 4
-/* Each child of the shell is remembered in a STRUCT PROCESS. A chain of
- such structures is a pipeline. The chain is circular. */
+/* Each child of the shell is remembered in a STRUCT PROCESS. A circular
+ chain of such structures is a pipeline. */
typedef struct process {
struct process *next; /* Next process in the pipeline. A circular chain. */
pid_t pid; /* Process ID. */
char *command; /* The particular program that is running. */
} PROCESS;
+/* PALIVE really means `not exited' */
+#define PSTOPPED(p) (WIFSTOPPED((p)->status))
+#define PRUNNING(p) ((p)->running == PS_RUNNING)
+#define PALIVE(p) (PRUNNING(p) || PSTOPPED(p))
+
+#define PEXITED(p) ((p)->running == PS_DONE)
+#if defined (RECYCLES_PIDS)
+# define PRECYCLED(p) ((p)->running == PS_RECYCLED)
+#else
+# define PRECYCLED(p) (0)
+#endif
+#define PDEADPROC(p) (PEXITED(p) || PRECYCLED(p))
+
+#define get_job_by_jid(ind) (jobs[(ind)])
+
/* A description of a pipeline's state. */
typedef enum { JRUNNING, JSTOPPED, JDEAD, JMIXED } JOB_STATE;
-#define JOBSTATE(job) (jobs[(job)]->state)
+#define JOBSTATE(job) (jobs[(job)]->state)
+#define J_JOBSTATE(j) ((j)->state)
#define STOPPED(j) (jobs[(j)]->state == JSTOPPED)
#define RUNNING(j) (jobs[(j)]->state == JRUNNING)
#define DEADJOB(j) (jobs[(j)]->state == JDEAD)
+#define INVALID_JOB(j) ((j) < 0 || (j) >= js.j_jobslots || get_job_by_jid(j) == 0)
+
/* Values for the FLAGS field in the JOB struct below. */
#define J_FOREGROUND 0x01 /* Non-zero if this is running in the foreground. */
#define J_NOTIFIED 0x02 /* Non-zero if already notified about job state. */
#define J_JOBCONTROL 0x04 /* Non-zero if this job started under job control. */
#define J_NOHUP 0x08 /* Don't send SIGHUP to job if shell gets SIGHUP. */
+#define J_STATSAVED 0x10 /* A process in this job had had status saved via $! */
+#define J_ASYNC 0x20 /* Job was started asynchronously */
#define IS_FOREGROUND(j) ((jobs[j]->flags & J_FOREGROUND) != 0)
#define IS_NOTIFIED(j) ((jobs[j]->flags & J_NOTIFIED) != 0)
#define IS_JOBCONTROL(j) ((jobs[j]->flags & J_JOBCONTROL) != 0)
+#define IS_ASYNC(j) ((jobs[j]->flags & J_ASYNC) != 0)
typedef struct job {
char *wd; /* The working directory at time of invocation. */
#endif /* JOB_CONTROL */
} JOB;
+struct jobstats {
+ /* limits */
+ long c_childmax;
+ /* child process statistics */
+ int c_living; /* running or stopped child processes */
+ int c_reaped; /* exited child processes still in jobs list */
+ int c_injobs; /* total number of child processes in jobs list */
+ /* child process totals */
+ int c_totforked; /* total number of children this shell has forked */
+ int c_totreaped; /* total number of children this shell has reaped */
+ /* job counters and indices */
+ int j_jobslots; /* total size of jobs array */
+ int j_lastj; /* last (newest) job allocated */
+ int j_firstj; /* first (oldest) job allocated */
+ int j_njobs; /* number of non-NULL jobs in jobs array */
+ int j_ndead; /* number of JDEAD jobs in jobs array */
+ /* */
+ int j_current; /* current job */
+ int j_previous; /* previous job */
+ /* */
+ JOB *j_lastmade; /* last job allocated by stop_pipeline */
+ JOB *j_lastasync; /* last async job allocated by stop_pipeline */
+};
+
+struct pidstat {
+ struct pidstat *next;
+ pid_t pid;
+ int status;
+};
+
+struct bgpids {
+ struct pidstat *list;
+ struct pidstat *end;
+ int npid;
+};
+
#define NO_JOB -1 /* An impossible job array index. */
#define DUP_JOB -2 /* A possible return value for get_job_spec (). */
+#define BAD_JOBSPEC -3 /* Bad syntax for job spec. */
/* A value which cannot be a process ID. */
#define NO_PID (pid_t)-1
#endif /* !HAVE_UNISTD_H */
/* Stuff from the jobs.c file. */
+extern struct jobstats js;
+
extern pid_t original_pgrp, shell_pgrp, pipeline_pgrp;
extern pid_t last_made_pid, last_asynchronous_pid;
-extern int current_job, previous_job;
extern int asynchronous_notification;
+
extern JOB **jobs;
-extern int job_slots;
extern void making_children __P((void));
extern void stop_making_children __P((void));
extern void initialize_job_signals __P((void));
extern int give_terminal_to __P((pid_t, int));
-extern void set_sigwinch_handler __P((void));
-extern void unset_sigwinch_handler __P((void));
-
extern void unfreeze_jobs_list __P((void));
extern int set_job_control __P((int));
extern void without_job_control __P((void));
extern void ignore_tty_job_signals __P((void));
extern void default_tty_job_signals __P((void));
+extern void init_job_stats __P((void));
+
#if defined (JOB_CONTROL)
extern int job_control;
#endif
projects / platform / upstream / bash.git / blobdiff