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git://git.code.sf.net/p/cdesktopenv/code
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3613da4240
The coshell(1) command, which is required for libcoshell to be
useful, is not known to be shipped by any distribution. It was
removed by the ksh-community fork and hence also by 93u+m (in
2940b3f5). The coshell facility as a whole is obsolete and
insecure. For a long time now, the statically linked libcoshell
library has been 40+ kilobytes of dead weight in the ksh binary.
Prior discussion (ksh2020): https://github.com/att/ast/issues/619
src/lib/libcoshell/*:
- Removed.
src/cmd/ksh93/*:
- Remove the SHOPT_COSHELL compiler option (which was enabled) and
a lot of code that was conditional upon #ifdef SHOPT_COSHELL.
- init.c: e_version[]: Removing SHOPT_COSHELL changed the "J"
feature identifier in ${.sh.version} to a lowercase "j", which
was conditional upon SHOPT_BGX (background job extensions).
But src/cmd/ksh93/RELEASE documents (at 08-12-04, on line 1188):
| +SHOPT_BGX enables background job extensions. Noted by "J" in
| the version string when enabled. [...]
That is the only available documentation. So change that "j" back
to a "J", leaving the version string unchanged after this commit.
- jobs.c: job_walk(): We need to keep one 'job_waitsafe(SIGCHLD);'
call that was conditional upon SHOPT_COSHELL; removing it caused
a regression test failure in tests/sigchld.sh, 'SIGCHLD blocked
for script at end of pipeline' (which means that until now, a ksh
compiled without libcoshell had broken SIGCHLD handling.)
bin/package, src/cmd/INIT/package.sh:
- Don't export COSHELL variable.
194 lines
5.7 KiB
C
194 lines
5.7 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1982-2011 AT&T Intellectual Property *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* David Korn <dgk@research.att.com> *
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* *
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***********************************************************************/
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#pragma prototyped
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#ifndef JOB_NFLAG
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/*
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* Interface to job control for shell
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* written by David Korn
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*
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*/
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#define JOBTTY 2
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#include <ast.h>
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#include <sfio.h>
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#ifndef SIGINT
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# include <signal.h>
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#endif /* !SIGINT */
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#include "FEATURE/options"
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#undef JOBS
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#if defined(SIGCLD) && !defined(SIGCHLD)
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# define SIGCHLD SIGCLD
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#endif
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#ifdef SIGCHLD
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# define JOBS 1
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# include "terminal.h"
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# ifdef FIOLOOKLD
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/* Ninth edition */
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extern int tty_ld, ntty_ld;
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# define OTTYDISC tty_ld
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# define NTTYDISC ntty_ld
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# endif /* FIOLOOKLD */
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#else
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# undef SIGTSTP
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# undef SH_MONITOR
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# define SH_MONITOR 0
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# define job_set(x)
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# define job_reset(x)
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#endif
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struct process
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{
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struct process *p_nxtjob; /* next job structure */
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struct process *p_nxtproc; /* next process in current job */
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Shell_t *p_shp; /* shell that posted the job */
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int *p_exitval; /* place to store the exitval */
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pid_t p_pid; /* process id */
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pid_t p_pgrp; /* process group */
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pid_t p_fgrp; /* process group when stopped */
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short p_job; /* job number of process */
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unsigned short p_exit; /* exit value or signal number */
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unsigned short p_exitmin; /* minimum exit value for xargs */
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unsigned short p_flag; /* flags - see below */
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int p_env; /* subshell environment number */
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#ifdef JOBS
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off_t p_name; /* history file offset for command */
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struct termios p_stty; /* terminal state for job */
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#endif /* JOBS */
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};
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struct jobs
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{
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struct process *pwlist; /* head of process list */
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int *exitval; /* pipe exit values */
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pid_t curpgid; /* current process gid id */
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pid_t parent; /* set by fork() */
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pid_t mypid; /* process id of shell */
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pid_t mypgid; /* process group id of shell */
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pid_t mytgid; /* terminal group id of shell */
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int curjobid;
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unsigned int in_critical; /* >0 => in critical region */
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int savesig; /* active signal */
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int numpost; /* number of posted jobs */
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#ifdef SHOPT_BGX
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int numbjob; /* number of background jobs */
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#endif /* SHOPT_BGX */
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short fd; /* tty descriptor number */
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#ifdef JOBS
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int suspend; /* suspend character */
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int linedisc; /* line discipline */
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#endif /* JOBS */
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char jobcontrol; /* turned on for real job control */
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char waitsafe; /* wait will not block */
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char waitall; /* wait for all jobs in pipe */
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char toclear; /* job table needs clearing */
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unsigned char *freejobs; /* free jobs numbers */
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};
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/* flags for joblist */
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#define JOB_LFLAG 1
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#define JOB_NFLAG 2
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#define JOB_PFLAG 4
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#define JOB_NLFLAG 8
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extern struct jobs job;
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#ifdef JOBS
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#if !_std_malloc
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#include <vmalloc.h>
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#ifdef vmlocked
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#define vmbusy() vmlocked(Vmregion)
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#else
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#if VMALLOC_VERSION >= 20070911L
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#define vmbusy() (vmstat(0,0)!=0)
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#endif
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#endif
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#endif
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#ifndef vmbusy
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#define vmbusy() 0
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#endif
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#define job_lock() (job.in_critical++)
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#define job_unlock() \
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do { \
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int sig; \
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if (!--job.in_critical && (sig = job.savesig)) \
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{ \
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if (!job.in_critical++ && !vmbusy()) \
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job_reap(sig); \
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job.in_critical--; \
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} \
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} while(0)
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extern const char e_jobusage[];
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extern const char e_done[];
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extern const char e_running[];
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extern const char e_coredump[];
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extern const char e_no_proc[];
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extern const char e_no_job[];
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extern const char e_badpid[];
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extern const char e_jobsrunning[];
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extern const char e_nlspace[];
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extern const char e_access[];
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extern const char e_terminate[];
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extern const char e_no_jctl[];
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extern const char e_signo[];
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#ifdef SIGTSTP
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extern const char e_no_start[];
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#endif /* SIGTSTP */
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#ifdef NTTYDISC
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extern const char e_newtty[];
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extern const char e_oldtty[];
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#endif /* NTTYDISC */
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#endif /* JOBS */
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/*
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* The following are defined in jobs.c
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*/
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extern void job_clear(void);
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extern void job_bwait(char**);
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extern int job_walk(Sfio_t*,int(*)(struct process*,int),int,char*[]);
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extern int job_kill(struct process*,int);
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extern int job_wait(pid_t);
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extern int job_post(Shell_t*,pid_t,pid_t);
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extern void *job_subsave(void);
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extern void job_subrestore(void*);
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#ifdef SHOPT_BGX
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extern void job_chldtrap(Shell_t*, const char*,int);
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#endif /* SHOPT_BGX */
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#ifdef JOBS
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extern void job_init(Shell_t*,int);
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extern int job_close(Shell_t*);
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extern int job_list(struct process*,int);
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extern int job_terminate(struct process*,int);
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extern int job_switch(struct process*,int);
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extern void job_fork(pid_t);
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extern int job_reap(int);
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#else
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# define job_init(s,flag)
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# define job_close(s) (0)
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# define job_fork(p)
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#endif /* JOBS */
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#endif /* !JOB_NFLAG */
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