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git://git.code.sf.net/p/cdesktopenv/code
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9de65210c6
This variable is like Bash's $BASHPID, but in virtual subshells
it will retain its previous value as virtual subshells don't fork.
Both $BASHPID and ${.sh.pid} are different from $$ as the latter
is only set to the parent shell's process ID (i.e. it isn't set
to the process ID of the current subshell).
src/cmd/ksh93/include/defs.h:
- Add 'current_pid' for storing the current process ID at a valid
memory address.
- Change 'ppid' from 'int32_t' to 'pid_t', as the return value from
'getppid' is of the 'pid_t' data type.
src/cmd/ksh93/data/variables.c,
src/cmd/ksh93/include/variables.h,
src/cmd/ksh93/sh/init.c,
src/cmd/ksh93/sh/xec.c:
- Add the ${.sh.pid} variable as an alternative to $BASHPID.
The process ID is stored in a struct before ${.sh.pid} is set
as environment variables are pointers that must point to a
valid memory address. ${.sh.pid} is updated by the _sh_fork()
function, which is called when ksh forks a new process with
sh_fork() or sh_ntfork().
src/cmd/ksh93/tests/variables.sh:
- Add ${.sh.pid} to the list of special variables and add three
regression tests for ${.sh.pid}.
src/cmd/ksh93/tests/subshell.sh:
- Update the PATH forking regression test to use ${.sh.pid} and
remove the TODO note.
96 lines
4.2 KiB
C
96 lines
4.2 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 SH_VALNOD
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#include <option.h>
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#include "FEATURE/options"
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#include "FEATURE/dynamic"
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/* The following defines are coordinated with data in data/variables.c */
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#define PATHNOD (shgd->bltin_nodes)
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#define PS1NOD (shgd->bltin_nodes+1)
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#define PS2NOD (shgd->bltin_nodes+2)
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#define IFSNOD (shgd->bltin_nodes+3)
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#define PWDNOD (shgd->bltin_nodes+4)
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#define HOME (shgd->bltin_nodes+5)
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#define MAILNOD (shgd->bltin_nodes+6)
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#define REPLYNOD (shgd->bltin_nodes+7)
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#define SHELLNOD (shgd->bltin_nodes+8)
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#define EDITNOD (shgd->bltin_nodes+9)
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#define MCHKNOD (shgd->bltin_nodes+10)
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#define RANDNOD (shgd->bltin_nodes+11)
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#define ENVNOD (shgd->bltin_nodes+12)
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#define HISTFILE (shgd->bltin_nodes+13)
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#define HISTSIZE (shgd->bltin_nodes+14)
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#define HISTEDIT (shgd->bltin_nodes+15)
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#define HISTCUR (shgd->bltin_nodes+16)
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#define FCEDNOD (shgd->bltin_nodes+17)
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#define CDPNOD (shgd->bltin_nodes+18)
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#define MAILPNOD (shgd->bltin_nodes+19)
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#define PS3NOD (shgd->bltin_nodes+20)
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#define OLDPWDNOD (shgd->bltin_nodes+21)
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#define VISINOD (shgd->bltin_nodes+22)
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#define COLUMNS (shgd->bltin_nodes+23)
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#define LINES (shgd->bltin_nodes+24)
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#define PPIDNOD (shgd->bltin_nodes+25)
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#define L_ARGNOD (shgd->bltin_nodes+26)
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#define TMOUTNOD (shgd->bltin_nodes+27)
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#define SECONDS (shgd->bltin_nodes+28)
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#define LINENO (shgd->bltin_nodes+29)
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#define OPTARGNOD (shgd->bltin_nodes+30)
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#define OPTINDNOD (shgd->bltin_nodes+31)
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#define PS4NOD (shgd->bltin_nodes+32)
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#define FPATHNOD (shgd->bltin_nodes+33)
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#define LANGNOD (shgd->bltin_nodes+34)
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#define LCALLNOD (shgd->bltin_nodes+35)
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#define LCCOLLNOD (shgd->bltin_nodes+36)
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#define LCTYPENOD (shgd->bltin_nodes+37)
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#define LCMSGNOD (shgd->bltin_nodes+38)
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#define LCNUMNOD (shgd->bltin_nodes+39)
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#define FIGNORENOD (shgd->bltin_nodes+40)
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#define VERSIONNOD (shgd->bltin_nodes+41)
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#define JOBMAXNOD (shgd->bltin_nodes+42)
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#define DOTSHNOD (shgd->bltin_nodes+43)
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#define ED_CHRNOD (shgd->bltin_nodes+44)
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#define ED_COLNOD (shgd->bltin_nodes+45)
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#define ED_TXTNOD (shgd->bltin_nodes+46)
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#define ED_MODENOD (shgd->bltin_nodes+47)
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#define SH_NAMENOD (shgd->bltin_nodes+48)
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#define SH_SUBSCRNOD (shgd->bltin_nodes+49)
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#define SH_VALNOD (shgd->bltin_nodes+50)
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#define SH_VERSIONNOD (shgd->bltin_nodes+51)
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#define SH_DOLLARNOD (shgd->bltin_nodes+52)
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#define SH_MATCHNOD (shgd->bltin_nodes+53)
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#define SH_COMMANDNOD (shgd->bltin_nodes+54)
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#define SH_PATHNAMENOD (shgd->bltin_nodes+55)
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#define SH_FUNNAMENOD (shgd->bltin_nodes+56)
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#define SH_SUBSHELLNOD (shgd->bltin_nodes+57)
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#define SH_LEVELNOD (shgd->bltin_nodes+58)
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#define SH_LINENO (shgd->bltin_nodes+59)
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#define SH_STATS (shgd->bltin_nodes+60)
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#define SH_MATHNOD (shgd->bltin_nodes+61)
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#define SH_JOBPOOL (shgd->bltin_nodes+62)
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#define SH_PIDNOD (shgd->bltin_nodes+63)
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#define SHLVL (shgd->bltin_nodes+64)
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#endif /* SH_VALNOD */
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