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| author | Peter Stephenson <pws@users.sourceforge.net> | 2008-09-05 21:02:08 +0000 |
|---|---|---|
| committer | Peter Stephenson <pws@users.sourceforge.net> | 2008-09-05 21:02:08 +0000 |
| commit | db31a13ecdd8306aad63319ace28bf7d029d4829 (patch) | |
| tree | e57d6287ae80fb12341a32eae7b8bc0f4d5f2711 | |
| parent | 7ce1d5735832e51bc13e255f2e8549873c9688ff (diff) | |
| download | zsh-db31a13ecdd8306aad63319ace28bf7d029d4829.tar.gz zsh-db31a13ecdd8306aad63319ace28bf7d029d4829.zip | |
25627: add $ZSH_SUBSHELL
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | Doc/Zsh/params.yo | 7 | ||||
| -rw-r--r-- | Src/exec.c | 7 | ||||
| -rw-r--r-- | Src/params.c | 4 | ||||
| -rw-r--r-- | Test/D04parameter.ztst | 15 |
5 files changed, 37 insertions, 1 deletions
@@ -1,3 +1,8 @@ +2008-09-05 Peter Stephenson <p.w.stephenson@ntlworld.com> + + * 25627: Doc/Zsh/params.yo, Src/exec.c, Src/params.c, + Test/D04parameter.ztst: add $ZSH_SUBSHELL. + 2008-09-05 Peter Stephenson <pws@csr.com> * 25615: Doc/Zsh/builtins.yo, Doc/Zsh/func.yo, Src/exec.c, diff --git a/Doc/Zsh/params.yo b/Doc/Zsh/params.yo index bf12b5ded..bc8a79450 100644 --- a/Doc/Zsh/params.yo +++ b/Doc/Zsh/params.yo @@ -731,6 +731,13 @@ item(tt(zsh_scheduled_events))( See ifzman(the section `The zsh/sched Module' in zmanref(zshmodules))\ ifnzman(noderef(The zsh/sched Module)). ) +vindex(ZSH_SUBSHELL <S>) +item(tt(ZSH_SUBSHELL))( +Readonly integer. Initially zero, incremented each time the shell forks +to create a subshell for executing code. Hence `tt((print $ZSH_SUBSHELL))' +and `tt(print $(print $ZSH_SUBSHELL))' output 1, while +`tt(( (print $ZSH_SUBSHELL) ))' outputs 2. +) vindex(ZSH_VERSION) item(tt(ZSH_VERSION))( The version number of this zsh. diff --git a/Src/exec.c b/Src/exec.c index a147dacd5..e638b9f6e 100644 --- a/Src/exec.c +++ b/Src/exec.c @@ -910,6 +910,13 @@ entersubsh(int flags) } if (!(flags & ESUB_FAKE)) subsh = 1; + /* + * Increment the visible parameter ZSH_SUBSHELL even if this + * is a fake subshell because we are exec'ing at the end. + * Logically this should be equivalent to a real subshell so + * we don't hang out the dirty washing. + */ + zsh_subshell++; if ((flags & ESUB_REVERTPGRP) && getpid() == mypgrp) release_pgrp(); if (SHTTY != -1) { diff --git a/Src/params.c b/Src/params.c index 0bd909905..39bc8515a 100644 --- a/Src/params.c +++ b/Src/params.c @@ -85,7 +85,8 @@ zlong lastval, /* $? */ lastpid, /* $! */ columns, /* $COLUMNS */ lines, /* $LINES */ - ppid; /* $PPID */ + ppid, /* $PPID */ + zsh_subshell; /* $ZSH_SUBSHELL */ /**/ zlong lineno, /* $LINENO */ zoptind, /* $OPTIND */ @@ -291,6 +292,7 @@ IPDEF4("?", &lastval), IPDEF4("HISTCMD", &curhist), IPDEF4("LINENO", &lineno), IPDEF4("PPID", &ppid), +IPDEF4("ZSH_SUBSHELL", &zsh_subshell), #define IPDEF5(A,B,F) {{NULL,A,PM_INTEGER|PM_SPECIAL},BR((void *)B),GSU(varinteger_gsu),10,0,NULL,NULL,NULL,0} IPDEF5("COLUMNS", &columns, zlevar_gsu), diff --git a/Test/D04parameter.ztst b/Test/D04parameter.ztst index 433f7743b..721396e73 100644 --- a/Test/D04parameter.ztst +++ b/Test/D04parameter.ztst @@ -1047,3 +1047,18 @@ >and !that! >of *this* >or (the|other) + + print $ZSH_SUBSHELL + (print $ZSH_SUBSHELL) + ( (print $ZSH_SUBSHELL) ) + ( (print $ZSH_SUBSHELL); print $ZSH_SUBSHELL ) + print $(print $ZSH_SUBSHELL) + cat =(print $ZSH_SUBSHELL) +0:ZSH_SUBSHELL +>0 +>1 +>2 +>2 +>1 +>1 +>1 |