external/cde
1
0
Fork 0
mirror of git://git.code.sf.net/p/cdesktopenv/code synced 2025-03-09 15:50:02 +00:00
Code Issues Releases Wiki Activity

ksh93/sh.1: say that ${.sh.subshell} only counts virtual subshells

Browse source 
${.sh.subshell} only counts the nesting level of virtual (non-forked)
subshell environments relative to the current process, whether that
is the main shell environment or a real (forked) subshell.

This means ${.sh.subshell} is not sufficient to test if your code
is running in a subshell environment, so it's important to mention
this in the manual.

E.g.:
    (echo ${.sh.subshell}; ulimit -t 1; echo ${.sh.subshell}); :
outputs 1 followed by 0.

(cherry picked from commit 63dad8863fd26bf3aa4d7a1cf60b743f4169f7c4)
This commit is contained in:
Martijn Dekker 2020-05-17 10:51:27 +01:00
parent d10eab988a
commit 9f6dd1ea73
1 changed files with 3 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
src/cmd/ksh93/sh.1
View file

@ -1704,6 +1704,9 @@ discipline function is invoked.
.TP
.B .sh.subshell
The current depth for subshells and command substitution.
This value only counts the level of virtual (non-forked)
subshells and is reset to zero if and when something
requires a subshell environment to fork its own process.
.TP
.B .sh.value
Set to the value of the variable at the time that the