fix in commitid 100576F1D4100EFF065
** Changed in: mksh
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1380389
Title:
x=<< functionality cannot be used in functions
Status in mksh:
Fix Committed
Bug description:
Several bugs with this construct:
x=<<EOF
foo
EOF
x+=<<
foo
<<
1. It cannot be used in functions: assignment is done at parse time
2. It uses ATEMP of parse time, which is gone at runtime in functions
⇒ hides first bug unless exec.c alloc(z * 2 + n, ATEMP) → APERM
3. Size calculations not fully checked, one too big
⇒ (z-1) * 2 + 1 /* EOS */ + n
Ad 1:
(sid-amd64)tglase@tglase:~/b $ ./mksh ~/x
a
abla5424 bar
abla5424 bar bla5424 bar
function bar {
x+=\b\l\a\5\4\2\4\ \b\a\r\
}
(sid-amd64)tglase@tglase:~/b $ cat ~/x
function bar {
x+=<<
bla$RANDOM bar
<<
}
x=a
echo $x
bar
echo $x
bar
echo $x
typeset -f bar
Substitution happens at first use:
(sid-amd64)tglase@tglase:~/b $ ./mksh ~/x2
function bar {
x=<<
bla$RANDOM bar
<<
}
function bar {
x=\b\l\a\1\2\2\8\1\ \b\a\r\
}
(sid-amd64)tglase@tglase:~/b $ /bin/mksh ~/x2
function bar {
x=<<
bla$RANDOM bar
<<
}
function bar {
x=\b\l\a\2\6\7\7\9\ \b\a\r\
}
(sid-amd64)tglase@tglase:~/b $ cat ~/x2
function bar {
x=<<
bla$RANDOM bar
<<
}
typeset -f bar
bar
typeset -f bar
So this is even worse than thought, the ATEMP context is the one from
the first use of the function…
This was introduced in R40, when the x=<< syntax was added.
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