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[PATCH] make TERMINFO_DIRS variable special



---
 Doc/Zsh/params.yo | 15 +++++++++++----
 Src/params.c      | 31 +++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/Doc/Zsh/params.yo b/Doc/Zsh/params.yo
index c7d84b9..728fc21 100644
--- a/Doc/Zsh/params.yo
+++ b/Doc/Zsh/params.yo
@@ -1485,10 +1485,17 @@ take effect.
 )
 vindex(TERMINFO)
 item(tt(TERMINFO) <S>)(
-A reference to a compiled description of the terminal, used by the
-`terminfo' library when the system has it; see manref(terminfo)(5).
-If set, this causes the shell to reinitialise the terminal, making
-the workaround `tt(TERM=$TERM)' unnecessary.
+A reference to a directory containing the compiled description of
+terminals, used by the `terminfo' library when the system has it; see
+manref(terminfo)(5).  If set, this causes the shell to reinitialise the
+terminal, making the workaround `tt(TERM=$TERM)' unnecessary.
+)
+vindex(TERMINFO_DIRS)
+item(tt(TERMINFO_DIRS) <S>)(
+An array (colon-separated list) of paths to be searched for a compiled
+description of the terminal, used by the `terminfo' library when the system has
+it; see manref(terminfo)(5).  If set, this causes the shell to reinitialise the
+terminal, making the workaround `tt(TERM=$TERM)' unnecessary.
 )
 vindex(TIMEFMT)
 item(tt(TIMEFMT))(
diff --git a/Src/params.c b/Src/params.c
index 19a8c29..92b8ac1 100644
--- a/Src/params.c
+++ b/Src/params.c
@@ -87,6 +87,7 @@ char *ifs,		/* $IFS         */
      *postedit,		/* $POSTEDIT    */
      *term,		/* $TERM        */
      *zsh_terminfo,     /* $TERMINFO    */
+     *zsh_terminfodirs, /* $TERMINFO_DIRS */
      *ttystrname,	/* $TTY         */
      *pwd;		/* $PWD         */
 
@@ -208,6 +209,8 @@ static const struct gsu_scalar term_gsu =
 { termgetfn, termsetfn, stdunsetfn };
 static const struct gsu_scalar terminfo_gsu =
 { terminfogetfn, terminfosetfn, stdunsetfn };
+static const struct gsu_scalar terminfodirs_gsu =
+{ terminfodirsgetfn, terminfodirssetfn, stdunsetfn };
 static const struct gsu_scalar wordchars_gsu =
 { wordcharsgetfn, wordcharssetfn, stdunsetfn };
 static const struct gsu_scalar ifs_gsu =
@@ -283,6 +286,7 @@ IPDEF2("histchars", histchars_gsu, PM_DONTIMPORT),
 IPDEF2("HOME", home_gsu, PM_UNSET),
 IPDEF2("TERM", term_gsu, PM_UNSET),
 IPDEF2("TERMINFO", terminfo_gsu, PM_UNSET),
+IPDEF2("TERMINFO_DIRS", terminfodirs_gsu, PM_UNSET),
 IPDEF2("WORDCHARS", wordchars_gsu, 0),
 IPDEF2("IFS", ifs_gsu, PM_DONTIMPORT | PM_RESTRICTED),
 IPDEF2("_", underscore_gsu, PM_DONTIMPORT),
@@ -4511,6 +4515,33 @@ terminfosetfn(Param pm, char *x)
     term_reinit_from_pm();
 }
 
+/* Function to get value of special parameter `TERMINFO_DIRS' */
+
+/**/
+char *
+terminfodirsgetfn(UNUSED(Param pm))
+{
+    return zsh_terminfodirs ? zsh_terminfodirs : dupstring("");
+}
+
+/* Function to set value of special parameter `TERMINFO_DIRS' */
+
+/**/
+void
+terminfodirssetfn(Param pm, char *x)
+{
+    zsfree(zsh_terminfodirs);
+    zsh_terminfodirs = x;
+
+    /*
+     * terminfo relies on the value being exported before
+     * we reinitialise the terminal.  This is a bit inefficient.
+     */
+    if ((pm->node.flags & PM_EXPORTED) && x)
+	addenv(pm, x);
+
+    term_reinit_from_pm();
+}
 /* Function to get value for special parameter `pipestatus' */
 
 /**/
-- 
2.10.1



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