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-rw-r--r--toys/pending/sh.c52
1 files changed, 37 insertions, 15 deletions
diff --git a/toys/pending/sh.c b/toys/pending/sh.c
index df8edd4f..dc4b774e 100644
--- a/toys/pending/sh.c
+++ b/toys/pending/sh.c
@@ -72,7 +72,7 @@ config CD
default n
depends on SH
help
- usage: cd [-PLe] [path]
+ usage: cd [-PL] [path]
Change current directory. With no arguments, go $HOME.
@@ -154,6 +154,17 @@ void array_add(char ***list, unsigned count, char *data)
// TODO local variables
+// Return index of variable within this list
+static unsigned findvar(char **list, char *name, int len)
+{
+ unsigned i;
+
+ for (i = 0; list[i]; i++)
+ if (!strncmp(list[i], name, len) && list[i][len] == '=') break;
+
+ return i;
+}
+
// Assign one variable
// s: key=val
// type: 0 = whatever it was before, local otherwise
@@ -162,30 +173,41 @@ void array_add(char ***list, unsigned count, char *data)
// ft
static void setvar(char *s, unsigned type)
{
+ unsigned uu;
+ int len = stridx(s, '=');
+
+ if (len == -1) {
+ error_msg("no = in setvar %s\n", s);
+ return;
+ }
+
if (type&TAKE_MEM) type ^= TAKE_MEM;
else s = xstrdup(s);
// local, export, readonly, integer...
- xsetenv(s, 0);
+
+ // exported variable?
+ if (environ && environ[uu = findvar(environ, s, len)]) {
+ if (uu>=toys.envc) free(environ[uu]);
+ environ[uu] = s;
+ } else {
+ uu = 0;
+ if (TT.locals && TT.locals[uu = findvar(TT.locals, s, len)]) {
+ free(TT.locals[uu]);
+ TT.locals[uu] = s;
+ } else array_add(&TT.locals, uu, s);
+ }
}
// get variable of length len starting at s.
static char *getvarlen(char *s, int len)
{
- unsigned uu;
- char **ss = TT.locals;
-
- // loop through local, then global variables
- for (uu = 0; ; uu++) {
- if (!ss || !ss[uu]) {
- if (ss != TT.locals) return 0;
- ss = environ;
- uu = 0;
- }
+ int i;
- // Use UHF rubik's cube protocol to find match.
- if (!strncmp(ss[uu], s, len) && ss[uu][len] == '=') return ss[uu]+len+1;
- }
+ if (TT.locals && TT.locals[i = findvar(TT.locals, s, len)])
+ return TT.locals[i]+len+1;
+ if (environ && environ[i = findvar(environ, s, len)])
+ return environ[i]+len+1;
return 0;
}