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https://github.com/sheumann/hush.git
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ash: fix handling of duplicate "local"
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
63f4d32c98
commit
0a0acb55db
51
shell/ash.c
51
shell/ash.c
@ -2030,7 +2030,7 @@ varcmp(const char *p, const char *q)
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int c, d;
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while ((c = *p) == (d = *q)) {
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if (!c || c == '=')
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if (c == '\0' || c == '=')
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goto out;
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p++;
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q++;
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@ -2247,7 +2247,7 @@ setvar(const char *name, const char *val, int flags)
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}
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static void FAST_FUNC
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setvar2(const char *name, const char *val)
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setvar0(const char *name, const char *val)
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{
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setvar(name, val, 0);
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}
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@ -2310,7 +2310,7 @@ unsetvar(const char *s)
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free(vp);
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INT_ON;
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} else {
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setvar2(s, 0);
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setvar0(s, NULL);
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vp->flags &= ~VEXPORT;
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}
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ok:
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@ -5505,7 +5505,7 @@ ash_arith(const char *s)
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arith_t result;
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math_state.lookupvar = lookupvar;
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math_state.setvar = setvar2;
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math_state.setvar = setvar0;
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//math_state.endofname = endofname;
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INT_OFF;
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@ -6360,7 +6360,7 @@ subevalvar(char *p, char *varname, int strloc, int subtype,
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switch (subtype) {
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case VSASSIGN:
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setvar2(varname, startp);
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setvar0(varname, startp);
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amount = startp - expdest;
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STADJUST(amount, expdest);
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return startp;
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@ -8591,7 +8591,7 @@ evalfor(union node *n, int flags)
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loopnest++;
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flags &= EV_TESTED;
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for (sp = arglist.list; sp; sp = sp->next) {
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setvar2(n->nfor.var, sp->text);
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setvar0(n->nfor.var, sp->text);
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evaltree(n->nfor.body, flags);
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if (evalskip) {
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if (evalskip == SKIPCONT && --skipcount <= 0) {
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@ -8970,21 +8970,37 @@ mklocal(char *name)
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struct localvar *lvp;
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struct var **vpp;
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struct var *vp;
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char *eq = strchr(name, '=');
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INT_OFF;
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lvp = ckzalloc(sizeof(struct localvar));
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/* Cater for duplicate "local". Examples:
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* x=0; f() { local x=1; echo $x; local x; echo $x; }; f; echo $x
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* x=0; f() { local x=1; echo $x; local x=2; echo $x; }; f; echo $x
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*/
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lvp = localvars;
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while (lvp) {
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if (varcmp(lvp->vp->var_text, name) == 0) {
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if (eq)
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setvareq(name, 0);
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/* else:
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* it's a duplicate "local VAR" declaration, do nothing
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*/
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return;
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}
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lvp = lvp->next;
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}
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lvp = ckzalloc(sizeof(*lvp));
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if (LONE_DASH(name)) {
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char *p;
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p = ckmalloc(sizeof(optlist));
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lvp->text = memcpy(p, optlist, sizeof(optlist));
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vp = NULL;
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} else {
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char *eq;
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vpp = hashvar(name);
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vp = *findvar(vpp, name);
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eq = strchr(name, '=');
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if (vp == NULL) {
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/* variable did not exist yet */
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if (eq)
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setvareq(name, VSTRFIXED);
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else
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@ -8994,12 +9010,15 @@ mklocal(char *name)
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} else {
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lvp->text = vp->var_text;
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lvp->flags = vp->flags;
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/* make sure neither "struct var" nor string gets freed
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* during (un)setting:
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*/
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vp->flags |= VSTRFIXED|VTEXTFIXED;
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if (eq)
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setvareq(name, 0);
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else
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/* "local VAR" unsets VAR: */
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setvar(name, NULL, 0);
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setvar0(name, NULL);
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}
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}
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lvp->vp = vp;
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@ -9491,7 +9510,7 @@ evalcommand(union node *cmd, int flags)
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* '_' in 'vi' command mode during line editing...
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* However I implemented that within libedit itself.
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*/
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setvar2("_", lastarg);
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setvar0("_", lastarg);
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}
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popstackmark(&smark);
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}
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@ -12885,7 +12904,7 @@ readcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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* to jump out of it.
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*/
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INT_OFF;
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r = shell_builtin_read(setvar2,
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r = shell_builtin_read(setvar0,
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argptr,
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bltinlookup("IFS"), /* can be NULL */
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read_flags,
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@ -13046,14 +13065,14 @@ init(void)
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}
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}
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setvar2("PPID", utoa(getppid()));
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setvar0("PPID", utoa(getppid()));
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#if ENABLE_ASH_BASH_COMPAT
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p = lookupvar("SHLVL");
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setvar("SHLVL", utoa((p ? atoi(p) : 0) + 1), VEXPORT);
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if (!lookupvar("HOSTNAME")) {
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struct utsname uts;
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uname(&uts);
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setvar2("HOSTNAME", uts.nodename);
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setvar0("HOSTNAME", uts.nodename);
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}
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#endif
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p = lookupvar("PWD");
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@ -13309,7 +13328,7 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
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hp = lookupvar("HOME");
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if (hp) {
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hp = concat_path_file(hp, ".ash_history");
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setvar2("HISTFILE", hp);
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setvar0("HISTFILE", hp);
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free((char*)hp);
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hp = lookupvar("HISTFILE");
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}
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@ -1 +1 @@
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heredoc1.tests: line 3: syntax error: unexpected "then"
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./heredoc1.tests: line 3: syntax error: unexpected "then"
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5
shell/ash_test/ash-vars/var3.right
Normal file
5
shell/ash_test/ash-vars/var3.right
Normal file
@ -0,0 +1,5 @@
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1
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1
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0
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1
shell/ash_test/ash-vars/var3.tests
Executable file
1
shell/ash_test/ash-vars/var3.tests
Executable file
@ -0,0 +1 @@
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x=0; f() { local x=1; echo $x; local x; echo $x; unset x; echo $x; local x; echo $x; }; f; echo $x
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