diff options
| -rw-r--r-- | shell/ash.c | 61 |
1 files changed, 34 insertions, 27 deletions
diff --git a/shell/ash.c b/shell/ash.c index 75a72ea..e900a42 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -1250,7 +1250,6 @@ static struct parsefile basepf; /* top level input file */ static struct parsefile *g_parsefile = &basepf; /* current input file */ static int startlinno; /* line # where last token started */ static char *commandname; /* currently executing command */ -static struct strlist *cmdenviron; /* environment for builtin command */ /* ============ Message printing */ @@ -2225,15 +2224,9 @@ reinit_unicode_for_ash(void) /* * Search the environment of a builtin command. */ -static const char * +static inline const char * bltinlookup(const char *name) { - struct strlist *sp; - - for (sp = cmdenviron; sp; sp = sp->next) { - if (varcmp(sp->text, name) == 0) - return var_end(sp->text); - } return lookupvar(name); } @@ -9179,7 +9172,7 @@ static struct localvar_list *localvar_stack; * Interrupts must be off. */ static void -poplocalvars(void) +poplocalvars(int keep) { struct localvar_list *ll; struct localvar *lvp, *next; @@ -9196,7 +9189,23 @@ poplocalvars(void) next = lvp->next; vp = lvp->vp; TRACE(("poplocalvar %s\n", vp ? vp->var_text : "-")); - if (vp == NULL) { /* $- saved */ + if (keep) { + int bits = VSTRFIXED; + + if (lvp->flags != VUNSET) { + if (vp->var_text == lvp->text) + bits |= VTEXTFIXED; + else if (!(lvp->flags & (VTEXTFIXED|VSTACK))) + free((char*)lvp->text); + } + + vp->flags &= ~bits; + vp->flags |= (lvp->flags & bits); + + if ((vp->flags & + (VEXPORT|VREADONLY|VSTRFIXED|VUNSET)) == VUNSET) + unsetvar(vp->var_text); + } else if (vp == NULL) { /* $- saved */ memcpy(optlist, lvp->text, sizeof(optlist)); free((char*)lvp->text); optschanged(); @@ -9260,7 +9269,7 @@ evalfun(struct funcnode *func, int argc, char **argv, int flags) #endif pushlocalvars(); evaltree(func->n.narg.next, flags & EV_TESTED); - poplocalvars(); + poplocalvars(0); funcdone: INT_OFF; funcnest--; @@ -9631,6 +9640,7 @@ evalcommand(union node *cmd, int flags) /* First expand the arguments. */ TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags)); setstackmark(&smark); + pushlocalvars(); back_exitstatus = 0; cmdentry.cmdtype = CMDBUILTIN; @@ -9684,6 +9694,8 @@ evalcommand(union node *cmd, int flags) spp = varlist.lastp; expandarg(argp, &varlist, EXP_VARTILDE); + mklocal((*spp)->text); + /* * Modify the command lookup path, if a PATH= assignment * is present @@ -9815,6 +9827,7 @@ evalcommand(union node *cmd, int flags) /* parent */ status = waitforjob(jp); INT_ON; + poplocalvars(0); TRACE(("forked child exited with %d\n", status)); break; } @@ -9827,17 +9840,10 @@ evalcommand(union node *cmd, int flags) /* NOTREACHED */ } /* default */ case CMDBUILTIN: - cmdenviron = varlist.list; - if (cmdenviron) { - struct strlist *list = cmdenviron; - int i = VNOSET; - if (spclbltin > 0 || argc == 0) { - i = 0; - if (cmd_is_exec && argc > 1) - i = VEXPORT; - } - listsetvar(list, i); - } + poplocalvars(spclbltin > 0 || argc == 0); + if (cmd_is_exec && argc > 1) + listsetvar(varlist.list, VEXPORT); + /* Tight loop with builtins only: * "while kill -0 $child; do true; done" * will never exit even if $child died, unless we do this @@ -9855,7 +9861,7 @@ evalcommand(union node *cmd, int flags) goto readstatus; case CMDFUNCTION: - listsetvar(varlist.list, 0); + poplocalvars(1); /* See above for the rationale */ dowait(DOWAIT_NONBLOCK, NULL); if (evalfun(cmdentry.u.func, argc, argv, flags)) @@ -12714,11 +12720,12 @@ dotcmd(int argc_ UNUSED_PARAM, char **argv_ UNUSED_PARAM) char *fullname; char **argv; char *args_need_save; - struct strlist *sp; volatile struct shparam saveparam; - for (sp = cmdenviron; sp; sp = sp->next) - setvareq(ckstrdup(sp->text), VSTRFIXED | VTEXTFIXED); +//??? +// struct strlist *sp; +// for (sp = cmdenviron; sp; sp = sp->next) +// setvareq(ckstrdup(sp->text), VSTRFIXED | VTEXTFIXED); nextopt(nullstr); /* handle possible "--" */ argv = argptr; @@ -13601,7 +13608,7 @@ reset(void) /* from var.c: */ while (localvar_stack) - poplocalvars(); + poplocalvars(0); } #if PROFILE |