diff options
| -rw-r--r-- | shell/ash.c | 86 |
1 files changed, 69 insertions, 17 deletions
diff --git a/shell/ash.c b/shell/ash.c index 53c1409..cfe0433 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -348,6 +348,7 @@ static const char *const optletters_optnames[] = { "a" "allexport", "b" "notify", "u" "nounset", + "E" "errtrace", "\0" "vi" #if BASH_PIPEFAIL ,"\0" "pipefail" @@ -442,15 +443,16 @@ struct globals_misc { #define aflag optlist[11] #define bflag optlist[12] #define uflag optlist[13] -#define viflag optlist[14] +#define Eflag optlist[14] +#define viflag optlist[15] #if BASH_PIPEFAIL -# define pipefail optlist[15] +# define pipefail optlist[16] #else # define pipefail 0 #endif #if DEBUG -# define nolog optlist[15 + BASH_PIPEFAIL] -# define debug optlist[16 + BASH_PIPEFAIL] +# define nolog optlist[16 + BASH_PIPEFAIL] +# define debug optlist[17 + BASH_PIPEFAIL] #endif /* trap handler commands */ @@ -468,7 +470,11 @@ struct globals_misc { /* indicates specified signal received */ uint8_t gotsig[NSIG - 1]; /* offset by 1: "signal" 0 is meaningless */ uint8_t may_have_traps; /* 0: definitely no traps are set, 1: some traps may be set */ - char *trap[NSIG]; + char *trap[NSIG + 1]; +/* trap[0] is EXIT trap, trap[NTRAP_ERR] is ERR trap, other trap[i] are signal traps */ +#define NTRAP_ERR NSIG +#define NTRAP_LAST NSIG + char **trap_ptr; /* used only by "trap hack" */ /* Rarely referenced stuff */ @@ -2166,6 +2172,8 @@ struct globals_var { struct var varinit[ARRAY_SIZE(varinit_data)]; int lineno; char linenovar[sizeof("LINENO=") + sizeof(int)*3]; + unsigned trap_depth; + bool in_trap_ERR; /* ERR cannot recurse, no need to be a counter */ }; extern struct globals_var *BB_GLOBAL_CONST ash_ptr_to_globals_var; #define G_var (*ash_ptr_to_globals_var) @@ -2176,6 +2184,8 @@ extern struct globals_var *BB_GLOBAL_CONST ash_ptr_to_globals_var; #define varinit (G_var.varinit ) #define lineno (G_var.lineno ) #define linenovar (G_var.linenovar ) +#define trap_depth (G_var.trap_depth ) +#define in_trap_ERR (G_var.in_trap_ERR ) #define vifs varinit[0] #if ENABLE_ASH_MAIL # define vmail varinit[1] @@ -5163,13 +5173,13 @@ clear_traps(void) char **tp; INT_OFF; - for (tp = trap; tp < &trap[NSIG]; tp++) { + for (tp = trap; tp <= &trap[NTRAP_LAST]; tp++) { if (*tp && **tp) { /* trap not NULL or "" (SIG_IGN) */ if (trap_ptr == trap) free(*tp); /* else: it "belongs" to trap_ptr vector, don't free */ *tp = NULL; - if ((tp - trap) != 0) + if ((tp - trap) != 0 && (tp - trap) < NSIG) setsignal(tp - trap); } } @@ -9253,7 +9263,9 @@ dotrap(void) *g = 0; if (!p) continue; + trap_depth++; evalstring(p, 0); + trap_depth--; if (evalskip != SKIPFUNC) exitstatus = status; } @@ -9321,7 +9333,7 @@ evaltree(union node *n, int flags) case NCMD: evalfn = evalcommand; checkexit: - if (eflag && !(flags & EV_TESTED)) + if (!(flags & EV_TESTED)) checkexit = ~0; goto calleval; case NFOR: @@ -9395,8 +9407,32 @@ evaltree(union node *n, int flags) */ dotrap(); - if (checkexit & status) - raise_exception(EXEND); + if (checkexit & status) { + if (trap[NTRAP_ERR] && !in_trap_ERR) { + int err; + struct jmploc *volatile savehandler = exception_handler; + struct jmploc jmploc; + + in_trap_ERR = 1; + trap_depth++; + err = setjmp(jmploc.loc); + if (!err) { + exception_handler = &jmploc; + savestatus = exitstatus; + evalstring(trap[NTRAP_ERR], 0); + } + trap_depth--; + in_trap_ERR = 0; + + exception_handler = savehandler; + if (err && exception_type != EXERROR) + longjmp(exception_handler->loc, 1); + + exitstatus = savestatus; + } + if (eflag) + raise_exception(EXEND); + } if (flags & EV_EXIT) raise_exception(EXEND); @@ -9861,7 +9897,12 @@ evalfun(struct funcnode *func, int argc, char **argv, int flags) struct jmploc jmploc; int e; int savefuncline; + char *savetrap = NULL; + if (!Eflag) { + savetrap = trap[NTRAP_ERR]; + trap[NTRAP_ERR] = NULL; + } saveparam = shellparam; savefuncline = funcline; savehandler = exception_handler; @@ -9884,6 +9925,12 @@ evalfun(struct funcnode *func, int argc, char **argv, int flags) evaltree(func->n.ndefun.body, flags & EV_TESTED); funcdone: INT_OFF; + if (savetrap) { + if (!trap[NTRAP_ERR]) + trap[NTRAP_ERR] = savetrap; + else + free(savetrap); + } funcline = savefuncline; freefunc(func); freeparam(&shellparam); @@ -10912,13 +10959,15 @@ preadbuffer(void) static void nlprompt(void) { - g_parsefile->linno++; + if (trap_depth == 0) + g_parsefile->linno++; setprompt_if(doprompt, 2); } static void nlnoprompt(void) { - g_parsefile->linno++; + if (trap_depth == 0) + g_parsefile->linno++; needprompt = doprompt; } @@ -12620,7 +12669,8 @@ checkend: { if (c == '\n' || c == PEOF) { c = PEOF; - g_parsefile->linno++; + if (trap_depth == 0) + g_parsefile->linno++; needprompt = doprompt; } else { int len_here; @@ -13869,7 +13919,7 @@ trapcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) nextopt(nullstr); ap = argptr; if (!*ap) { - for (signo = 0; signo < NSIG; signo++) { + for (signo = 0; signo <= NTRAP_LAST; signo++) { char *tr = trap_ptr[signo]; if (tr) { /* note: bash adds "SIG", but only if invoked @@ -13878,7 +13928,7 @@ trapcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) * We are printing short names: */ out1fmt("trap -- %s %s\n", single_quote(tr), - get_signame(signo)); + (signo == NTRAP_ERR) ? "ERR" : get_signame(signo)); /* trap_ptr != trap only if we are in special-cased `trap` code. * In this case, we will exit very soon, no need to free(). */ /* if (trap_ptr != trap && tp[0]) */ @@ -13904,7 +13954,7 @@ trapcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) exitcode = 0; while (*ap) { - signo = get_signum(*ap); + signo = strcmp(*ap, "ERR") == 0 ? NTRAP_ERR : get_signum(*ap); if (signo < 0) { /* Mimic bash message exactly */ ash_msg("%s: invalid signal specification", *ap); @@ -13923,7 +13973,7 @@ trapcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) } free(trap[signo]); trap[signo] = action; - if (signo != 0) + if (signo != 0 && signo < NSIG) setsignal(signo); INT_ON; next: @@ -14348,7 +14398,9 @@ exitshell(void) if (p) { trap[0] = NULL; evalskip = 0; + trap_depth++; evalstring(p, 0); + trap_depth--; evalskip = SKIPFUNCDEF; /*free(p); - we'll exit soon */ } |