ash: deal with some TODOs (mostly trivial)
function old new delta msg_illnum - 19 +19 evalvar 1365 1364 -1 illnum 19 - -19 subevalvar 1182 1158 -24 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 0/2 up/down: 19/-44) Total: -25 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
9f2e82ad2e
commit
ecc2a2e015
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@ -45,6 +45,9 @@ char FAST_FUNC bb_process_escape_sequence(const char **ptr)
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}
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#endif
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/* bash requires leading 0 in octal escapes:
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* \02 works, \2 does not (prints \ and 2).
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* We treat \2 as a valid octal escape sequence. */
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do {
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d = (unsigned char)(*q) - '0';
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#ifdef WANT_HEX_ESCAPES
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@ -80,7 +83,10 @@ char FAST_FUNC bb_process_escape_sequence(const char **ptr)
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break;
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}
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} while (*++p);
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n = *(p + (sizeof(charmap)/2));
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/* p points to found escape char or NUL,
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* advance it and find what it translates to */
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p += sizeof(charmap) / 2;
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n = *p;
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}
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*ptr = q;
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118
shell/ash.c
118
shell/ash.c
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@ -112,7 +112,7 @@ enum { NOPTS = ARRAY_SIZE(optletters_optnames) };
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static const char homestr[] ALIGN1 = "HOME";
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static const char snlfmt[] ALIGN1 = "%s\n";
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static const char illnum[] ALIGN1 = "Illegal number: %s";
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static const char msg_illnum[] ALIGN1 = "Illegal number: %s";
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/*
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* We enclose jmp_buf in a structure so that we can declare pointers to
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@ -142,17 +142,10 @@ struct globals_misc {
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struct jmploc *exception_handler;
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// disabled by vda: cannot understand how it was supposed to work -
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// cannot fix bugs. That's why you have to explain your non-trivial designs!
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// /* do we generate EXSIG events */
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// int exsig; /* counter */
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volatile int suppressint; /* counter */
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// TODO: rename
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// pendingsig -> pending_sig
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// intpending -> pending_int
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volatile /*sig_atomic_t*/ smallint intpending; /* 1 = got SIGINT */
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volatile int suppress_int; /* counter */
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volatile /*sig_atomic_t*/ smallint pending_int; /* 1 = got SIGINT */
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/* last pending signal */
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volatile /*sig_atomic_t*/ smallint pendingsig;
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volatile /*sig_atomic_t*/ smallint pending_sig;
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smallint exception_type; /* kind of exception (0..5) */
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/* exceptions */
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#define EXINT 0 /* SIGINT received */
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@ -220,10 +213,9 @@ extern struct globals_misc *const ash_ptr_to_globals_misc;
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#define arg0 (G_misc.arg0 )
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#define exception_handler (G_misc.exception_handler)
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#define exception_type (G_misc.exception_type )
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#define suppressint (G_misc.suppressint )
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#define intpending (G_misc.intpending )
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//#define exsig (G_misc.exsig )
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#define pendingsig (G_misc.pendingsig )
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#define suppress_int (G_misc.suppress_int )
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#define pending_int (G_misc.pending_int )
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#define pending_sig (G_misc.pending_sig )
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#define isloginsh (G_misc.isloginsh )
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#define nullstr (G_misc.nullstr )
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#define optlist (G_misc.optlist )
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@ -283,7 +275,7 @@ static int isdigit_str9(const char *str)
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* more fun than worrying about efficiency and portability. :-))
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*/
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#define INT_OFF do { \
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suppressint++; \
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suppress_int++; \
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xbarrier(); \
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} while (0)
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@ -324,11 +316,11 @@ raise_interrupt(void)
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{
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int ex_type;
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intpending = 0;
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pending_int = 0;
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/* Signal is not automatically unmasked after it is raised,
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* do it ourself - unmask all signals */
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sigprocmask_allsigs(SIG_UNBLOCK);
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/* pendingsig = 0; - now done in onsig() */
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/* pending_sig = 0; - now done in onsig() */
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ex_type = EXSIG;
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if (gotsig[SIGINT - 1] && !trap[SIGINT]) {
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@ -353,7 +345,7 @@ static IF_ASH_OPTIMIZE_FOR_SIZE(inline) void
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int_on(void)
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{
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xbarrier();
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if (--suppressint == 0 && intpending) {
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if (--suppress_int == 0 && pending_int) {
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raise_interrupt();
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}
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}
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@ -362,18 +354,18 @@ static IF_ASH_OPTIMIZE_FOR_SIZE(inline) void
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force_int_on(void)
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{
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xbarrier();
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suppressint = 0;
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if (intpending)
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suppress_int = 0;
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if (pending_int)
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raise_interrupt();
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}
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#define FORCE_INT_ON force_int_on()
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#define SAVE_INT(v) ((v) = suppressint)
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#define SAVE_INT(v) ((v) = suppress_int)
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#define RESTORE_INT(v) do { \
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xbarrier(); \
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suppressint = (v); \
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if (suppressint == 0 && intpending) \
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suppress_int = (v); \
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if (suppress_int == 0 && pending_int) \
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raise_interrupt(); \
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} while (0)
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@ -685,7 +677,7 @@ trace_printf(const char *fmt, ...)
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if (DEBUG_PID)
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fprintf(tracefile, "[%u] ", (int) getpid());
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if (DEBUG_SIG)
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fprintf(tracefile, "pending s:%d i:%d(supp:%d) ", pendingsig, intpending, suppressint);
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fprintf(tracefile, "pending s:%d i:%d(supp:%d) ", pending_sig, pending_int, suppress_int);
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va_start(va, fmt);
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vfprintf(tracefile, fmt, va);
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va_end(va);
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@ -701,7 +693,7 @@ trace_vprintf(const char *fmt, va_list va)
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if (DEBUG_PID)
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fprintf(tracefile, "[%u] ", (int) getpid());
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if (DEBUG_SIG)
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fprintf(tracefile, "pending s:%d i:%d(supp:%d) ", pendingsig, intpending, suppressint);
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fprintf(tracefile, "pending s:%d i:%d(supp:%d) ", pending_sig, pending_int, suppress_int);
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vfprintf(tracefile, fmt, va);
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}
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@ -1556,7 +1548,7 @@ static int
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number(const char *s)
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{
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if (!is_number(s))
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ash_msg_and_raise_error(illnum, s);
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ash_msg_and_raise_error(msg_illnum, s);
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return atoi(s);
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}
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@ -2351,8 +2343,6 @@ setprompt(int whichprompt)
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#define CD_PHYSICAL 1
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#define CD_PRINT 2
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static int docd(const char *, int);
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static int
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cdopt(void)
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{
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@ -2360,7 +2350,7 @@ cdopt(void)
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int i, j;
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j = 'L';
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while ((i = nextopt("LP"))) {
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while ((i = nextopt("LP")) != '\0') {
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if (i != j) {
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flags ^= CD_PHYSICAL;
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j = i;
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@ -3315,14 +3305,14 @@ onsig(int signo)
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{
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gotsig[signo - 1] = 1;
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if (/* exsig || */ (signo == SIGINT && !trap[SIGINT])) {
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if (!suppressint) {
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pendingsig = 0;
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if (signo == SIGINT && !trap[SIGINT]) {
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if (!suppress_int) {
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pending_sig = 0;
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raise_interrupt(); /* does not return */
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}
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intpending = 1;
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pending_int = 1;
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} else {
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pendingsig = signo;
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pending_sig = signo;
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}
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}
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@ -3545,7 +3535,6 @@ getjob(const char *name, int getctl)
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}
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if (is_number(p)) {
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// TODO: number() instead? It does error checking...
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num = atoi(p);
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if (num < njobs) {
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jp = jobtab + num - 1;
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@ -3917,7 +3906,7 @@ static int
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blocking_wait_with_raise_on_sig(struct job *job)
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{
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pid_t pid = dowait(DOWAIT_BLOCK, job);
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if (pid <= 0 && pendingsig)
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if (pid <= 0 && pending_sig)
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raise_exception(EXSIG);
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return pid;
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}
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@ -4025,7 +4014,7 @@ jobscmd(int argc UNUSED_PARAM, char **argv)
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int mode, m;
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mode = 0;
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while ((m = nextopt("lp"))) {
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while ((m = nextopt("lp")) != '\0') {
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if (m == 'l')
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mode |= SHOW_PIDS;
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else
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@ -4079,9 +4068,7 @@ waitcmd(int argc UNUSED_PARAM, char **argv)
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int retval;
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struct job *jp;
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// exsig++;
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// xbarrier();
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if (pendingsig)
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if (pending_sig)
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raise_exception(EXSIG);
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nextopt(nullstr);
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@ -4317,7 +4304,7 @@ cmdputs(const char *s)
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if (!str)
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continue;
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dostr:
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while ((c = *str++)) {
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while ((c = *str++) != '\0') {
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USTPUTC(c, nextc);
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}
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}
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@ -6126,15 +6113,15 @@ subevalvar(char *p, char *str, int strloc, int subtype,
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#if ENABLE_ASH_BASH_COMPAT
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case VSSUBSTR:
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loc = str = stackblock() + strloc;
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// TODO: number() instead? It does error checking...
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pos = atoi(loc);
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/* Read POS in ${var:POS:LEN} */
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pos = atoi(loc); /* number(loc) errors out on "1:4" */
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len = str - startp - 1;
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/* *loc != '\0', guaranteed by parser */
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if (quotes) {
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char *ptr;
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/* We must adjust the length by the number of escapes we find. */
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/* Adjust the length by the number of escapes */
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for (ptr = startp; ptr < (str - 1); ptr++) {
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if (*ptr == CTLESC) {
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len--;
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@ -6145,15 +6132,22 @@ subevalvar(char *p, char *str, int strloc, int subtype,
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orig_len = len;
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if (*loc++ == ':') {
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// TODO: number() instead? It does error checking...
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len = atoi(loc);
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/* ${var::LEN} */
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len = number(loc);
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} else {
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/* Skip POS in ${var:POS:LEN} */
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len = orig_len;
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while (*loc && *loc != ':')
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while (*loc && *loc != ':') {
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/* TODO?
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* bash complains on: var=qwe; echo ${var:1a:123}
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if (!isdigit(*loc))
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ash_msg_and_raise_error(msg_illnum, str);
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*/
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loc++;
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if (*loc++ == ':')
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// TODO: number() instead? It does error checking...
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len = atoi(loc);
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}
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if (*loc++ == ':') {
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len = number(loc);
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}
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}
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if (pos >= orig_len) {
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pos = 0;
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@ -6372,7 +6366,7 @@ varvalue(char *name, int varflags, int flags, struct strlist *var_str_list)
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ap = shellparam.p;
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if (!ap)
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return -1;
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while ((p = *ap++)) {
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while ((p = *ap++) != NULL) {
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size_t partlen;
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partlen = strlen(p);
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@ -6406,8 +6400,7 @@ varvalue(char *name, int varflags, int flags, struct strlist *var_str_list)
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case '7':
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case '8':
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case '9':
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// TODO: number() instead? It does error checking...
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num = atoi(name);
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num = number(name);
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if (num < 0 || num > shellparam.nparam)
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return -1;
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p = num ? shellparam.p[num - 1] : arg0;
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@ -6819,7 +6812,7 @@ expmeta(char *enddir, char *name)
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p++;
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if (*p == '.')
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matchdot++;
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while (!intpending && (dp = readdir(dirp)) != NULL) {
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while (!pending_int && (dp = readdir(dirp)) != NULL) {
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if (dp->d_name[0] == '.' && !matchdot)
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continue;
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if (pmatch(start, dp->d_name)) {
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@ -7213,8 +7206,8 @@ shellexec(char **argv, const char *path, int idx)
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break;
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}
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exitstatus = exerrno;
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TRACE(("shellexec failed for %s, errno %d, suppressint %d\n",
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argv[0], e, suppressint));
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TRACE(("shellexec failed for %s, errno %d, suppress_int %d\n",
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argv[0], e, suppress_int));
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ash_msg_and_raise(EXEXEC, "%s: %s", argv[0], errmsg(e, "not found"));
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/* NOTREACHED */
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}
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@ -8016,7 +8009,7 @@ dotrap(void)
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uint8_t savestatus;
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savestatus = exitstatus;
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pendingsig = 0;
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pending_sig = 0;
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xbarrier();
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TRACE(("dotrap entered\n"));
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@ -8196,7 +8189,7 @@ evaltree(union node *n, int flags)
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out1:
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if (checkexit & exitstatus)
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evalskip |= SKIPEVAL;
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else if (pendingsig && dotrap())
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else if (pending_sig && dotrap())
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goto exexit;
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if (flags & EV_EXIT) {
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@ -9116,7 +9109,7 @@ evalcommand(union node *cmd, int flags)
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if (i == EXINT)
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exit_status = 128 + SIGINT;
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if (i == EXSIG)
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exit_status = 128 + pendingsig;
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exit_status = 128 + pending_sig;
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exitstatus = exit_status;
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if (i == EXINT || spclbltin > 0) {
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raise:
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@ -9170,7 +9163,6 @@ evalbltin(const struct builtincmd *cmd, int argc, char **argv)
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exitstatus |= ferror(stdout);
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clearerr(stdout);
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commandname = savecmdname;
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// exsig = 0;
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exception_handler = savehandler;
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return i;
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@ -9221,7 +9213,7 @@ breakcmd(int argc UNUSED_PARAM, char **argv)
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int n = argv[1] ? number(argv[1]) : 1;
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if (n <= 0)
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ash_msg_and_raise_error(illnum, argv[1]);
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ash_msg_and_raise_error(msg_illnum, argv[1]);
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if (n > loopnest)
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n = loopnest;
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if (n > 0) {
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@ -12712,7 +12704,7 @@ umaskcmd(int argc UNUSED_PARAM, char **argv)
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mask = 0;
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do {
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if (*ap >= '8' || *ap < '0')
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ash_msg_and_raise_error(illnum, argv[1]);
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ash_msg_and_raise_error(msg_illnum, argv[1]);
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mask = (mask << 3) + (*ap - '0');
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} while (*++ap != '\0');
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umask(mask);
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