mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-14 23:38:35 +00:00
msh: fix for bug 846 ("break" didn't work second time)
msh: don't use floating point in "times" builtin +4 bytes difference
This commit is contained in:
Denis Vlasenko
parent
8a2e421f26
commit
fe2188378c
204
shell/msh.c
204
shell/msh.c
@ -489,36 +489,37 @@ static char **getwords(struct wdblock *wb);
|
||||
|
||||
/* -------- misc stuff -------- */
|
||||
|
||||
static int dolabel(struct op *t, char **args);
|
||||
static int dohelp(struct op *t, char **args);
|
||||
static int dochdir(struct op *t, char **args);
|
||||
static int doshift(struct op *t, char **args);
|
||||
static int dologin(struct op *t, char **args);
|
||||
static int doumask(struct op *t, char **args);
|
||||
static int doexec(struct op *t, char **args);
|
||||
static int dodot(struct op *t, char **args);
|
||||
static int dowait(struct op *t, char **args);
|
||||
static int doread(struct op *t, char **args);
|
||||
static int doeval(struct op *t, char **args);
|
||||
static int dotrap(struct op *t, char **args);
|
||||
static int dobreak(struct op *t, char **args);
|
||||
static int doexit(struct op *t, char **args);
|
||||
static int doexport(struct op *t, char **args);
|
||||
static int doreadonly(struct op *t, char **args);
|
||||
static int doset(struct op *t, char **args);
|
||||
static int dotimes(struct op *t, char **args);
|
||||
static int docontinue(struct op *t, char **args);
|
||||
|
||||
static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp);
|
||||
static int execute(struct op *t, int *pin, int *pout, int no_fork);
|
||||
static int iosetup(struct ioword *iop, int pipein, int pipeout);
|
||||
static void brkset(struct brkcon *bc);
|
||||
static int dolabel(struct op *t);
|
||||
static int dohelp(struct op *t);
|
||||
static int dochdir(struct op *t);
|
||||
static int doshift(struct op *t);
|
||||
static int dologin(struct op *t);
|
||||
static int doumask(struct op *t);
|
||||
static int doexec(struct op *t);
|
||||
static int dodot(struct op *t);
|
||||
static int dowait(struct op *t);
|
||||
static int doread(struct op *t);
|
||||
static int doeval(struct op *t);
|
||||
static int dotrap(struct op *t);
|
||||
static int getsig(char *s);
|
||||
static void setsig(int n, sighandler_t f);
|
||||
static int getn(char *as);
|
||||
static int dobreak(struct op *t);
|
||||
static int docontinue(struct op *t);
|
||||
static int brkcontin(char *cp, int val);
|
||||
static int doexit(struct op *t);
|
||||
static int doexport(struct op *t);
|
||||
static int doreadonly(struct op *t);
|
||||
static void rdexp(char **wp, void (*f) (struct var *), int key);
|
||||
static void badid(char *s);
|
||||
static int doset(struct op *t);
|
||||
static void varput(char *s, int out);
|
||||
static int dotimes(struct op *t);
|
||||
static int expand(const char *cp, struct wdblock **wbp, int f);
|
||||
static char *blank(int f);
|
||||
static int dollar(int quoted);
|
||||
@ -559,7 +560,7 @@ static const char *const signame[] = {
|
||||
};
|
||||
|
||||
|
||||
typedef int (*builtin_func_ptr)(struct op *);
|
||||
typedef int (*builtin_func_ptr)(struct op *, char **);
|
||||
|
||||
struct builtincmd {
|
||||
const char *name;
|
||||
@ -1821,7 +1822,7 @@ static struct op *command(int cf)
|
||||
t->type = (c == WHILE ? TWHILE : TUNTIL);
|
||||
t->left = c_list();
|
||||
t->right = dogroup(1);
|
||||
t->words = NULL;
|
||||
/* t->words = NULL; - newtp() did this */
|
||||
multiline--;
|
||||
break;
|
||||
|
||||
@ -2741,7 +2742,13 @@ static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp)
|
||||
}
|
||||
|
||||
forked = 0;
|
||||
t->words = wp;
|
||||
// We were pointing t->words to temporary (expanded) arg list:
|
||||
// t->words = wp;
|
||||
// and restored it later (in execute()), but "break"
|
||||
// longjmps away (at "Run builtin" below), leaving t->words clobbered!
|
||||
// See http://bugs.busybox.net/view.php?id=846.
|
||||
// Now we do not touch t->words, but separately pass wp as param list
|
||||
// to builtins
|
||||
DBGPRINTF(("FORKEXEC: bltin %p, no_fork %d, owp %p\n", bltin,
|
||||
no_fork, owp));
|
||||
/* Don't fork if it is a lone builtin (not in pipe)
|
||||
@ -2836,7 +2843,8 @@ static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp)
|
||||
_exit(-1);
|
||||
return -1;
|
||||
}
|
||||
i = setstatus(bltin(t));
|
||||
/* Run builtin */
|
||||
i = setstatus(bltin(t, wp));
|
||||
if (forked)
|
||||
_exit(i);
|
||||
DBGPRINTF(("FORKEXEC: returning i=%d\n", i));
|
||||
@ -3156,7 +3164,7 @@ static int run(struct ioarg *argp, int (*f) (struct ioarg *))
|
||||
* built-in commands: doX
|
||||
*/
|
||||
|
||||
static int dohelp(struct op *t)
|
||||
static int dohelp(struct op *t, char **args)
|
||||
{
|
||||
int col;
|
||||
const struct builtincmd *x;
|
||||
@ -3192,16 +3200,16 @@ static int dohelp(struct op *t)
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
static int dolabel(struct op *t)
|
||||
static int dolabel(struct op *t, char **args)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int dochdir(struct op *t)
|
||||
static int dochdir(struct op *t, char **args)
|
||||
{
|
||||
const char *cp, *er;
|
||||
|
||||
cp = t->words[1];
|
||||
cp = args[1];
|
||||
if (cp == NULL) {
|
||||
cp = homedir->value;
|
||||
if (cp != NULL)
|
||||
@ -3218,11 +3226,11 @@ static int dochdir(struct op *t)
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int doshift(struct op *t)
|
||||
static int doshift(struct op *t, char **args)
|
||||
{
|
||||
int n;
|
||||
|
||||
n = t->words[1] ? getn(t->words[1]) : 1;
|
||||
n = args[1] ? getn(args[1]) : 1;
|
||||
if (dolc < n) {
|
||||
err("nothing to shift");
|
||||
return 1;
|
||||
@ -3237,7 +3245,7 @@ static int doshift(struct op *t)
|
||||
/*
|
||||
* execute login and newgrp directly
|
||||
*/
|
||||
static int dologin(struct op *t)
|
||||
static int dologin(struct op *t, char **args)
|
||||
{
|
||||
const char *cp;
|
||||
|
||||
@ -3245,19 +3253,19 @@ static int dologin(struct op *t)
|
||||
signal(SIGINT, SIG_DFL);
|
||||
signal(SIGQUIT, SIG_DFL);
|
||||
}
|
||||
cp = rexecve(t->words[0], t->words, makenv(0, NULL));
|
||||
prs(t->words[0]);
|
||||
cp = rexecve(args[0], args, makenv(0, NULL));
|
||||
prs(args[0]);
|
||||
prs(": ");
|
||||
err(cp);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int doumask(struct op *t)
|
||||
static int doumask(struct op *t, char **args)
|
||||
{
|
||||
int i;
|
||||
char *cp;
|
||||
|
||||
cp = t->words[1];
|
||||
cp = args[1];
|
||||
if (cp == NULL) {
|
||||
i = umask(0);
|
||||
umask(i);
|
||||
@ -3273,28 +3281,36 @@ static int doumask(struct op *t)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int doexec(struct op *t)
|
||||
static int doexec(struct op *t, char **args)
|
||||
{
|
||||
int i;
|
||||
jmp_buf ex;
|
||||
xint *ofail;
|
||||
char **sv_words;
|
||||
|
||||
t->ioact = NULL;
|
||||
for (i = 0; (t->words[i] = t->words[i + 1]) != NULL; i++)
|
||||
continue;
|
||||
if (i == 0)
|
||||
if (!args[1])
|
||||
return 1;
|
||||
|
||||
execflg = 1;
|
||||
ofail = failpt;
|
||||
failpt = ex;
|
||||
|
||||
sv_words = t->words;
|
||||
t->words = args + 1;
|
||||
// TODO: test what will happen with "exec break" -
|
||||
// will it leave t->words pointing to garbage?
|
||||
// (see http://bugs.busybox.net/view.php?id=846)
|
||||
if (setjmp(failpt) == 0)
|
||||
execute(t, NOPIPE, NOPIPE, /* no_fork: */ 1);
|
||||
t->words = sv_words;
|
||||
|
||||
failpt = ofail;
|
||||
execflg = 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int dodot(struct op *t)
|
||||
static int dodot(struct op *t, char **args)
|
||||
{
|
||||
int i;
|
||||
const char *sp;
|
||||
@ -3305,7 +3321,7 @@ static int dodot(struct op *t)
|
||||
DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, global_env.linep is %s\n",
|
||||
t, t->left, t->right, ((global_env.linep == NULL) ? "NULL" : global_env.linep)));
|
||||
|
||||
cp = t->words[1];
|
||||
cp = args[1];
|
||||
if (cp == NULL) {
|
||||
DBGPRINTF(("DODOT: bad args, ret 0\n"));
|
||||
return 0;
|
||||
@ -3349,12 +3365,12 @@ static int dodot(struct op *t)
|
||||
return -1;
|
||||
}
|
||||
|
||||
static int dowait(struct op *t)
|
||||
static int dowait(struct op *t, char **args)
|
||||
{
|
||||
int i;
|
||||
char *cp;
|
||||
|
||||
cp = t->words[1];
|
||||
cp = args[1];
|
||||
if (cp != NULL) {
|
||||
i = getn(cp);
|
||||
if (i == 0)
|
||||
@ -3365,17 +3381,17 @@ static int dowait(struct op *t)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int doread(struct op *t)
|
||||
static int doread(struct op *t, char **args)
|
||||
{
|
||||
char *cp, **wp;
|
||||
int nb = 0;
|
||||
int nl = 0;
|
||||
|
||||
if (t->words[1] == NULL) {
|
||||
if (args[1] == NULL) {
|
||||
err("Usage: read name ...");
|
||||
return 1;
|
||||
}
|
||||
for (wp = t->words + 1; *wp; wp++) {
|
||||
for (wp = args + 1; *wp; wp++) {
|
||||
for (cp = global_env.linep; !nl && cp < elinep - 1; cp++) {
|
||||
nb = nonblock_safe_read(0, cp, sizeof(*cp));
|
||||
if (nb != sizeof(*cp))
|
||||
@ -3392,17 +3408,17 @@ static int doread(struct op *t)
|
||||
return nb <= 0;
|
||||
}
|
||||
|
||||
static int doeval(struct op *t)
|
||||
static int doeval(struct op *t, char **args)
|
||||
{
|
||||
return RUN(awordlist, t->words + 1, wdchar);
|
||||
return RUN(awordlist, args + 1, wdchar);
|
||||
}
|
||||
|
||||
static int dotrap(struct op *t)
|
||||
static int dotrap(struct op *t, char **args)
|
||||
{
|
||||
int n, i;
|
||||
int resetsig;
|
||||
|
||||
if (t->words[1] == NULL) {
|
||||
if (args[1] == NULL) {
|
||||
for (i = 0; i <= _NSIG; i++)
|
||||
if (trap[i]) {
|
||||
prn(i);
|
||||
@ -3412,14 +3428,14 @@ static int dotrap(struct op *t)
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
resetsig = isdigit(*t->words[1]);
|
||||
for (i = resetsig ? 1 : 2; t->words[i] != NULL; ++i) {
|
||||
n = getsig(t->words[i]);
|
||||
resetsig = isdigit(args[1][0]);
|
||||
for (i = resetsig ? 1 : 2; args[i] != NULL; ++i) {
|
||||
n = getsig(args[i]);
|
||||
freecell(trap[n]);
|
||||
trap[n] = 0;
|
||||
if (!resetsig) {
|
||||
if (*t->words[1] != '\0') {
|
||||
trap[n] = strsave(t->words[1], 0);
|
||||
if (args[1][0] != '\0') {
|
||||
trap[n] = strsave(args[1], 0);
|
||||
setsig(n, sig);
|
||||
} else
|
||||
setsig(n, SIG_IGN);
|
||||
@ -3478,14 +3494,14 @@ static int getn(char *as)
|
||||
return n * m;
|
||||
}
|
||||
|
||||
static int dobreak(struct op *t)
|
||||
static int dobreak(struct op *t, char **args)
|
||||
{
|
||||
return brkcontin(t->words[1], 1);
|
||||
return brkcontin(args[1], 1);
|
||||
}
|
||||
|
||||
static int docontinue(struct op *t)
|
||||
static int docontinue(struct op *t, char **args)
|
||||
{
|
||||
return brkcontin(t->words[1], 0);
|
||||
return brkcontin(args[1], 0);
|
||||
}
|
||||
|
||||
static int brkcontin(char *cp, int val)
|
||||
@ -3511,12 +3527,12 @@ static int brkcontin(char *cp, int val)
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
static int doexit(struct op *t)
|
||||
static int doexit(struct op *t, char **args)
|
||||
{
|
||||
char *cp;
|
||||
|
||||
execflg = 0;
|
||||
cp = t->words[1];
|
||||
cp = args[1];
|
||||
if (cp != NULL)
|
||||
setstatus(getn(cp));
|
||||
|
||||
@ -3527,15 +3543,15 @@ static int doexit(struct op *t)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int doexport(struct op *t)
|
||||
static int doexport(struct op *t, char **args)
|
||||
{
|
||||
rdexp(t->words + 1, export, EXPORT);
|
||||
rdexp(args + 1, export, EXPORT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int doreadonly(struct op *t)
|
||||
static int doreadonly(struct op *t, char **args)
|
||||
{
|
||||
rdexp(t->words + 1, ronly, RONLY);
|
||||
rdexp(args + 1, ronly, RONLY);
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -3568,21 +3584,20 @@ static void badid(char *s)
|
||||
err(": bad identifier");
|
||||
}
|
||||
|
||||
static int doset(struct op *t)
|
||||
static int doset(struct op *t, char **args)
|
||||
{
|
||||
struct var *vp;
|
||||
char *cp;
|
||||
int n;
|
||||
|
||||
cp = t->words[1];
|
||||
cp = args[1];
|
||||
if (cp == NULL) {
|
||||
for (vp = vlist; vp; vp = vp->next)
|
||||
varput(vp->name, 1);
|
||||
return 0;
|
||||
}
|
||||
if (*cp == '-') {
|
||||
/* bad: t->words++; */
|
||||
for (n = 0; (t->words[n] = t->words[n + 1]) != NULL; n++);
|
||||
args++;
|
||||
if (*++cp == 0)
|
||||
FLAG['x'] = FLAG['v'] = 0;
|
||||
else {
|
||||
@ -3602,12 +3617,12 @@ static int doset(struct op *t)
|
||||
}
|
||||
setdash();
|
||||
}
|
||||
if (t->words[1]) {
|
||||
t->words[0] = dolv[0];
|
||||
for (n = 1; t->words[n]; n++)
|
||||
setarea((char *) t->words[n], 0);
|
||||
if (args[1]) {
|
||||
args[0] = dolv[0];
|
||||
for (n = 1; args[n]; n++)
|
||||
setarea((char *) args[n], 0);
|
||||
dolc = n - 1;
|
||||
dolv = t->words;
|
||||
dolv = args;
|
||||
setval(lookup("#"), putn(dolc));
|
||||
setarea((char *) (dolv - 1), 0);
|
||||
}
|
||||
@ -3627,21 +3642,40 @@ static void varput(char *s, int out)
|
||||
* Copyright (c) 1999 Herbert Xu <herbert@debian.org>
|
||||
* This file contains code for the times builtin.
|
||||
*/
|
||||
static int dotimes(struct op *t)
|
||||
static void times_fmt(char *buf, clock_t val, unsigned clk_tck)
|
||||
{
|
||||
unsigned min, sec;
|
||||
if (sizeof(val) > sizeof(int))
|
||||
sec = ((unsigned long)val) / clk_tck;
|
||||
else
|
||||
sec = ((unsigned)val) / clk_tck;
|
||||
min = sec / 60;
|
||||
#if ENABLE_DESKTOP
|
||||
sprintf(buf, "%um%u.%03us", min, (sec - min * 60),
|
||||
/* msec: */ ((unsigned)(val - (clock_t)sec * clk_tck)) * 1000 / clk_tck
|
||||
);
|
||||
#else
|
||||
sprintf(buf, "%um%us", min, (sec - min * 60));
|
||||
#endif
|
||||
}
|
||||
|
||||
static int dotimes(struct op *t, char **args)
|
||||
{
|
||||
struct tms buf;
|
||||
long clk_tck = sysconf(_SC_CLK_TCK);
|
||||
unsigned clk_tck = sysconf(_SC_CLK_TCK);
|
||||
/* How much do we need for "NmN.NNNs" ? */
|
||||
enum { TIMEBUF_SIZE = sizeof(int)*3 + sizeof(int)*3 + 6 };
|
||||
char u[TIMEBUF_SIZE], s[TIMEBUF_SIZE];
|
||||
char cu[TIMEBUF_SIZE], cs[TIMEBUF_SIZE];
|
||||
|
||||
times(&buf);
|
||||
printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n",
|
||||
(int) (buf.tms_utime / clk_tck / 60),
|
||||
((double) buf.tms_utime) / clk_tck,
|
||||
(int) (buf.tms_stime / clk_tck / 60),
|
||||
((double) buf.tms_stime) / clk_tck,
|
||||
(int) (buf.tms_cutime / clk_tck / 60),
|
||||
((double) buf.tms_cutime) / clk_tck,
|
||||
(int) (buf.tms_cstime / clk_tck / 60),
|
||||
((double) buf.tms_cstime) / clk_tck);
|
||||
|
||||
times_fmt(u, buf.tms_utime, clk_tck);
|
||||
times_fmt(s, buf.tms_stime, clk_tck);
|
||||
times_fmt(cu, buf.tms_cutime, clk_tck);
|
||||
times_fmt(cs, buf.tms_cstime, clk_tck);
|
||||
|
||||
printf("%s %s\n%s %s\n", u, s, cu, cs);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
29
shell/msh_test/TODO_bug846
Normal file
29
shell/msh_test/TODO_bug846
Normal file
@ -0,0 +1,29 @@
|
||||
#!/bin/sh
|
||||
# For future msh testsuite:
|
||||
# Testcase for http://bugs.busybox.net/view.php?id=846
|
||||
|
||||
n=0
|
||||
while :
|
||||
do
|
||||
echo A
|
||||
while :
|
||||
do
|
||||
echo B
|
||||
break
|
||||
done
|
||||
echo iteration
|
||||
[ $n = 1 ] && break
|
||||
echo C
|
||||
n=`expr $n + 1`
|
||||
done
|
||||
echo D
|
||||
|
||||
# output should be:
|
||||
# A
|
||||
# B
|
||||
# iteration
|
||||
# C
|
||||
# A
|
||||
# B
|
||||
# iteration
|
||||
# D
|
||||
Loading…
Reference in New Issue
Block a user