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This commit is contained in:
Glenn L McGrath
2003-10-30 22:47:16 +00:00
parent 00ed36fd52
commit 09c295a5bc
1 changed files with 391 additions and 386 deletions
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193
findutils/xargs.c
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@@ -65,51 +65,51 @@
This function have special algorithm.
Don`t use fork and include to main!
*/
static int
xargs_exec (char *const *args)
static int xargs_exec(char *const *args)
{
pid_t p;
volatile int exec_errno = 0; /* shared vfork stack */
if ((p = vfork ()) >= 0) {
if ((p = vfork()) >= 0) {
if (p == 0) {
/* vfork -- child */
execvp (args[0], args);
execvp(args[0], args);
exec_errno = errno; /* set error to shared stack */
_exit (1);
_exit(1);
} else {
/* vfork -- parent */
int status;
while (wait (&status) == (pid_t) - 1)
while (wait(&status) == (pid_t) - 1)
if (errno != EINTR)
break;
if (exec_errno) {
errno = exec_errno;
bb_perror_msg ("%s", args[0]);
bb_perror_msg("%s", args[0]);
return exec_errno == ENOENT ? 127 : 126;
} else {
if (WEXITSTATUS (status) == 255) {
bb_error_msg ("%s: exited with status 255; aborting", args[0]);
if (WEXITSTATUS(status) == 255) {
bb_error_msg("%s: exited with status 255; aborting",
args[0]);
return 124;
}
if (WIFSTOPPED (status)) {
bb_error_msg ("%s: stopped by signal %d", args[0],
WSTOPSIG (status));
if (WIFSTOPPED(status)) {
bb_error_msg("%s: stopped by signal %d", args[0],
WSTOPSIG(status));
return 125;
}
if (WIFSIGNALED (status)) {
bb_error_msg ("%s: terminated by signal %d", args[0],
WTERMSIG (status));
if (WIFSIGNALED(status)) {
bb_error_msg("%s: terminated by signal %d", args[0],
WTERMSIG(status));
return 125;
}
if (WEXITSTATUS (status) != 0)
if (WEXITSTATUS(status) != 0)
return 123;
return 0;
}
}
} else {
bb_perror_msg_and_die ("vfork");
bb_perror_msg_and_die("vfork");
}
}
@@ -127,8 +127,8 @@ static int eof_stdin_detected;
|| (c) == '\f' || (c) == '\v')
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
static xlist_t *
process_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
static xlist_t *process_stdin(xlist_t * list_arg, const char *eof_str,
size_t mc, char *buf)
{
#define NORM 0
#define QUOTE 1
@@ -145,21 +145,21 @@ process_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
xlist_t *cur;
xlist_t *prev;
for(prev = cur = list_arg; cur; cur = cur->link) {
for (prev = cur = list_arg; cur; cur = cur->link) {
line_l += cur->lenght; /* previous allocated */
if(prev != cur)
if (prev != cur)
prev = prev->link;
}
while(!eof_stdin_detected) {
while (!eof_stdin_detected) {
c = getchar();
if(c == EOF) {
if (c == EOF) {
eof_stdin_detected++;
if(s)
if (s)
goto unexpected_eof;
break;
}
if(eof_str_detected)
if (eof_str_detected)
continue;
if (state == BACKSLASH) {
state = NORM;
@@ -171,10 +171,11 @@ process_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
} else {
goto set;
}
} else /* if(state == NORM) */ {
if (ISSPACE (c)) {
} else { /* if(state == NORM) */
if (ISSPACE(c)) {
if (s) {
unexpected_eof:
unexpected_eof:
state = SPACE;
c = 0;
goto set;
@@ -188,36 +189,36 @@ unexpected_eof:
q = c;
state = QUOTE;
} else {
set:
if( (p-buf) >= mc)
bb_error_msg_and_die ("argument line too long");
set:
if ((p - buf) >= mc)
bb_error_msg_and_die("argument line too long");
*p++ = c;
}
}
}
if (state == SPACE) { /* word's delimiter or EOF detected */
if (q)
bb_error_msg_and_die ("unmatched %s quote",
bb_error_msg_and_die("unmatched %s quote",
q == '\'' ? "single" : "double");
/* word loaded */
if(eof_str) {
if (eof_str) {
eof_str_detected = strcmp(s, eof_str) == 0;
}
if(!eof_str_detected) {
size_t lenght = (p-buf);
if (!eof_str_detected) {
size_t lenght = (p - buf);
cur = xmalloc(sizeof(xlist_t) + lenght);
cur->data = memcpy(cur + 1, s, lenght);
cur->lenght = lenght;
cur->link = NULL;
if(prev == NULL) {
if (prev == NULL) {
list_arg = cur;
} else {
prev->link = cur;
}
prev = cur;
line_l += lenght;
if(line_l > mc) {
if (line_l > mc) {
/* stop memory usage :-) */
break;
}
@@ -230,8 +231,8 @@ set:
}
#else
/* The variant is unsupport single, double quotes and backslash */
static xlist_t *
process_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
static xlist_t *process_stdin(xlist_t * list_arg, const char *eof_str,
size_t mc, char *buf)
{
int c; /* current char */
@@ -242,49 +243,49 @@ process_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
xlist_t *cur;
xlist_t *prev;
for(prev = cur = list_arg; cur; cur = cur->link) {
for (prev = cur = list_arg; cur; cur = cur->link) {
line_l += cur->lenght; /* previous allocated */
if(prev != cur)
if (prev != cur)
prev = prev->link;
}
while(!eof_stdin_detected) {
while (!eof_stdin_detected) {
c = getchar();
if(c == EOF) {
if (c == EOF) {
eof_stdin_detected++;
}
if(eof_str_detected)
if (eof_str_detected)
continue;
if (c == EOF || ISSPACE (c)) {
if(s == NULL)
if (c == EOF || ISSPACE(c)) {
if (s == NULL)
continue;
c = EOF;
}
if (s == NULL)
s = p = buf;
if( (p-buf) >= mc)
bb_error_msg_and_die ("argument line too long");
if ((p - buf) >= mc)
bb_error_msg_and_die("argument line too long");
*p++ = c == EOF ? 0 : c;
if (c == EOF) { /* word's delimiter or EOF detected */
/* word loaded */
if(eof_str) {
if (eof_str) {
eof_str_detected = strcmp(s, eof_str) == 0;
}
if(!eof_str_detected) {
size_t lenght = (p-buf);
if (!eof_str_detected) {
size_t lenght = (p - buf);
cur = xmalloc(sizeof(xlist_t) + lenght);
cur->data = memcpy(cur + 1, s, lenght);
cur->lenght = lenght;
cur->link = NULL;
if(prev == NULL) {
if (prev == NULL) {
list_arg = cur;
} else {
prev->link = cur;
}
prev = cur;
line_l += lenght;
if(line_l > mc) {
if (line_l > mc) {
/* stop memory usage :-) */
break;
}
@@ -301,28 +302,28 @@ process_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
/* Prompt the user for a response, and
if the user responds affirmatively, return true;
otherwise, return false. Used "/dev/tty", not stdin. */
static int
xargs_ask_confirmation (void)
static int xargs_ask_confirmation(void)
{
static FILE *tty_stream;
int c, savec;
if (!tty_stream) {
tty_stream = fopen ("/dev/tty", "r");
tty_stream = fopen("/dev/tty", "r");
if (!tty_stream)
bb_perror_msg_and_die ("/dev/tty");
bb_perror_msg_and_die("/dev/tty");
/* pranoidal security by vodz */
fcntl(fileno(tty_stream), F_SETFD, FD_CLOEXEC);
}
fputs (" ?...", stderr);
fflush (stderr);
c = savec = getc (tty_stream);
fputs(" ?...", stderr);
fflush(stderr);
c = savec = getc(tty_stream);
while (c != EOF && c != '\n')
c = getc (tty_stream);
c = getc(tty_stream);
if (savec == 'y' || savec == 'Y')
return 1;
return 0;
}
# define OPT_INC_P 1
#else
# define OPT_INC_P 0
@@ -336,8 +337,8 @@ xargs_ask_confirmation (void)
#endif
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
static xlist_t *
process0_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
static xlist_t *process0_stdin(xlist_t * list_arg, const char *eof_str,
size_t mc, char *buf)
{
int c; /* current char */
char *s = NULL; /* start word */
@@ -346,41 +347,41 @@ process0_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
xlist_t *cur;
xlist_t *prev;
for(prev = cur = list_arg; cur; cur = cur->link) {
for (prev = cur = list_arg; cur; cur = cur->link) {
line_l += cur->lenght; /* previous allocated */
if(prev != cur)
if (prev != cur)
prev = prev->link;
}
while(!eof_stdin_detected) {
while (!eof_stdin_detected) {
c = getchar();
if(c == EOF) {
if (c == EOF) {
eof_stdin_detected++;
if(s == NULL)
if (s == NULL)
break;
c = 0;
}
if (s == NULL)
s = p = buf;
if( (p-buf) >= mc)
bb_error_msg_and_die ("argument line too long");
if ((p - buf) >= mc)
bb_error_msg_and_die("argument line too long");
*p++ = c;
if (c == 0) { /* word's delimiter or EOF detected */
/* word loaded */
size_t lenght = (p-buf);
size_t lenght = (p - buf);
cur = xmalloc(sizeof(xlist_t) + lenght);
cur->data = memcpy(cur + 1, s, lenght);
cur->lenght = lenght;
cur->link = NULL;
if(prev == NULL) {
if (prev == NULL) {
list_arg = cur;
} else {
prev->link = cur;
}
prev = cur;
line_l += lenght;
if(line_l > mc) {
if (line_l > mc) {
/* stop memory usage :-) */
break;
}
@@ -389,6 +390,7 @@ process0_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
}
return list_arg;
}
# define READ_ARGS(l, e, nmc, mc) (*read_args)(l, e, nmc, mc)
# define OPT_INC_0 1 /* future use */
#else
@@ -413,8 +415,7 @@ process0_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
#define OPT_NEXT_OTHER (1<<(5+OPT_INC_P+OPT_INC_X+OPT_INC_0))
*/
int
xargs_main (int argc, char **argv)
int xargs_main(int argc, char **argv)
{
char **args;
int i, a, n;
@@ -428,15 +429,17 @@ xargs_main (int argc, char **argv)
const char *eof_str = "_";
unsigned long opt;
size_t n_max_chars;
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
xlist_t * (*read_args) (xlist_t *, const char *, size_t, char *) = process_stdin;
xlist_t *(*read_args) (xlist_t *, const char *, size_t, char *) =
process_stdin;
#endif
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
bb_opt_complementaly = "pt";
#endif
opt = bb_getopt_ulflags (argc, argv, "+trn:s:e::"
opt = bb_getopt_ulflags(argc, argv, "+trn:s:e::"
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
"p"
#endif
@@ -461,9 +464,9 @@ xargs_main (int argc, char **argv)
orig_arg_max = LONG_MAX;
orig_arg_max -= 2048; /* POSIX.2 requires subtracting 2048. */
if ((opt & OPT_UPTO_SIZE)) {
n_max_chars = bb_xgetularg10_bnd (max_chars, 1, orig_arg_max);
n_max_chars = bb_xgetularg10_bnd(max_chars, 1, orig_arg_max);
for (i = 0; i < a; i++) {
n_chars += strlen (*argv) + 1;
n_chars += strlen(*argv) + 1;
}
if (n_max_chars < n_chars) {
bb_error_msg_and_die
@@ -482,13 +485,13 @@ xargs_main (int argc, char **argv)
max_chars = xmalloc(n_max_chars);
if ((opt & OPT_UPTO_NUMBER)) {
n_max_arg = bb_xgetularg10_bnd (max_args, 1, INT_MAX);
n_max_arg = bb_xgetularg10_bnd(max_args, 1, INT_MAX);
} else {
n_max_arg = n_max_chars;
}
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
if(opt & OPT_ZEROTERM)
if (opt & OPT_ZEROTERM)
read_args = process0_stdin;
#endif
@@ -498,13 +501,13 @@ xargs_main (int argc, char **argv)
n = 0;
n_chars = 0;
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
for (cur = list; cur; ) {
for (cur = list; cur;) {
n_chars += cur->lenght;
n++;
cur = cur->link;
if (n_chars > n_max_chars || (n == n_max_arg && cur)) {
if (opt & OPT_TERMINATE)
bb_error_msg_and_die ("argument list too long");
bb_error_msg_and_die("argument list too long");
break;
}
}
@@ -520,7 +523,7 @@ xargs_main (int argc, char **argv)
/* allocating pointers for execvp:
a*arg, n*arg from stdin, NULL */
args = xcalloc (n + a + 1, sizeof (char *));
args = xcalloc(n + a + 1, sizeof(char *));
/* Store the command to be executed
(taken from the command line) */
@@ -532,26 +535,26 @@ xargs_main (int argc, char **argv)
n--;
}
if ((opt & (OPT_INTERACTIVE|OPT_VERBOSE))) {
if ((opt & (OPT_INTERACTIVE | OPT_VERBOSE))) {
for (i = 0; args[i]; i++) {
if (i)
fputc (' ', stderr);
fputs (args[i], stderr);
fputc(' ', stderr);
fputs(args[i], stderr);
}
if((opt & OPT_INTERACTIVE) == 0)
fputc ('\n', stderr);
if ((opt & OPT_INTERACTIVE) == 0)
fputc('\n', stderr);
}
if ((opt & OPT_INTERACTIVE) == 0 || xargs_ask_confirmation () != 0) {
child_error = xargs_exec (args);
if ((opt & OPT_INTERACTIVE) == 0 || xargs_ask_confirmation() != 0) {
child_error = xargs_exec(args);
}
/* clean up */
for (i = a; args[i]; i++) {
cur = list;
list = list->link;
free (cur);
free(cur);
}
free (args);
free(args);
if (child_error > 0 && child_error != 123) {
break;
}
@@ -569,7 +572,9 @@ const char *bb_applet_name = "debug stuff usage";
void bb_show_usage(void)
{
fprintf(stderr, "Usage: %s [-p] [-r] [-t] -[x] [-n max_arg] [-s max_chars]\n", bb_applet_name);
fprintf(stderr,
"Usage: %s [-p] [-r] [-t] -[x] [-n max_arg] [-s max_chars]\n",
bb_applet_name);
exit(1);
}