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