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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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777
findutils/xargs.c
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@ -65,52 +65,52 @@
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 {
/* vfork -- parent */
int status;
while (wait(&status) == (pid_t) - 1)
if (errno != EINTR)
break;
if (exec_errno) {
errno = exec_errno;
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]);
return 124;
}
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));
return 125;
}
if (WEXITSTATUS(status) != 0)
return 123;
return 0;
}
}
} else { } else {
/* vfork -- parent */ bb_perror_msg_and_die("vfork");
int status;
while (wait (&status) == (pid_t) - 1)
if (errno != EINTR)
break;
if (exec_errno) {
errno = exec_errno;
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]);
return 124;
}
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));
return 125;
}
if (WEXITSTATUS (status) != 0)
return 123;
return 0;
}
} }
} else {
bb_perror_msg_and_die ("vfork");
}
} }
@ -127,207 +127,208 @@ 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
#define BACKSLASH 2 #define BACKSLASH 2
#define SPACE 4 #define SPACE 4
char *s = NULL; /* start word */ char *s = NULL; /* start word */
char *p = NULL; /* pointer to end word */ char *p = NULL; /* pointer to end word */
char q = 0; /* quote char */ char q = 0; /* quote char */
char state = NORM; char state = NORM;
char eof_str_detected = 0; char eof_str_detected = 0;
size_t line_l = 0; /* size loaded args line */ size_t line_l = 0; /* size loaded args line */
int c; /* current char */ int c; /* current char */
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) {
c = getchar();
if(c == EOF) {
eof_stdin_detected++;
if(s)
goto unexpected_eof;
break;
} }
if(eof_str_detected)
continue; while (!eof_stdin_detected) {
if (state == BACKSLASH) { c = getchar();
state = NORM; if (c == EOF) {
goto set; eof_stdin_detected++;
} else if (state == QUOTE) { if (s)
if (c == q) { goto unexpected_eof;
q = 0; break;
state = NORM;
} else {
goto set;
}
} else /* if(state == NORM) */ {
if (ISSPACE (c)) {
if (s) {
unexpected_eof:
state = SPACE;
c = 0;
goto set;
} }
} else { if (eof_str_detected)
if (s == NULL) continue;
s = p = buf; if (state == BACKSLASH) {
if (c == '\\') { state = NORM;
state = BACKSLASH; goto set;
} else if (c == '\'' || c == '"') { } else if (state == QUOTE) {
q = c; if (c == q) {
state = QUOTE; q = 0;
} else { state = NORM;
set: } else {
if( (p-buf) >= mc) goto set;
bb_error_msg_and_die ("argument line too long"); }
*p++ = c; } else { /* if(state == NORM) */
}
}
}
if (state == SPACE) { /* word's delimiter or EOF detected */
if (q)
bb_error_msg_and_die ("unmatched %s quote",
q == '\'' ? "single" : "double");
/* word loaded */
if(eof_str) {
eof_str_detected = strcmp(s, eof_str) == 0;
}
if(!eof_str_detected) {
size_t lenght = (p-buf);
cur = xmalloc(sizeof(xlist_t) + lenght); if (ISSPACE(c)) {
cur->data = memcpy(cur + 1, s, lenght); if (s) {
cur->lenght = lenght; unexpected_eof:
cur->link = NULL; state = SPACE;
if(prev == NULL) { c = 0;
list_arg = cur; goto set;
} else { }
prev->link = cur; } else {
} if (s == NULL)
prev = cur; s = p = buf;
line_l += lenght; if (c == '\\') {
if(line_l > mc) { state = BACKSLASH;
/* stop memory usage :-) */ } else if (c == '\'' || c == '"') {
break; q = c;
} state = QUOTE;
} } else {
s = NULL; set:
state = NORM; 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",
q == '\'' ? "single" : "double");
/* word loaded */
if (eof_str) {
eof_str_detected = strcmp(s, eof_str) == 0;
}
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) {
list_arg = cur;
} else {
prev->link = cur;
}
prev = cur;
line_l += lenght;
if (line_l > mc) {
/* stop memory usage :-) */
break;
}
}
s = NULL;
state = NORM;
}
} }
} return list_arg;
return list_arg;
} }
#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 */
int eof_str_detected = 0; int eof_str_detected = 0;
char *s = NULL; /* start word */ char *s = NULL; /* start word */
char *p = NULL; /* pointer to end word */ char *p = NULL; /* pointer to end word */
size_t line_l = 0; /* size loaded args line */ size_t line_l = 0; /* size loaded args line */
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) {
c = getchar();
if(c == EOF) {
eof_stdin_detected++;
} }
if(eof_str_detected)
continue;
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");
*p++ = c == EOF ? 0 : c;
if (c == EOF) { /* word's delimiter or EOF detected */
/* word loaded */
if(eof_str) {
eof_str_detected = strcmp(s, eof_str) == 0;
}
if(!eof_str_detected) {
size_t lenght = (p-buf);
cur = xmalloc(sizeof(xlist_t) + lenght); while (!eof_stdin_detected) {
cur->data = memcpy(cur + 1, s, lenght); c = getchar();
cur->lenght = lenght; if (c == EOF) {
cur->link = NULL; eof_stdin_detected++;
if(prev == NULL) {
list_arg = cur;
} else {
prev->link = cur;
} }
prev = cur; if (eof_str_detected)
line_l += lenght; continue;
if(line_l > mc) { if (c == EOF || ISSPACE(c)) {
/* stop memory usage :-) */ if (s == NULL)
break; continue;
c = EOF;
}
if (s == NULL)
s = p = buf;
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) {
eof_str_detected = strcmp(s, eof_str) == 0;
}
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) {
list_arg = cur;
} else {
prev->link = cur;
}
prev = cur;
line_l += lenght;
if (line_l > mc) {
/* stop memory usage :-) */
break;
}
s = NULL;
}
} }
s = NULL;
}
} }
} return list_arg;
return list_arg;
} }
#endif /* CONFIG_FEATURE_XARGS_SUPPORT_QUOTES */ #endif /* CONFIG_FEATURE_XARGS_SUPPORT_QUOTES */
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION #ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
/* 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
# define xargs_ask_confirmation() 1 # define xargs_ask_confirmation() 1
#endif /* CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION */ #endif /* CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION */
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT #ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
# define OPT_INC_X 1 # define OPT_INC_X 1
@ -336,65 +337,66 @@ 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 */
char *p = NULL; /* pointer to end word */ char *p = NULL; /* pointer to end word */
size_t line_l = 0; /* size loaded args line */ size_t line_l = 0; /* size loaded args line */
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) {
c = getchar();
if(c == EOF) {
eof_stdin_detected++;
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");
*p++ = c;
if (c == 0) { /* word's delimiter or EOF detected */
/* word loaded */
size_t lenght = (p-buf);
cur = xmalloc(sizeof(xlist_t) + lenght); while (!eof_stdin_detected) {
cur->data = memcpy(cur + 1, s, lenght); c = getchar();
cur->lenght = lenght; if (c == EOF) {
cur->link = NULL; eof_stdin_detected++;
if(prev == NULL) { if (s == NULL)
list_arg = cur; break;
} else { c = 0;
prev->link = cur;
} }
prev = cur; if (s == NULL)
line_l += lenght; s = p = buf;
if(line_l > mc) { if ((p - buf) >= mc)
/* stop memory usage :-) */ bb_error_msg_and_die("argument line too long");
break; *p++ = c;
if (c == 0) { /* word's delimiter or EOF detected */
/* word loaded */
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) {
list_arg = cur;
} else {
prev->link = cur;
}
prev = cur;
line_l += lenght;
if (line_l > mc) {
/* stop memory usage :-) */
break;
}
s = NULL;
} }
s = NULL;
} }
} 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
# define OPT_INC_0 0 /* future use */ # define OPT_INC_0 0 /* future use */
# define READ_ARGS(l, e, nmc, mc) process_stdin(l, e, nmc, mc) # define READ_ARGS(l, e, nmc, mc) process_stdin(l, e, nmc, mc)
#endif /* CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM */ #endif /* CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM */
#define OPT_VERBOSE (1<<0) #define OPT_VERBOSE (1<<0)
@ -405,7 +407,7 @@ process0_stdin (xlist_t *list_arg, const char *eof_str, size_t mc, char *buf)
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION #ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
#define OPT_INTERACTIVE (1<<5) #define OPT_INTERACTIVE (1<<5)
#else #else
#define OPT_INTERACTIVE (0) /* require for algorithm &| */ #define OPT_INTERACTIVE (0) /* require for algorithm &| */
#endif #endif
#define OPT_TERMINATE (1<<(5+OPT_INC_P)) #define OPT_TERMINATE (1<<(5+OPT_INC_P))
#define OPT_ZEROTERM (1<<(5+OPT_INC_P+OPT_INC_X)) #define OPT_ZEROTERM (1<<(5+OPT_INC_P+OPT_INC_X))
@ -413,153 +415,154 @@ 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;
xlist_t *list = NULL; xlist_t *list = NULL;
xlist_t *cur; xlist_t *cur;
int child_error = 0; int child_error = 0;
char *max_args, *max_chars; char *max_args, *max_chars;
int n_max_arg; int n_max_arg;
size_t n_chars = 0; size_t n_chars = 0;
long orig_arg_max; long orig_arg_max;
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
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT #ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
"x" "x"
#endif #endif
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM #ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
"0" "0"
#endif #endif
, &max_args, &max_chars, &eof_str); , &max_args, &max_chars, &eof_str);
a = argc - optind; a = argc - optind;
argv += optind; argv += optind;
if (a == 0) { if (a == 0) {
/* default behavior is to echo all the filenames */ /* default behavior is to echo all the filenames */
*argv = "echo"; *argv = "echo";
a++; a++;
}
orig_arg_max = ARG_MAX;
if (orig_arg_max == -1)
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);
for (i = 0; i < a; i++) {
n_chars += strlen (*argv) + 1;
}
if (n_max_chars < n_chars) {
bb_error_msg_and_die
("can not fit single argument within argument list size limit");
}
n_max_chars -= n_chars;
} else {
/* Sanity check for systems with huge ARG_MAX defines (e.g., Suns which
have it at 1 meg). Things will work fine with a large ARG_MAX but it
will probably hurt the system more than it needs to; an array of this
size is allocated. */
if (orig_arg_max > 20 * 1024)
orig_arg_max = 20 * 1024;
n_max_chars = orig_arg_max;
}
max_chars = xmalloc(n_max_chars);
if ((opt & OPT_UPTO_NUMBER)) {
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)
read_args = process0_stdin;
#endif
while ((list = READ_ARGS(list, eof_str, n_max_chars, max_chars)) != NULL
|| (opt & OPT_NO_EMPTY) == 0) {
opt |= OPT_NO_EMPTY;
n = 0;
n_chars = 0;
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
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");
break;
}
}
#else
for (cur = list; cur; cur = cur->link) {
n_chars += cur->lenght;
n++;
if (n_chars > n_max_chars || n == n_max_arg) {
break;
}
}
#endif /* CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT */
/* allocating pointers for execvp:
a*arg, n*arg from stdin, NULL */
args = xcalloc (n + a + 1, sizeof (char *));
/* Store the command to be executed
(taken from the command line) */
for (i = 0; i < a; i++)
args[i] = argv[i];
/* (taken from stdin) */
for (cur = list; n; cur = cur->link) {
args[i++] = cur->data;
n--;
} }
if ((opt & (OPT_INTERACTIVE|OPT_VERBOSE))) { orig_arg_max = ARG_MAX;
for (i = 0; args[i]; i++) { if (orig_arg_max == -1)
if (i) orig_arg_max = LONG_MAX;
fputc (' ', stderr); orig_arg_max -= 2048; /* POSIX.2 requires subtracting 2048. */
fputs (args[i], stderr); if ((opt & OPT_UPTO_SIZE)) {
n_max_chars = bb_xgetularg10_bnd(max_chars, 1, orig_arg_max);
for (i = 0; i < a; i++) {
n_chars += strlen(*argv) + 1;
} }
if((opt & OPT_INTERACTIVE) == 0) if (n_max_chars < n_chars) {
fputc ('\n', stderr); bb_error_msg_and_die
("can not fit single argument within argument list size limit");
}
n_max_chars -= n_chars;
} else {
/* Sanity check for systems with huge ARG_MAX defines (e.g., Suns which
have it at 1 meg). Things will work fine with a large ARG_MAX but it
will probably hurt the system more than it needs to; an array of this
size is allocated. */
if (orig_arg_max > 20 * 1024)
orig_arg_max = 20 * 1024;
n_max_chars = orig_arg_max;
} }
if ((opt & OPT_INTERACTIVE) == 0 || xargs_ask_confirmation () != 0) { max_chars = xmalloc(n_max_chars);
child_error = xargs_exec (args);
if ((opt & OPT_UPTO_NUMBER)) {
n_max_arg = bb_xgetularg10_bnd(max_args, 1, INT_MAX);
} else {
n_max_arg = n_max_chars;
} }
/* clean up */ #ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
for (i = a; args[i]; i++) { if (opt & OPT_ZEROTERM)
cur = list; read_args = process0_stdin;
list = list->link;
free (cur);
}
free (args);
if (child_error > 0 && child_error != 123) {
break;
}
}
#ifdef CONFIG_FEATURE_CLEAN_UP
free(max_chars);
#endif #endif
return child_error;
while ((list = READ_ARGS(list, eof_str, n_max_chars, max_chars)) != NULL
|| (opt & OPT_NO_EMPTY) == 0) {
opt |= OPT_NO_EMPTY;
n = 0;
n_chars = 0;
#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
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");
break;
}
}
#else
for (cur = list; cur; cur = cur->link) {
n_chars += cur->lenght;
n++;
if (n_chars > n_max_chars || n == n_max_arg) {
break;
}
}
#endif /* CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT */
/* allocating pointers for execvp:
a*arg, n*arg from stdin, NULL */
args = xcalloc(n + a + 1, sizeof(char *));
/* Store the command to be executed
(taken from the command line) */
for (i = 0; i < a; i++)
args[i] = argv[i];
/* (taken from stdin) */
for (cur = list; n; cur = cur->link) {
args[i++] = cur->data;
n--;
}
if ((opt & (OPT_INTERACTIVE | OPT_VERBOSE))) {
for (i = 0; args[i]; i++) {
if (i)
fputc(' ', stderr);
fputs(args[i], stderr);
}
if ((opt & OPT_INTERACTIVE) == 0)
fputc('\n', stderr);
}
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(args);
if (child_error > 0 && child_error != 123) {
break;
}
}
#ifdef CONFIG_FEATURE_CLEAN_UP
free(max_chars);
#endif
return child_error;
} }
@ -569,12 +572,14 @@ 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,
exit(1); "Usage: %s [-p] [-r] [-t] -[x] [-n max_arg] [-s max_chars]\n",
bb_applet_name);
exit(1);
} }
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
return xargs_main(argc, argv); return xargs_main(argc, argv);
} }
#endif /* TEST */ #endif /* TEST */