diff options
Diffstat (limited to 'src/3rd_party/dbus-1.7.8/dbus/dbus-shell.c')
| -rw-r--r-- | src/3rd_party/dbus-1.7.8/dbus/dbus-shell.c | 641 |
1 files changed, 0 insertions, 641 deletions
diff --git a/src/3rd_party/dbus-1.7.8/dbus/dbus-shell.c b/src/3rd_party/dbus-1.7.8/dbus/dbus-shell.c deleted file mode 100644 index 2384961c8e..0000000000 --- a/src/3rd_party/dbus-1.7.8/dbus/dbus-shell.c +++ /dev/null @@ -1,641 +0,0 @@ -/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ -/* dbus-shell.c Shell command line utility functions. - * - * Copyright (C) 2002, 2003 Red Hat, Inc. - * Copyright (C) 2003 CodeFactory AB - * - * Licensed under the Academic Free License version 2.1 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#include <config.h> -#include <string.h> -#include "dbus-internals.h" -#include "dbus-list.h" -#include "dbus-memory.h" -#include "dbus-protocol.h" -#include "dbus-shell.h" -#include "dbus-string.h" - -/* Single quotes preserve the literal string exactly. escape - * sequences are not allowed; not even \' - if you want a ' - * in the quoted text, you have to do something like 'foo'\''bar' - * - * Double quotes allow $ ` " \ and newline to be escaped with backslash. - * Otherwise double quotes preserve things literally. - */ - -static dbus_bool_t -unquote_string_inplace (char* str, char** end) -{ - char* dest; - char* s; - char quote_char; - - dest = s = str; - - quote_char = *s; - - if (!(*s == '"' || *s == '\'')) - { - *end = str; - return FALSE; - } - - /* Skip the initial quote mark */ - ++s; - - if (quote_char == '"') - { - while (*s) - { - _dbus_assert(s > dest); /* loop invariant */ - - switch (*s) - { - case '"': - /* End of the string, return now */ - *dest = '\0'; - ++s; - *end = s; - return TRUE; - - case '\\': - /* Possible escaped quote or \ */ - ++s; - switch (*s) - { - case '"': - case '\\': - case '`': - case '$': - case '\n': - *dest = *s; - ++s; - ++dest; - break; - - default: - /* not an escaped char */ - *dest = '\\'; - ++dest; - /* ++s already done. */ - break; - } - break; - - default: - *dest = *s; - ++dest; - ++s; - break; - } - - _dbus_assert(s > dest); /* loop invariant */ - } - } - else - { - while (*s) - { - _dbus_assert(s > dest); /* loop invariant */ - - if (*s == '\'') - { - /* End of the string, return now */ - *dest = '\0'; - ++s; - *end = s; - return TRUE; - } - else - { - *dest = *s; - ++dest; - ++s; - } - - _dbus_assert(s > dest); /* loop invariant */ - } - } - - /* If we reach here this means the close quote was never encountered */ - - *dest = '\0'; - - *end = s; - return FALSE; -} - -/** - * Unquotes a string as the shell (/bin/sh) would. Only handles - * quotes; if a string contains file globs, arithmetic operators, - * variables, backticks, redirections, or other special-to-the-shell - * features, the result will be different from the result a real shell - * would produce (the variables, backticks, etc. will be passed - * through literally instead of being expanded). This function is - * guaranteed to succeed if applied to the result of - * _dbus_shell_quote(). If it fails, it returns %NULL. - * The @p quoted_string need not actually contain quoted or - * escaped text; _dbus_shell_unquote() simply goes through the string and - * unquotes/unescapes anything that the shell would. Both single and - * double quotes are handled, as are escapes including escaped - * newlines. The return value must be freed with dbus_free(). - * - * Shell quoting rules are a bit strange. Single quotes preserve the - * literal string exactly. escape sequences are not allowed; not even - * \' - if you want a ' in the quoted text, you have to do something - * like 'foo'\''bar'. Double quotes allow $, `, ", \, and newline to - * be escaped with backslash. Otherwise double quotes preserve things - * literally. - * - * @param quoted_string shell-quoted string - **/ -char* -_dbus_shell_unquote (const char *quoted_string) -{ - char *unquoted; - char *end; - char *start; - char *ret; - DBusString retval; - - unquoted = _dbus_strdup (quoted_string); - if (unquoted == NULL) - return NULL; - - start = unquoted; - end = unquoted; - if (!_dbus_string_init (&retval)) - { - dbus_free (unquoted); - return NULL; - } - - /* The loop allows cases such as - * "foo"blah blah'bar'woo foo"baz"la la la\'\''foo' - */ - while (*start) - { - /* Append all non-quoted chars, honoring backslash escape - */ - - while (*start && !(*start == '"' || *start == '\'')) - { - if (*start == '\\') - { - /* all characters can get escaped by backslash, - * except newline, which is removed if it follows - * a backslash outside of quotes - */ - - ++start; - if (*start) - { - if (*start != '\n') - { - if (!_dbus_string_append_byte (&retval, *start)) - goto error; - } - ++start; - } - } - else - { - if (!_dbus_string_append_byte (&retval, *start)) - goto error; - ++start; - } - } - - if (*start) - { - if (!unquote_string_inplace (start, &end)) - goto error; - else - { - if (!_dbus_string_append (&retval, start)) - goto error; - start = end; - } - } - } - - ret = _dbus_strdup (_dbus_string_get_data (&retval)); - if (!ret) - goto error; - - dbus_free (unquoted); - _dbus_string_free (&retval); - - return ret; - - error: - dbus_free (unquoted); - _dbus_string_free (&retval); - return NULL; -} - -/* _dbus_shell_parse_argv() does a semi-arbitrary weird subset of the way - * the shell parses a command line. We don't do variable expansion, - * don't understand that operators are tokens, don't do tilde expansion, - * don't do command substitution, no arithmetic expansion, IFS gets ignored, - * don't do filename globs, don't remove redirection stuff, etc. - * - * READ THE UNIX98 SPEC on "Shell Command Language" before changing - * the behavior of this code. - * - * Steps to parsing the argv string: - * - * - tokenize the string (but since we ignore operators, - * our tokenization may diverge from what the shell would do) - * note that tokenization ignores the internals of a quoted - * word and it always splits on spaces, not on IFS even - * if we used IFS. We also ignore "end of input indicator" - * (I guess this is control-D?) - * - * Tokenization steps, from UNIX98 with operator stuff removed, - * are: - * - * 1) "If the current character is backslash, single-quote or - * double-quote (\, ' or ") and it is not quoted, it will affect - * quoting for subsequent characters up to the end of the quoted - * text. The rules for quoting are as described in Quoting - * . During token recognition no substitutions will be actually - * performed, and the result token will contain exactly the - * characters that appear in the input (except for newline - * character joining), unmodified, including any embedded or - * enclosing quotes or substitution operators, between the quote - * mark and the end of the quoted text. The token will not be - * delimited by the end of the quoted field." - * - * 2) "If the current character is an unquoted newline character, - * the current token will be delimited." - * - * 3) "If the current character is an unquoted blank character, any - * token containing the previous character is delimited and the - * current character will be discarded." - * - * 4) "If the previous character was part of a word, the current - * character will be appended to that word." - * - * 5) "If the current character is a "#", it and all subsequent - * characters up to, but excluding, the next newline character - * will be discarded as a comment. The newline character that - * ends the line is not considered part of the comment. The - * "#" starts a comment only when it is at the beginning of a - * token. Since the search for the end-of-comment does not - * consider an escaped newline character specially, a comment - * cannot be continued to the next line." - * - * 6) "The current character will be used as the start of a new word." - * - * - * - for each token (word), perform portions of word expansion, namely - * field splitting (using default whitespace IFS) and quote - * removal. Field splitting may increase the number of words. - * Quote removal does not increase the number of words. - * - * "If the complete expansion appropriate for a word results in an - * empty field, that empty field will be deleted from the list of - * fields that form the completely expanded command, unless the - * original word contained single-quote or double-quote characters." - * - UNIX98 spec - * - * - */ - -static dbus_bool_t -delimit_token (DBusString *token, - DBusList **retval, - DBusError *error) -{ - char *str; - - str = _dbus_strdup (_dbus_string_get_data (token)); - if (!str) - { - _DBUS_SET_OOM (error); - return FALSE; - } - - if (!_dbus_list_append (retval, str)) - { - dbus_free (str); - _DBUS_SET_OOM (error); - return FALSE; - } - - return TRUE; -} - -static DBusList* -tokenize_command_line (const char *command_line, DBusError *error) -{ - char current_quote; - const char *p; - DBusString current_token; - DBusList *retval = NULL; - dbus_bool_t quoted;; - - current_quote = '\0'; - quoted = FALSE; - p = command_line; - - if (!_dbus_string_init (¤t_token)) - { - _DBUS_SET_OOM (error); - return NULL; - } - - while (*p) - { - if (current_quote == '\\') - { - if (*p == '\n') - { - /* we append nothing; backslash-newline become nothing */ - } - else - { - if (!_dbus_string_append_byte (¤t_token, '\\') || - !_dbus_string_append_byte (¤t_token, *p)) - { - _DBUS_SET_OOM (error); - goto error; - } - } - - current_quote = '\0'; - } - else if (current_quote == '#') - { - /* Discard up to and including next newline */ - while (*p && *p != '\n') - ++p; - - current_quote = '\0'; - - if (*p == '\0') - break; - } - else if (current_quote) - { - if (*p == current_quote && - /* check that it isn't an escaped double quote */ - !(current_quote == '"' && quoted)) - { - /* close the quote */ - current_quote = '\0'; - } - - /* Everything inside quotes, and the close quote, - * gets appended literally. - */ - - if (!_dbus_string_append_byte (¤t_token, *p)) - { - _DBUS_SET_OOM (error); - goto error; - } - } - else - { - switch (*p) - { - case '\n': - if (!delimit_token (¤t_token, &retval, error)) - goto error; - - _dbus_string_free (¤t_token); - - if (!_dbus_string_init (¤t_token)) - { - _DBUS_SET_OOM (error); - goto init_error; - } - - break; - - case ' ': - case '\t': - /* If the current token contains the previous char, delimit - * the current token. A nonzero length - * token should always contain the previous char. - */ - if (_dbus_string_get_length (¤t_token) > 0) - { - if (!delimit_token (¤t_token, &retval, error)) - goto error; - - _dbus_string_free (¤t_token); - - if (!_dbus_string_init (¤t_token)) - { - _DBUS_SET_OOM (error); - goto init_error; - } - - } - - /* discard all unquoted blanks (don't add them to a token) */ - break; - - - /* single/double quotes are appended to the token, - * escapes are maybe appended next time through the loop, - * comment chars are never appended. - */ - - case '\'': - case '"': - if (!_dbus_string_append_byte (¤t_token, *p)) - { - _DBUS_SET_OOM (error); - goto error; - } - - /* FALL THRU */ - - case '#': - case '\\': - current_quote = *p; - break; - - default: - /* Combines rules 4) and 6) - if we have a token, append to it, - * otherwise create a new token. - */ - if (!_dbus_string_append_byte (¤t_token, *p)) - { - _DBUS_SET_OOM (error); - goto error; - } - break; - } - } - - /* We need to count consecutive backslashes mod 2, - * to detect escaped doublequotes. - */ - if (*p != '\\') - quoted = FALSE; - else - quoted = !quoted; - - ++p; - } - - if (!delimit_token (¤t_token, &retval, error)) - goto error; - - if (current_quote) - { - dbus_set_error_const (error, DBUS_ERROR_INVALID_ARGS, "Unclosed quotes in command line"); - goto error; - } - - if (retval == NULL) - { - dbus_set_error_const (error, DBUS_ERROR_INVALID_ARGS, "No tokens found in command line"); - goto error; - } - - _dbus_string_free (¤t_token); - - return retval; - - error: - _dbus_string_free (¤t_token); - - init_error: - if (retval) - { - _dbus_list_foreach (&retval, (DBusForeachFunction) dbus_free, NULL); - _dbus_list_clear (&retval); - } - - return NULL; -} - -/** - * _dbus_shell_parse_argv: - * - * Parses a command line into an argument vector, in much the same way - * the shell would, but without many of the expansions the shell would - * perform (variable expansion, globs, operators, filename expansion, - * etc. are not supported). The results are defined to be the same as - * those you would get from a UNIX98 /bin/sh, as long as the input - * contains none of the unsupported shell expansions. If the input - * does contain such expansions, they are passed through - * literally. Free the returned vector with dbus_free_string_array(). - * - * @param command_line command line to parse - * @param argcp return location for number of args - * @param argvp return location for array of args - * @param error error information - **/ -dbus_bool_t -_dbus_shell_parse_argv (const char *command_line, - int *argcp, - char ***argvp, - DBusError *error) -{ - /* Code based on poptParseArgvString() from libpopt */ - int argc = 0; - char **argv = NULL; - DBusList *tokens = NULL; - int i; - DBusList *tmp_list; - - if (!command_line) - { - _dbus_verbose ("Command line is NULL\n"); - return FALSE; - } - - tokens = tokenize_command_line (command_line, error); - if (tokens == NULL) - { - _dbus_verbose ("No tokens for command line '%s'\n", command_line); - return FALSE; - } - - /* Because we can't have introduced any new blank space into the - * tokens (we didn't do any new expansions), we don't need to - * perform field splitting. If we were going to honor IFS or do any - * expansions, we would have to do field splitting on each word - * here. Also, if we were going to do any expansion we would need to - * remove any zero-length words that didn't contain quotes - * originally; but since there's no expansion we know all words have - * nonzero length, unless they contain quotes. - * - * So, we simply remove quotes, and don't do any field splitting or - * empty word removal, since we know there was no way to introduce - * such things. - */ - - argc = _dbus_list_get_length (&tokens); - argv = dbus_new (char *, argc + 1); - if (!argv) - { - _DBUS_SET_OOM (error); - goto error; - } - - i = 0; - tmp_list = tokens; - while (tmp_list) - { - argv[i] = _dbus_shell_unquote (tmp_list->data); - - if (!argv[i]) - { - int j; - for (j = 0; j < i; j++) - dbus_free(argv[j]); - - dbus_free (argv); - _DBUS_SET_OOM (error); - goto error; - } - - tmp_list = _dbus_list_get_next_link (&tokens, tmp_list); - ++i; - } - argv[argc] = NULL; - - _dbus_list_foreach (&tokens, (DBusForeachFunction) dbus_free, NULL); - _dbus_list_clear (&tokens); - - if (argcp) - *argcp = argc; - - if (argvp) - *argvp = argv; - else - dbus_free_string_array (argv); - - return TRUE; - - error: - _dbus_list_foreach (&tokens, (DBusForeachFunction) dbus_free, NULL); - _dbus_list_clear (&tokens); - - return FALSE; - -} |