292 lines
6.5 KiB
C
292 lines
6.5 KiB
C
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/*
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* Shell utility functions.
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*
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* Author:
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* Gonzalo Paniagua Javier (gonzalo@novell.com
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*
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* (C) 2006 Novell, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <glib.h>
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static int
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split_cmdline (const gchar *cmdline, GPtrArray *array, GError **error)
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{
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gchar *ptr;
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gchar c;
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gboolean escaped = FALSE, fresh = TRUE;
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gchar quote_char = '\0';
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GString *str;
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str = g_string_new ("");
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ptr = (gchar *) cmdline;
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while ((c = *ptr++) != '\0') {
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if (escaped) {
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/*
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* \CHAR is only special inside a double quote if CHAR is
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* one of: $`"\ and newline
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*/
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if (quote_char == '\"'){
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if (!(c == '$' || c == '`' || c == '"' || c == '\\'))
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g_string_append_c (str, '\\');
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g_string_append_c (str, c);
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} else {
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if (!g_ascii_isspace (c))
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g_string_append_c (str, c);
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}
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escaped = FALSE;
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} else if (quote_char) {
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if (c == quote_char) {
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quote_char = '\0';
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if (fresh && (g_ascii_isspace (*ptr) || *ptr == '\0')){
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g_ptr_array_add (array, g_string_free (str, FALSE));
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str = g_string_new ("");
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}
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} else if (c == '\\'){
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escaped = TRUE;
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} else
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g_string_append_c (str, c);
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} else if (g_ascii_isspace (c)) {
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if (str->len > 0) {
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g_ptr_array_add (array, g_string_free (str, FALSE));
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str = g_string_new ("");
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}
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} else if (c == '\\') {
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escaped = TRUE;
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} else if (c == '\'' || c == '"') {
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fresh = str->len == 0;
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quote_char = c;
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} else {
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g_string_append_c (str, c);
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}
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}
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if (escaped) {
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if (error)
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*error = g_error_new (G_LOG_DOMAIN, 0, "Unfinished escape.");
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g_string_free (str, TRUE);
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return -1;
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}
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if (quote_char) {
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if (error)
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*error = g_error_new (G_LOG_DOMAIN, 0, "Unfinished quote.");
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g_string_free (str, TRUE);
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return -1;
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}
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if (str->len > 0) {
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g_ptr_array_add (array, g_string_free (str, FALSE));
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} else {
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g_string_free (str, TRUE);
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}
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g_ptr_array_add (array, NULL);
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return 0;
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}
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gboolean
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g_shell_parse_argv (const gchar *command_line, gint *argcp, gchar ***argvp, GError **error)
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{
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GPtrArray *array;
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gint argc;
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gchar **argv;
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g_return_val_if_fail (command_line, FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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array = g_ptr_array_new();
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if (split_cmdline (command_line, array, error)) {
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g_ptr_array_add (array, NULL);
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g_strfreev ((gchar **) array->pdata);
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g_ptr_array_free (array, FALSE);
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return FALSE;
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}
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argc = array->len;
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argv = (gchar **) array->pdata;
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if (argc == 1) {
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g_strfreev (argv);
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g_ptr_array_free (array, FALSE);
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return FALSE;
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}
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if (argcp) {
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*argcp = array->len - 1;
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}
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if (argvp) {
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*argvp = argv;
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} else {
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g_strfreev (argv);
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}
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g_ptr_array_free (array, FALSE);
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return TRUE;
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}
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gchar *
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g_shell_quote (const gchar *unquoted_string)
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{
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GString *result = g_string_new ("'");
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const gchar *p;
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for (p = unquoted_string; *p; p++){
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if (*p == '\'')
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g_string_append (result, "'\\'");
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g_string_append_c (result, *p);
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}
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g_string_append_c (result, '\'');
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return g_string_free (result, FALSE);
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}
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gchar *
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g_shell_unquote (const gchar *quoted_string, GError **error)
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{
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GString *result;
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const char *p;
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int do_unquote = 0;
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if (quoted_string == NULL)
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return NULL;
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/* Quickly try to determine if we need to unquote or not */
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for (p = quoted_string; *p; p++){
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if (*p == '\'' || *p == '"' || *p == '\\'){
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do_unquote = 1;
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break;
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}
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}
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if (!do_unquote)
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return g_strdup (quoted_string);
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/* We do need to unquote */
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result = g_string_new ("");
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for (p = quoted_string; *p; p++){
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if (*p == '\''){
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/* Process single quote, not even \ is processed by glib's version */
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for (p++; *p; p++){
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if (*p == '\'')
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break;
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g_string_append_c (result, *p);
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}
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if (!*p){
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g_set_error (error, 0, 0, "Open quote");
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return NULL;
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}
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} else if (*p == '"'){
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/* Process double quote, allows some escaping */
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for (p++; *p; p++){
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if (*p == '"')
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break;
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if (*p == '\\'){
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p++;
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if (*p == 0){
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g_set_error (error, 0, 0, "Open quote");
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return NULL;
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}
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switch (*p){
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case '$':
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case '"':
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case '\\':
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case '`':
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break;
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default:
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g_string_append_c (result, '\\');
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break;
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}
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}
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g_string_append_c (result, *p);
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}
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if (!*p){
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g_set_error (error, 0, 0, "Open quote");
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return NULL;
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}
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} else if (*p == '\\'){
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char c = *(++p);
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if (!(c == '$' || c == '"' || c == '\\' || c == '`' || c == '\'' || c == 0 ))
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g_string_append_c (result, '\\');
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if (c == 0)
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break;
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else
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g_string_append_c (result, c);
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} else
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g_string_append_c (result, *p);
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}
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return g_string_free (result, FALSE);
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}
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#if JOINT_TEST
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/*
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* This test is designed to be built with the 2 glib/eglib to compare
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*/
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char *args [] = {
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"\\",
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"\"Foo'bar\"",
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"'foo'",
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"'fo\'b'",
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"'foo\"bar'",
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"'foo' dingus bar",
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"'foo' 'bar' 'baz'",
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"\"foo\" 'bar' \"baz\"",
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"\"f\\$\\\'",
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"\"\\",
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"\\\\",
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"'\\\\'",
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"\"f\\$\"\\\"\\\\", // /\\\"\\\\"
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"'f\\$'\\\"\\\\",
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"'f\\$\\\\'",
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NULL
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};
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int
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main ()
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{
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char **s = args;
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int i;
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while (*s){
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char *r1 = g_shell_unquote (*s, NULL);
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char *r2 = g2_shell_unquote (*s, NULL);
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char *ok = r1 == r2 ? "ok" : (r1 != NULL && r2 != NULL && strcmp (r1, r2) == 0) ? "ok" : "fail";
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printf ("%s [%s] -> [%s] - [%s]\n", ok, *s, r1, r2);
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s++;
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}
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return;
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char buffer [10];
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buffer [0] = '\"';
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buffer [1] = '\\';
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buffer [3] = '\"';
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buffer [4] = 0;
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for (i = 32; i < 255; i++){
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buffer [2] = i;
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printf ("%d [%s] -> [%s]\n", i, buffer, g_shell_unquote (buffer, NULL));
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}
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}
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#endif
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