eglib/src/gshell.c

   1 /*
   2  * Shell utility functions.
   3  *
   4  * Author:
   5  *   Gonzalo Paniagua Javier (gonzalo@novell.com
   6  *
   7  * (C) 2006 Novell, Inc.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28 #include <stdio.h>
  29 #include <glib.h>
  30
  31 static int
  32 split_cmdline (const gchar *cmdline, GPtrArray *array, GError **error)
  33 {
  34         gchar *ptr;
  35         gchar c;
  36         gboolean in_quote = FALSE;
  37         gboolean escaped = FALSE;
  38         gchar quote_char = '\0';
  39         GString *str;
  40
  41         str = g_string_new ("");
  42         ptr = (gchar *) cmdline;
  43         while ((c = *ptr++) != '\0') {
  44                 if (escaped) {
  45                         escaped = FALSE;
  46                         if (!g_ascii_isspace (c))
  47                                 g_string_append_c (str, c);
  48                 } else if (in_quote) {
  49                         if (c == quote_char) {
  50                                 in_quote = FALSE;
  51                                 quote_char = '\0';
  52                                 g_ptr_array_add (array, g_string_free (str, FALSE));
  53                                 str = g_string_new ("");
  54                         } else {
  55                                 g_string_append_c (str, c);
  56                         }
  57                 } else if (g_ascii_isspace (c)) {
  58                         if (str->len > 0) {
  59                                 g_ptr_array_add (array, g_string_free (str, FALSE));
  60                                 str = g_string_new ("");
  61                         }
  62                 } else if (c == '\\') {
  63                         escaped = TRUE;
  64                 } else if (c == '\'' || c == '"') {
  65                         in_quote = TRUE;
  66                         quote_char = c;
  67                 } else {
  68                         g_string_append_c (str, c);
  69                 }
  70         }
  71
  72         if (escaped) {
  73                 if (error)
  74                         *error = g_error_new (G_LOG_DOMAIN, 0, "Unfinished escape.");
  75                 g_string_free (str, TRUE);
  76                 return -1;
  77         }
  78
  79         if (in_quote) {
  80                 if (error)
  81                         *error = g_error_new (G_LOG_DOMAIN, 0, "Unfinished quote.");
  82                 g_string_free (str, TRUE);
  83                 return -1;
  84         }
  85
  86         if (str->len > 0) {
  87                 g_ptr_array_add (array, g_string_free (str, FALSE));
  88         } else {
  89                 g_string_free (str, TRUE);
  90         }
  91         g_ptr_array_add (array, NULL);
  92         return 0;
  93 }
  94
  95 gboolean
  96 g_shell_parse_argv (const gchar *command_line, gint *argcp, gchar ***argvp, GError **error)
  97 {
  98         GPtrArray *array;
  99         gint argc;
 100         gchar **argv;
 101
 102         g_return_val_if_fail (command_line, FALSE);
 103         g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 104
 105         array = g_ptr_array_new();
 106         if (split_cmdline (command_line, array, error)) {
 107                 g_ptr_array_add (array, NULL);
 108                 g_strfreev ((gchar **) array->pdata);
 109                 g_ptr_array_free (array, FALSE);
 110                 return FALSE;
 111         }
 112
 113         argc = array->len;
 114         argv = (gchar **) array->pdata;
 115
 116         if (argc == 1) {
 117                 g_strfreev (argv);
 118                 g_ptr_array_free (array, FALSE);
 119                 return FALSE;
 120         }
 121
 122         if (argcp) {
 123                 *argcp = array->len - 1;
 124         }
 125
 126         if (argvp) {
 127                 *argvp = argv;
 128         } else {
 129                 g_strfreev (argv);
 130         }
 131
 132         g_ptr_array_free (array, FALSE);
 133         return TRUE;
 134 }
 135
 136 gchar *
 137 g_shell_quote (const gchar *unquoted_string)
 138 {
 139         //g_error ("Not implemented");
 140         return g_strdup (unquoted_string);
 141 //      return NULL;
 142 }
 143
 144 gchar *
 145 g_shell_unquote (const gchar *quoted_string, GError **error)
 146 {
 147 //      g_error ("Not implemented");
 148         return g_strdup (quoted_string);
 149 //      return NULL;
 150 }