126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
|
/* Shell command argument quoting.
|
||
|
|
Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
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, 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; see the file COPYING.
|
||
|
|
If not, write to the Free Software Foundation,
|
||
|
|
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
/* Written by Paul Eggert <eggert@twinsun.com> */
|
||
|
|
|
||
|
|
#if HAVE_CONFIG_H
|
||
|
|
# include <config.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <quotearg.h>
|
||
|
|
|
||
|
|
/* Place into QUOTED a quoted version of ARG suitable for `system'.
|
||
|
|
Return the length of the resulting string (which is not null-terminated).
|
||
|
|
If QUOTED is null, return the length without any side effects. */
|
||
|
|
|
||
|
|
size_t
|
||
|
|
quote_system_arg (quoted, arg)
|
||
|
|
char *quoted;
|
||
|
|
char const *arg;
|
||
|
|
{
|
||
|
|
char const *a;
|
||
|
|
size_t len = 0;
|
||
|
|
|
||
|
|
/* Scan ARG, copying it to QUOTED if QUOTED is not null,
|
||
|
|
looking for shell metacharacters. */
|
||
|
|
|
||
|
|
for (a = arg; ; a++)
|
||
|
|
{
|
||
|
|
char c = *a;
|
||
|
|
switch (c)
|
||
|
|
{
|
||
|
|
case 0:
|
||
|
|
/* ARG has no shell metacharacters. */
|
||
|
|
return len;
|
||
|
|
|
||
|
|
case '=':
|
||
|
|
if (*arg == '-')
|
||
|
|
break;
|
||
|
|
/* Fall through. */
|
||
|
|
case '\t': case '\n': case ' ':
|
||
|
|
case '!': case '"': case '#': case '$': case '%': case '&': case '\'':
|
||
|
|
case '(': case ')': case '*': case ';':
|
||
|
|
case '<': case '>': case '?': case '[': case '\\':
|
||
|
|
case '^': case '`': case '|': case '~':
|
||
|
|
{
|
||
|
|
/* ARG has a shell metacharacter.
|
||
|
|
Start over, quoting it this time. */
|
||
|
|
|
||
|
|
len = 0;
|
||
|
|
c = *arg++;
|
||
|
|
|
||
|
|
/* If ARG is an option, quote just its argument.
|
||
|
|
This is not necessary, but it looks nicer. */
|
||
|
|
if (c == '-' && arg < a)
|
||
|
|
{
|
||
|
|
c = *arg++;
|
||
|
|
|
||
|
|
if (quoted)
|
||
|
|
{
|
||
|
|
quoted[len] = '-';
|
||
|
|
quoted[len + 1] = c;
|
||
|
|
}
|
||
|
|
len += 2;
|
||
|
|
|
||
|
|
if (c == '-')
|
||
|
|
while (arg < a)
|
||
|
|
{
|
||
|
|
c = *arg++;
|
||
|
|
if (quoted)
|
||
|
|
quoted[len] = c;
|
||
|
|
len++;
|
||
|
|
if (c == '=')
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
c = *arg++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (quoted)
|
||
|
|
quoted[len] = '\'';
|
||
|
|
len++;
|
||
|
|
|
||
|
|
for (; c; c = *arg++)
|
||
|
|
{
|
||
|
|
if (c == '\'')
|
||
|
|
{
|
||
|
|
if (quoted)
|
||
|
|
{
|
||
|
|
quoted[len] = '\'';
|
||
|
|
quoted[len + 1] = '\\';
|
||
|
|
quoted[len + 2] = '\'';
|
||
|
|
}
|
||
|
|
len += 3;
|
||
|
|
}
|
||
|
|
if (quoted)
|
||
|
|
quoted[len] = c;
|
||
|
|
len++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (quoted)
|
||
|
|
quoted[len] = '\'';
|
||
|
|
return len + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (quoted)
|
||
|
|
quoted[len] = c;
|
||
|
|
len++;
|
||
|
|
}
|
||
|
|
}
|