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https://github.com/libguestfs/libguestfs.git
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102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../src/guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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char *
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do_command (char * const * const argv)
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{
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char *out, *err;
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int r;
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/* We need a root filesystem mounted to do this. */
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NEED_ROOT (NULL);
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/* Conveniently, argv is already a NULL-terminated argv-style array
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* of parameters, so we can pass it straight in to our internal
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* commandv. We just have to check the list is non-empty.
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*/
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if (argv[0] == NULL) {
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reply_with_error ("command: passed an empty list");
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return NULL;
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}
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CHROOT_IN;
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r = commandv (&out, &err, argv);
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CHROOT_OUT;
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if (r == -1) {
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reply_with_error ("%s", err);
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free (out);
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free (err);
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return NULL;
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}
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free (err);
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return out; /* Caller frees. */
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}
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char **
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do_command_lines (char * const * const argv)
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{
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char *out;
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char **lines = NULL;
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int size = 0, alloc = 0;
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char *p, *pend;
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out = do_command (argv);
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if (out == NULL)
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return NULL;
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/* Now convert the output to a list of lines. */
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p = out;
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while (p) {
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pend = strchr (p, '\n');
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if (pend) {
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*pend = '\0';
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pend++;
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/* Final \n? Don't return an empty final element. */
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if (*pend == '\0') break;
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}
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if (add_string (&lines, &size, &alloc, p) == -1) {
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free (out);
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return NULL;
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}
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p = pend;
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}
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free (out);
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if (add_string (&lines, &size, &alloc, NULL) == -1)
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return NULL;
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return lines; /* Caller frees. */
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}
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