a095315b3c
basic/ can be used by everything
cannot use anything outside of basic/
libsystemd/ can use basic/
cannot use shared/
shared/ can use libsystemd/
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2013 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "util.h"
|
|
#include "macro.h"
|
|
|
|
#include "bus-label.h"
|
|
|
|
char *bus_label_escape(const char *s) {
|
|
char *r, *t;
|
|
const char *f;
|
|
|
|
assert_return(s, NULL);
|
|
|
|
/* Escapes all chars that D-Bus' object path cannot deal
|
|
* with. Can be reversed with bus_path_unescape(). We special
|
|
* case the empty string. */
|
|
|
|
if (*s == 0)
|
|
return strdup("_");
|
|
|
|
r = new(char, strlen(s)*3 + 1);
|
|
if (!r)
|
|
return NULL;
|
|
|
|
for (f = s, t = r; *f; f++) {
|
|
|
|
/* Escape everything that is not a-zA-Z0-9. We also
|
|
* escape 0-9 if it's the first character */
|
|
|
|
if (!(*f >= 'A' && *f <= 'Z') &&
|
|
!(*f >= 'a' && *f <= 'z') &&
|
|
!(f > s && *f >= '0' && *f <= '9')) {
|
|
*(t++) = '_';
|
|
*(t++) = hexchar(*f >> 4);
|
|
*(t++) = hexchar(*f);
|
|
} else
|
|
*(t++) = *f;
|
|
}
|
|
|
|
*t = 0;
|
|
|
|
return r;
|
|
}
|
|
|
|
char *bus_label_unescape_n(const char *f, size_t l) {
|
|
char *r, *t;
|
|
size_t i;
|
|
|
|
assert_return(f, NULL);
|
|
|
|
/* Special case for the empty string */
|
|
if (l == 1 && *f == '_')
|
|
return strdup("");
|
|
|
|
r = new(char, l + 1);
|
|
if (!r)
|
|
return NULL;
|
|
|
|
for (i = 0, t = r; i < l; ++i) {
|
|
if (f[i] == '_') {
|
|
int a, b;
|
|
|
|
if (l - i < 3 ||
|
|
(a = unhexchar(f[i + 1])) < 0 ||
|
|
(b = unhexchar(f[i + 2])) < 0) {
|
|
/* Invalid escape code, let's take it literal then */
|
|
*(t++) = '_';
|
|
} else {
|
|
*(t++) = (char) ((a << 4) | b);
|
|
i += 2;
|
|
}
|
|
} else
|
|
*(t++) = f[i];
|
|
}
|
|
|
|
*t = 0;
|
|
|
|
return r;
|
|
}
|