f01de9656d
../src/shared/unit-name.c:462: error: undefined reference to 'sd_bus_label_escape' ../src/shared/unit-name.c:477: error: undefined reference to 'sd_bus_label_unescape' collect2: error: ld returned 1 exit status
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "util.h"
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#include "macro.h"
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#include "def.h"
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#include "bus-label.h"
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char *bus_label_escape(const char *s) {
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char *r, *t;
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const char *f;
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assert_return(s, NULL);
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/* Escapes all chars that D-Bus' object path cannot deal
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* with. Can be reversed with bus_path_unescape(). We special
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* case the empty string. */
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if (*s == 0)
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return strdup("_");
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r = new(char, strlen(s)*3 + 1);
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if (!r)
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return NULL;
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for (f = s, t = r; *f; f++) {
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/* Escape everything that is not a-zA-Z0-9. We also
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* escape 0-9 if it's the first character */
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if (!(*f >= 'A' && *f <= 'Z') &&
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!(*f >= 'a' && *f <= 'z') &&
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!(f > s && *f >= '0' && *f <= '9')) {
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*(t++) = '_';
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*(t++) = hexchar(*f >> 4);
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*(t++) = hexchar(*f);
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} else
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*(t++) = *f;
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}
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*t = 0;
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return r;
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}
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char *bus_label_unescape(const char *f) {
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char *r, *t;
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assert_return(f, NULL);
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/* Special case for the empty string */
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if (streq(f, "_"))
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return strdup("");
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r = new(char, strlen(f) + 1);
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if (!r)
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return NULL;
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for (t = r; *f; f++) {
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if (*f == '_') {
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int a, b;
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if ((a = unhexchar(f[1])) < 0 ||
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(b = unhexchar(f[2])) < 0) {
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/* Invalid escape code, let's take it literal then */
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*(t++) = '_';
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} else {
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*(t++) = (char) ((a << 4) | b);
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f += 2;
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}
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} else
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*(t++) = *f;
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}
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*t = 0;
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return r;
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}
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