+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 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 <errno.h>
-#include <string.h>
-#include <assert.h>
-
-#include "util.h"
-#include "unit-name.h"
-
-#define VALID_CHARS \
- "0123456789" \
- "abcdefghijklmnopqrstuvwxyz" \
- "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
- ":-_.\\"
-
-bool unit_name_is_valid_no_type(const char *n, bool template_ok) {
- const char *e, *i, *at;
-
- /* Valid formats:
- *
- * string@instance.suffix
- * string.suffix
- */
-
- assert(n);
-
- if (strlen(n) >= UNIT_NAME_MAX)
- return false;
-
- e = strrchr(n, '.');
- if (!e || e == n)
- return false;
-
- for (i = n, at = NULL; i < e; i++) {
-
- if (*i == '@' && !at)
- at = i;
-
- if (!strchr("@" VALID_CHARS, *i))
- return false;
- }
-
- if (at) {
- if (at == n)
- return false;
-
- if (!template_ok && at+1 == e)
- return false;
- }
-
- return true;
-}
-
-bool unit_instance_is_valid(const char *i) {
- assert(i);
-
- /* The max length depends on the length of the string, so we
- * don't really check this here. */
-
- if (i[0] == 0)
- return false;
-
- /* We allow additional @ in the instance string, we do not
- * allow them in the prefix! */
-
- for (; *i; i++)
- if (!strchr("@" VALID_CHARS, *i))
- return false;
-
- return true;
-}
-
-bool unit_prefix_is_valid(const char *p) {
-
- /* We don't allow additional @ in the instance string */
-
- if (p[0] == 0)
- return false;
-
- for (; *p; p++)
- if (!strchr(VALID_CHARS, *p))
- return false;
-
- return true;
-}
-
-int unit_name_to_instance(const char *n, char **instance) {
- const char *p, *d;
- char *i;
-
- assert(n);
- assert(instance);
-
- /* Everything past the first @ and before the last . is the instance */
- if (!(p = strchr(n, '@'))) {
- *instance = NULL;
- return 0;
- }
-
- assert_se(d = strrchr(n, '.'));
- assert(p < d);
-
- if (!(i = strndup(p+1, d-p-1)))
- return -ENOMEM;
-
- *instance = i;
- return 0;
-}
-
-char *unit_name_to_prefix_and_instance(const char *n) {
- const char *d;
-
- assert(n);
-
- assert_se(d = strrchr(n, '.'));
-
- return strndup(n, d - n);
-}
-
-char *unit_name_to_prefix(const char *n) {
- const char *p;
-
- if ((p = strchr(n, '@')))
- return strndup(n, p - n);
-
- return unit_name_to_prefix_and_instance(n);
-}
-
-char *unit_name_change_suffix(const char *n, const char *suffix) {
- char *e, *r;
- size_t a, b;
-
- assert(n);
- assert(unit_name_is_valid_no_type(n, true));
- assert(suffix);
-
- assert_se(e = strrchr(n, '.'));
- a = e - n;
- b = strlen(suffix);
-
- if (!(r = new(char, a + b + 1)))
- return NULL;
-
- memcpy(r, n, a);
- memcpy(r+a, suffix, b+1);
-
- return r;
-}
-
-char *unit_name_build(const char *prefix, const char *instance, const char *suffix) {
- assert(prefix);
- assert(unit_prefix_is_valid(prefix));
- assert(!instance || unit_instance_is_valid(instance));
- assert(suffix);
-
- if (!instance)
- return strappend(prefix, suffix);
-
- return join(prefix, "@", instance, suffix, NULL);
-}
-
-static char* do_escape(const char *f, char *t) {
- assert(f);
- assert(t);
-
- for (; *f; f++) {
- if (*f == '/')
- *(t++) = '-';
- else if (*f == '-' || *f == '\\' || !strchr(VALID_CHARS, *f)) {
- *(t++) = '\\';
- *(t++) = 'x';
- *(t++) = hexchar(*f >> 4);
- *(t++) = hexchar(*f);
- } else
- *(t++) = *f;
- }
-
- return t;
-}
-
-char *unit_name_build_escape(const char *prefix, const char *instance, const char *suffix) {
- char *r, *t;
- size_t a, b, c;
-
- assert(prefix);
- assert(suffix);
-
- /* Takes a arbitrary string for prefix and instance plus a
- * suffix and makes a nice string suitable as unit name of it,
- * escaping all weird chars on the way.
- *
- * / becomes ., and all chars not allowed in a unit name get
- * escaped as \xFF, including \ and ., of course. This
- * escaping is hence reversible.
- *
- * This is primarily useful to make nice unit names from
- * strings, but is actually useful for any kind of string.
- */
-
- a = strlen(prefix);
- c = strlen(suffix);
-
- if (instance) {
- b = strlen(instance);
-
- if (!(r = new(char, a*4 + 1 + b*4 + c + 1)))
- return NULL;
-
- t = do_escape(prefix, r);
- *(t++) = '@';
- t = do_escape(instance, t);
- } else {
-
- if (!(r = new(char, a*4 + c + 1)))
- return NULL;
-
- t = do_escape(prefix, r);
- }
-
- strcpy(t, suffix);
- return r;
-}
-
-char *unit_name_escape(const char *f) {
- char *r, *t;
-
- if (!(r = new(char, strlen(f)*4+1)))
- return NULL;
-
- t = do_escape(f, r);
- *t = 0;
-
- return r;
-
-}
-
-char *unit_name_unescape(const char *f) {
- char *r, *t;
-
- assert(f);
-
- if (!(r = strdup(f)))
- return NULL;
-
- for (t = r; *f; f++) {
- if (*f == '-')
- *(t++) = '/';
- else if (*f == '\\') {
- int a, b;
-
- if (f[1] != 'x' ||
- (a = unhexchar(f[2])) < 0 ||
- (b = unhexchar(f[3])) < 0) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- } else {
- *(t++) = (char) ((a << 4) | b);
- f += 3;
- }
- } else
- *(t++) = *f;
- }
-
- *t = 0;
-
- return r;
-}
-
-bool unit_name_is_template(const char *n) {
- const char *p;
-
- assert(n);
-
- if (!(p = strchr(n, '@')))
- return false;
-
- return p[1] == '.';
-}
-
-char *unit_name_replace_instance(const char *f, const char *i) {
- const char *p, *e;
- char *r, *k;
- size_t a;
-
- assert(f);
-
- p = strchr(f, '@');
- assert_se(e = strrchr(f, '.'));
-
- a = p - f;
-
- if (p) {
- size_t b;
-
- b = strlen(i);
-
- if (!(r = new(char, a + 1 + b + strlen(e) + 1)))
- return NULL;
-
- k = mempcpy(r, f, a + 1);
- k = mempcpy(k, i, b);
- } else {
-
- if (!(r = new(char, a + strlen(e) + 1)))
- return NULL;
-
- k = mempcpy(r, f, a);
- }
-
- strcpy(k, e);
- return r;
-}
-
-char *unit_name_template(const char *f) {
- const char *p, *e;
- char *r;
- size_t a;
-
- if (!(p = strchr(f, '@')))
- return strdup(f);
-
- assert_se(e = strrchr(f, '.'));
- a = p - f + 1;
-
- if (!(r = new(char, a + strlen(e) + 1)))
- return NULL;
-
- strcpy(mempcpy(r, f, a), e);
- return r;
-
-}
-
-char *unit_name_from_path(const char *path, const char *suffix) {
- char *p, *r;
-
- assert(path);
- assert(suffix);
-
- if (!(p = strdup(path)))
- return NULL;
-
- path_kill_slashes(p);
-
- path = p[0] == '/' ? p + 1 : p;
-
- if (path[0] == 0) {
- free(p);
- return strappend("-", suffix);
- }
-
- r = unit_name_build_escape(path, NULL, suffix);
- free(p);
-
- return r;
-}
-
-char *unit_name_from_path_instance(const char *prefix, const char *path, const char *suffix) {
- char *p, *r;
-
- assert(path);
- assert(suffix);
-
- if (!(p = strdup(path)))
- return NULL;
-
- path_kill_slashes(p);
-
- path = p[0] == '/' ? p + 1 : p;
-
- if (path[0] == 0) {
- free(p);
- return unit_name_build_escape(prefix, "-", suffix);
- }
-
- r = unit_name_build_escape(prefix, path, suffix);
- free(p);
-
- return r;
-}
-
-char *unit_name_to_path(const char *name) {
- char *w, *e;
-
- assert(name);
-
- if (!(w = unit_name_to_prefix(name)))
- return NULL;
-
- e = unit_name_unescape(w);
- free(w);
-
- if (!e)
- return NULL;
-
- if (e[0] != '/') {
- w = strappend("/", e);
- free(e);
-
- if (!w)
- return NULL;
-
- e = w;
- }
-
- return e;
-}
-
-char *unit_name_path_unescape(const char *f) {
- char *e;
-
- assert(f);
-
- if (!(e = unit_name_unescape(f)))
- return NULL;
-
- if (e[0] != '/') {
- char *w;
-
- w = strappend("/", e);
- free(e);
-
- if (!w)
- return NULL;
-
- e = w;
- }
-
- return e;
-}
~ianmdlvl / elogind.git / blobdiff