mirror of
https://github.com/troglobit/finit.git
synced 2026-10-23 11:44:37 +00:00
Add limited tmpfiles.d(5) support
This change adds very basic tmpfiles.d/ support to Finit. Much of the basic types are supported, but not all, so for now, please check the code for details on what is working. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg committed
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6942e38413
commit
a4af9ba248
22 files changed
+655
-94
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@@ -59,6 +59,7 @@ finit_SOURCES = api.c cgroup.c cgroup.h \
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sig.c sig.h \
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sm.c sm.h \
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svc.c svc.h \
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tmpfiles.c tmpfiles.h \
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tty.c tty.h \
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util.c util.h \
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utmp-api.c utmp-api.h
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+501
@@ -0,0 +1,501 @@
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/* Limited tmpfiles.d implementation
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*
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* Copyright (c) 2023 Joachim Wiberg <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
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* copies of the Software, and to permit persons to whom the Software is
|
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h" /* Generated by configure script */
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#include <sys/sysmacros.h>
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#include "finit.h"
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#include "helpers.h"
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#include "tmpfiles.h"
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#include "util.h"
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static int glob_do(const char *path, int (*cb)(const char *))
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{
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int rc = 0;
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glob_t gl;
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rc = glob(path, GLOB_NOESCAPE, NULL, &gl);
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if (rc) {
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if (rc == GLOB_NOMATCH) {
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errno = ENOENT;
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return -1;
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}
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return 0;
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}
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for (size_t i = 0; i < gl.gl_pathc; i++)
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rc += cb(gl.gl_pathv[i]);
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return rc;
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}
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static int parse_mm(char *arg, int *major, int *minor)
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{
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char *ptr;
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if (!arg) {
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inval:
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errno = EINVAL;
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return -1;
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}
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ptr = strchr(arg, ':');
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if (!ptr)
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goto inval;
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*ptr++ = 0;
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*major = atoi(arg);
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*minor = atoi(ptr);
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if (!*major || !*minor)
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return -1;
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return 0;
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}
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static int do_delete(const char *fpath, const struct stat *sb, int tflag, struct FTW *ftw)
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{
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if (ftw->level == 0)
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return 1;
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if (remove(fpath))
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warn("Failed removing condition %s", fpath);
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return 0;
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}
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static int rmrf(const char *path)
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{
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if (!fisdir(path))
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return 0;
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nftw(path, do_delete, 20, FTW_DEPTH);
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if (remove(path) && errno != ENOENT)
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warn("Failed removing path %s", path);
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return 0;
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}
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static void mkparent(char *path, mode_t mode)
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{
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mkpath(dirname(strdupa(path)), mode);
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}
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static char *write_hex(FILE *fp, char *p)
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{
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unsigned char val;
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char num[4], *ptr;
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int i, len = 0;
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for (i = 0; p[i] && len < 2; i++) {
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char c = p[i];
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if ((c >= '0' && c <= '7') ||
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(c >= 'a' && c <= 'f') ||
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(c >= 'A' && c <= 'F'))
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num[len++] = c;
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else
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break;
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}
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num[len] = 0;
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if (len == 0) {
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fputs("x", fp);
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return p;
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}
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errno = 0;
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val = strtoul(num, &ptr, 16);
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if (errno || ptr == num)
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goto end;
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fputc(val & 0xff, fp);
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end:
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return &p[i];
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}
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static char *write_num(FILE *fp, char *p)
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{
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unsigned char val;
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char num[4], *ptr;
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int i, len = 0;
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for (i = 0; p[i] && len < 3; i++) {
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char c = p[i];
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if (c >= '0' && c <= '7')
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num[len++] = c;
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else
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break;
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}
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num[len] = 0;
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if (len == 0)
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return p;
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errno = 0;
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val = strtoul(num, &ptr, 8);
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if (errno || ptr == num)
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goto end;
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fputc(val & 0xff, fp);
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end:
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return &p[i];
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}
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static void write_arg(FILE *fp, char *arg)
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{
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char *p;
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if (!arg)
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return;
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while (*arg && (p = strchr(arg, '\\'))) {
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fwrite(arg, sizeof(char), p - arg, fp);
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*p++ = 0;
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switch (*p) {
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case '\\':
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fputc('\\', fp);
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arg = p + 1;
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break;
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case '\'':
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fputc('\'', fp);
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arg = p + 1;
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break;
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case '"':
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fputc('"', fp);
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arg = p + 1;
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break;
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case 'a':
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fputc('\a', fp);
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arg = p + 1;
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break;
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case 'b':
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fputc('\b', fp);
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arg = p + 1;
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break;
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case 'e':
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fputc('\e', fp);
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arg = p + 1;
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break;
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case 'n':
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fputc('\n', fp);
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arg = p + 1;
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break;
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case 't':
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fputc('\t', fp);
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arg = p + 1;
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break;
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case 'x':
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arg = write_hex(fp, &p[1]);
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break;
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case '0' ... '7':
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arg = write_num(fp, p);
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break;
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default:
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fputc(*p, fp);
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arg = p + 1;
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break;
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}
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}
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fputs(arg, fp);
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}
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/*
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* The configuration format is one line per path, containing type, path,
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* mode, ownership, age, and argument fields. The lines are separated by
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* newlines, the fields by whitespace:
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*
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* #Type Path Mode User Group Age Argument…
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* d /run/user 0755 root root 10d -
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* L /tmp/foobar - - - - /dev/null
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*
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* https://www.freedesktop.org/software/systemd/man/tmpfiles.d.html
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*/
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static void tmpfiles(char *line)
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{
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char *type, *path, *token, *user, *group, *age, *arg;
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char *dst = NULL, *opts = "";
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int major, minor;
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int strc, rc = 0;
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mode_t mode = 0;
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FILE *fp = NULL;
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struct stat st;
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char buf[1024];
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glob_t gl;
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type = strtok(line, "\t ");
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if (!type)
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return;
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path = strtok(NULL, "\t ");
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if (!path)
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return;
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if (strchr(path, '%')) {
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errx(1, "Path name specifiers unsupported, skipping.");
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return;
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}
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token = strtok(NULL, "\t ");
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if (token) {
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errno = 0;
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mode = strtoul(token, &arg, 8);
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if (errno || arg == token)
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mode = 0;
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}
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user = strtok(NULL, "\t ");
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if (!user || !strcmp(user, "-"))
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user = "root";
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group = strtok(NULL, "\t ");
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if (!group || !strcmp(group, "-"))
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group = "root";
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age = strtok(NULL, "\t ");
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(void)age; /* unused atm. */
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arg = strtok(NULL, "\n");
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strc = stat(path, &st);
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switch (type[0]) {
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case 'b':
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rc = parse_mm(arg, &major, &minor);
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if (rc)
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break;
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if (!strc) {
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if (type[1] != '+')
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break;
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erase(path);
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}
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mkparent(path, 0755);
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rc = blkdev(path, mode ?: 0644, major, minor);
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break;
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case 'c':
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rc = parse_mm(arg, &major, &minor);
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if (rc)
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break;
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if (!strc) {
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if (type[1] != '+')
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break;
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erase(path);
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}
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mkparent(path, 0755);
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rc = chardev(path, mode ?: 0644, major, minor);
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break;
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case 'C':
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if (!arg) {
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paste(buf, sizeof(buf), "/usr/share/factory", path);
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arg = buf;
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}
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if (!strc) {
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struct dirent **namelist;
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int num;
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if (!S_ISDIR(st.st_mode))
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break;
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num = scandir(path, &namelist, NULL, NULL);
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free(namelist);
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if (num >= 3)
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break; /* not empty */
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}
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if (fisdir(arg) && !fisslashdir(arg)) {
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size_t len = strlen(arg) + 2;
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dst = malloc(len);
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if (!dst)
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break;
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snprintf(dst, len, "%s/", arg);
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arg = dst;
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}
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mkparent(path, 0755);
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rc = rsync(arg, path, LITE_FOPT_KEEP_MTIME, NULL);
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if (rc && errno == ENOENT)
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rc = 0;
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if (dst)
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free(dst);
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break;
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case 'd':
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case 'D':
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mkparent(path, 0755);
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rc = mksubsys(path, mode ?: 0755, user, group);
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break;
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case 'e':
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if (glob(path, GLOB_NOESCAPE, NULL, &gl))
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break;
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for (size_t i = 0; i < gl.gl_pathc; i++)
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mksubsys(gl.gl_pathv[i], mode ?: 0755, user, group);
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break;
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case 'f':
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case 'F':
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mkparent(path, 0755);
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if (type[1] == '+' || type[0] == 'F') {
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/* f+/F will create or truncate the file */
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if (!arg) {
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rc = create(path, mode ?: 0644, user, group);
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break;
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}
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fp = fopen(path, "w+");
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} else {
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/* f will create the file if it doesn't exist */
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if (strc)
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fp = fopen(path, "w");
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}
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||||
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if (fp) {
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write_arg(fp, arg);
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rc = fclose(fp);
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}
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break;
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||||
case 'L':
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||||
if (!strc) {
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if (type[1] != '+')
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break;
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||||
erase(path);
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}
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||||
mkparent(path, 0755);
|
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if (!arg) {
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paste(buf, sizeof(buf), "/usr/share/factory", path);
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arg = buf;
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}
|
||||
rc = ln(arg, path);
|
||||
if (rc && errno == EEXIST)
|
||||
rc = 0;
|
||||
break;
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||||
case 'p':
|
||||
if (!strc) {
|
||||
if (type[1] != '+')
|
||||
break;
|
||||
erase(path);
|
||||
}
|
||||
mkparent(path, 0755);
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||||
rc = mkfifo(path, mode ?: 0644);
|
||||
break;
|
||||
case 'r':
|
||||
rc = glob_do(path, erase);
|
||||
if (rc && errno == ENOENT)
|
||||
rc = 0;
|
||||
break;
|
||||
case 'R':
|
||||
rc = glob_do(path, rmrf);
|
||||
break;
|
||||
case 'w':
|
||||
if (!arg)
|
||||
break;
|
||||
|
||||
if (glob(path, GLOB_NOESCAPE, NULL, &gl))
|
||||
break;
|
||||
|
||||
for (size_t i = 0; i < gl.gl_pathc; i++) {
|
||||
fp = fopen(gl.gl_pathv[i], type[1] == '+' ? "a" : "w");
|
||||
if (fp) {
|
||||
write_arg(fp, arg);
|
||||
rc = fclose(fp);
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 'Z':
|
||||
opts = "-R";
|
||||
/* fallthrough */
|
||||
case 'z':
|
||||
if (!whichp("restorecon"))
|
||||
break;
|
||||
if (glob(path, GLOB_NOESCAPE, NULL, &gl))
|
||||
break;
|
||||
|
||||
for (size_t i = 0; i < gl.gl_pathc; i++) {
|
||||
snprintf(buf, sizeof(buf), "restorecon %s %s", opts, gl.gl_pathv[i]);
|
||||
run(buf, "restorecon");
|
||||
}
|
||||
break;
|
||||
default:
|
||||
errx(1, "Unsupported tmpfiles command '%s'", type);
|
||||
return;
|
||||
}
|
||||
|
||||
if (rc)
|
||||
warn("Failed %s operation on path %s", type, path);
|
||||
}
|
||||
|
||||
void tmpfilesd(void)
|
||||
{
|
||||
/* in priority order */
|
||||
char *dir[] = {
|
||||
TMPFILES_PATH "/*.conf", /* Finit specific, not in tmpfiles.d(5) */
|
||||
"/usr/lib/tmpfiles.d/*.conf",
|
||||
"/run/tmpfiles.d/*.conf",
|
||||
"/etc/tmpfiles.d/*.conf", /* local admin overrides */
|
||||
};
|
||||
int flags = GLOB_NOESCAPE;
|
||||
glob_t gl;
|
||||
size_t i;
|
||||
|
||||
for (i = 0; i < NELEMS(dir); i++) {
|
||||
glob(dir[i], flags, NULL, &gl);
|
||||
flags |= GLOB_APPEND;
|
||||
}
|
||||
|
||||
for (i = 0; i < gl.gl_pathc; i++) {
|
||||
char *fn = gl.gl_pathv[i];
|
||||
size_t j;
|
||||
FILE *fp;
|
||||
|
||||
/* check for overrides */
|
||||
for (j = i + 1; j < gl.gl_pathc; j++) {
|
||||
if (strcmp(basename(fn), basename(gl.gl_pathv[j])))
|
||||
continue;
|
||||
fn = NULL;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!fn)
|
||||
continue; /* skip, override exists */
|
||||
|
||||
fp = fopen(fn, "r");
|
||||
if (!fp)
|
||||
continue;
|
||||
|
||||
while (!feof(fp)) {
|
||||
char *line;
|
||||
|
||||
line = fparseln(fp, NULL, NULL, NULL, FPARSELN_UNESCCOMM);
|
||||
if (!line)
|
||||
continue;
|
||||
|
||||
tmpfiles(line);
|
||||
}
|
||||
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
globfree(&gl);
|
||||
}
|
||||
|
||||
/**
|
||||
* Local Variables:
|
||||
* indent-tabs-mode: t
|
||||
* c-file-style: "linux"
|
||||
* End:
|
||||
*/
|
||||
@@ -0,0 +1,42 @@
|
||||
/* Limited tmpfiles.d implementation
|
||||
*
|
||||
* Copyright (c) 2023 Joachim Wiberg <troglobit@gmail.com>
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifndef TMPFILES_H_
|
||||
#define TMPFILES_H_
|
||||
|
||||
#include <dirent.h>
|
||||
#include <ftw.h>
|
||||
#include <glob.h>
|
||||
#include <libgen.h>
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#ifdef _LIBITE_LITE
|
||||
# include <libite/lite.h>
|
||||
#else
|
||||
# include <lite/lite.h>
|
||||
#endif
|
||||
|
||||
void tmpfilesd(void);
|
||||
|
||||
#endif /* TMPFILES_H_ */
|
||||
Reference in new issue
Block a user