src/test/test-tmpfiles.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2014 Zbigniew Jędrzejewski-Szmek
   4 ***/
   5
   6 #include <fcntl.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10
  11 #include "alloc-util.h"
  12 #include "fd-util.h"
  13 #include "fileio.h"
  14 #include "format-util.h"
  15 #include "fs-util.h"
  16 #include "log.h"
  17 #include "process-util.h"
  18 #include "string-util.h"
  19 #include "util.h"
  20
  21 int main(int argc, char** argv) {
  22         _cleanup_free_ char *cmd = NULL, *cmd2 = NULL, *ans = NULL, *ans2 = NULL, *d = NULL, *tmp = NULL, *line = NULL;
  23         _cleanup_close_ int fd = -1, fd2 = -1;
  24         const char *p = argv[1] ?: "/tmp";
  25         char *pattern;
  26
  27         log_set_max_level(LOG_DEBUG);
  28         log_parse_environment();
  29
  30         pattern = strjoina(p, "/systemd-test-XXXXXX");
  31
  32         fd = open_tmpfile_unlinkable(p, O_RDWR|O_CLOEXEC);
  33         assert_se(fd >= 0);
  34
  35         assert_se(asprintf(&cmd, "ls -l /proc/"PID_FMT"/fd/%d", getpid_cached(), fd) > 0);
  36         (void) system(cmd);
  37         assert_se(readlink_malloc(cmd + 6, &ans) >= 0);
  38         log_debug("link1: %s", ans);
  39         assert_se(endswith(ans, " (deleted)"));
  40
  41         fd2 = mkostemp_safe(pattern);
  42         assert_se(fd >= 0);
  43         assert_se(unlink(pattern) == 0);
  44
  45         assert_se(asprintf(&cmd2, "ls -l /proc/"PID_FMT"/fd/%d", getpid_cached(), fd2) > 0);
  46         (void) system(cmd2);
  47         assert_se(readlink_malloc(cmd2 + 6, &ans2) >= 0);
  48         log_debug("link2: %s", ans2);
  49         assert_se(endswith(ans2, " (deleted)"));
  50
  51         pattern = strjoina(p, "/tmpfiles-test");
  52         assert_se(tempfn_random(pattern, NULL, &d) >= 0);
  53
  54         fd = open_tmpfile_linkable(d, O_RDWR|O_CLOEXEC, &tmp);
  55         assert_se(fd >= 0);
  56         assert_se(write(fd, "foobar\n", 7) == 7);
  57
  58         assert_se(touch(d) >= 0);
  59         assert_se(link_tmpfile(fd, tmp, d) == -EEXIST);
  60         assert_se(unlink(d) >= 0);
  61         assert_se(link_tmpfile(fd, tmp, d) >= 0);
  62
  63         assert_se(read_one_line_file(d, &line) >= 0);
  64         assert_se(streq(line, "foobar"));
  65         assert_se(unlink(d) >= 0);
  66
  67         return 0;
  68 }