src/test/test-tmpfiles.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2014 Zbigniew Jędrzejewski-Szmek
   6 ***/
   7
   8 #include <fcntl.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12
  13 #include "alloc-util.h"
  14 #include "fd-util.h"
  15 #include "fileio.h"
  16 #include "format-util.h"
  17 #include "fs-util.h"
  18 #include "log.h"
  19 #include "process-util.h"
  20 #include "string-util.h"
  21 #include "util.h"
  22
  23 int main(int argc, char** argv) {
  24         _cleanup_free_ char *cmd = NULL, *cmd2 = NULL, *ans = NULL, *ans2 = NULL, *d = NULL, *tmp = NULL, *line = NULL;
  25         _cleanup_close_ int fd = -1, fd2 = -1;
  26         const char *p = argv[1] ?: "/tmp";
  27         char *pattern;
  28
  29         log_set_max_level(LOG_DEBUG);
  30         log_parse_environment();
  31
  32         pattern = strjoina(p, "/systemd-test-XXXXXX");
  33
  34         fd = open_tmpfile_unlinkable(p, O_RDWR|O_CLOEXEC);
  35         assert_se(fd >= 0);
  36
  37         assert_se(asprintf(&cmd, "ls -l /proc/"PID_FMT"/fd/%d", getpid_cached(), fd) > 0);
  38         (void) system(cmd);
  39         assert_se(readlink_malloc(cmd + 6, &ans) >= 0);
  40         log_debug("link1: %s", ans);
  41         assert_se(endswith(ans, " (deleted)"));
  42
  43         fd2 = mkostemp_safe(pattern);
  44         assert_se(fd >= 0);
  45         assert_se(unlink(pattern) == 0);
  46
  47         assert_se(asprintf(&cmd2, "ls -l /proc/"PID_FMT"/fd/%d", getpid_cached(), fd2) > 0);
  48         (void) system(cmd2);
  49         assert_se(readlink_malloc(cmd2 + 6, &ans2) >= 0);
  50         log_debug("link2: %s", ans2);
  51         assert_se(endswith(ans2, " (deleted)"));
  52
  53         pattern = strjoina(p, "/tmpfiles-test");
  54         assert_se(tempfn_random(pattern, NULL, &d) >= 0);
  55
  56         fd = open_tmpfile_linkable(d, O_RDWR|O_CLOEXEC, &tmp);
  57         assert_se(fd >= 0);
  58         assert_se(write(fd, "foobar\n", 7) == 7);
  59
  60         assert_se(touch(d) >= 0);
  61         assert_se(link_tmpfile(fd, tmp, d) == -EEXIST);
  62         assert_se(unlink(d) >= 0);
  63         assert_se(link_tmpfile(fd, tmp, d) >= 0);
  64
  65         assert_se(read_one_line_file(d, &line) >= 0);
  66         assert_se(streq(line, "foobar"));
  67         assert_se(unlink(d) >= 0);
  68
  69         return 0;
  70 }