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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <errno.h> | |
4 | #include <stdbool.h> | |
5 | #include <stdio.h> | |
6 | #include <sys/prctl.h> | |
7 | #include <sys/stat.h> | |
8 | #include <sys/types.h> | |
9 | #include <unistd.h> | |
10 | ||
11 | #include "main-func.h" | |
12 | #include "proc-cmdline.h" | |
13 | #include "process-util.h" | |
14 | #include "signal-util.h" | |
15 | #include "string-util.h" | |
16 | #include "util.h" | |
17 | ||
18 | static bool arg_skip = false; | |
19 | static bool arg_force = false; | |
20 | ||
21 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { | |
22 | ||
23 | if (streq(key, "quotacheck.mode")) { | |
24 | ||
25 | if (proc_cmdline_value_missing(key, value)) | |
26 | return 0; | |
27 | ||
28 | if (streq(value, "auto")) | |
29 | arg_force = arg_skip = false; | |
30 | else if (streq(value, "force")) | |
31 | arg_force = true; | |
32 | else if (streq(value, "skip")) | |
33 | arg_skip = true; | |
34 | else | |
35 | log_warning("Invalid quotacheck.mode= parameter '%s'. Ignoring.", value); | |
36 | } | |
37 | ||
38 | #if HAVE_SYSV_COMPAT | |
39 | else if (streq(key, "forcequotacheck") && !value) { | |
40 | log_warning("Please use 'quotacheck.mode=force' rather than 'forcequotacheck' on the kernel command line."); | |
41 | arg_force = true; | |
42 | } | |
43 | #endif | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static void test_files(void) { | |
49 | ||
50 | #if HAVE_SYSV_COMPAT | |
51 | if (access("/forcequotacheck", F_OK) >= 0) { | |
52 | log_error("Please pass 'quotacheck.mode=force' on the kernel command line rather than creating /forcequotacheck on the root file system."); | |
53 | arg_force = true; | |
54 | } | |
55 | #endif | |
56 | } | |
57 | ||
58 | static int run(int argc, char *argv[]) { | |
59 | int r; | |
60 | ||
61 | log_setup(); | |
62 | ||
63 | if (argc > 1) | |
64 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
65 | "This program takes no arguments."); | |
66 | ||
67 | umask(0022); | |
68 | ||
69 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); | |
70 | if (r < 0) | |
71 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); | |
72 | ||
73 | test_files(); | |
74 | ||
75 | if (!arg_force) { | |
76 | if (arg_skip) | |
77 | return 0; | |
78 | ||
79 | if (access("/run/systemd/quotacheck", F_OK) < 0) | |
80 | return 0; | |
81 | } | |
82 | ||
83 | r = safe_fork("(quotacheck)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_RLIMIT_NOFILE_SAFE|FORK_WAIT|FORK_LOG, NULL); | |
84 | if (r < 0) | |
85 | return r; | |
86 | if (r == 0) { | |
87 | static const char * const cmdline[] = { | |
88 | QUOTACHECK, | |
89 | "-anug", | |
90 | NULL | |
91 | }; | |
92 | ||
93 | /* Child */ | |
94 | ||
95 | execv(cmdline[0], (char**) cmdline); | |
96 | _exit(EXIT_FAILURE); /* Operational error */ | |
97 | } | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | DEFINE_MAIN_FUNCTION(run); |