SymbX/systemd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tmpfiles: add a special return code for syntax failures

Browse Source 
In this way, individual errors in files can be treated differently than a
failure of the whole service.

A test is added to check that the expected value is returned.
Some parts are commented out, because it is not. This will be fixed in
a subsequent commit.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2017-12-01 18:58:54 +01:00
parent 1a2d4d7084
commit d9daae55d5
5 changed files with 120 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/tmpfiles/tmpfiles.c
+52 -14
View File
@@ -33,6 +33,7 @@
#include <string.h>
#include <sys/stat.h>
#include <sys/xattr.h>
#include <sysexits.h>
#include <time.h>
#include <unistd.h>
@@ -1841,7 +1842,7 @@ static int specifier_expansion_from_arg(Item *i) {
return 0;
}
static int parse_line(const char *fname, unsigned line, const char *buffer) {
static int parse_line(const char *fname, unsigned line, const char *buffer, bool *invalid_config) {
_cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
_cleanup_(item_free_contents) Item i = {};
@@ -1865,9 +1866,14 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
&group,
&age,
NULL);
if (r < 0)
if (r < 0) {
if (r == -EINVAL) /* invalid quoting and such */
*invalid_config = true;
return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
}
else if (r < 2) {
*invalid_config = true;
log_error("[%s:%u] Syntax error.", fname, line);
return -EIO;
}
@@ -1879,6 +1885,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
}
if (isempty(action)) {
*invalid_config = true;
log_error("[%s:%u] Command too short '%s'.", fname, line, action);
return -EINVAL;
}
@@ -1889,6 +1896,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
else if (action[pos] == '+' && !force)
force = true;
else {
*invalid_config = true;
log_error("[%s:%u] Unknown modifiers in command '%s'",
fname, line, action);
return -EINVAL;
@@ -1907,8 +1915,11 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
r = specifier_printf(path, specifier_table, NULL, &i.path);
if (r == -ENOKEY)
return log_unresolvable_specifier(fname, line);
if (r < 0)
if (r < 0) {
/* ENOMEM is the only return value left after ENOKEY,
* so *invalid_config should not be set. */
return log_error_errno(r, "[%s:%u] Failed to replace specifiers: %s", fname, line, path);
}
switch (i.type) {
@@ -1945,6 +1956,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case WRITE_FILE:
if (!i.argument) {
*invalid_config = true;
log_error("[%s:%u] Write file requires argument.", fname, line);
return -EBADMSG;
}
@@ -1956,6 +1968,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
if (!i.argument)
return log_oom();
} else if (!path_is_absolute(i.argument)) {
*invalid_config = true;
log_error("[%s:%u] Source path is not absolute.", fname, line);
return -EBADMSG;
}
@@ -1968,11 +1981,13 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
unsigned major, minor;
if (!i.argument) {
*invalid_config = true;
log_error("[%s:%u] Device file requires argument.", fname, line);
return -EBADMSG;
}
if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) {
*invalid_config = true;
log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
return -EBADMSG;
}
@@ -1984,6 +1999,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case SET_XATTR:
case RECURSIVE_SET_XATTR:
if (!i.argument) {
*invalid_config = true;
log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
return -EBADMSG;
}
@@ -1995,6 +2011,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case SET_ACL:
case RECURSIVE_SET_ACL:
if (!i.argument) {
*invalid_config = true;
log_error("[%s:%u] Set ACLs requires argument.", fname, line);
return -EBADMSG;
}
@@ -2006,21 +2023,26 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case SET_ATTRIBUTE:
case RECURSIVE_SET_ATTRIBUTE:
if (!i.argument) {
*invalid_config = true;
log_error("[%s:%u] Set file attribute requires argument.", fname, line);
return -EBADMSG;
}
r = parse_attribute_from_arg(&i);
if (r == -EINVAL)
*invalid_config = true;
if (r < 0)
return r;
break;
default:
log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
*invalid_config = true;
return -EBADMSG;
}
if (!path_is_absolute(i.path)) {
log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
*invalid_config = true;
return -EBADMSG;
}
@@ -2052,8 +2074,8 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
r = get_user_creds(&u, &i.uid, NULL, NULL, NULL);
if (r < 0) {
log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
return r;
*invalid_config = true;
return log_error_errno(r, "[%s:%u] Unknown user '%s'.", fname, line, user);
}
i.uid_set = true;
@@ -2064,6 +2086,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
r = get_group_creds(&g, &i.gid);
if (r < 0) {
*invalid_config = true;
log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
return r;
}
@@ -2081,6 +2104,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
}
if (parse_mode(mm, &m) < 0) {
*invalid_config = true;
log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
return -EBADMSG;
}
@@ -2099,6 +2123,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
}
if (parse_sec(a, &i.age) < 0) {
*invalid_config = true;
log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
return -EBADMSG;
}
@@ -2149,8 +2174,8 @@ static void help(void) {
" --boot Execute actions only safe at boot\n"
" --prefix=PATH Only apply rules with the specified prefix\n"
" --exclude-prefix=PATH Ignore rules with the specified prefix\n"
" --root=PATH Operate on an alternate filesystem root\n",
program_invocation_short_name);
" --root=PATH Operate on an alternate filesystem root\n"
, program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
@@ -2242,7 +2267,7 @@ static int parse_argv(int argc, char *argv[]) {
return 1;
}
static int read_config_file(const char *fn, bool ignore_enoent) {
static int read_config_file(const char *fn, bool ignore_enoent, bool *invalid_config) {
_cleanup_fclose_ FILE *_f = NULL;
FILE *f;
char line[LINE_MAX];
@@ -2274,6 +2299,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) {
FOREACH_LINE(line, f, break) {
char *l;
int k;
bool invalid_line = false;
v++;
@@ -2281,9 +2307,15 @@ static int read_config_file(const char *fn, bool ignore_enoent) {
if (IN_SET(*l, 0, '#'))
continue;
k = parse_line(fn, v, l);
if (k < 0 && r == 0)
r = k;
k = parse_line(fn, v, l, &invalid_line);
if (k < 0) {
if (invalid_line)
/* Allow reporting with a special code if the caller requested this */
*invalid_config = true;
else if (r == 0)
/* The first error becomes our return value */
r = k;
}
}
/* we have to determine age parameter for each entry of type X */
@@ -2327,6 +2359,7 @@ int main(int argc, char *argv[]) {
int r, k;
ItemArray *a;
Iterator iterator;
bool invalid_config = false;
r = parse_argv(argc, argv);
if (r <= 0)
@@ -2354,7 +2387,7 @@ int main(int argc, char *argv[]) {
int j;
for (j = optind; j < argc; j++) {
k = read_config_file(argv[j], false);
k = read_config_file(argv[j], false, &invalid_config);
if (k < 0 && r == 0)
r = k;
}
@@ -2370,7 +2403,7 @@ int main(int argc, char *argv[]) {
}
STRV_FOREACH(f, files) {
k = read_config_file(*f, true);
k = read_config_file(*f, true, &invalid_config);
if (k < 0 && r == 0)
r = k;
}
@@ -2404,5 +2437,10 @@ finish:
mac_selinux_finish();
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
if (r < 0)
return EXIT_FAILURE;
else if (invalid_config)
return EX_DATAERR;
else
return EXIT_SUCCESS;
}