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-rw-r--r--src/core/load-fragment.c51
-rw-r--r--src/core/manager.c6
-rw-r--r--src/core/mount.c8
-rw-r--r--src/core/swap.c3
-rw-r--r--src/core/umount.c38
-rw-r--r--src/import/pull-common.c6
-rw-r--r--src/journal/journald-kmsg.c6
-rw-r--r--src/libsystemd/sd-login/sd-login.c6
-rw-r--r--src/login/logind-acl.c3
-rw-r--r--src/login/logind-inhibit.c12
-rw-r--r--src/shared/util.c55
-rw-r--r--src/shared/util.h13
-rw-r--r--src/test/test-util.c31
-rw-r--r--src/tmpfiles/tmpfiles.c8
14 files changed, 138 insertions, 108 deletions
diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 07384d3668..e61418db50 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -507,16 +507,17 @@ int config_parse_exec_oom_score_adjust(const char* unit,
return 0;
}
-int config_parse_exec(const char *unit,
- const char *filename,
- unsigned line,
- const char *section,
- unsigned section_line,
- const char *lvalue,
- int ltype,
- const char *rvalue,
- void *data,
- void *userdata) {
+int config_parse_exec(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
ExecCommand **e = data, *nce;
char *path, **n;
@@ -568,15 +569,13 @@ int config_parse_exec(const char *unit,
word ++;
}
}
- } else
- if (strneq(word, ";", MAX(l, 1U)))
+ } else if (strneq(word, ";", MAX(l, 1U)))
goto found;
k++;
}
if (!isempty(state)) {
- log_syntax(unit, LOG_ERR, filename, line, EINVAL,
- "Trailing garbage, ignoring.");
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Trailing garbage, ignoring.");
return 0;
}
@@ -605,9 +604,10 @@ int config_parse_exec(const char *unit,
else
skip = strneq(word, "\\;", MAX(l, 1U));
- c = cunescape_length(word + skip, l - skip);
- if (!c) {
- r = log_oom();
+ r = cunescape_length(word + skip, l - skip, 0, &c);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to unescape command line, ignoring: %s", rvalue);
+ r = 0;
goto fail;
}
@@ -637,8 +637,7 @@ int config_parse_exec(const char *unit,
else
goto ok;
- log_syntax(unit, LOG_ERR, filename, line, EINVAL,
- "%s, ignoring: %s", reason, rvalue);
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL, "%s, ignoring: %s", reason, rvalue);
r = 0;
goto fail;
@@ -1976,8 +1975,7 @@ int config_parse_environ(const char *unit,
if (u) {
r = unit_full_printf(u, rvalue, &k);
if (r < 0)
- log_syntax(unit, LOG_ERR, filename, line, -r,
- "Failed to resolve specifiers, ignoring: %s", rvalue);
+ log_syntax(unit, LOG_ERR, filename, line, -r, "Failed to resolve specifiers, ignoring: %s", rvalue);
}
if (!k)
@@ -1989,13 +1987,14 @@ int config_parse_environ(const char *unit,
_cleanup_free_ char *n;
char **x;
- n = cunescape_length(word, l);
- if (!n)
- return log_oom();
+ r = cunescape_length(word, l, 0, &n);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Couldn't unescape assignment, ignoring: %s", rvalue);
+ continue;
+ }
if (!env_assignment_is_valid(n)) {
- log_syntax(unit, LOG_ERR, filename, line, EINVAL,
- "Invalid environment assignment, ignoring: %s", rvalue);
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Invalid environment assignment, ignoring: %s", rvalue);
continue;
}
diff --git a/src/core/manager.c b/src/core/manager.c
index 73417ab1a8..1c912fcdf7 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -2426,11 +2426,9 @@ int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
_cleanup_free_ char *uce = NULL;
char **e;
- uce = cunescape(l+4);
- if (!uce) {
- r = -ENOMEM;
+ r = cunescape(l + 4, UNESCAPE_RELAX, &uce);
+ if (r < 0)
goto finish;
- }
e = strv_env_set(m->environment, uce);
if (!e) {
diff --git a/src/core/mount.c b/src/core/mount.c
index 53594cd40b..c4aa810d05 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -1579,7 +1579,7 @@ static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
r = 0;
for (;;) {
const char *device, *path, *options, *fstype;
- _cleanup_free_ const char *d = NULL, *p = NULL;
+ _cleanup_free_ char *d = NULL, *p = NULL;
struct libmnt_fs *fs;
int k;
@@ -1594,12 +1594,10 @@ static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
options = mnt_fs_get_options(fs);
fstype = mnt_fs_get_fstype(fs);
- d = cunescape(device);
- if (!d)
+ if (cunescape(device, UNESCAPE_RELAX, &d) < 0)
return log_oom();
- p = cunescape(path);
- if (!p)
+ if (cunescape(path, UNESCAPE_RELAX, &p) < 0)
return log_oom();
(void) device_found_node(m, d, true, DEVICE_FOUND_MOUNT, set_flags);
diff --git a/src/core/swap.c b/src/core/swap.c
index 6b1bdb5c1e..53f127484f 100644
--- a/src/core/swap.c
+++ b/src/core/swap.c
@@ -1099,8 +1099,7 @@ static int swap_load_proc_swaps(Manager *m, bool set_flags) {
continue;
}
- d = cunescape(dev);
- if (!d)
+ if (cunescape(dev, UNESCAPE_RELAX, &d) < 0)
return log_oom();
device_found_node(m, d, true, DEVICE_FOUND_SWAP, set_flags);
diff --git a/src/core/umount.c b/src/core/umount.c
index ceee70fbea..bee267a5ad 100644
--- a/src/core/umount.c
+++ b/src/core/umount.c
@@ -62,6 +62,7 @@ static void mount_points_list_free(MountPoint **head) {
static int mount_points_list_get(MountPoint **head) {
_cleanup_fclose_ FILE *proc_self_mountinfo = NULL;
unsigned int i;
+ int r;
assert(head);
@@ -97,9 +98,9 @@ static int mount_points_list_get(MountPoint **head) {
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
/* Ignore mount points we can't unmount because they
* are API or because we are keeping them open (like
@@ -133,10 +134,12 @@ static int mount_points_list_get(MountPoint **head) {
static int swap_list_get(MountPoint **head) {
_cleanup_fclose_ FILE *proc_swaps = NULL;
unsigned int i;
+ int r;
assert(head);
- if (!(proc_swaps = fopen("/proc/swaps", "re")))
+ proc_swaps = fopen("/proc/swaps", "re");
+ if (!proc_swaps)
return (errno == ENOENT) ? 0 : -errno;
(void) fscanf(proc_swaps, "%*s %*s %*s %*s %*s\n");
@@ -146,19 +149,19 @@ static int swap_list_get(MountPoint **head) {
char *dev = NULL, *d;
int k;
- if ((k = fscanf(proc_swaps,
- "%ms " /* device/file */
- "%*s " /* type of swap */
- "%*s " /* swap size */
- "%*s " /* used */
- "%*s\n", /* priority */
- &dev)) != 1) {
+ k = fscanf(proc_swaps,
+ "%ms " /* device/file */
+ "%*s " /* type of swap */
+ "%*s " /* swap size */
+ "%*s " /* used */
+ "%*s\n", /* priority */
+ &dev);
+ if (k != 1) {
if (k == EOF)
break;
log_warning("Failed to parse /proc/swaps:%u.", i);
-
free(dev);
continue;
}
@@ -168,14 +171,13 @@ static int swap_list_get(MountPoint **head) {
continue;
}
- d = cunescape(dev);
+ r = cunescape(dev, UNESCAPE_RELAX, &d);
free(dev);
+ if (r < 0)
+ return r;
- if (!d) {
- return -ENOMEM;
- }
-
- if (!(swap = new0(MountPoint, 1))) {
+ swap = new0(MountPoint, 1);
+ if (!swap) {
free(d);
return -ENOMEM;
}
diff --git a/src/import/pull-common.c b/src/import/pull-common.c
index efd67a2937..57323531e2 100644
--- a/src/import/pull-common.c
+++ b/src/import/pull-common.c
@@ -92,9 +92,9 @@ int pull_find_old_etags(const char *url, const char *image_root, int dt, const c
if (a >= b)
continue;
- u = cunescape_length(a, b - a);
- if (!u)
- return -ENOMEM;
+ r = cunescape_length(a, b - a, 0, &u);
+ if (r < 0)
+ return r;
if (!http_etag_is_valid(u)) {
free(u);
diff --git a/src/journal/journald-kmsg.c b/src/journal/journald-kmsg.c
index c4216c4043..80bd9cd193 100644
--- a/src/journal/journald-kmsg.c
+++ b/src/journal/journald-kmsg.c
@@ -201,8 +201,7 @@ static void dev_kmsg_record(Server *s, const char *p, size_t l) {
*e = 0;
- m = cunescape_length_with_prefix(k, e - k, "_KERNEL_");
- if (!m)
+ if (cunescape_length_with_prefix(k, e - k, "_KERNEL_", UNESCAPE_RELAX, &m) < 0)
break;
if (startswith(m, "_KERNEL_DEVICE="))
@@ -299,8 +298,7 @@ static void dev_kmsg_record(Server *s, const char *p, size_t l) {
}
}
- message = cunescape_length_with_prefix(p, pl, "MESSAGE=");
- if (message)
+ if (cunescape_length_with_prefix(p, pl, "MESSAGE=", UNESCAPE_RELAX, &message) >= 0)
IOVEC_SET_STRING(iovec[n++], message);
server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, NULL, priority, 0);
diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c
index cc0677bdf2..072191e43f 100644
--- a/src/libsystemd/sd-login/sd-login.c
+++ b/src/libsystemd/sd-login/sd-login.c
@@ -496,9 +496,9 @@ _public_ int sd_session_get_desktop(const char *session, char **desktop) {
if (r < 0)
return r;
- t = cunescape(escaped);
- if (!t)
- return -ENOMEM;
+ r = cunescape(escaped, 0, &t);
+ if (r < 0)
+ return r;
*desktop = t;
return 0;
diff --git a/src/login/logind-acl.c b/src/login/logind-acl.c
index 941fd724a5..d2b3337788 100644
--- a/src/login/logind-acl.c
+++ b/src/login/logind-acl.c
@@ -253,8 +253,7 @@ int devnode_acl_all(struct udev *udev,
FOREACH_DIRENT(dent, dir, return -errno) {
_cleanup_free_ char *unescaped_devname = NULL;
- unescaped_devname = cunescape(dent->d_name);
- if (!unescaped_devname)
+ if (cunescape(dent->d_name, UNESCAPE_RELAX, &unescaped_devname) < 0)
return -ENOMEM;
n = strappend("/dev/", unescaped_devname);
diff --git a/src/login/logind-inhibit.c b/src/login/logind-inhibit.c
index 5d81693e6c..5eb1a2ea65 100644
--- a/src/login/logind-inhibit.c
+++ b/src/login/logind-inhibit.c
@@ -231,18 +231,18 @@ int inhibitor_load(Inhibitor *i) {
}
if (who) {
- cc = cunescape(who);
- if (!cc)
- return -ENOMEM;
+ r = cunescape(who, 0, &cc);
+ if (r < 0)
+ return r;
free(i->who);
i->who = cc;
}
if (why) {
- cc = cunescape(why);
- if (!cc)
- return -ENOMEM;
+ r = cunescape(why, 0, &cc);
+ if (r < 0)
+ return r;
free(i->why);
i->why = cc;
diff --git a/src/shared/util.c b/src/shared/util.c
index 8b011ccfa1..67f66ace21 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -1466,12 +1466,13 @@ static int cunescape_one(const char *p, size_t length, char *ret) {
return r;
}
-char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) {
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret) {
char *r, *t;
const char *f;
size_t pl;
assert(s);
+ assert(ret);
/* Undoes C style string escaping, and optionally prefixes it. */
@@ -1479,7 +1480,7 @@ char *cunescape_length_with_prefix(const char *s, size_t length, const char *pre
r = new(char, pl+length+1);
if (!r)
- return NULL;
+ return -ENOMEM;
if (prefix)
memcpy(r, prefix, pl);
@@ -1491,17 +1492,31 @@ char *cunescape_length_with_prefix(const char *s, size_t length, const char *pre
remaining = s + length - f;
assert(remaining > 0);
- if (*f != '\\' || remaining == 1) {
- /* a literal literal, or a trailing backslash, copy verbatim */
+ if (*f != '\\') {
+ /* A literal literal, copy verbatim */
*(t++) = *f;
continue;
}
+ if (remaining == 1) {
+ if (flags & UNESCAPE_RELAX) {
+ /* A trailing backslash, copy verbatim */
+ *(t++) = *f;
+ continue;
+ }
+
+ return -EINVAL;
+ }
+
k = cunescape_one(f + 1, remaining - 1, t);
if (k < 0) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- continue;
+ if (flags & UNESCAPE_RELAX) {
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '\\';
+ continue;
+ }
+
+ return k;
}
f += k;
@@ -1509,17 +1524,17 @@ char *cunescape_length_with_prefix(const char *s, size_t length, const char *pre
}
*t = 0;
- return r;
-}
-char *cunescape_length(const char *s, size_t length) {
- return cunescape_length_with_prefix(s, length, NULL);
+ *ret = r;
+ return t - r;
}
-char *cunescape(const char *s) {
- assert(s);
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) {
+ return cunescape_length_with_prefix(s, length, NULL, flags, ret);
+}
- return cunescape_length(s, strlen(s));
+int cunescape(const char *s, UnescapeFlags flags, char **ret) {
+ return cunescape_length(s, strlen(s), flags, ret);
}
char *xescape(const char *s, const char *bad) {
@@ -6731,9 +6746,9 @@ int umount_recursive(const char *prefix, int flags) {
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
if (!path_startswith(p, prefix))
continue;
@@ -6833,9 +6848,9 @@ int bind_remount_recursive(const char *prefix, bool ro) {
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
/* Let's ignore autofs mounts. If they aren't
* triggered yet, we want to avoid triggering
diff --git a/src/shared/util.h b/src/shared/util.h
index 882355665c..e7a5d6366e 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -311,9 +311,14 @@ char decchar(int x) _const_;
int undecchar(char c) _const_;
char *cescape(const char *s);
-char *cunescape(const char *s);
-char *cunescape_length(const char *s, size_t length);
-char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
+
+typedef enum UnescapeFlags {
+ UNESCAPE_RELAX = 1,
+} UnescapeFlags;
+
+int cunescape(const char *s, UnescapeFlags flags, char **ret);
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
char *xescape(const char *s, const char *bad);
@@ -1014,7 +1019,7 @@ int take_password_lock(const char *root);
int is_symlink(const char *path);
int is_dir(const char *path, bool follow);
-typedef enum UnquoteFlags{
+typedef enum UnquoteFlags {
UNQUOTE_RELAX = 1,
UNQUOTE_CUNESCAPE = 2,
} UnquoteFlags;
diff --git a/src/test/test-util.c b/src/test/test-util.c
index e9d1522a65..aaf25f88bb 100644
--- a/src/test/test-util.c
+++ b/src/test/test-util.c
@@ -417,23 +417,40 @@ static void test_cescape(void) {
static void test_cunescape(void) {
_cleanup_free_ char *unescaped;
- unescaped = cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00");
- assert_se(streq_ptr(unescaped, "abc\\\"\b\f\a\n\r\t\v\003\177\234\313\\000\\x00"));
+ assert_se(cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00", 0, &unescaped) < 0);
+ assert_se(cunescape("abc\\\\\\\"\\b\\f\\a\\n\\r\\t\\v\\003\\177\\234\\313\\000\\x00", UNESCAPE_RELAX, &unescaped) >= 0);
+ const char *x = "abc\\\"\b\f\a\n\r\t\v\003\177\234\313\\000\\x00";
+ assert_se(streq_ptr(unescaped, x));
+ free(unescaped);
+ unescaped = NULL;
/* incomplete sequences */
- unescaped = cunescape("\\x0");
+ assert_se(cunescape("\\x0", 0, &unescaped) < 0);
+ assert_se(cunescape("\\x0", UNESCAPE_RELAX, &unescaped) >= 0);
assert_se(streq_ptr(unescaped, "\\x0"));
+ free(unescaped);
+ unescaped = NULL;
- unescaped = cunescape("\\x");
+ assert_se(cunescape("\\x", 0, &unescaped) < 0);
+ assert_se(cunescape("\\x", UNESCAPE_RELAX, &unescaped) >= 0);
assert_se(streq_ptr(unescaped, "\\x"));
+ free(unescaped);
+ unescaped = NULL;
- unescaped = cunescape("\\");
+ assert_se(cunescape("\\", 0, &unescaped) < 0);
+ assert_se(cunescape("\\", UNESCAPE_RELAX, &unescaped) >= 0);
assert_se(streq_ptr(unescaped, "\\"));
+ free(unescaped);
+ unescaped = NULL;
- unescaped = cunescape("\\11");
+ assert_se(cunescape("\\11", 0, &unescaped) < 0);
+ assert_se(cunescape("\\11", UNESCAPE_RELAX, &unescaped) >= 0);
assert_se(streq_ptr(unescaped, "\\11"));
+ free(unescaped);
+ unescaped = NULL;
- unescaped = cunescape("\\1");
+ assert_se(cunescape("\\1", 0, &unescaped) < 0);
+ assert_se(cunescape("\\1", UNESCAPE_RELAX, &unescaped) >= 0);
assert_se(streq_ptr(unescaped, "\\1"));
}
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 20972f6310..8c89fb33b8 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -913,13 +913,13 @@ static int write_one_file(Item *i, const char *path) {
}
if (i->argument) {
- _cleanup_free_ char *unescaped;
+ _cleanup_free_ char *unescaped = NULL;
log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path);
- unescaped = cunescape(i->argument);
- if (!unescaped)
- return log_oom();
+ r = cunescape(i->argument, 0, &unescaped);
+ if (r < 0)
+ return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
r = loop_write(fd, unescaped, strlen(unescaped), false);
if (r < 0)
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-02 10:46:58 +0000