diff options
Diffstat (limited to 'shared/systemd/src/basic/path-util.c')
| -rw-r--r-- | shared/systemd/src/basic/path-util.c | 1160 |
1 files changed, 1160 insertions, 0 deletions
diff --git a/shared/systemd/src/basic/path-util.c b/shared/systemd/src/basic/path-util.c new file mode 100644 index 00000000..6c5e725d --- /dev/null +++ b/shared/systemd/src/basic/path-util.c @@ -0,0 +1,1160 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include "nm-sd-adapt-shared.h" + +#include <errno.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <unistd.h> + +/* When we include libgen.h because we need dirname() we immediately + * undefine basename() since libgen.h defines it as a macro to the + * POSIX version which is really broken. We prefer GNU basename(). */ +#include <libgen.h> +#undef basename + +#include "alloc-util.h" +#include "extract-word.h" +#include "fs-util.h" +#include "glob-util.h" +#include "log.h" +#include "macro.h" +#include "missing.h" +#include "parse-util.h" +#include "path-util.h" +#include "stat-util.h" +#include "string-util.h" +#include "strv.h" +#include "time-util.h" +#include "utf8.h" + +bool path_is_absolute(const char *p) { + return p[0] == '/'; +} + +#if 0 /* NM_IGNORED */ +bool is_path(const char *p) { + return !!strchr(p, '/'); +} + +int path_split_and_make_absolute(const char *p, char ***ret) { + char **l; + int r; + + assert(p); + assert(ret); + + l = strv_split(p, ":"); + if (!l) + return -ENOMEM; + + r = path_strv_make_absolute_cwd(l); + if (r < 0) { + strv_free(l); + return r; + } + + *ret = l; + return r; +} + +char *path_make_absolute(const char *p, const char *prefix) { + assert(p); + + /* Makes every item in the list an absolute path by prepending + * the prefix, if specified and necessary */ + + if (path_is_absolute(p) || isempty(prefix)) + return strdup(p); + + if (endswith(prefix, "/")) + return strjoin(prefix, p); + else + return strjoin(prefix, "/", p); +} + +int safe_getcwd(char **ret) { + char *cwd; + + cwd = get_current_dir_name(); + if (!cwd) + return negative_errno(); + + /* Let's make sure the directory is really absolute, to protect us from the logic behind + * CVE-2018-1000001 */ + if (cwd[0] != '/') { + free(cwd); + return -ENOMEDIUM; + } + + *ret = cwd; + return 0; +} + +int path_make_absolute_cwd(const char *p, char **ret) { + char *c; + int r; + + assert(p); + assert(ret); + + /* Similar to path_make_absolute(), but prefixes with the + * current working directory. */ + + if (path_is_absolute(p)) + c = strdup(p); + else { + _cleanup_free_ char *cwd = NULL; + + r = safe_getcwd(&cwd); + if (r < 0) + return r; + + c = path_join(cwd, p); + } + if (!c) + return -ENOMEM; + + *ret = c; + return 0; +} + +int path_make_relative(const char *from_dir, const char *to_path, char **_r) { + char *f, *t, *r, *p; + unsigned n_parents = 0; + + assert(from_dir); + assert(to_path); + assert(_r); + + /* Strips the common part, and adds ".." elements as necessary. */ + + if (!path_is_absolute(from_dir) || !path_is_absolute(to_path)) + return -EINVAL; + + f = strdupa(from_dir); + t = strdupa(to_path); + + path_simplify(f, true); + path_simplify(t, true); + + /* Skip the common part. */ + for (;;) { + size_t a, b; + + f += *f == '/'; + t += *t == '/'; + + if (!*f) { + if (!*t) + /* from_dir equals to_path. */ + r = strdup("."); + else + /* from_dir is a parent directory of to_path. */ + r = strdup(t); + if (!r) + return -ENOMEM; + + *_r = r; + return 0; + } + + if (!*t) + break; + + a = strcspn(f, "/"); + b = strcspn(t, "/"); + + if (a != b || memcmp(f, t, a) != 0) + break; + + f += a; + t += b; + } + + /* If we're here, then "from_dir" has one or more elements that need to + * be replaced with "..". */ + + /* Count the number of necessary ".." elements. */ + for (; *f;) { + size_t w; + + w = strcspn(f, "/"); + + /* If this includes ".." we can't do a simple series of "..", refuse */ + if (w == 2 && f[0] == '.' && f[1] == '.') + return -EINVAL; + + /* Count number of elements */ + n_parents++; + + f += w; + f += *f == '/'; + } + + r = new(char, n_parents * 3 + strlen(t) + 1); + if (!r) + return -ENOMEM; + + for (p = r; n_parents > 0; n_parents--) + p = mempcpy(p, "../", 3); + + if (*t) + strcpy(p, t); + else + /* Remove trailing slash */ + *(--p) = 0; + + *_r = r; + return 0; +} + +int path_strv_make_absolute_cwd(char **l) { + char **s; + int r; + + /* Goes through every item in the string list and makes it + * absolute. This works in place and won't rollback any + * changes on failure. */ + + STRV_FOREACH(s, l) { + char *t; + + r = path_make_absolute_cwd(*s, &t); + if (r < 0) + return r; + + path_simplify(t, false); + free_and_replace(*s, t); + } + + return 0; +} + +char **path_strv_resolve(char **l, const char *root) { + char **s; + unsigned k = 0; + bool enomem = false; + int r; + + if (strv_isempty(l)) + return l; + + /* Goes through every item in the string list and canonicalize + * the path. This works in place and won't rollback any + * changes on failure. */ + + STRV_FOREACH(s, l) { + _cleanup_free_ char *orig = NULL; + char *t, *u; + + if (!path_is_absolute(*s)) { + free(*s); + continue; + } + + if (root) { + orig = *s; + t = prefix_root(root, orig); + if (!t) { + enomem = true; + continue; + } + } else + t = *s; + + r = chase_symlinks(t, root, 0, &u); + if (r == -ENOENT) { + if (root) { + u = TAKE_PTR(orig); + free(t); + } else + u = t; + } else if (r < 0) { + free(t); + + if (r == -ENOMEM) + enomem = true; + + continue; + } else if (root) { + char *x; + + free(t); + x = path_startswith(u, root); + if (x) { + /* restore the slash if it was lost */ + if (!startswith(x, "/")) + *(--x) = '/'; + + t = strdup(x); + free(u); + if (!t) { + enomem = true; + continue; + } + u = t; + } else { + /* canonicalized path goes outside of + * prefix, keep the original path instead */ + free_and_replace(u, orig); + } + } else + free(t); + + l[k++] = u; + } + + l[k] = NULL; + + if (enomem) + return NULL; + + return l; +} + +char **path_strv_resolve_uniq(char **l, const char *root) { + + if (strv_isempty(l)) + return l; + + if (!path_strv_resolve(l, root)) + return NULL; + + return strv_uniq(l); +} +#endif /* NM_IGNORED */ + +char *path_simplify(char *path, bool kill_dots) { + char *f, *t; + bool slash = false, ignore_slash = false, absolute; + + assert(path); + + /* Removes redundant inner and trailing slashes. Also removes unnecessary dots + * if kill_dots is true. Modifies the passed string in-place. + * + * ///foo//./bar/. becomes /foo/./bar/. (if kill_dots is false) + * ///foo//./bar/. becomes /foo/bar (if kill_dots is true) + * .//./foo//./bar/. becomes ././foo/./bar/. (if kill_dots is false) + * .//./foo//./bar/. becomes foo/bar (if kill_dots is true) + */ + + if (isempty(path)) + return path; + + absolute = path_is_absolute(path); + + f = path; + if (kill_dots && *f == '.' && IN_SET(f[1], 0, '/')) { + ignore_slash = true; + f++; + } + + for (t = path; *f; f++) { + + if (*f == '/') { + slash = true; + continue; + } + + if (slash) { + if (kill_dots && *f == '.' && IN_SET(f[1], 0, '/')) + continue; + + slash = false; + if (ignore_slash) + ignore_slash = false; + else + *(t++) = '/'; + } + + *(t++) = *f; + } + + /* Special rule, if we stripped everything, we either need a "/" (for the root directory) + * or "." for the current directory */ + if (t == path) { + if (absolute) + *(t++) = '/'; + else + *(t++) = '.'; + } + + *t = 0; + return path; +} + +char* path_startswith(const char *path, const char *prefix) { + assert(path); + assert(prefix); + + /* Returns a pointer to the start of the first component after the parts matched by + * the prefix, iff + * - both paths are absolute or both paths are relative, + * and + * - each component in prefix in turn matches a component in path at the same position. + * An empty string will be returned when the prefix and path are equivalent. + * + * Returns NULL otherwise. + */ + + if ((path[0] == '/') != (prefix[0] == '/')) + return NULL; + + for (;;) { + size_t a, b; + + path += strspn(path, "/"); + prefix += strspn(prefix, "/"); + + if (*prefix == 0) + return (char*) path; + + if (*path == 0) + return NULL; + + a = strcspn(path, "/"); + b = strcspn(prefix, "/"); + + if (a != b) + return NULL; + + if (memcmp(path, prefix, a) != 0) + return NULL; + + path += a; + prefix += b; + } +} + +int path_compare(const char *a, const char *b) { + int d; + + assert(a); + assert(b); + + /* A relative path and an absolute path must not compare as equal. + * Which one is sorted before the other does not really matter. + * Here a relative path is ordered before an absolute path. */ + d = (a[0] == '/') - (b[0] == '/'); + if (d != 0) + return d; + + for (;;) { + size_t j, k; + + a += strspn(a, "/"); + b += strspn(b, "/"); + + if (*a == 0 && *b == 0) + return 0; + + /* Order prefixes first: "/foo" before "/foo/bar" */ + if (*a == 0) + return -1; + if (*b == 0) + return 1; + + j = strcspn(a, "/"); + k = strcspn(b, "/"); + + /* Alphabetical sort: "/foo/aaa" before "/foo/b" */ + d = memcmp(a, b, MIN(j, k)); + if (d != 0) + return (d > 0) - (d < 0); /* sign of d */ + + /* Sort "/foo/a" before "/foo/aaa" */ + d = (j > k) - (j < k); /* sign of (j - k) */ + if (d != 0) + return d; + + a += j; + b += k; + } +} + +bool path_equal(const char *a, const char *b) { + return path_compare(a, b) == 0; +} + +#if 0 /* NM_IGNORED */ +bool path_equal_or_files_same(const char *a, const char *b, int flags) { + return path_equal(a, b) || files_same(a, b, flags) > 0; +} + +char* path_join_internal(const char *first, ...) { + char *joined, *q; + const char *p; + va_list ap; + bool slash; + size_t sz; + + /* Joins all listed strings until the sentinel and places a "/" between them unless the strings end/begin + * already with one so that it is unnecessary. Note that slashes which are already duplicate won't be + * removed. The string returned is hence always equal to or longer than the sum of the lengths of each + * individual string. + * + * Note: any listed empty string is simply skipped. This can be useful for concatenating strings of which some + * are optional. + * + * Examples: + * + * path_join("foo", "bar") → "foo/bar" + * path_join("foo/", "bar") → "foo/bar" + * path_join("", "foo", "", "bar", "") → "foo/bar" */ + + sz = strlen_ptr(first); + va_start(ap, first); + while ((p = va_arg(ap, char*)) != (const char*) -1) + if (!isempty(p)) + sz += 1 + strlen(p); + va_end(ap); + + joined = new(char, sz + 1); + if (!joined) + return NULL; + + if (!isempty(first)) { + q = stpcpy(joined, first); + slash = endswith(first, "/"); + } else { + /* Skip empty items */ + joined[0] = 0; + q = joined; + slash = true; /* no need to generate a slash anymore */ + } + + va_start(ap, first); + while ((p = va_arg(ap, char*)) != (const char*) -1) { + if (isempty(p)) + continue; + + if (!slash && p[0] != '/') + *(q++) = '/'; + + q = stpcpy(q, p); + slash = endswith(p, "/"); + } + va_end(ap); + + return joined; +} + +int find_binary(const char *name, char **ret) { + int last_error, r; + const char *p; + + assert(name); + + if (is_path(name)) { + if (access(name, X_OK) < 0) + return -errno; + + if (ret) { + r = path_make_absolute_cwd(name, ret); + if (r < 0) + return r; + } + + return 0; + } + + /** + * Plain getenv, not secure_getenv, because we want + * to actually allow the user to pick the binary. + */ + p = getenv("PATH"); + if (!p) + p = DEFAULT_PATH; + + last_error = -ENOENT; + + for (;;) { + _cleanup_free_ char *j = NULL, *element = NULL; + + r = extract_first_word(&p, &element, ":", EXTRACT_RELAX|EXTRACT_DONT_COALESCE_SEPARATORS); + if (r < 0) + return r; + if (r == 0) + break; + + if (!path_is_absolute(element)) + continue; + + j = strjoin(element, "/", name); + if (!j) + return -ENOMEM; + + if (access(j, X_OK) >= 0) { + /* Found it! */ + + if (ret) { + *ret = path_simplify(j, false); + j = NULL; + } + + return 0; + } + + last_error = -errno; + } + + return last_error; +} + +bool paths_check_timestamp(const char* const* paths, usec_t *timestamp, bool update) { + bool changed = false; + const char* const* i; + + assert(timestamp); + + if (!paths) + return false; + + STRV_FOREACH(i, paths) { + struct stat stats; + usec_t u; + + if (stat(*i, &stats) < 0) + continue; + + u = timespec_load(&stats.st_mtim); + + /* first check */ + if (*timestamp >= u) + continue; + + log_debug("timestamp of '%s' changed", *i); + + /* update timestamp */ + if (update) { + *timestamp = u; + changed = true; + } else + return true; + } + + return changed; +} + +static int binary_is_good(const char *binary) { + _cleanup_free_ char *p = NULL, *d = NULL; + int r; + + r = find_binary(binary, &p); + if (r == -ENOENT) + return 0; + if (r < 0) + return r; + + /* An fsck that is linked to /bin/true is a non-existent + * fsck */ + + r = readlink_malloc(p, &d); + if (r == -EINVAL) /* not a symlink */ + return 1; + if (r < 0) + return r; + + return !PATH_IN_SET(d, "true" + "/bin/true", + "/usr/bin/true", + "/dev/null"); +} + +int fsck_exists(const char *fstype) { + const char *checker; + + assert(fstype); + + if (streq(fstype, "auto")) + return -EINVAL; + + checker = strjoina("fsck.", fstype); + return binary_is_good(checker); +} + +int mkfs_exists(const char *fstype) { + const char *mkfs; + + assert(fstype); + + if (streq(fstype, "auto")) + return -EINVAL; + + mkfs = strjoina("mkfs.", fstype); + return binary_is_good(mkfs); +} + +char *prefix_root(const char *root, const char *path) { + char *n, *p; + size_t l; + + /* If root is passed, prefixes path with it. Otherwise returns + * it as is. */ + + assert(path); + + /* First, drop duplicate prefixing slashes from the path */ + while (path[0] == '/' && path[1] == '/') + path++; + + if (empty_or_root(root)) + return strdup(path); + + l = strlen(root) + 1 + strlen(path) + 1; + + n = new(char, l); + if (!n) + return NULL; + + p = stpcpy(n, root); + + while (p > n && p[-1] == '/') + p--; + + if (path[0] != '/') + *(p++) = '/'; + + strcpy(p, path); + return n; +} + +int parse_path_argument_and_warn(const char *path, bool suppress_root, char **arg) { + char *p; + int r; + + /* + * This function is intended to be used in command line + * parsers, to handle paths that are passed in. It makes the + * path absolute, and reduces it to NULL if omitted or + * root (the latter optionally). + * + * NOTE THAT THIS WILL FREE THE PREVIOUS ARGUMENT POINTER ON + * SUCCESS! Hence, do not pass in uninitialized pointers. + */ + + if (isempty(path)) { + *arg = mfree(*arg); + return 0; + } + + r = path_make_absolute_cwd(path, &p); + if (r < 0) + return log_error_errno(r, "Failed to parse path \"%s\" and make it absolute: %m", path); + + path_simplify(p, false); + if (suppress_root && empty_or_root(p)) + p = mfree(p); + + free_and_replace(*arg, p); + + return 0; +} + +char* dirname_malloc(const char *path) { + char *d, *dir, *dir2; + + assert(path); + + d = strdup(path); + if (!d) + return NULL; + + dir = dirname(d); + assert(dir); + + if (dir == d) + return d; + + dir2 = strdup(dir); + free(d); + + return dir2; +} + +const char *last_path_component(const char *path) { + + /* Finds the last component of the path, preserving the optional trailing slash that signifies a directory. + * + * a/b/c → c + * a/b/c/ → c/ + * x → x + * x/ → x/ + * /y → y + * /y/ → y/ + * / → / + * // → / + * /foo/a → a + * /foo/a/ → a/ + * + * Also, the empty string is mapped to itself. + * + * This is different than basename(), which returns "" when a trailing slash is present. + */ + + unsigned l, k; + + if (!path) + return NULL; + + l = k = strlen(path); + if (l == 0) /* special case — an empty string */ + return path; + + while (k > 0 && path[k-1] == '/') + k--; + + if (k == 0) /* the root directory */ + return path + l - 1; + + while (k > 0 && path[k-1] != '/') + k--; + + return path + k; +} + +int path_extract_filename(const char *p, char **ret) { + _cleanup_free_ char *a = NULL; + const char *c, *e = NULL, *q; + + /* Extracts the filename part (i.e. right-most component) from a path, i.e. string that passes + * filename_is_valid(). A wrapper around last_path_component(), but eats up trailing slashes. */ + + if (!p) + return -EINVAL; + + c = last_path_component(p); + + for (q = c; *q != 0; q++) + if (*q != '/') + e = q + 1; + + if (!e) /* no valid character? */ + return -EINVAL; + + a = strndup(c, e - c); + if (!a) + return -ENOMEM; + + if (!filename_is_valid(a)) + return -EINVAL; + + *ret = TAKE_PTR(a); + + return 0; +} +#endif /* NM_IGNORED */ + +bool filename_is_valid(const char *p) { + const char *e; + + if (isempty(p)) + return false; + + if (dot_or_dot_dot(p)) + return false; + + e = strchrnul(p, '/'); + if (*e != 0) + return false; + + if (e - p > FILENAME_MAX) /* FILENAME_MAX is counted *without* the trailing NUL byte */ + return false; + + return true; +} + +bool path_is_valid(const char *p) { + + if (isempty(p)) + return false; + + if (strlen(p) >= PATH_MAX) /* PATH_MAX is counted *with* the trailing NUL byte */ + return false; + + return true; +} + +bool path_is_normalized(const char *p) { + + if (!path_is_valid(p)) + return false; + + if (dot_or_dot_dot(p)) + return false; + + if (startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) + return false; + + if (startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) + return false; + + if (strstr(p, "//")) + return false; + + return true; +} + +#if 0 /* NM_IGNORED */ +char *file_in_same_dir(const char *path, const char *filename) { + char *e, *ret; + size_t k; + + assert(path); + assert(filename); + + /* This removes the last component of path and appends + * filename, unless the latter is absolute anyway or the + * former isn't */ + + if (path_is_absolute(filename)) + return strdup(filename); + + e = strrchr(path, '/'); + if (!e) + return strdup(filename); + + k = strlen(filename); + ret = new(char, (e + 1 - path) + k + 1); + if (!ret) + return NULL; + + memcpy(mempcpy(ret, path, e + 1 - path), filename, k + 1); + return ret; +} + +bool hidden_or_backup_file(const char *filename) { + const char *p; + + assert(filename); + + if (filename[0] == '.' || + streq(filename, "lost+found") || + streq(filename, "aquota.user") || + streq(filename, "aquota.group") || + endswith(filename, "~")) + return true; + + p = strrchr(filename, '.'); + if (!p) + return false; + + /* Please, let's not add more entries to the list below. If external projects think it's a good idea to come up + * with always new suffixes and that everybody else should just adjust to that, then it really should be on + * them. Hence, in future, let's not add any more entries. Instead, let's ask those packages to instead adopt + * one of the generic suffixes/prefixes for hidden files or backups, possibly augmented with an additional + * string. Specifically: there's now: + * + * The generic suffixes "~" and ".bak" for backup files + * The generic prefix "." for hidden files + * + * Thus, if a new package manager "foopkg" wants its own set of ".foopkg-new", ".foopkg-old", ".foopkg-dist" + * or so registered, let's refuse that and ask them to use ".foopkg.new", ".foopkg.old" or ".foopkg~" instead. + */ + + return STR_IN_SET(p + 1, + "rpmnew", + "rpmsave", + "rpmorig", + "dpkg-old", + "dpkg-new", + "dpkg-tmp", + "dpkg-dist", + "dpkg-bak", + "dpkg-backup", + "dpkg-remove", + "ucf-new", + "ucf-old", + "ucf-dist", + "swp", + "bak", + "old", + "new"); +} + +bool is_device_path(const char *path) { + + /* Returns true on paths that likely refer to a device, either by path in sysfs or to something in /dev */ + + return PATH_STARTSWITH_SET(path, "/dev/", "/sys/"); +} + +bool valid_device_node_path(const char *path) { + + /* Some superficial checks whether the specified path is a valid device node path, all without looking at the + * actual device node. */ + + if (!PATH_STARTSWITH_SET(path, "/dev/", "/run/systemd/inaccessible/")) + return false; + + if (endswith(path, "/")) /* can't be a device node if it ends in a slash */ + return false; + + return path_is_normalized(path); +} + +bool valid_device_allow_pattern(const char *path) { + assert(path); + + /* Like valid_device_node_path(), but also allows full-subsystem expressions, like DeviceAllow= and DeviceDeny= + * accept it */ + + if (STARTSWITH_SET(path, "block-", "char-")) + return true; + + return valid_device_node_path(path); +} + +int systemd_installation_has_version(const char *root, unsigned minimal_version) { + const char *pattern; + int r; + + /* Try to guess if systemd installation is later than the specified version. This + * is hacky and likely to yield false negatives, particularly if the installation + * is non-standard. False positives should be relatively rare. + */ + + NULSTR_FOREACH(pattern, + /* /lib works for systems without usr-merge, and for systems with a sane + * usr-merge, where /lib is a symlink to /usr/lib. /usr/lib is necessary + * for Gentoo which does a merge without making /lib a symlink. + */ + "lib/systemd/libsystemd-shared-*.so\0" + "lib64/systemd/libsystemd-shared-*.so\0" + "usr/lib/systemd/libsystemd-shared-*.so\0" + "usr/lib64/systemd/libsystemd-shared-*.so\0") { + + _cleanup_strv_free_ char **names = NULL; + _cleanup_free_ char *path = NULL; + char *c, **name; + + path = prefix_root(root, pattern); + if (!path) + return -ENOMEM; + + r = glob_extend(&names, path); + if (r == -ENOENT) + continue; + if (r < 0) + return r; + + assert_se(c = endswith(path, "*.so")); + *c = '\0'; /* truncate the glob part */ + + STRV_FOREACH(name, names) { + /* This is most likely to run only once, hence let's not optimize anything. */ + char *t, *t2; + unsigned version; + + t = startswith(*name, path); + if (!t) + continue; + + t2 = endswith(t, ".so"); + if (!t2) + continue; + + t2[0] = '\0'; /* truncate the suffix */ + + r = safe_atou(t, &version); + if (r < 0) { + log_debug_errno(r, "Found libsystemd shared at \"%s.so\", but failed to parse version: %m", *name); + continue; + } + + log_debug("Found libsystemd shared at \"%s.so\", version %u (%s).", + *name, version, + version >= minimal_version ? "OK" : "too old"); + if (version >= minimal_version) + return true; + } + } + + return false; +} +#endif /* NM_IGNORED */ + +bool dot_or_dot_dot(const char *path) { + if (!path) + return false; + if (path[0] != '.') + return false; + if (path[1] == 0) + return true; + if (path[1] != '.') + return false; + + return path[2] == 0; +} + +#if 0 /* NM_IGNORED */ +bool empty_or_root(const char *root) { + + /* For operations relative to some root directory, returns true if the specified root directory is redundant, + * i.e. either / or NULL or the empty string or any equivalent. */ + + if (!root) + return true; + + return root[strspn(root, "/")] == 0; +} + +int path_simplify_and_warn( + char *path, + unsigned flag, + const char *unit, + const char *filename, + unsigned line, + const char *lvalue) { + + bool absolute, fatal = flag & PATH_CHECK_FATAL; + + assert(!FLAGS_SET(flag, PATH_CHECK_ABSOLUTE | PATH_CHECK_RELATIVE)); + + if (!utf8_is_valid(path)) { + log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, path); + return -EINVAL; + } + + if (flag & (PATH_CHECK_ABSOLUTE | PATH_CHECK_RELATIVE)) { + absolute = path_is_absolute(path); + + if (!absolute && (flag & PATH_CHECK_ABSOLUTE)) { + log_syntax(unit, LOG_ERR, filename, line, 0, + "%s= path is not absolute%s: %s", + lvalue, fatal ? "" : ", ignoring", path); + return -EINVAL; + } + + if (absolute && (flag & PATH_CHECK_RELATIVE)) { + log_syntax(unit, LOG_ERR, filename, line, 0, + "%s= path is absolute%s: %s", + lvalue, fatal ? "" : ", ignoring", path); + return -EINVAL; + } + } + + path_simplify(path, true); + + if (!path_is_normalized(path)) { + log_syntax(unit, LOG_ERR, filename, line, 0, + "%s= path is not normalized%s: %s", + lvalue, fatal ? "" : ", ignoring", path); + return -EINVAL; + } + + if (!path_is_valid(path)) { + log_syntax(unit, LOG_ERR, filename, line, 0, + "%s= path has invalid length (%zu bytes)%s.", + lvalue, strlen(path), fatal ? "" : ", ignoring"); + return -EINVAL; + } + + return 0; +} +#endif /* NM_IGNORED */ |