| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| |
| #include "sd-id128.h" |
| |
| #include "alloc-util.h" |
| #include "glob-util.h" |
| #include "hexdecoct.h" |
| #include "memory-util.h" |
| #include "path-util.h" |
| #include "random-util.h" |
| #include "sparse-endian.h" |
| #include "special.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "unit-name.h" |
| |
| /* Characters valid in a unit name. */ |
| #define VALID_CHARS \ |
| DIGITS \ |
| LETTERS \ |
| ":-_.\\" |
| |
| /* The same, but also permits the single @ character that may appear */ |
| #define VALID_CHARS_WITH_AT \ |
| "@" \ |
| VALID_CHARS |
| |
| /* All chars valid in a unit name glob */ |
| #define VALID_CHARS_GLOB \ |
| VALID_CHARS_WITH_AT \ |
| "[]!-*?" |
| |
| #define LONG_UNIT_NAME_HASH_KEY SD_ID128_MAKE(ec,f2,37,fb,58,32,4a,32,84,9f,06,9b,0d,21,eb,9a) |
| #define UNIT_NAME_HASH_LENGTH_CHARS 16 |
| |
| bool unit_name_is_valid(const char *n, UnitNameFlags flags) { |
| const char *e, *i, *at; |
| |
| assert((flags & ~(UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) == 0); |
| |
| if (_unlikely_(flags == 0)) |
| return false; |
| |
| if (isempty(n)) |
| return false; |
| |
| if (strlen(n) >= UNIT_NAME_MAX) |
| return false; |
| |
| e = strrchr(n, '.'); |
| if (!e || e == n) |
| return false; |
| |
| if (unit_type_from_string(e + 1) < 0) |
| return false; |
| |
| for (i = n, at = NULL; i < e; i++) { |
| |
| if (*i == '@' && !at) |
| at = i; |
| |
| if (!strchr(VALID_CHARS_WITH_AT, *i)) |
| return false; |
| } |
| |
| if (at == n) |
| return false; |
| |
| if (flags & UNIT_NAME_PLAIN) |
| if (!at) |
| return true; |
| |
| if (flags & UNIT_NAME_INSTANCE) |
| if (at && e > at + 1) |
| return true; |
| |
| if (flags & UNIT_NAME_TEMPLATE) |
| if (at && e == at + 1) |
| return true; |
| |
| return false; |
| } |
| |
| bool unit_prefix_is_valid(const char *p) { |
| |
| /* We don't allow additional @ in the prefix string */ |
| |
| if (isempty(p)) |
| return false; |
| |
| return in_charset(p, VALID_CHARS); |
| } |
| |
| bool unit_instance_is_valid(const char *i) { |
| |
| /* The max length depends on the length of the string, so we |
| * don't really check this here. */ |
| |
| if (isempty(i)) |
| return false; |
| |
| /* We allow additional @ in the instance string, we do not |
| * allow them in the prefix! */ |
| |
| return in_charset(i, "@" VALID_CHARS); |
| } |
| |
| bool unit_suffix_is_valid(const char *s) { |
| if (isempty(s)) |
| return false; |
| |
| if (s[0] != '.') |
| return false; |
| |
| if (unit_type_from_string(s + 1) < 0) |
| return false; |
| |
| return true; |
| } |
| |
| int unit_name_to_prefix(const char *n, char **ret) { |
| const char *p; |
| char *s; |
| |
| assert(n); |
| assert(ret); |
| |
| if (!unit_name_is_valid(n, UNIT_NAME_ANY)) |
| return -EINVAL; |
| |
| p = strchr(n, '@'); |
| if (!p) |
| p = strrchr(n, '.'); |
| |
| assert_se(p); |
| |
| s = strndup(n, p - n); |
| if (!s) |
| return -ENOMEM; |
| |
| *ret = s; |
| return 0; |
| } |
| |
| UnitNameFlags unit_name_to_instance(const char *n, char **ret) { |
| const char *p, *d; |
| |
| assert(n); |
| |
| if (!unit_name_is_valid(n, UNIT_NAME_ANY)) |
| return -EINVAL; |
| |
| /* Everything past the first @ and before the last . is the instance */ |
| p = strchr(n, '@'); |
| if (!p) { |
| if (ret) |
| *ret = NULL; |
| return UNIT_NAME_PLAIN; |
| } |
| |
| p++; |
| |
| d = strrchr(p, '.'); |
| if (!d) |
| return -EINVAL; |
| |
| if (ret) { |
| char *i = strndup(p, d-p); |
| if (!i) |
| return -ENOMEM; |
| |
| *ret = i; |
| } |
| return d > p ? UNIT_NAME_INSTANCE : UNIT_NAME_TEMPLATE; |
| } |
| |
| int unit_name_to_prefix_and_instance(const char *n, char **ret) { |
| const char *d; |
| char *s; |
| |
| assert(n); |
| assert(ret); |
| |
| if (!unit_name_is_valid(n, UNIT_NAME_ANY)) |
| return -EINVAL; |
| |
| d = strrchr(n, '.'); |
| if (!d) |
| return -EINVAL; |
| |
| s = strndup(n, d - n); |
| if (!s) |
| return -ENOMEM; |
| |
| *ret = s; |
| return 0; |
| } |
| |
| UnitType unit_name_to_type(const char *n) { |
| const char *e; |
| |
| assert(n); |
| |
| if (!unit_name_is_valid(n, UNIT_NAME_ANY)) |
| return _UNIT_TYPE_INVALID; |
| |
| assert_se(e = strrchr(n, '.')); |
| |
| return unit_type_from_string(e + 1); |
| } |
| |
| int unit_name_change_suffix(const char *n, const char *suffix, char **ret) { |
| _cleanup_free_ char *s = NULL; |
| size_t a, b; |
| char *e; |
| |
| assert(n); |
| assert(suffix); |
| assert(ret); |
| |
| if (!unit_name_is_valid(n, UNIT_NAME_ANY)) |
| return -EINVAL; |
| |
| if (!unit_suffix_is_valid(suffix)) |
| return -EINVAL; |
| |
| assert_se(e = strrchr(n, '.')); |
| |
| a = e - n; |
| b = strlen(suffix); |
| |
| s = new(char, a + b + 1); |
| if (!s) |
| return -ENOMEM; |
| |
| strcpy(mempcpy(s, n, a), suffix); |
| |
| /* Make sure the name is still valid (i.e. didn't grow too large due to longer suffix) */ |
| if (!unit_name_is_valid(s, UNIT_NAME_ANY)) |
| return -EINVAL; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| int unit_name_build(const char *prefix, const char *instance, const char *suffix, char **ret) { |
| UnitType type; |
| |
| assert(prefix); |
| assert(suffix); |
| assert(ret); |
| |
| if (suffix[0] != '.') |
| return -EINVAL; |
| |
| type = unit_type_from_string(suffix + 1); |
| if (type < 0) |
| return type; |
| |
| return unit_name_build_from_type(prefix, instance, type, ret); |
| } |
| |
| int unit_name_build_from_type(const char *prefix, const char *instance, UnitType type, char **ret) { |
| _cleanup_free_ char *s = NULL; |
| const char *ut; |
| |
| assert(prefix); |
| assert(type >= 0); |
| assert(type < _UNIT_TYPE_MAX); |
| assert(ret); |
| |
| if (!unit_prefix_is_valid(prefix)) |
| return -EINVAL; |
| |
| ut = unit_type_to_string(type); |
| |
| if (instance) { |
| if (!unit_instance_is_valid(instance)) |
| return -EINVAL; |
| |
| s = strjoin(prefix, "@", instance, ".", ut); |
| } else |
| s = strjoin(prefix, ".", ut); |
| if (!s) |
| return -ENOMEM; |
| |
| /* Verify that this didn't grow too large (or otherwise is invalid) */ |
| if (!unit_name_is_valid(s, instance ? UNIT_NAME_INSTANCE : UNIT_NAME_PLAIN)) |
| return -EINVAL; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| static char *do_escape_char(char c, char *t) { |
| assert(t); |
| |
| *(t++) = '\\'; |
| *(t++) = 'x'; |
| *(t++) = hexchar(c >> 4); |
| *(t++) = hexchar(c); |
| |
| return t; |
| } |
| |
| static char *do_escape(const char *f, char *t) { |
| assert(f); |
| assert(t); |
| |
| /* do not create units with a leading '.', like for "/.dotdir" mount points */ |
| if (*f == '.') { |
| t = do_escape_char(*f, t); |
| f++; |
| } |
| |
| for (; *f; f++) { |
| if (*f == '/') |
| *(t++) = '-'; |
| else if (IN_SET(*f, '-', '\\') || !strchr(VALID_CHARS, *f)) |
| t = do_escape_char(*f, t); |
| else |
| *(t++) = *f; |
| } |
| |
| return t; |
| } |
| |
| char *unit_name_escape(const char *f) { |
| char *r, *t; |
| |
| assert(f); |
| |
| r = new(char, strlen(f)*4+1); |
| if (!r) |
| return NULL; |
| |
| t = do_escape(f, r); |
| *t = 0; |
| |
| return r; |
| } |
| |
| int unit_name_unescape(const char *f, char **ret) { |
| _cleanup_free_ char *r = NULL; |
| char *t; |
| |
| assert(f); |
| |
| r = strdup(f); |
| if (!r) |
| return -ENOMEM; |
| |
| for (t = r; *f; f++) { |
| if (*f == '-') |
| *(t++) = '/'; |
| else if (*f == '\\') { |
| int a, b; |
| |
| if (f[1] != 'x') |
| return -EINVAL; |
| |
| a = unhexchar(f[2]); |
| if (a < 0) |
| return -EINVAL; |
| |
| b = unhexchar(f[3]); |
| if (b < 0) |
| return -EINVAL; |
| |
| *(t++) = (char) (((uint8_t) a << 4U) | (uint8_t) b); |
| f += 3; |
| } else |
| *(t++) = *f; |
| } |
| |
| *t = 0; |
| |
| *ret = TAKE_PTR(r); |
| |
| return 0; |
| } |
| |
| int unit_name_path_escape(const char *f, char **ret) { |
| _cleanup_free_ char *p = NULL; |
| char *s; |
| |
| assert(f); |
| assert(ret); |
| |
| p = strdup(f); |
| if (!p) |
| return -ENOMEM; |
| |
| path_simplify(p); |
| |
| if (empty_or_root(p)) |
| s = strdup("-"); |
| else { |
| if (!path_is_normalized(p)) |
| return -EINVAL; |
| |
| /* Truncate trailing slashes and skip leading slashes */ |
| delete_trailing_chars(p, "/"); |
| s = unit_name_escape(skip_leading_chars(p, "/")); |
| } |
| if (!s) |
| return -ENOMEM; |
| |
| *ret = s; |
| return 0; |
| } |
| |
| int unit_name_path_unescape(const char *f, char **ret) { |
| _cleanup_free_ char *s = NULL; |
| int r; |
| |
| assert(f); |
| |
| if (isempty(f)) |
| return -EINVAL; |
| |
| if (streq(f, "-")) { |
| s = strdup("/"); |
| if (!s) |
| return -ENOMEM; |
| } else { |
| _cleanup_free_ char *w = NULL; |
| |
| r = unit_name_unescape(f, &w); |
| if (r < 0) |
| return r; |
| |
| /* Don't accept trailing or leading slashes */ |
| if (startswith(w, "/") || endswith(w, "/")) |
| return -EINVAL; |
| |
| /* Prefix a slash again */ |
| s = strjoin("/", w); |
| if (!s) |
| return -ENOMEM; |
| |
| if (!path_is_normalized(s)) |
| return -EINVAL; |
| } |
| |
| if (ret) |
| *ret = TAKE_PTR(s); |
| |
| return 0; |
| } |
| |
| int unit_name_replace_instance(const char *f, const char *i, char **ret) { |
| _cleanup_free_ char *s = NULL; |
| const char *p, *e; |
| size_t a, b; |
| |
| assert(f); |
| assert(i); |
| assert(ret); |
| |
| if (!unit_name_is_valid(f, UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) |
| return -EINVAL; |
| if (!unit_instance_is_valid(i)) |
| return -EINVAL; |
| |
| assert_se(p = strchr(f, '@')); |
| assert_se(e = strrchr(f, '.')); |
| |
| a = p - f; |
| b = strlen(i); |
| |
| s = new(char, a + 1 + b + strlen(e) + 1); |
| if (!s) |
| return -ENOMEM; |
| |
| strcpy(mempcpy(mempcpy(s, f, a + 1), i, b), e); |
| |
| /* Make sure the resulting name still is valid, i.e. didn't grow too large */ |
| if (!unit_name_is_valid(s, UNIT_NAME_INSTANCE)) |
| return -EINVAL; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| int unit_name_template(const char *f, char **ret) { |
| const char *p, *e; |
| char *s; |
| size_t a; |
| |
| assert(f); |
| assert(ret); |
| |
| if (!unit_name_is_valid(f, UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) |
| return -EINVAL; |
| |
| assert_se(p = strchr(f, '@')); |
| assert_se(e = strrchr(f, '.')); |
| |
| a = p - f; |
| |
| s = new(char, a + 1 + strlen(e) + 1); |
| if (!s) |
| return -ENOMEM; |
| |
| strcpy(mempcpy(s, f, a + 1), e); |
| |
| *ret = s; |
| return 0; |
| } |
| |
| bool unit_name_is_hashed(const char *name) { |
| char *s; |
| |
| if (!unit_name_is_valid(name, UNIT_NAME_PLAIN)) |
| return false; |
| |
| assert_se(s = strrchr(name, '.')); |
| |
| if (s - name < UNIT_NAME_HASH_LENGTH_CHARS + 1) |
| return false; |
| |
| s -= UNIT_NAME_HASH_LENGTH_CHARS; |
| if (s[-1] != '_') |
| return false; |
| |
| for (size_t i = 0; i < UNIT_NAME_HASH_LENGTH_CHARS; i++) |
| if (!strchr(LOWERCASE_HEXDIGITS, s[i])) |
| return false; |
| |
| return true; |
| } |
| |
| int unit_name_hash_long(const char *name, char **ret) { |
| _cleanup_free_ char *n = NULL, *hash = NULL; |
| char *suffix; |
| le64_t h; |
| size_t len; |
| |
| if (strlen(name) < UNIT_NAME_MAX) |
| return -EMSGSIZE; |
| |
| suffix = strrchr(name, '.'); |
| if (!suffix) |
| return -EINVAL; |
| |
| if (unit_type_from_string(suffix+1) < 0) |
| return -EINVAL; |
| |
| h = htole64(siphash24_string(name, LONG_UNIT_NAME_HASH_KEY.bytes)); |
| |
| hash = hexmem(&h, sizeof(h)); |
| if (!hash) |
| return -ENOMEM; |
| |
| assert_se(strlen(hash) == UNIT_NAME_HASH_LENGTH_CHARS); |
| |
| len = UNIT_NAME_MAX - 1 - strlen(suffix+1) - UNIT_NAME_HASH_LENGTH_CHARS - 2; |
| assert(len > 0 && len < UNIT_NAME_MAX); |
| |
| n = strndup(name, len); |
| if (!n) |
| return -ENOMEM; |
| |
| if (!strextend(&n, "_", hash, suffix)) |
| return -ENOMEM; |
| assert_se(unit_name_is_valid(n, UNIT_NAME_PLAIN)); |
| |
| *ret = TAKE_PTR(n); |
| |
| return 0; |
| } |
| |
| int unit_name_from_path(const char *path, const char *suffix, char **ret) { |
| _cleanup_free_ char *p = NULL, *s = NULL; |
| int r; |
| |
| assert(path); |
| assert(suffix); |
| assert(ret); |
| |
| if (!unit_suffix_is_valid(suffix)) |
| return -EINVAL; |
| |
| r = unit_name_path_escape(path, &p); |
| if (r < 0) |
| return r; |
| |
| s = strjoin(p, suffix); |
| if (!s) |
| return -ENOMEM; |
| |
| if (strlen(s) >= UNIT_NAME_MAX) { |
| _cleanup_free_ char *n = NULL; |
| |
| log_debug("Unit name \"%s\" too long, falling back to hashed unit name.", s); |
| |
| r = unit_name_hash_long(s, &n); |
| if (r < 0) |
| return r; |
| |
| free_and_replace(s, n); |
| } |
| |
| /* Refuse if this for some other reason didn't result in a valid name */ |
| if (!unit_name_is_valid(s, UNIT_NAME_PLAIN)) |
| return -EINVAL; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| int unit_name_from_path_instance(const char *prefix, const char *path, const char *suffix, char **ret) { |
| _cleanup_free_ char *p = NULL, *s = NULL; |
| int r; |
| |
| assert(prefix); |
| assert(path); |
| assert(suffix); |
| assert(ret); |
| |
| if (!unit_prefix_is_valid(prefix)) |
| return -EINVAL; |
| |
| if (!unit_suffix_is_valid(suffix)) |
| return -EINVAL; |
| |
| r = unit_name_path_escape(path, &p); |
| if (r < 0) |
| return r; |
| |
| s = strjoin(prefix, "@", p, suffix); |
| if (!s) |
| return -ENOMEM; |
| |
| if (strlen(s) >= UNIT_NAME_MAX) /* Return a slightly more descriptive error for this specific condition */ |
| return -ENAMETOOLONG; |
| |
| /* Refuse if this for some other reason didn't result in a valid name */ |
| if (!unit_name_is_valid(s, UNIT_NAME_INSTANCE)) |
| return -EINVAL; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| int unit_name_to_path(const char *name, char **ret) { |
| _cleanup_free_ char *prefix = NULL; |
| int r; |
| |
| assert(name); |
| |
| r = unit_name_to_prefix(name, &prefix); |
| if (r < 0) |
| return r; |
| |
| if (unit_name_is_hashed(name)) |
| return -ENAMETOOLONG; |
| |
| return unit_name_path_unescape(prefix, ret); |
| } |
| |
| static bool do_escape_mangle(const char *f, bool allow_globs, char *t) { |
| const char *valid_chars; |
| bool mangled = false; |
| |
| assert(f); |
| assert(t); |
| |
| /* We'll only escape the obvious characters here, to play safe. |
| * |
| * Returns true if any characters were mangled, false otherwise. |
| */ |
| |
| valid_chars = allow_globs ? VALID_CHARS_GLOB : VALID_CHARS_WITH_AT; |
| |
| for (; *f; f++) |
| if (*f == '/') { |
| *(t++) = '-'; |
| mangled = true; |
| } else if (!strchr(valid_chars, *f)) { |
| t = do_escape_char(*f, t); |
| mangled = true; |
| } else |
| *(t++) = *f; |
| *t = 0; |
| |
| return mangled; |
| } |
| |
| /** |
| * Convert a string to a unit name. /dev/blah is converted to dev-blah.device, |
| * /blah/blah is converted to blah-blah.mount, anything else is left alone, |
| * except that @suffix is appended if a valid unit suffix is not present. |
| * |
| * If @allow_globs, globs characters are preserved. Otherwise, they are escaped. |
| */ |
| int unit_name_mangle_with_suffix(const char *name, const char *operation, UnitNameMangle flags, const char *suffix, char **ret) { |
| _cleanup_free_ char *s = NULL; |
| bool mangled, suggest_escape = true; |
| int r; |
| |
| assert(name); |
| assert(suffix); |
| assert(ret); |
| |
| if (isempty(name)) /* We cannot mangle empty unit names to become valid, sorry. */ |
| return -EINVAL; |
| |
| if (!unit_suffix_is_valid(suffix)) |
| return -EINVAL; |
| |
| /* Already a fully valid unit name? If so, no mangling is necessary... */ |
| if (unit_name_is_valid(name, UNIT_NAME_ANY)) |
| goto good; |
| |
| /* Already a fully valid globbing expression? If so, no mangling is necessary either... */ |
| if (string_is_glob(name) && in_charset(name, VALID_CHARS_GLOB)) { |
| if (flags & UNIT_NAME_MANGLE_GLOB) |
| goto good; |
| log_full(flags & UNIT_NAME_MANGLE_WARN ? LOG_NOTICE : LOG_DEBUG, |
| "Glob pattern passed%s%s, but globs are not supported for this.", |
| operation ? " " : "", strempty(operation)); |
| suggest_escape = false; |
| } |
| |
| if (is_device_path(name)) { |
| r = unit_name_from_path(name, ".device", ret); |
| if (r >= 0) |
| return 1; |
| if (r != -EINVAL) |
| return r; |
| } |
| |
| if (path_is_absolute(name)) { |
| r = unit_name_from_path(name, ".mount", ret); |
| if (r >= 0) |
| return 1; |
| if (r != -EINVAL) |
| return r; |
| } |
| |
| s = new(char, strlen(name) * 4 + strlen(suffix) + 1); |
| if (!s) |
| return -ENOMEM; |
| |
| mangled = do_escape_mangle(name, flags & UNIT_NAME_MANGLE_GLOB, s); |
| if (mangled) |
| log_full(flags & UNIT_NAME_MANGLE_WARN ? LOG_NOTICE : LOG_DEBUG, |
| "Invalid unit name \"%s\" escaped as \"%s\"%s.", |
| name, s, |
| suggest_escape ? " (maybe you should use systemd-escape?)" : ""); |
| |
| /* Append a suffix if it doesn't have any, but only if this is not a glob, so that we can allow |
| * "foo.*" as a valid glob. */ |
| if ((!(flags & UNIT_NAME_MANGLE_GLOB) || !string_is_glob(s)) && unit_name_to_type(s) < 0) |
| strcat(s, suffix); |
| |
| /* Make sure mangling didn't grow this too large (but don't do this check if globbing is allowed, |
| * since globs generally do not qualify as valid unit names) */ |
| if (!FLAGS_SET(flags, UNIT_NAME_MANGLE_GLOB) && !unit_name_is_valid(s, UNIT_NAME_ANY)) |
| return -EINVAL; |
| |
| *ret = TAKE_PTR(s); |
| return 1; |
| |
| good: |
| s = strdup(name); |
| if (!s) |
| return -ENOMEM; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| int slice_build_parent_slice(const char *slice, char **ret) { |
| _cleanup_free_ char *s = NULL; |
| char *dash; |
| int r; |
| |
| assert(slice); |
| assert(ret); |
| |
| if (!slice_name_is_valid(slice)) |
| return -EINVAL; |
| |
| if (streq(slice, SPECIAL_ROOT_SLICE)) { |
| *ret = NULL; |
| return 0; |
| } |
| |
| s = strdup(slice); |
| if (!s) |
| return -ENOMEM; |
| |
| dash = strrchr(s, '-'); |
| if (dash) |
| strcpy(dash, ".slice"); |
| else { |
| r = free_and_strdup(&s, SPECIAL_ROOT_SLICE); |
| if (r < 0) |
| return r; |
| } |
| |
| *ret = TAKE_PTR(s); |
| return 1; |
| } |
| |
| int slice_build_subslice(const char *slice, const char *name, char **ret) { |
| char *subslice; |
| |
| assert(slice); |
| assert(name); |
| assert(ret); |
| |
| if (!slice_name_is_valid(slice)) |
| return -EINVAL; |
| |
| if (!unit_prefix_is_valid(name)) |
| return -EINVAL; |
| |
| if (streq(slice, SPECIAL_ROOT_SLICE)) |
| subslice = strjoin(name, ".slice"); |
| else { |
| char *e; |
| |
| assert_se(e = endswith(slice, ".slice")); |
| |
| subslice = new(char, (e - slice) + 1 + strlen(name) + 6 + 1); |
| if (!subslice) |
| return -ENOMEM; |
| |
| stpcpy(stpcpy(stpcpy(mempcpy(subslice, slice, e - slice), "-"), name), ".slice"); |
| } |
| |
| *ret = subslice; |
| return 0; |
| } |
| |
| bool slice_name_is_valid(const char *name) { |
| const char *p, *e; |
| bool dash = false; |
| |
| if (!unit_name_is_valid(name, UNIT_NAME_PLAIN)) |
| return false; |
| |
| if (streq(name, SPECIAL_ROOT_SLICE)) |
| return true; |
| |
| e = endswith(name, ".slice"); |
| if (!e) |
| return false; |
| |
| for (p = name; p < e; p++) { |
| |
| if (*p == '-') { |
| |
| /* Don't allow initial dash */ |
| if (p == name) |
| return false; |
| |
| /* Don't allow multiple dashes */ |
| if (dash) |
| return false; |
| |
| dash = true; |
| } else |
| dash = false; |
| } |
| |
| /* Don't allow trailing hash */ |
| if (dash) |
| return false; |
| |
| return true; |
| } |
| |
| bool unit_name_prefix_equal(const char *a, const char *b) { |
| const char *p, *q; |
| |
| assert(a); |
| assert(b); |
| |
| if (!unit_name_is_valid(a, UNIT_NAME_ANY) || !unit_name_is_valid(b, UNIT_NAME_ANY)) |
| return false; |
| |
| p = strchr(a, '@'); |
| if (!p) |
| p = strrchr(a, '.'); |
| |
| q = strchr(b, '@'); |
| if (!q) |
| q = strrchr(b, '.'); |
| |
| assert(p); |
| assert(q); |
| |
| return memcmp_nn(a, p - a, b, q - b) == 0; |
| } |
