| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <limits.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| |
| #include "alloc-util.h" |
| #include "conf-files.h" |
| #include "conf-parser.h" |
| #include "extract-word.h" |
| #include "fd-util.h" |
| #include "fs-util.h" |
| #include "log.h" |
| #include "macro.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "process-util.h" |
| #include "signal-util.h" |
| #include "socket-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "syslog-util.h" |
| #include "time-util.h" |
| #include "utf8.h" |
| |
| int config_item_table_lookup( |
| const void *table, |
| const char *section, |
| const char *lvalue, |
| ConfigParserCallback *func, |
| int *ltype, |
| void **data, |
| void *userdata) { |
| |
| const ConfigTableItem *t; |
| |
| assert(table); |
| assert(lvalue); |
| assert(func); |
| assert(ltype); |
| assert(data); |
| |
| for (t = table; t->lvalue; t++) { |
| |
| if (!streq(lvalue, t->lvalue)) |
| continue; |
| |
| if (!streq_ptr(section, t->section)) |
| continue; |
| |
| *func = t->parse; |
| *ltype = t->ltype; |
| *data = t->data; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| int config_item_perf_lookup( |
| const void *table, |
| const char *section, |
| const char *lvalue, |
| ConfigParserCallback *func, |
| int *ltype, |
| void **data, |
| void *userdata) { |
| |
| ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table; |
| const ConfigPerfItem *p; |
| |
| assert(table); |
| assert(lvalue); |
| assert(func); |
| assert(ltype); |
| assert(data); |
| |
| if (!section) |
| p = lookup(lvalue, strlen(lvalue)); |
| else { |
| char *key; |
| |
| key = strjoin(section, ".", lvalue, NULL); |
| if (!key) |
| return -ENOMEM; |
| |
| p = lookup(key, strlen(key)); |
| free(key); |
| } |
| |
| if (!p) |
| return 0; |
| |
| *func = p->parse; |
| *ltype = p->ltype; |
| *data = (uint8_t*) userdata + p->offset; |
| return 1; |
| } |
| |
| /* Run the user supplied parser for an assignment */ |
| static int next_assignment(const char *unit, |
| const char *filename, |
| unsigned line, |
| ConfigItemLookup lookup, |
| const void *table, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| const char *rvalue, |
| bool relaxed, |
| void *userdata) { |
| |
| ConfigParserCallback func = NULL; |
| int ltype = 0; |
| void *data = NULL; |
| int r; |
| |
| assert(filename); |
| assert(line > 0); |
| assert(lookup); |
| assert(lvalue); |
| assert(rvalue); |
| |
| r = lookup(table, section, lvalue, &func, <ype, &data, userdata); |
| if (r < 0) |
| return r; |
| |
| if (r > 0) { |
| if (func) |
| return func(unit, filename, line, section, section_line, |
| lvalue, ltype, rvalue, data, userdata); |
| |
| return 0; |
| } |
| |
| /* Warn about unknown non-extension fields. */ |
| if (!relaxed && !startswith(lvalue, "X-")) |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section); |
| |
| return 0; |
| } |
| |
| /* Parse a variable assignment line */ |
| static int parse_line(const char* unit, |
| const char *filename, |
| unsigned line, |
| const char *sections, |
| ConfigItemLookup lookup, |
| const void *table, |
| bool relaxed, |
| bool allow_include, |
| char **section, |
| unsigned *section_line, |
| bool *section_ignored, |
| char *l, |
| void *userdata) { |
| |
| char *e; |
| |
| assert(filename); |
| assert(line > 0); |
| assert(lookup); |
| assert(l); |
| |
| l = strstrip(l); |
| |
| if (!*l) |
| return 0; |
| |
| if (strchr(COMMENTS "\n", *l)) |
| return 0; |
| |
| if (startswith(l, ".include ")) { |
| _cleanup_free_ char *fn = NULL; |
| |
| /* .includes are a bad idea, we only support them here |
| * for historical reasons. They create cyclic include |
| * problems and make it difficult to detect |
| * configuration file changes with an easy |
| * stat(). Better approaches, such as .d/ drop-in |
| * snippets exist. |
| * |
| * Support for them should be eventually removed. */ |
| |
| if (!allow_include) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring."); |
| return 0; |
| } |
| |
| fn = file_in_same_dir(filename, strstrip(l+9)); |
| if (!fn) |
| return -ENOMEM; |
| |
| return config_parse(unit, fn, NULL, sections, lookup, table, relaxed, false, false, userdata); |
| } |
| |
| if (*l == '[') { |
| size_t k; |
| char *n; |
| |
| k = strlen(l); |
| assert(k > 0); |
| |
| if (l[k-1] != ']') { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l); |
| return -EBADMSG; |
| } |
| |
| n = strndup(l+1, k-2); |
| if (!n) |
| return -ENOMEM; |
| |
| if (sections && !nulstr_contains(sections, n)) { |
| |
| if (!relaxed && !startswith(n, "X-")) |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n); |
| |
| free(n); |
| *section = mfree(*section); |
| *section_line = 0; |
| *section_ignored = true; |
| } else { |
| free(*section); |
| *section = n; |
| *section_line = line; |
| *section_ignored = false; |
| } |
| |
| return 0; |
| } |
| |
| if (sections && !*section) { |
| |
| if (!relaxed && !*section_ignored) |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring."); |
| |
| return 0; |
| } |
| |
| e = strchr(l, '='); |
| if (!e) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='."); |
| return -EINVAL; |
| } |
| |
| *e = 0; |
| e++; |
| |
| return next_assignment(unit, |
| filename, |
| line, |
| lookup, |
| table, |
| *section, |
| *section_line, |
| strstrip(l), |
| strstrip(e), |
| relaxed, |
| userdata); |
| } |
| |
| /* Go through the file and parse each line */ |
| int config_parse(const char *unit, |
| const char *filename, |
| FILE *f, |
| const char *sections, |
| ConfigItemLookup lookup, |
| const void *table, |
| bool relaxed, |
| bool allow_include, |
| bool warn, |
| void *userdata) { |
| |
| _cleanup_free_ char *section = NULL, *continuation = NULL; |
| _cleanup_fclose_ FILE *ours = NULL; |
| unsigned line = 0, section_line = 0; |
| bool section_ignored = false, allow_bom = true; |
| int r; |
| |
| assert(filename); |
| assert(lookup); |
| |
| if (!f) { |
| f = ours = fopen(filename, "re"); |
| if (!f) { |
| /* Only log on request, except for ENOENT, |
| * since we return 0 to the caller. */ |
| if (warn || errno == ENOENT) |
| log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR, |
| "Failed to open configuration file '%s': %m", filename); |
| return errno == ENOENT ? 0 : -errno; |
| } |
| } |
| |
| fd_warn_permissions(filename, fileno(f)); |
| |
| for (;;) { |
| char buf[LINE_MAX], *l, *p, *c = NULL, *e; |
| bool escaped = false; |
| |
| if (!fgets(buf, sizeof buf, f)) { |
| if (feof(f)) |
| break; |
| |
| log_error_errno(errno, "Failed to read configuration file '%s': %m", filename); |
| return -errno; |
| } |
| |
| l = buf; |
| if (allow_bom && startswith(l, UTF8_BYTE_ORDER_MARK)) |
| l += strlen(UTF8_BYTE_ORDER_MARK); |
| allow_bom = false; |
| |
| truncate_nl(l); |
| |
| if (continuation) { |
| c = strappend(continuation, l); |
| if (!c) { |
| if (warn) |
| log_oom(); |
| return -ENOMEM; |
| } |
| |
| continuation = mfree(continuation); |
| p = c; |
| } else |
| p = l; |
| |
| for (e = p; *e; e++) { |
| if (escaped) |
| escaped = false; |
| else if (*e == '\\') |
| escaped = true; |
| } |
| |
| if (escaped) { |
| *(e-1) = ' '; |
| |
| if (c) |
| continuation = c; |
| else { |
| continuation = strdup(l); |
| if (!continuation) { |
| if (warn) |
| log_oom(); |
| return -ENOMEM; |
| } |
| } |
| |
| continue; |
| } |
| |
| r = parse_line(unit, |
| filename, |
| ++line, |
| sections, |
| lookup, |
| table, |
| relaxed, |
| allow_include, |
| §ion, |
| §ion_line, |
| §ion_ignored, |
| p, |
| userdata); |
| free(c); |
| |
| if (r < 0) { |
| if (warn) |
| log_warning_errno(r, "Failed to parse file '%s': %m", |
| filename); |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Parse each config file in the specified directories. */ |
| int config_parse_many(const char *conf_file, |
| const char *conf_file_dirs, |
| const char *sections, |
| ConfigItemLookup lookup, |
| const void *table, |
| bool relaxed, |
| void *userdata) { |
| _cleanup_strv_free_ char **files = NULL; |
| char **fn; |
| int r; |
| |
| r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs); |
| if (r < 0) |
| return r; |
| |
| if (conf_file) { |
| r = config_parse(NULL, conf_file, NULL, sections, lookup, table, relaxed, false, true, userdata); |
| if (r < 0) |
| return r; |
| } |
| |
| STRV_FOREACH(fn, files) { |
| r = config_parse(NULL, *fn, NULL, sections, lookup, table, relaxed, false, true, userdata); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| #define DEFINE_PARSER(type, vartype, conv_func) \ |
| int config_parse_##type( \ |
| 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) { \ |
| \ |
| vartype *i = data; \ |
| int r; \ |
| \ |
| assert(filename); \ |
| assert(lvalue); \ |
| assert(rvalue); \ |
| assert(data); \ |
| \ |
| r = conv_func(rvalue, i); \ |
| if (r < 0) \ |
| log_syntax(unit, LOG_ERR, filename, line, r, \ |
| "Failed to parse %s value, ignoring: %s", \ |
| #type, rvalue); \ |
| \ |
| return 0; \ |
| } \ |
| struct __useless_struct_to_allow_trailing_semicolon__ |
| |
| DEFINE_PARSER(int, int, safe_atoi); |
| DEFINE_PARSER(long, long, safe_atoli); |
| DEFINE_PARSER(uint32, uint32_t, safe_atou32); |
| DEFINE_PARSER(uint64, uint64_t, safe_atou64); |
| DEFINE_PARSER(unsigned, unsigned, safe_atou); |
| DEFINE_PARSER(double, double, safe_atod); |
| DEFINE_PARSER(nsec, nsec_t, parse_nsec); |
| DEFINE_PARSER(sec, usec_t, parse_sec); |
| DEFINE_PARSER(mode, mode_t, parse_mode); |
| |
| int config_parse_iec_size(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) { |
| |
| size_t *sz = data; |
| uint64_t v; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = parse_size(rvalue, 1024, &v); |
| if (r < 0 || (uint64_t) (size_t) v != v) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *sz = (size_t) v; |
| return 0; |
| } |
| |
| int config_parse_si_size(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) { |
| |
| size_t *sz = data; |
| uint64_t v; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = parse_size(rvalue, 1000, &v); |
| if (r < 0 || (uint64_t) (size_t) v != v) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *sz = (size_t) v; |
| return 0; |
| } |
| |
| int config_parse_iec_uint64(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) { |
| |
| uint64_t *bytes = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = parse_size(rvalue, 1024, bytes); |
| if (r < 0) |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue); |
| |
| return 0; |
| } |
| |
| int config_parse_bool(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 k; |
| bool *b = data; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| k = parse_boolean(rvalue); |
| if (k < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *b = !!k; |
| return 0; |
| } |
| |
| int config_parse_tristate( |
| 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 k, *t = data; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| /* A tristate is pretty much a boolean, except that it can |
| * also take the special value -1, indicating "uninitialized", |
| * much like NULL is for a pointer type. */ |
| |
| k = parse_boolean(rvalue); |
| if (k < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *t = !!k; |
| return 0; |
| } |
| |
| int config_parse_string( |
| 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) { |
| |
| char **s = data, *n; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (!utf8_is_valid(rvalue)) { |
| log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue); |
| return 0; |
| } |
| |
| if (isempty(rvalue)) |
| n = NULL; |
| else { |
| n = strdup(rvalue); |
| if (!n) |
| return log_oom(); |
| } |
| |
| free(*s); |
| *s = n; |
| |
| return 0; |
| } |
| |
| int config_parse_path( |
| 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) { |
| |
| char **s = data, *n; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (!utf8_is_valid(rvalue)) { |
| log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue); |
| return 0; |
| } |
| |
| if (!path_is_absolute(rvalue)) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Not an absolute path, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| n = strdup(rvalue); |
| if (!n) |
| return log_oom(); |
| |
| path_kill_slashes(n); |
| |
| free(*s); |
| *s = n; |
| |
| return 0; |
| } |
| |
| int config_parse_strv(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) { |
| |
| char ***sv = data; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (isempty(rvalue)) { |
| char **empty; |
| |
| /* Empty assignment resets the list. As a special rule |
| * we actually fill in a real empty array here rather |
| * than NULL, since some code wants to know if |
| * something was set at all... */ |
| empty = strv_new(NULL, NULL); |
| if (!empty) |
| return log_oom(); |
| |
| strv_free(*sv); |
| *sv = empty; |
| return 0; |
| } |
| |
| for (;;) { |
| char *word = NULL; |
| int r; |
| r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE); |
| if (r == 0) |
| break; |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue); |
| break; |
| } |
| |
| if (!utf8_is_valid(word)) { |
| log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue); |
| free(word); |
| continue; |
| } |
| r = strv_consume(sv, word); |
| if (r < 0) |
| return log_oom(); |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_log_facility( |
| 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 *o = data, x; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| x = log_facility_unshifted_from_string(rvalue); |
| if (x < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *o = (x << 3) | LOG_PRI(*o); |
| |
| return 0; |
| } |
| |
| int config_parse_log_level( |
| 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 *o = data, x; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| x = log_level_from_string(rvalue); |
| if (x < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *o = (*o & LOG_FACMASK) | x; |
| return 0; |
| } |
| |
| int config_parse_signal( |
| 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 *sig = data, r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(sig); |
| |
| r = signal_from_string_try_harder(rvalue); |
| if (r <= 0) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *sig = r; |
| return 0; |
| } |
| |
| int config_parse_personality( |
| 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) { |
| |
| unsigned long *personality = data, p; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(personality); |
| |
| p = personality_from_string(rvalue); |
| if (p == PERSONALITY_INVALID) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *personality = p; |
| return 0; |
| } |
| |
| int config_parse_ifname( |
| 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) { |
| |
| char **s = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (isempty(rvalue)) { |
| *s = mfree(*s); |
| return 0; |
| } |
| |
| if (!ifname_valid(rvalue)) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| r = free_and_strdup(s, rvalue); |
| if (r < 0) |
| return log_oom(); |
| |
| return 0; |
| } |