#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "sd-messages.h"

#include "alloc-util.h"

#include "conf-files.h"

#include "conf-parser.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 "string-util.h"

#include "strv.h"

#include "syslog-util.h"

#include "utf8.h"

#include "util.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;

}

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, &ltype, &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;

}

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

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);

}

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;

int r;

assert(filename);

assert(lookup);

if (!f) {

f = ours = fopen(filename, "re");

if (!f) {

/* Only log on request, except for ENOENT,

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));

while (!feof(f)) {

char l[LINE_MAX], *p, *c = NULL, *e;

bool escaped = false;

if (!fgets(l, sizeof(l), f)) {

if (feof(f))

break;

log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);

return -errno;

}

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,

&section,

&section_line,

&section_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;

}

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

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;

const char *word, *state;

size_t l;

int r;

assert(filename);

assert(lvalue);

assert(rvalue);

assert(data);

if (isempty(rvalue)) {

char **empty;

/* Empty assignment resets the list. As a special rule

empty = strv_new(NULL, NULL);

if (!empty)

return log_oom();

strv_free(*sv);

*sv = empty;

return 0;

}

FOREACH_WORD_QUOTED(word, l, rvalue, state) {

char *n;

n = strndup(word, l);

if (!n)

return log_oom();

if (!utf8_is_valid(n)) {

log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);

free(n);

continue;

}

r = strv_consume(sv, n);

if (r < 0)

return log_oom();

}

if (!isempty(state))

log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");

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;

}