inetd: use config parser. by Vladimir
function old new delta reread_config_file 1092 2154 +1062 next_line 98 33 -65 next_word 197 57 -140 parse_one_line 1202 - -1202 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/2 up/down: 1062/-1407) Total: -345 bytes
This commit is contained in:
Denis Vlasenko
parent
58680706d7
commit
df6b3ad6ba
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@ -300,9 +300,8 @@ struct globals {
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unsigned max_concurrency;
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smallint alarm_armed;
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uid_t real_uid; /* user ID who ran us */
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unsigned config_lineno;
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const char *config_filename;
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FILE *fconfig;
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parser_t *parser;
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char *default_local_hostname;
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#if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
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char *end_ring;
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@ -327,9 +326,8 @@ struct BUG_G_too_big {
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#define max_concurrency (G.max_concurrency)
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#define alarm_armed (G.alarm_armed )
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#define real_uid (G.real_uid )
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#define config_lineno (G.config_lineno )
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#define config_filename (G.config_filename)
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#define fconfig (G.fconfig )
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#define parser (G.parser )
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#define default_local_hostname (G.default_local_hostname)
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#define first_ps_byte (G.first_ps_byte )
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#define last_ps_byte (G.last_ps_byte )
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@ -543,61 +541,20 @@ static int reopen_config_file(void)
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{
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free(default_local_hostname);
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default_local_hostname = xstrdup("*");
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if (fconfig != NULL)
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fclose(fconfig);
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config_lineno = 0;
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fconfig = fopen_or_warn(config_filename, "r");
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return (fconfig != NULL);
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if (parser != NULL)
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config_close(parser);
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parser = config_open(config_filename);
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return (parser != NULL);
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}
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static void close_config_file(void)
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{
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if (fconfig) {
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fclose(fconfig);
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fconfig = NULL;
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if (parser) {
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config_close(parser);
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parser = NULL;
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}
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}
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static char *next_line(void)
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{
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if (fgets(line, LINE_SIZE, fconfig) == NULL)
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return NULL;
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config_lineno++;
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*strchrnul(line, '\n') = '\0';
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return line;
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}
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static char *next_word(char **cpp)
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{
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char *start;
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char *cp = *cpp;
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if (cp == NULL)
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return NULL;
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again:
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while (*cp == ' ' || *cp == '\t')
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cp++;
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if (*cp == '\0') {
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int c = getc(fconfig);
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ungetc(c, fconfig);
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if (c == ' ' || c == '\t') {
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cp = next_line();
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if (cp)
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goto again;
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}
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*cpp = NULL;
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return NULL;
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}
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start = cp;
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while (*cp && *cp != ' ' && *cp != '\t')
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cp++;
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if (*cp != '\0')
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*cp++ = '\0';
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*cpp = cp;
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return start;
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}
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static void free_servtab_strings(servtab_t *cp)
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{
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int i;
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@ -643,55 +600,49 @@ static servtab_t *dup_servtab(servtab_t *sep)
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}
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/* gcc generates much more code if this is inlined */
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static NOINLINE servtab_t *parse_one_line(void)
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static servtab_t *parse_one_line(void)
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{
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int argc;
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char *p, *cp, *arg;
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char *token[6+MAXARGV];
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char *p, *arg;
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char *hostdelim;
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servtab_t *sep;
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servtab_t *nsep;
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new:
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sep = new_servtab();
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more:
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while ((cp = next_line()) && *cp == '#')
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continue; /* skip comment lines */
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if (cp == NULL) {
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argc = config_read(parser, token, 6+MAXARGV, 1, "# \t", PARSE_NORMAL);
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if (!argc) {
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free(sep);
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return NULL;
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}
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arg = next_word(&cp);
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if (arg == NULL) /* a blank line. */
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goto more;
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/* [host:]service socktype proto wait user[:group] prog [args] */
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/* Check for "host:...." line */
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arg = token[0];
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hostdelim = strrchr(arg, ':');
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if (hostdelim) {
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*hostdelim = '\0';
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sep->se_local_hostname = xstrdup(arg);
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arg = hostdelim + 1;
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if (*arg == '\0') {
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arg = next_word(&cp);
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if (arg == NULL) {
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/* Line has just "host:", change the
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* default host for the following lines. */
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free(default_local_hostname);
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default_local_hostname = sep->se_local_hostname;
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goto more;
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}
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if (*arg == '\0' && argc == 1) {
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/* Line has just "host:", change the
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* default host for the following lines. */
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free(default_local_hostname);
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default_local_hostname = sep->se_local_hostname;
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goto more;
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}
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} else
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sep->se_local_hostname = xstrdup(default_local_hostname);
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/* service socktype proto wait user[:group] prog [args] */
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sep->se_service = xstrdup(arg);
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/* socktype proto wait user[:group] prog [args] */
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arg = next_word(&cp);
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if (arg == NULL) {
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if (argc < 6) {
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parse_err:
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bb_error_msg("parse error on line %u, line is ignored",
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config_lineno);
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parser->lineno);
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free_servtab_strings(sep);
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/* Just "goto more" can make sep to carry over e.g.
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* "rpc"-ness (by having se_rpcver_lo != 0).
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@ -699,6 +650,7 @@ static NOINLINE servtab_t *parse_one_line(void)
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free(sep);
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goto new;
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}
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{
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static int8_t SOCK_xxx[] ALIGN1 = {
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-1,
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@ -708,13 +660,11 @@ static NOINLINE servtab_t *parse_one_line(void)
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sep->se_socktype = SOCK_xxx[1 + index_in_strings(
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"stream""\0" "dgram""\0" "rdm""\0"
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"seqpacket""\0" "raw""\0"
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, arg)];
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, token[1])];
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}
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/* {unix,[rpc/]{tcp,udp}[6]} wait user[:group] prog [args] */
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sep->se_proto = arg = xstrdup(next_word(&cp));
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if (arg == NULL)
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goto parse_err;
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sep->se_proto = arg = xstrdup(token[2]);
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if (strcmp(arg, "unix") == 0) {
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sep->se_family = AF_UNIX;
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} else {
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@ -773,9 +723,7 @@ static NOINLINE servtab_t *parse_one_line(void)
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}
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/* [no]wait[.max] user[:group] prog [args] */
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arg = next_word(&cp);
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if (arg == NULL)
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goto parse_err;
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arg = token[3];
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sep->se_max = max_concurrency;
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p = strchr(arg, '.');
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if (p) {
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@ -791,9 +739,7 @@ static NOINLINE servtab_t *parse_one_line(void)
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goto parse_err;
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/* user[:group] prog [args] */
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sep->se_user = xstrdup(next_word(&cp));
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if (sep->se_user == NULL)
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goto parse_err;
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sep->se_user = xstrdup(token[4]);
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arg = strchr(sep->se_user, '.');
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if (arg == NULL)
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arg = strchr(sep->se_user, ':');
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@ -803,9 +749,7 @@ static NOINLINE servtab_t *parse_one_line(void)
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}
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/* prog [args] */
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sep->se_program = xstrdup(next_word(&cp));
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if (sep->se_program == NULL)
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goto parse_err;
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sep->se_program = xstrdup(token[5]);
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#ifdef INETD_BUILTINS_ENABLED
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if (strcmp(sep->se_program, "internal") == 0
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&& strlen(sep->se_service) <= 7
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@ -826,7 +770,7 @@ static NOINLINE servtab_t *parse_one_line(void)
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}
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#endif
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argc = 0;
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while ((arg = next_word(&cp)) != NULL && argc < MAXARGV)
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while ((arg = token[6+argc]) != NULL && argc < MAXARGV)
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sep->se_argv[argc++] = xstrdup(arg);
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/* catch mixups. "<service> stream udp ..." == wtf */
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@ -839,6 +783,11 @@ static NOINLINE servtab_t *parse_one_line(void)
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goto parse_err;
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}
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// bb_info_msg(
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// "ENTRY[%s][%s][%s][%d][%d][%d][%d][%d][%s][%s][%s]",
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// sep->se_local_hostname, sep->se_service, sep->se_proto, sep->se_wait, sep->se_proto_no,
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// sep->se_max, sep->se_count, sep->se_time, sep->se_user, sep->se_group, sep->se_program);
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/* check if the hostname specifier is a comma separated list
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* of hostnames. we'll make new entries for each address. */
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while ((hostdelim = strrchr(sep->se_local_hostname, ',')) != NULL) {
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