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Date:: Thu Jul 22 11:55:29 2021 UTC
Message:: initial commit
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  1 8d1b399b 2021-07-22 op /*
  2 8d1b399b 2021-07-22 op  * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
  3 8d1b399b 2021-07-22 op  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
  4 8d1b399b 2021-07-22 op  *
  5 8d1b399b 2021-07-22 op  * Permission to use, copy, modify, and distribute this software for any
  6 8d1b399b 2021-07-22 op  * purpose with or without fee is hereby granted, provided that the above
  7 8d1b399b 2021-07-22 op  * copyright notice and this permission notice appear in all copies.
  8 8d1b399b 2021-07-22 op  *
  9 8d1b399b 2021-07-22 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 10 8d1b399b 2021-07-22 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 11 8d1b399b 2021-07-22 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 12 8d1b399b 2021-07-22 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 13 8d1b399b 2021-07-22 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 14 8d1b399b 2021-07-22 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 15 8d1b399b 2021-07-22 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 16 8d1b399b 2021-07-22 op  */
 17 8d1b399b 2021-07-22 op 
 18 8d1b399b 2021-07-22 op #include <stdio.h>
 19 8d1b399b 2021-07-22 op #include <string.h>
 20 8d1b399b 2021-07-22 op 
 21 8d1b399b 2021-07-22 op #include "ctl_parser.h"
 22 8d1b399b 2021-07-22 op #include "kamid.h"
 23 8d1b399b 2021-07-22 op 
 24 8d1b399b 2021-07-22 op enum token_type {
 25 8d1b399b 2021-07-22 op 	NOTOKEN,
 26 8d1b399b 2021-07-22 op 	ENDTOKEN,
 27 8d1b399b 2021-07-22 op 	KEYWORD,
 28 8d1b399b 2021-07-22 op };
 29 8d1b399b 2021-07-22 op 
 30 8d1b399b 2021-07-22 op 
 31 8d1b399b 2021-07-22 op struct token {
 32 8d1b399b 2021-07-22 op 	enum token_type		 type;
 33 8d1b399b 2021-07-22 op 	const char		*keyword;
 34 8d1b399b 2021-07-22 op 	int			 value;
 35 8d1b399b 2021-07-22 op 	const struct token	*next;
 36 8d1b399b 2021-07-22 op };
 37 8d1b399b 2021-07-22 op 
 38 8d1b399b 2021-07-22 op static const struct token t_main[];
 39 8d1b399b 2021-07-22 op static const struct token t_log[];
 40 8d1b399b 2021-07-22 op 
 41 8d1b399b 2021-07-22 op static const struct token t_main[] = {
 42 8d1b399b 2021-07-22 op 	{KEYWORD,	"reload",	RELOAD,		NULL},
 43 8d1b399b 2021-07-22 op 	{KEYWORD,	"log",		NONE,		t_log},
 44 8d1b399b 2021-07-22 op 	{ENDTOKEN,	"",		NONE,		NULL},
 45 8d1b399b 2021-07-22 op };
 46 8d1b399b 2021-07-22 op 
 47 8d1b399b 2021-07-22 op static const struct token t_log[] = {
 48 8d1b399b 2021-07-22 op 	{KEYWORD,	"verbose",	LOG_VERBOSE,	NULL},
 49 8d1b399b 2021-07-22 op 	{KEYWORD,	"brief",	LOG_BRIEF,	NULL},
 50 8d1b399b 2021-07-22 op 	{ENDTOKEN,	"",		NONE,		NULL},
 51 8d1b399b 2021-07-22 op };
 52 8d1b399b 2021-07-22 op 
 53 8d1b399b 2021-07-22 op static const struct token *match_token(const char *, const struct token *,
 54 8d1b399b 2021-07-22 op     struct parse_result *);
 55 8d1b399b 2021-07-22 op static void show_valid_args(const struct token *);
 56 8d1b399b 2021-07-22 op 
 57 8d1b399b 2021-07-22 op struct parse_result *
 58 8d1b399b 2021-07-22 op parse(int argc, char **argv)
 59 8d1b399b 2021-07-22 op {
 60 8d1b399b 2021-07-22 op 	static struct parse_result	 res;
 61 8d1b399b 2021-07-22 op 	const struct token		*table = t_main;
 62 8d1b399b 2021-07-22 op 	const struct token		*match;
 63 8d1b399b 2021-07-22 op 
 64 8d1b399b 2021-07-22 op 	memset(&res, 0, sizeof(res));
 65 8d1b399b 2021-07-22 op 
 66 8d1b399b 2021-07-22 op 	while (argc >= 0) {
 67 8d1b399b 2021-07-22 op 		if ((match = match_token(argv[0], table, &res)) == NULL) {
 68 8d1b399b 2021-07-22 op 			fprintf(stderr, "valid commands/args:\n");
 69 8d1b399b 2021-07-22 op 			show_valid_args(table);
 70 8d1b399b 2021-07-22 op 			return NULL;
 71 8d1b399b 2021-07-22 op 		}
 72 8d1b399b 2021-07-22 op 
 73 8d1b399b 2021-07-22 op 		argc--;
 74 8d1b399b 2021-07-22 op 		argv++;
 75 8d1b399b 2021-07-22 op 
 76 8d1b399b 2021-07-22 op 		if (match->type == NOTOKEN || match->next == NULL)
 77 8d1b399b 2021-07-22 op 			break;
 78 8d1b399b 2021-07-22 op 
 79 8d1b399b 2021-07-22 op 		table = match->next;
 80 8d1b399b 2021-07-22 op 	}
 81 8d1b399b 2021-07-22 op 
 82 8d1b399b 2021-07-22 op 	if (argc > 0) {
 83 8d1b399b 2021-07-22 op 		fprintf(stderr, "superfluous argument: %s\n", argv[0]);
 84 8d1b399b 2021-07-22 op 		return NULL;
 85 8d1b399b 2021-07-22 op 	}
 86 8d1b399b 2021-07-22 op 
 87 8d1b399b 2021-07-22 op 	return &res;
 88 8d1b399b 2021-07-22 op }
 89 8d1b399b 2021-07-22 op 
 90 8d1b399b 2021-07-22 op static const struct token *
 91 8d1b399b 2021-07-22 op match_token(const char *word, const struct token *table,
 92 8d1b399b 2021-07-22 op     struct parse_result *res)
 93 8d1b399b 2021-07-22 op {
 94 8d1b399b 2021-07-22 op 	size_t			 i, match;
 95 8d1b399b 2021-07-22 op 	const struct token	*t = NULL;
 96 8d1b399b 2021-07-22 op 
 97 8d1b399b 2021-07-22 op 	match = 0;
 98 8d1b399b 2021-07-22 op 
 99 8d1b399b 2021-07-22 op 	for (i = 0; table[i].type != ENDTOKEN; i++) {
100 8d1b399b 2021-07-22 op 		switch (table[i].type) {
101 8d1b399b 2021-07-22 op 		case NOTOKEN:
102 8d1b399b 2021-07-22 op 			if (word == NULL || strlen(word) == 0) {
103 8d1b399b 2021-07-22 op 				match++;
104 8d1b399b 2021-07-22 op 				t = &table[i];
105 8d1b399b 2021-07-22 op 			}
106 8d1b399b 2021-07-22 op 			break;
107 8d1b399b 2021-07-22 op 		case KEYWORD:
108 8d1b399b 2021-07-22 op 			if (word != NULL && strncmp(word, table[i].keyword,
109 8d1b399b 2021-07-22 op 			    strlen(word)) == 0) {
110 8d1b399b 2021-07-22 op 				match++;
111 8d1b399b 2021-07-22 op 				t = &table[i];
112 8d1b399b 2021-07-22 op 				if (t->value)
113 8d1b399b 2021-07-22 op 					res->action = t->value;
114 8d1b399b 2021-07-22 op 			}
115 8d1b399b 2021-07-22 op 			break;
116 8d1b399b 2021-07-22 op 		case ENDTOKEN:
117 8d1b399b 2021-07-22 op 			break;
118 8d1b399b 2021-07-22 op 		}
119 8d1b399b 2021-07-22 op 	}
120 8d1b399b 2021-07-22 op 
121 8d1b399b 2021-07-22 op 	if (match != 1) {
122 8d1b399b 2021-07-22 op 		if (word == NULL)
123 8d1b399b 2021-07-22 op 			fprintf(stderr, "missing argument:\n");
124 8d1b399b 2021-07-22 op 		else if (match > 1)
125 8d1b399b 2021-07-22 op 			fprintf(stderr, "ambiuous argument: %s\n", word);
126 8d1b399b 2021-07-22 op 		else if (match < 1)
127 8d1b399b 2021-07-22 op 			fprintf(stderr, "unknown argument: %s\n", word);
128 8d1b399b 2021-07-22 op 		return NULL;
129 8d1b399b 2021-07-22 op 	}
130 8d1b399b 2021-07-22 op 
131 8d1b399b 2021-07-22 op 	return t;
132 8d1b399b 2021-07-22 op }
133 8d1b399b 2021-07-22 op 
134 8d1b399b 2021-07-22 op static void
135 8d1b399b 2021-07-22 op show_valid_args(const struct token *table)
136 8d1b399b 2021-07-22 op {
137 8d1b399b 2021-07-22 op 	int i;
138 8d1b399b 2021-07-22 op 
139 8d1b399b 2021-07-22 op 	for (i = 0; table[i].type != ENDTOKEN; i++) {
140 8d1b399b 2021-07-22 op 		switch (table[i].type) {
141 8d1b399b 2021-07-22 op 		case NOTOKEN:
142 8d1b399b 2021-07-22 op 			fprintf(stderr, "  <cr>\n");
143 8d1b399b 2021-07-22 op 			break;
144 8d1b399b 2021-07-22 op 		case KEYWORD:
145 8d1b399b 2021-07-22 op 			fprintf(stderr, "  %s\n", table[i].keyword);
146 8d1b399b 2021-07-22 op 			break;
147 8d1b399b 2021-07-22 op 		case ENDTOKEN:
148 8d1b399b 2021-07-22 op 			break;
149 8d1b399b 2021-07-22 op 		}
150 8d1b399b 2021-07-22 op 	}
151 8d1b399b 2021-07-22 op }