13914ddf8SEdward Tomasz Napierala /*-
2*4d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause
3abdd3945SEdward Tomasz Napierala *
43914ddf8SEdward Tomasz Napierala * Copyright (c) 2014 The FreeBSD Foundation
53914ddf8SEdward Tomasz Napierala *
63914ddf8SEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship
73914ddf8SEdward Tomasz Napierala * from the FreeBSD Foundation.
83914ddf8SEdward Tomasz Napierala *
93914ddf8SEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without
103914ddf8SEdward Tomasz Napierala * modification, are permitted provided that the following conditions
113914ddf8SEdward Tomasz Napierala * are met:
123914ddf8SEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright
133914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer.
143914ddf8SEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright
153914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the
163914ddf8SEdward Tomasz Napierala * documentation and/or other materials provided with the distribution.
173914ddf8SEdward Tomasz Napierala *
183914ddf8SEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
193914ddf8SEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
203914ddf8SEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
213914ddf8SEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
223914ddf8SEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
233914ddf8SEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
243914ddf8SEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
253914ddf8SEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
263914ddf8SEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
273914ddf8SEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
283914ddf8SEdward Tomasz Napierala * SUCH DAMAGE.
293914ddf8SEdward Tomasz Napierala *
303914ddf8SEdward Tomasz Napierala */
313914ddf8SEdward Tomasz Napierala
323914ddf8SEdward Tomasz Napierala /*
333914ddf8SEdward Tomasz Napierala * All the "defined" stuff is for handling variables,
343914ddf8SEdward Tomasz Napierala * such as ${OSNAME}, in maps.
353914ddf8SEdward Tomasz Napierala */
363914ddf8SEdward Tomasz Napierala
373914ddf8SEdward Tomasz Napierala #include <sys/types.h>
383914ddf8SEdward Tomasz Napierala #include <sys/time.h>
393914ddf8SEdward Tomasz Napierala #include <sys/ioctl.h>
403914ddf8SEdward Tomasz Napierala #include <sys/param.h>
413914ddf8SEdward Tomasz Napierala #include <sys/linker.h>
423914ddf8SEdward Tomasz Napierala #include <sys/mount.h>
433914ddf8SEdward Tomasz Napierala #include <sys/socket.h>
443914ddf8SEdward Tomasz Napierala #include <sys/stat.h>
453914ddf8SEdward Tomasz Napierala #include <sys/wait.h>
463914ddf8SEdward Tomasz Napierala #include <sys/utsname.h>
473914ddf8SEdward Tomasz Napierala #include <assert.h>
483914ddf8SEdward Tomasz Napierala #include <ctype.h>
493914ddf8SEdward Tomasz Napierala #include <errno.h>
503914ddf8SEdward Tomasz Napierala #include <fcntl.h>
513914ddf8SEdward Tomasz Napierala #include <libgen.h>
52592d6e85SEdward Tomasz Napierala #include <libutil.h>
533914ddf8SEdward Tomasz Napierala #include <netdb.h>
543914ddf8SEdward Tomasz Napierala #include <signal.h>
553914ddf8SEdward Tomasz Napierala #include <stdbool.h>
563914ddf8SEdward Tomasz Napierala #include <stdint.h>
573914ddf8SEdward Tomasz Napierala #include <stdio.h>
583914ddf8SEdward Tomasz Napierala #include <stdlib.h>
593914ddf8SEdward Tomasz Napierala #include <string.h>
603914ddf8SEdward Tomasz Napierala #include <unistd.h>
613914ddf8SEdward Tomasz Napierala
623914ddf8SEdward Tomasz Napierala #include "common.h"
633914ddf8SEdward Tomasz Napierala
643914ddf8SEdward Tomasz Napierala static TAILQ_HEAD(, defined_value) defined_values;
653914ddf8SEdward Tomasz Napierala
663914ddf8SEdward Tomasz Napierala static const char *
defined_find(const char * name)673914ddf8SEdward Tomasz Napierala defined_find(const char *name)
683914ddf8SEdward Tomasz Napierala {
693914ddf8SEdward Tomasz Napierala struct defined_value *d;
703914ddf8SEdward Tomasz Napierala
713914ddf8SEdward Tomasz Napierala TAILQ_FOREACH(d, &defined_values, d_next) {
723914ddf8SEdward Tomasz Napierala if (strcmp(d->d_name, name) == 0)
733914ddf8SEdward Tomasz Napierala return (d->d_value);
743914ddf8SEdward Tomasz Napierala }
753914ddf8SEdward Tomasz Napierala
763914ddf8SEdward Tomasz Napierala return (NULL);
773914ddf8SEdward Tomasz Napierala }
783914ddf8SEdward Tomasz Napierala
793914ddf8SEdward Tomasz Napierala char *
defined_expand(const char * string)803914ddf8SEdward Tomasz Napierala defined_expand(const char *string)
813914ddf8SEdward Tomasz Napierala {
823914ddf8SEdward Tomasz Napierala const char *value;
833914ddf8SEdward Tomasz Napierala char c, *expanded, *name;
843914ddf8SEdward Tomasz Napierala int i, ret, before_len = 0, name_off = 0, name_len = 0, after_off = 0;
853914ddf8SEdward Tomasz Napierala bool backslashed = false, bracketed = false;
863914ddf8SEdward Tomasz Napierala
873914ddf8SEdward Tomasz Napierala expanded = checked_strdup(string);
883914ddf8SEdward Tomasz Napierala
893914ddf8SEdward Tomasz Napierala for (i = 0; string[i] != '\0'; i++) {
903914ddf8SEdward Tomasz Napierala c = string[i];
913914ddf8SEdward Tomasz Napierala if (c == '\\' && backslashed == false) {
923914ddf8SEdward Tomasz Napierala backslashed = true;
933914ddf8SEdward Tomasz Napierala continue;
943914ddf8SEdward Tomasz Napierala }
953914ddf8SEdward Tomasz Napierala if (backslashed) {
963914ddf8SEdward Tomasz Napierala backslashed = false;
973914ddf8SEdward Tomasz Napierala continue;
983914ddf8SEdward Tomasz Napierala }
993914ddf8SEdward Tomasz Napierala backslashed = false;
1003914ddf8SEdward Tomasz Napierala if (c != '$')
1013914ddf8SEdward Tomasz Napierala continue;
1023914ddf8SEdward Tomasz Napierala
1033914ddf8SEdward Tomasz Napierala /*
1043914ddf8SEdward Tomasz Napierala * The 'before_len' variable contains the number
1053914ddf8SEdward Tomasz Napierala * of characters before the '$'.
1063914ddf8SEdward Tomasz Napierala */
1073914ddf8SEdward Tomasz Napierala before_len = i;
1083914ddf8SEdward Tomasz Napierala assert(i + 1 < (int)strlen(string));
1093914ddf8SEdward Tomasz Napierala if (string[i + 1] == '{')
1103914ddf8SEdward Tomasz Napierala bracketed = true;
1113914ddf8SEdward Tomasz Napierala
1123914ddf8SEdward Tomasz Napierala if (string[i + 1] == '\0') {
1133914ddf8SEdward Tomasz Napierala log_warnx("truncated variable");
1143914ddf8SEdward Tomasz Napierala return (NULL);
1153914ddf8SEdward Tomasz Napierala }
1163914ddf8SEdward Tomasz Napierala
1173914ddf8SEdward Tomasz Napierala /*
1183914ddf8SEdward Tomasz Napierala * Skip '$'.
1193914ddf8SEdward Tomasz Napierala */
1203914ddf8SEdward Tomasz Napierala i++;
1213914ddf8SEdward Tomasz Napierala
1223914ddf8SEdward Tomasz Napierala if (bracketed) {
1233914ddf8SEdward Tomasz Napierala if (string[i + 1] == '\0') {
1243914ddf8SEdward Tomasz Napierala log_warnx("truncated variable");
1253914ddf8SEdward Tomasz Napierala return (NULL);
1263914ddf8SEdward Tomasz Napierala }
1273914ddf8SEdward Tomasz Napierala
1283914ddf8SEdward Tomasz Napierala /*
1293914ddf8SEdward Tomasz Napierala * Skip '{'.
1303914ddf8SEdward Tomasz Napierala */
1313914ddf8SEdward Tomasz Napierala i++;
1323914ddf8SEdward Tomasz Napierala }
1333914ddf8SEdward Tomasz Napierala
1343914ddf8SEdward Tomasz Napierala /*
1353914ddf8SEdward Tomasz Napierala * The 'name_off' variable contains the number
1363914ddf8SEdward Tomasz Napierala * of characters before the variable name,
1373914ddf8SEdward Tomasz Napierala * including the "$" or "${".
1383914ddf8SEdward Tomasz Napierala */
1393914ddf8SEdward Tomasz Napierala name_off = i;
1403914ddf8SEdward Tomasz Napierala
1413914ddf8SEdward Tomasz Napierala for (; string[i] != '\0'; i++) {
1423914ddf8SEdward Tomasz Napierala c = string[i];
1433914ddf8SEdward Tomasz Napierala /*
1443914ddf8SEdward Tomasz Napierala * XXX: Decide on the set of characters that can be
1453914ddf8SEdward Tomasz Napierala * used in a variable name.
1463914ddf8SEdward Tomasz Napierala */
1473914ddf8SEdward Tomasz Napierala if (isalnum(c) || c == '_')
1483914ddf8SEdward Tomasz Napierala continue;
1493914ddf8SEdward Tomasz Napierala
1503914ddf8SEdward Tomasz Napierala /*
1513914ddf8SEdward Tomasz Napierala * End of variable name.
1523914ddf8SEdward Tomasz Napierala */
1533914ddf8SEdward Tomasz Napierala if (bracketed) {
1543914ddf8SEdward Tomasz Napierala if (c != '}')
1553914ddf8SEdward Tomasz Napierala continue;
1563914ddf8SEdward Tomasz Napierala
1573914ddf8SEdward Tomasz Napierala /*
1583914ddf8SEdward Tomasz Napierala * The 'after_off' variable contains the number
1593914ddf8SEdward Tomasz Napierala * of characters before the rest of the string,
1603914ddf8SEdward Tomasz Napierala * i.e. after the variable name.
1613914ddf8SEdward Tomasz Napierala */
1623914ddf8SEdward Tomasz Napierala after_off = i + 1;
1633914ddf8SEdward Tomasz Napierala assert(i > 1);
1643914ddf8SEdward Tomasz Napierala assert(i - 1 > name_off);
1653914ddf8SEdward Tomasz Napierala name_len = i - name_off;
1663914ddf8SEdward Tomasz Napierala break;
1673914ddf8SEdward Tomasz Napierala }
1683914ddf8SEdward Tomasz Napierala
1693914ddf8SEdward Tomasz Napierala after_off = i;
1703914ddf8SEdward Tomasz Napierala assert(i > 1);
1713914ddf8SEdward Tomasz Napierala assert(i > name_off);
1723914ddf8SEdward Tomasz Napierala name_len = i - name_off;
1733914ddf8SEdward Tomasz Napierala break;
1743914ddf8SEdward Tomasz Napierala }
1753914ddf8SEdward Tomasz Napierala
1763914ddf8SEdward Tomasz Napierala name = strndup(string + name_off, name_len);
1773914ddf8SEdward Tomasz Napierala if (name == NULL)
1783914ddf8SEdward Tomasz Napierala log_err(1, "strndup");
1793914ddf8SEdward Tomasz Napierala value = defined_find(name);
1803914ddf8SEdward Tomasz Napierala if (value == NULL) {
1813914ddf8SEdward Tomasz Napierala log_warnx("undefined variable ${%s}", name);
1823914ddf8SEdward Tomasz Napierala return (NULL);
1833914ddf8SEdward Tomasz Napierala }
1843914ddf8SEdward Tomasz Napierala
1853914ddf8SEdward Tomasz Napierala /*
1863914ddf8SEdward Tomasz Napierala * Concatenate it back.
1873914ddf8SEdward Tomasz Napierala */
1883914ddf8SEdward Tomasz Napierala ret = asprintf(&expanded, "%.*s%s%s",
1893914ddf8SEdward Tomasz Napierala before_len, string, value, string + after_off);
1903914ddf8SEdward Tomasz Napierala if (ret < 0)
1913914ddf8SEdward Tomasz Napierala log_err(1, "asprintf");
1923914ddf8SEdward Tomasz Napierala
1933914ddf8SEdward Tomasz Napierala //log_debugx("\"%s\" expanded to \"%s\"", string, expanded);
1943914ddf8SEdward Tomasz Napierala free(name);
1953914ddf8SEdward Tomasz Napierala
1963914ddf8SEdward Tomasz Napierala /*
1973914ddf8SEdward Tomasz Napierala * Figure out where to start searching for next variable.
1983914ddf8SEdward Tomasz Napierala */
1993914ddf8SEdward Tomasz Napierala string = expanded;
2003914ddf8SEdward Tomasz Napierala i = before_len + strlen(value);
2013914ddf8SEdward Tomasz Napierala backslashed = bracketed = false;
2023914ddf8SEdward Tomasz Napierala before_len = name_off = name_len = after_off = 0;
2033914ddf8SEdward Tomasz Napierala assert(i <= (int)strlen(string));
2043914ddf8SEdward Tomasz Napierala }
2053914ddf8SEdward Tomasz Napierala
2063914ddf8SEdward Tomasz Napierala if (before_len != 0 || name_off != 0 || name_len != 0 || after_off != 0) {
2073914ddf8SEdward Tomasz Napierala log_warnx("truncated variable");
2083914ddf8SEdward Tomasz Napierala return (NULL);
2093914ddf8SEdward Tomasz Napierala }
2103914ddf8SEdward Tomasz Napierala
2113914ddf8SEdward Tomasz Napierala return (expanded);
2123914ddf8SEdward Tomasz Napierala }
2133914ddf8SEdward Tomasz Napierala
2143914ddf8SEdward Tomasz Napierala static void
defined_add(const char * name,const char * value)2153914ddf8SEdward Tomasz Napierala defined_add(const char *name, const char *value)
2163914ddf8SEdward Tomasz Napierala {
2173914ddf8SEdward Tomasz Napierala struct defined_value *d;
2183914ddf8SEdward Tomasz Napierala const char *found;
2193914ddf8SEdward Tomasz Napierala
2203914ddf8SEdward Tomasz Napierala found = defined_find(name);
2213914ddf8SEdward Tomasz Napierala if (found != NULL)
2223914ddf8SEdward Tomasz Napierala log_errx(1, "variable %s already defined", name);
2233914ddf8SEdward Tomasz Napierala
2243914ddf8SEdward Tomasz Napierala log_debugx("defining variable %s=%s", name, value);
2253914ddf8SEdward Tomasz Napierala
22627525377SEdward Tomasz Napierala d = calloc(1, sizeof(*d));
2273914ddf8SEdward Tomasz Napierala if (d == NULL)
2283914ddf8SEdward Tomasz Napierala log_err(1, "calloc");
2293914ddf8SEdward Tomasz Napierala d->d_name = checked_strdup(name);
2303914ddf8SEdward Tomasz Napierala d->d_value = checked_strdup(value);
2313914ddf8SEdward Tomasz Napierala
2323914ddf8SEdward Tomasz Napierala TAILQ_INSERT_TAIL(&defined_values, d, d_next);
2333914ddf8SEdward Tomasz Napierala }
2343914ddf8SEdward Tomasz Napierala
2353914ddf8SEdward Tomasz Napierala void
defined_parse_and_add(char * def)2363914ddf8SEdward Tomasz Napierala defined_parse_and_add(char *def)
2373914ddf8SEdward Tomasz Napierala {
2383914ddf8SEdward Tomasz Napierala char *name, *value;
2393914ddf8SEdward Tomasz Napierala
2403914ddf8SEdward Tomasz Napierala value = def;
2413914ddf8SEdward Tomasz Napierala name = strsep(&value, "=");
2423914ddf8SEdward Tomasz Napierala
2433914ddf8SEdward Tomasz Napierala if (value == NULL || value[0] == '\0')
2443914ddf8SEdward Tomasz Napierala log_errx(1, "missing variable value");
2453914ddf8SEdward Tomasz Napierala if (name == NULL || name[0] == '\0')
2463914ddf8SEdward Tomasz Napierala log_errx(1, "missing variable name");
2473914ddf8SEdward Tomasz Napierala
2483914ddf8SEdward Tomasz Napierala defined_add(name, value);
2493914ddf8SEdward Tomasz Napierala }
2503914ddf8SEdward Tomasz Napierala
2513914ddf8SEdward Tomasz Napierala void
defined_init(void)2523914ddf8SEdward Tomasz Napierala defined_init(void)
2533914ddf8SEdward Tomasz Napierala {
2543914ddf8SEdward Tomasz Napierala struct utsname name;
2553914ddf8SEdward Tomasz Napierala int error;
2563914ddf8SEdward Tomasz Napierala
2573914ddf8SEdward Tomasz Napierala TAILQ_INIT(&defined_values);
2583914ddf8SEdward Tomasz Napierala
2593914ddf8SEdward Tomasz Napierala error = uname(&name);
2603914ddf8SEdward Tomasz Napierala if (error != 0)
2613914ddf8SEdward Tomasz Napierala log_err(1, "uname");
2623914ddf8SEdward Tomasz Napierala
2633914ddf8SEdward Tomasz Napierala defined_add("ARCH", name.machine);
2643914ddf8SEdward Tomasz Napierala defined_add("CPU", name.machine);
265488ded91SChris Rees defined_add("DOLLAR", "$");
2663914ddf8SEdward Tomasz Napierala defined_add("HOST", name.nodename);
2673914ddf8SEdward Tomasz Napierala defined_add("OSNAME", name.sysname);
2683914ddf8SEdward Tomasz Napierala defined_add("OSREL", name.release);
2693914ddf8SEdward Tomasz Napierala defined_add("OSVERS", name.version);
2703914ddf8SEdward Tomasz Napierala }
271