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41 * from: @(#)parseconf.c 8.1 (Berkeley) 6/4/93
43 * From: Utah Hdr: parseconf.c 3.1 92/07/06
44 * Author: Jeff Forys, University of Utah CSS
46 * @(#)parseconf.c 8.1 (Berkeley) 6/4/93
47 * $FreeBSD: src/libexec/rbootd/parseconf.c,v 1.9.2.1 2001/03/05 11:17:52 kris Exp $
48 * $DragonFly: src/libexec/rbootd/parseconf.c,v 1.2 2003/06/17 04:27:07 dillon Exp $
51 #include <sys/param.h>
66 ** ParseConfig -- parse the config file into linked list of clients.
72 ** 1 on success, 0 otherwise.
75 ** - Linked list of clients will be (re)allocated.
78 ** - GetBootFiles() must be called before this routine
79 ** to create a linked list of default boot files.
90 int omask, linecnt = 0;
92 if (BootAny) /* ignore config file */
95 FreeClients(); /* delete old list of clients */
97 if ((fp = fopen(ConfigFile, "r")) == NULL) {
98 syslog(LOG_ERR, "ParseConfig: can't open config file (%s)",
104 * We've got to block SIGHUP to prevent reconfiguration while
105 * dealing with the linked list of Clients. This can be done
106 * when actually linking the new client into the list, but
107 * this could have unexpected results if the server was HUP'd
108 * whilst reconfiguring. Hence, it is done here.
110 omask = sigblock(sigmask(SIGHUP));
113 * GETSTR positions `bcp' at the start of the current token,
114 * and null terminates it. `cp' is positioned at the start
115 * of the next token. spaces & commas are separators.
117 #define GETSTR while (isspace(*cp) || *cp == ',') cp++; \
119 while (*cp && *cp!=',' && !isspace(*cp)) cp++; \
120 if (*cp) *cp++ = '\0'
123 * For each line, parse it into a new CLIENT struct.
125 while (fgets(line, C_LINELEN, fp) != NULL) {
126 linecnt++; /* line counter */
128 if (*line == '\0' || *line == '#') /* ignore comment */
131 if ((cp = strchr(line,'#')) != NULL) /* trash comments */
134 cp = line; /* init `cp' */
135 GETSTR; /* get RMP addr */
136 if (bcp == cp) /* all delimiters */
140 * Get an RMP address from a string. Abort on failure.
142 if ((addr = ParseAddr(bcp)) == NULL) {
144 "ParseConfig: line %d: cant parse <%s>",
149 if ((client = NewClient(addr)) == NULL) /* alloc new client */
152 GETSTR; /* get first file */
155 * If no boot files are spec'd, use the default list.
156 * Otherwise, validate each file (`bcp') against the
157 * list of boot-able files.
160 if (bcp == cp) /* no files spec'd */
161 for (; i < C_MAXFILE && BootFiles[i] != NULL; i++)
162 client->files[i] = BootFiles[i];
166 * For each boot file spec'd, make sure it's
167 * in our list. If so, include a pointer to
168 * it in the CLIENT's list of boot files.
171 if (j==C_MAXFILE||BootFiles[j]==NULL) {
172 syslog(LOG_ERR, "ParseConfig: line %d: no boot file (%s)",
176 if (STREQN(BootFiles[j], bcp)) {
181 syslog(LOG_ERR, "ParseConfig: line %d: too many boot files (%s)",
186 GETSTR; /* get next file */
190 * Restricted list of boot files were spec'd,
191 * however, none of them were found. Since we
192 * apparently cant let them boot "just anything",
193 * the entire record is invalidated.
202 * Link this client into the linked list of clients.
203 * SIGHUP has already been blocked.
206 client->next = Clients;
210 (void) fclose(fp); /* close config file */
212 (void) sigsetmask(omask); /* reset signal mask */
214 return(1); /* return success */
218 ** ParseAddr -- Parse a string containing an RMP address.
220 ** This routine is fairly liberal at parsing an RMP address. The
221 ** address must contain 6 octets consisting of between 0 and 2 hex
222 ** chars (upper/lower case) separated by colons. If two colons are
223 ** together (e.g. "::", the octet between them is recorded as being
224 ** zero. Hence, the following addrs are all valid and parse to the
227 ** 08:00:09:00:66:ad 8::9:0:66:AD 8::9::66:aD
229 ** For clarity, an RMP address is really an Ethernet address, but
230 ** since the HP boot code uses IEEE 802.3, it's really an IEEE
231 ** 802.3 address. Of course, all of these are identical.
234 ** str - string representation of an RMP address.
237 ** pointer to a static array of RMP_ADDRLEN bytes.
243 ** - The return value points to a static buffer; it must
244 ** be copied if it's to be saved.
250 static u_int8_t addr[RMP_ADDRLEN];
255 memset((char *)&addr[0], 0, RMP_ADDRLEN); /* zero static buffer */
258 for (cp = str; *cp; cp++) {
260 * A colon (`:') must be used to delimit each octet.
263 if (++part == RMP_ADDRLEN) /* too many parts */
270 * Convert hex character to an integer.
275 i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10;
276 if (i < 10 || i > 15) /* not a hex char */
281 if (subpart > 2) /* too many hex chars */
288 if (part != (RMP_ADDRLEN-1)) /* too few parts */
295 ** GetBootFiles -- record list of files in current (boot) directory.
301 ** Number of boot files on success, 0 on failure.
304 ** Strings in `BootFiles' are freed/allocated.
307 ** - After this routine is called, ParseConfig() must be
308 ** called to re-order it's list of boot file pointers.
319 * Free the current list of boot files.
321 for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) {
322 FreeStr(BootFiles[i]);
327 * Open current directory to read boot file names.
329 if ((dfd = opendir(".")) == NULL) { /* open BootDir */
330 syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n",
336 * Read each boot file name and allocate space for it in the
337 * list of boot files (BootFiles). All boot files read after
338 * C_MAXFILE will be ignored.
341 for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) {
342 if (stat(dp->d_name, &statb) < 0 ||
343 (statb.st_mode & S_IFMT) != S_IFREG)
347 "GetBootFiles: too many boot files (%s ignored)",
349 else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL)
353 (void) closedir(dfd); /* close BootDir */
355 if (i == 0) /* cant find any boot files */
356 syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir);