mirror of
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606b60ca2f
to be scrapped, ultimately, and it will be.
219 lines
5.4 KiB
C
219 lines
5.4 KiB
C
/*
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* The new sysinstall program.
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*
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* This is probably the last attempt in the `sysinstall' line, the next
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* generation being slated to essentially a complete rewrite.
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*
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* $Id: attr.c,v 1.17 1997/04/02 12:07:21 jkh Exp $
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*
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* Copyright (c) 1995
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* Jordan Hubbard. All rights reserved.
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* Copyright (c) 1995
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* Gary J Palmer. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* verbatim and that no modifications are made prior to this
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* point in the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR THEIR PETS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "sysinstall.h"
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#include <ctype.h>
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#include <sys/errno.h>
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int
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attr_parse_file(Attribs *attr, char *file)
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{
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int status;
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FILE *fp;
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if ((fp = fopen(file, "r")) == NULL) {
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msgConfirm("Cannot open the information file `%s': %s (%d)", file, strerror(errno), errno);
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return DITEM_FAILURE;
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}
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status = attr_parse(attr, fp);
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fclose(fp);
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return status;
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}
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int
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attr_parse(Attribs *attr, FILE *fp)
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{
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char hold_n[MAX_NAME+1];
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char hold_v[MAX_VALUE+1];
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char buf[BUFSIZ * 4];
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int bp, n, v, max;
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enum { LOOK, COMMENT, NAME, VALUE, MVALUE, COMMIT, FILL, STOP } state;
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int num_attribs;
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int ch = 0;
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n = v = num_attribs = bp = max = 0;
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state = LOOK;
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while (state != STOP) {
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if (state != COMMIT) {
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if (bp == max)
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state = FILL;
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else
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ch = buf[bp++];
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}
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switch(state) {
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case FILL:
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if ((max = fread(buf, 1, sizeof buf, fp)) <= 0) {
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state = STOP;
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break;
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}
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else {
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state = LOOK;
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if (isDebug())
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msgDebug("Read %d characters from attributes file on state FILL\n", max);
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ch = buf[0];
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bp = 1;
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}
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/* Fall through deliberately since we already have a character and state == LOOK */
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case LOOK:
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if (isspace(ch))
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continue;
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/* Allow shell or lisp style comments */
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else if (ch == '#' || ch == ';') {
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state = COMMENT;
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continue;
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}
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else if (isalnum(ch) || ch == '_') {
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if (n >= MAX_NAME) {
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msgDebug("Attribute name overflow at character %d, ignoring entry..\n", n);
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n = 0;
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state = COMMENT;
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}
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else {
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hold_n[n++] = ch;
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state = NAME;
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}
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}
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else {
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msgDebug("Parse config: Invalid character '%c (%0x)'\n", ch, ch);
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state = COMMENT; /* Ignore the rest of the line */
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}
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break;
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case COMMENT:
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if (ch == '\n')
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state = LOOK;
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break;
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case NAME:
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if (ch == '\n' || !ch) {
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hold_n[n] = '\0';
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hold_v[0] = '\0';
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v = n = 0;
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state = COMMIT;
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}
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else if (isspace(ch))
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continue;
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else if (ch == '=') {
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hold_n[n] = '\0';
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v = n = 0;
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state = VALUE;
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}
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else
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hold_n[n++] = ch;
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break;
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case VALUE:
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if (v == 0 && isspace(ch))
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continue;
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else if (ch == '{')
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state = MVALUE;
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else if (ch == '\n' || !ch) {
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hold_v[v] = '\0';
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v = n = 0;
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state = COMMIT;
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}
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else {
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if (v >= MAX_VALUE) {
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msgDebug("Value length overflow at character %d\n", v);
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state = COMMENT;
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v = n = 0;
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break;
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}
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else
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hold_v[v++] = ch;
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}
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break;
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case MVALUE:
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/* multiline value */
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if (v >= MAX_VALUE) {
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msgDebug("Value length overflow at character %d\n", v);
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state = COMMENT;
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n = v = 0;
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}
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else if (ch == '}') {
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hold_v[v] = '\0';
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v = n = 0;
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state = COMMIT;
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}
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else
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hold_v[v++] = ch;
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break;
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case COMMIT:
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SAFE_STRCPY(attr[num_attribs].name, hold_n);
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SAFE_STRCPY(attr[num_attribs].value, hold_v);
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state = LOOK;
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v = n = 0;
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if (++num_attribs >= MAX_ATTRIBS) {
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msgDebug("Attribute limit overflow at %d; encountered a bad attributes file!\n", num_attribs);
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return DITEM_FAILURE;
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}
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break;
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default:
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msgFatal("Unknown state in attr_parse??");
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}
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}
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attr[num_attribs].name[0] = NULL; /* end marker */
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attr[num_attribs].value[0] = NULL; /* end marker */
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if (isDebug())
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msgDebug("Finished parsing %d attributes.\n", num_attribs);
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return DITEM_SUCCESS;
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}
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char *
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attr_match(Attribs *attr, char *name)
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{
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int n;
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if (isDebug())
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msgDebug("Trying to match attribute `%s'\n", name);
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for (n = 0; attr[n].name[0] && strcasecmp(attr[n].name, name); n++);
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if (attr[n].name[0]) {
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if (isDebug())
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msgDebug("Returning `%s'\n", attr[n].value);
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return(attr[n].value);
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}
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return NULL;
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}
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