/*
* The new sysinstall program.
*
* This is probably the last attempt in the `sysinstall' line, the next
* generation being slated to essentially a complete rewrite.
*
* $Id: attr.c,v 1.8.2.8 1997/03/28 23:07:09 jkh Exp $
*
* Copyright (c) 1995
* Jordan Hubbard. All rights reserved.
* Copyright (c) 1995
* Gary J Palmer. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* verbatim and that no modifications are made prior to this
* point in the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR THEIR PETS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "sysinstall.h"
#include <ctype.h>
#include <sys/errno.h>
int
attr_parse_file(Attribs *attr, char *file)
{
int status;
FILE *fp;
if ((fp = fopen(file, "r")) == NULL) {
msgConfirm("Cannot open the information file `%s': %s (%d)", file, strerror(errno), errno);
return DITEM_FAILURE;
}
status = attr_parse(attr, fp);
fclose(fp);
return status;
}
int
attr_parse(Attribs *attr, FILE *fp)
{
char hold_n[MAX_NAME+1];
char hold_v[MAX_VALUE+1];
char buf[BUFSIZ];
int bp, n, v, max;
enum { LOOK, COMMENT, NAME, VALUE, MVALUE, COMMIT, FILL, STOP } state;
int num_attribs;
int ch = 0;
n = v = num_attribs = bp = max = 0;
state = LOOK;
while (state != STOP) {
if (state != COMMIT) {
if (bp == max)
state = FILL;
else
ch = buf[bp++];
}
switch(state) {
case FILL:
if ((max = fread(buf, 1, sizeof buf, fp)) <= 0) {
state = STOP;
break;
}
else {
state = LOOK;
if (isDebug())
msgDebug("Read %d characters from attributes file on state FILL\n", max);
ch = buf[0];
bp = 1;
}
/* Fall through deliberately since we already have a character and state == LOOK */
case LOOK:
if (isspace(ch))
continue;
/* Allow shell or lisp style comments */
else if (ch == '#' || ch == ';') {
state = COMMENT;
continue;
}
else if (isalpha(ch) || ch == '_') {
if (n >= MAX_NAME) {
msgDebug("Attribute name overflow at character %d, ignoring entry..\n", n);
n = 0;
state = COMMENT;
}
else {
hold_n[n++] = ch;
state = NAME;
}
}
else {
msgDebug("Parse config: Invalid character '%c (%0x)'\n", ch, ch);
state = COMMENT; /* Ignore the rest of the line */
}
break;
case COMMENT:
if (ch == '\n')
state = LOOK;
break;
case NAME:
if (ch == '\n' || !ch) {
hold_n[n] = '\0';
hold_v[0] = '\0';
v = n = 0;
state = COMMIT;
}
else if (isspace(ch))
continue;
else if (ch == '=') {
hold_n[n] = '\0';
v = n = 0;
state = VALUE;
}
else
hold_n[n++] = ch;
break;
case VALUE:
if (v == 0 && isspace(ch))
continue;
else if (ch == '{')
state = MVALUE;
else if (ch == '\n' || !ch) {
hold_v[v] = '\0';
v = n = 0;
state = COMMIT;
}
else {
if (v >= MAX_VALUE) {
msgDebug("Value length overflow at character %d\n", v);
state = COMMENT;
v = n = 0;
break;
}
else
hold_v[v++] = ch;
}
break;
case MVALUE:
/* multiline value */
if (v >= MAX_VALUE) {
msgDebug("Value length overflow at character %d\n", v);
state = COMMENT;
n = v = 0;
}
else if (ch == '}') {
hold_v[v] = '\0';
v = n = 0;
state = COMMIT;
}
else
hold_v[v++] = ch;
break;
case COMMIT:
SAFE_STRCPY(attr[num_attribs].name, hold_n);
SAFE_STRCPY(attr[num_attribs].value, hold_v);
state = LOOK;
v = n = 0;
if (++num_attribs >= MAX_ATTRIBS) {
msgDebug("Attribute limit overflow at %d; encountered a bad attributes file!\n", num_attribs);
return DITEM_FAILURE;
}
break;
default:
msgFatal("Unknown state in attr_parse??");
}
}
attr[num_attribs].name[0] = NULL; /* end marker */
attr[num_attribs].value[0] = NULL; /* end marker */
if (isDebug())
msgDebug("Finished parsing %d attributes.\n", num_attribs);
return DITEM_SUCCESS;
}
char *
attr_match(Attribs *attr, char *name)
{
int n;
if (isDebug())
msgDebug("Trying to match attribute `%s'\n", name);
for (n = 0; attr[n].name[0] && strcasecmp(attr[n].name, name); n++);
if (attr[n].name[0]) {
if (isDebug())
msgDebug("Returning `%s'\n", attr[n].value);
return(attr[n].value);
}
return NULL;
}
