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/*
* KON2 - Kanji ON Console -
* Copyright (C) 1992-1996 Takashi MANABE (manabe@papilio.tutics.tut.ac.jp)
*
* 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.
* 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 TAKASHI MANABE ``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 TERRENCE R. LAMBERT 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, 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 <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <getcap.h>
#define BUF_SIZE 1024
#define MAX_CAPS 20
static struct capability {
char *name; /* Name of capability label */
initializer *func; /* Function to perform configuration */
int initialized; /* 1 if initialized */
char *arg; /* Command line argument for this capability. */
char *def_value; /* Default value. NULL means required entry. */
} cap[MAX_CAPS];
static struct capability *FindCap(const char *name)
{
int i;
struct capability *cp;
for (i = 0, cp = cap; i < MAX_CAPS; i++, cp++) {
if ((cp->name != NULL) && (strcasecmp(name, cp->name) == 0)) {
return cp;
}
}
return NULL;
}
/* Define initializer function func for capability name. If def_value is nil,
then the entry of the name must exist in configuration file. An error is
flagged if no entry is found. If def_value is non-nil and no entry is found
in configuration file, then func is invoked with def_value. */
void DefineCap(const char *name, initializer *func, const char *def_value)
{
int i;
struct capability *cp;
/* Pass 1 -- try to replace same name entry if exists. */
if ((cp = FindCap(name)) != NULL) {
#ifdef DEBUG
fprintf(stderr, "cap %s redefined (default %s)\r\n", name,
def_value ? def_value : "None");
#endif
cp->name = strdup(name);
cp->func = func;
if (def_value)
cp->def_value = strdup(def_value);
return;
}
/* Pass 2 -- fine empty slot and insert new entry. */
for (i = 0, cp = cap; i < MAX_CAPS; i++, cp++) {
if (cp->name == NULL) {
#ifdef DEBUG
fprintf(stderr, "cap %s defined (default %s)\r\n", name,
def_value ? def_value : "None");
#endif
cp->name = strdup(name);
cp->func = func;
if (def_value)
cp->def_value = strdup(def_value);
return;
}
}
fprintf(stderr, "Fatal: internal error - can't find room for capability `%s'\r\r\n", name);
abort();
}
/* Delete all initializer functions. */
void CapInit(void)
{
struct capability *cp;
int i;
for (i = 0, cp = cap; i < MAX_CAPS; i++, cp++) {
#ifdef DEBUG
if (cp->name)
fprintf(stderr, "cap %s deleted\r\n", cp->name);
#endif
cp->initialized = 0;
if (cp->name)
free(cp->name);
if (cp->arg)
free(cp->arg);
if (cp->def_value)
free(cp->def_value);
cp->name = cp->arg = cp->def_value = NULL;
}
}
static const char label_delim[] = ":,; \t\n";
/* Read configuration file named filename and invoke initializer function for each entry. */
int ReadConfig(const char *filename)
{
FILE *capFp;
char line[MAX_COLS], *p;
char buf[BUF_SIZE];
struct capability *c;
int i;
int errors = 0; /* number of errors during configuration */
if ((capFp = fopen(filename, "r")) == NULL) {
fprintf(stderr, "Error: can't open config file\r\r\n");
perror(filename);
return FAILURE;
}
while(fgets(line, MAX_COLS, capFp) != NULL) {
nextLabel:
if ((p = strchr(line, '#')) != NULL)
*p = '\0';
if (strchr(line, ':') == NULL) continue; /* not a lebel */
for (p = strtok(line, label_delim); p != NULL; p = strtok(NULL, label_delim)) {
/* Process one label line. */
if ((c = FindCap(p)) != NULL) {
/* Found matching capability. Get body from file. */
char *l = buf;
while (fgets(line, MAX_COLS, capFp) != NULL
&& line[0] == '\t') {
char *l2 = line;
while (*l2 != '\n' && *l2 != '#') {
*l++ = *l2++;
}
*l++ = '\n';
}
*l = '\0';
if (! c->initialized) {
/* do initialize */
if (c->arg) {
#ifdef DEBUG
fprintf(stderr, "Capability %s set to arg %s\r\n",
c->name, c->arg);
#endif
if (c->func(c->arg) < 0)
errors++;
} else {
#ifdef DEBUG
fprintf(stderr, "Capability %s set to %s",
c->name, buf);
#endif
if (c->func(buf) < 0)
errors++;
}
c->initialized = 1;
}
goto nextLabel; /* next line already read */
}
}
}
/* Default initialization for unspecified capability. */
for (i = 0, c = cap; i < MAX_CAPS; i++, c++) {
if ((c->name != NULL) && !c->initialized) {
if (c->arg) {
#ifdef DEBUG
fprintf(stderr, "Capability %s defaults to arg %s\r\n", c->name, c->arg);
#endif
if (c->func(c->arg) < 0)
errors++;
} else if (c->def_value) {
#ifdef DEBUG
fprintf(stderr, "Capability %s defaults to %s\r\n", c->name, c->def_value);
#endif
if (c->func(c->def_value) < 0)
errors++;
} else {
fprintf(stderr, "Error: entry for capability `%s' not found\r\r\n", c->name);
errors++;
}
}
}
fclose(capFp);
#ifdef DEBUG
fprintf(stderr, "Finished reading config file\r\n");
#endif
if (errors)
return FAILURE;
else
return SUCCESS;
}
/* Set value for capability capName. */
int SetCapArg(const char *capName, const char *value)
{
struct capability *cp;
if ((cp = FindCap(capName)) == NULL) {
return FAILURE;
}
if (cp->def_value == NULL) {
/* Protected capability. */
return FAILURE;
}
cp->arg = strdup(value);
#ifdef DEBUG
fprintf(stderr, "Setting arg for %s to %s\r\n", capName, value);
#endif
return SUCCESS;
}
/* Utility function that return 1 if confstr is "On" and 0 if "OFF". */
bool BoolConf(const char *confstr)
{
char name[MAX_COLS];
sscanf(confstr, "%s", name);
if (strcasecmp(name, "On") == 0 ||
strcasecmp(name, "True") == 0) {
return TRUE;
} else if (strcasecmp(name, "Off") != 0 &&
strcasecmp(name, "False") != 0) {
fprintf(stderr, "Warning: value `%s' unrecognized as boolean; assuming `Off'\r\r\n",
name);
}
return FALSE;
}
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