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/*
* Copyright (C) 2023 Patrick McDermott
*
* This file is part of opkg-opk.
*
* opkg-opk is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* opkg-opk is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with opkg-opk. If not, see <https://www.gnu.org/licenses/>.
*/
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "defs.h"
#include "specials.h"
struct opkg_opk_specials {
char type;
uint32_t devmajor;
uint32_t devminor;
char *name;
struct opkg_opk_specials *next;
};
static int
_opkg_opk_specials_read_v1(FILE *fp, struct opkg_opk_specials **specials)
{
struct opkg_opk_specials *special;
*specials = NULL;
fscanf(fp, "%*[^\n]\n"); /* Header line */
while (feof(fp) == 0) {
special = malloc(sizeof(*special));
if (special == NULL) {
opkg_opk_specials_free(*specials);
return OPKG_OPK_ERROR;
}
/* POSIX specifies the assignment-allocation character 'm', but ISO
* C doesn't, so GCC prints a warning. */
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wformat"
if (fscanf(fp, " %c %" SCNu32 " %" SCNu32 " %ms \n",
&special->type,
&special->devmajor, &special->devminor,
&special->name) != 4) {
# pragma GCC diagnostic pop
opkg_opk_specials_free(*specials);
return OPKG_OPK_ERROR;
}
if (special->type != 'c' && special->type != 'b') {
opkg_opk_specials_free(*specials);
return OPKG_OPK_ERROR;
}
special->next = *specials;
*specials = special;
}
return OPKG_OPK_OK;
}
int
opkg_opk_specials_read(const char *file_name,
struct opkg_opk_specials **specials)
{
FILE *fp;
unsigned int version;
fp = fopen(file_name, "r");
if (fp == NULL) {
return OPKG_OPK_ERROR;
}
if (fscanf(fp, " version = %u \n", &version) != 1) {
fclose(fp);
return OPKG_OPK_ERROR;
}
switch (version) {
case 1U:
if (_opkg_opk_specials_read_v1(fp, specials) !=
OPKG_OPK_OK) {
fclose(fp);
return OPKG_OPK_ERROR;
}
break;
default:
fclose(fp);
return OPKG_OPK_ERROR;
}
fclose(fp); /* Just reading, so OK to ignore errors */
return OPKG_OPK_OK;
}
int
opkg_opk_specials_find(struct opkg_opk_specials *specials, const char *find,
char *type, uint32_t *devmajor, uint32_t *devminor)
{
for (; specials != NULL; specials = specials->next) {
if (strcmp(find, specials->name) == 0) {
*type = specials->type;
*devmajor = specials->devmajor;
*devminor = specials->devminor;
return OPKG_OPK_OK;
}
}
return OPKG_OPK_END;
}
void
opkg_opk_specials_free(struct opkg_opk_specials *specials)
{
struct opkg_opk_specials *special;
while (specials != NULL) {
special = specials;
specials = specials->next;
free(special->name);
free(special);
}
}
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