Retro68/gcc/newlib/libc/sys/phoenix/getmntent.c
2017-10-07 02:16:47 +02:00

102 lines
2.9 KiB
C

/* Copyright (c) 2016 Phoenix Systems
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.
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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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 <errno.h>
#include <mntent.h>
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define COLUMN_FS_NAME 0
#define COLUMN_MOUNTPOINT 1
#define COLUMN_FS_TYPE 2
#define COLUMN_OPTS 3
#define COLUMN_DUMP_FREQ 4
#define COLUMN_PASSNO 5
#define BUFFER_SIZE 4096
struct mntent *getmntent_r(FILE *fp, struct mntent *result, char *buffer, int bufsize)
{
char *token, *buff_ptr;
char *line = NULL;
size_t size = 0;
int i;
buff_ptr = buffer;
if (getline(&line, &size, fp) == -1 || feof(fp)) {
free(line);
return NULL;
}
for (token = strtok(line, " "), i = 0; token != NULL; token = strtok(NULL, " "), ++i) {
if (((buff_ptr + strlen(token) + 1) - buffer) > bufsize) {
errno = ENOBUFS;
free(line);
return NULL;
}
switch (i) {
case COLUMN_FS_NAME:
result->mnt_fsname = strcpy(buff_ptr, token);
break;
case COLUMN_MOUNTPOINT:
result->mnt_dir = strcpy(buff_ptr, token);
break;
case COLUMN_FS_TYPE:
result->mnt_type = strcpy(buff_ptr, token);
break;
case COLUMN_OPTS:
result->mnt_opts = strcpy(buff_ptr, token);
break;
case COLUMN_DUMP_FREQ:
result->mnt_freq = atoi(token);
break;
case COLUMN_PASSNO:
result->mnt_passno = atoi(token);
break;
default:
free(line);
return NULL;
}
buff_ptr += strlen(token) + 1;
}
free(line);
return result;
}
struct mntent *getmntent(FILE *fp)
{
static struct mntent result;
static char buffer[BUFFER_SIZE];
memset(&result, 0, sizeof(struct mntent));
memset(buffer, 0, sizeof(buffer));
return getmntent_r(fp, &result, buffer, sizeof(buffer));
}