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