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/* $OpenBSD: tcfs_getfspath.c,v 1.7 2000/06/20 10:46:51 fgsch Exp $ */
/*
* Transparent Cryptographic File System (TCFS) for NetBSD
* Author and mantainer: Luigi Catuogno [luicat@tcfs.unisa.it]
*
* references: http://tcfs.dia.unisa.it
* tcfs-bsd@tcfs.unisa.it
*/
/*
* Base utility set v0.1
*/
#include <fstab.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <miscfs/tcfs/tcfs.h>
#include "tcfslib.h"
#define WHITESPACE " \t\r\n"
int
tcfs_label_getcipher(char *label)
{
int ciphernum;
if (tcfs_get_label(label, NULL, &ciphernum))
return (ciphernum);
return (-1);
}
int
tcfs_getfspath(char *label2search, char *path)
{
return (tcfs_get_label(label2search, path, NULL));
}
int
tcfs_get_label(char *label2search, char *path, int *ciphernumber)
{
FILE *fp;
char *label, *line, *p, *tag, *mountpoint, *cipherfield;
int found = 0;
if ((fp = fopen(_PATH_FSTAB, "r")) == NULL)
return (0);
if ((line = (char *)malloc(1024)) == NULL)
goto out;
while (!feof(fp) && !found) {
p = line;
fgets(p, 1024, fp);
p = p + strspn(p, WHITESPACE);
while (!found) {
strsep(&p, WHITESPACE); /* device */
if (p == NULL)
break;
p = p + strspn(p, WHITESPACE);
mountpoint = strsep(&p, WHITESPACE); /* mount point */
if (p == NULL)
break;
tag = strsep(&p, WHITESPACE); /* file system */
if (p == NULL || strcmp(tag, "tcfs"))
break;
/* find the correct label */
label = strstr(p, "label=");
cipherfield = strstr(p, "cipher=");
if (label == NULL)
break;
p = label + 6;
label = strsep(&p, WHITESPACE ",");
if (!strlen(label) || strcmp(label, label2search))
break;
if (path) {
strcpy(path, mountpoint);
found = 1;
}
if (ciphernumber) {
if (cipherfield == NULL)
break;
p = cipherfield + 7;
cipherfield = strsep(&p, WHITESPACE ",");
if (!strlen(cipherfield))
break;
*ciphernumber = strtol(cipherfield, &p, 0);
if (cipherfield != p)
found = 1;
}
}
}
free(line);
out:
fclose(fp);
return (found);
}
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