/* $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); }