+++ /dev/null
-/*
- * $Id: parse_mtab.c,v 1.7 2001-12-15 06:25:44 jmarcus Exp $
- *
- * afpd_mtab_parse & support. -- rgr, 9-Apr-01.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif /* HAVE_CONFIG_H */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-
-/* STDC check */
-#if STDC_HEADERS
-#include <string.h>
-#else /* STDC_HEADERS */
-#ifndef HAVE_STRCHR
-#define strchr index
-#define strrchr index
-#endif /* HAVE_STRCHR */
-char *strchr (), *strrchr ();
-#ifndef HAVE_MEMCPY
-#define memcpy(d,s,n) bcopy ((s), (d), (n))
-#define memmove(d,s,n) bcopy ((s), (d), (n))
-#endif /* ! HAVE_MEMCPY */
-#endif /* STDC_HEADERS */
-
-#include <sys/stat.h>
-
-#include "directory.h"
-#include "parse_mtab.h"
-
-#define MAX_AFPD_MTAB_ENTRIES 256 /* unreasonably large number */
-#define MTAB_DELIM_CHARS " \t\n" /* delimiters for parsing */
-
-#ifndef COPY_STRING
-#define COPY_STRING(lval, str) \
- (lval) = malloc(1+strlen(str)), strcpy((lval), (str))
-#endif /* COPY_STRING */
-
-/* global mount table; afpd_st_cnid uses this to lookup the right entry. */
-static struct afpd_mount_table *afpd_mount_table;
-
-static int
-ceil_log_2 __P((int n))
-/* Return the number of bits required to represent n. Only works for
-positive n. */
-{
- int n_bits = 0;
-
- while (n) {
- n >>= 1;
- n_bits += 1;
- }
- return(n_bits);
-}
-
-unsigned int
-afpd_st_cnid __P((struct stat *st))
-/* Given a stat structure, look up the device in afpd_mount_table, and
- compute and return a CNID. */
-{
- int id;
- struct afpd_mtab_entry *entry;
-
- if (afpd_mount_table != NULL) {
- for (id = 0; id < afpd_mount_table->size; id++) {
- entry = afpd_mount_table->table[id];
- if (entry != NULL
- && entry->dev_major == major(st->st_dev)
- && entry->dev_minor == minor(st->st_dev)) {
- return(entry->bit_value | st->st_ino);
- }
- }
- }
-
- /* Fallback. */
- return(st->st_ino);
-}
-
-struct afpd_mount_table *
- afpd_mtab_parse __P((char *file_name))
- /* Parse the given mtab file, returning a new afpd_mount_table structure.
- Also saves it in the afpd_mount_table static variable for use by the
- afpd_st_cnid function. Returns NULL if it encounters an error.
-
- [It would be great if this could generate a warning for any device that
- allows more inodes than we can allocate bits for. -- rgr, 9-Apr-01.]
- */
-{
- struct afpd_mtab_entry *entries[MAX_AFPD_MTAB_ENTRIES]; /* temp */
- int id, max_id = 0, n_errors = 0;
- struct stat st;
- char line[1000], *p, *index_tok, *dev_tok, *mount_tok;
- int line_number = 0; /* one-based */
- FILE *f = fopen(file_name, "r");
-
- if (f == NULL) {
- fprintf(stderr, "Error: Can't open %s: code %d\n",
- file_name, errno);
- return(NULL);
- }
- for (id = 0; id < MAX_AFPD_MTAB_ENTRIES; id++)
- entries[id] = NULL;
- while (fgets(line, sizeof(line), f) != NULL) {
- line_number++;
- /* flush comment */
- if ((p = strchr(line, '#')) != NULL)
- *p = '\0';
- /* get fields */
- index_tok = strtok(line, MTAB_DELIM_CHARS);
- dev_tok = strtok(NULL, MTAB_DELIM_CHARS);
- mount_tok = strtok(NULL, MTAB_DELIM_CHARS);
- if (mount_tok == NULL) {
- /* [warning here if index_tok nonempty? -- rgr, 9-Apr-01.] */
- }
- else if (id = strtol(index_tok, &p, 10),
- *p != '\0') {
- fprintf(stderr, "afpd:%s:%d: Non-integer device index value '%s'.\n",
- file_name, line_number, index_tok);
- n_errors++;
- }
- else if (id < 1 || id > MAX_AFPD_MTAB_ENTRIES) {
- fprintf(stderr,
- "afpd:%s:%d: Expected an integer from 1 to %d, but got '%s'.\n",
- file_name, line_number, MAX_AFPD_MTAB_ENTRIES-1, index_tok);
- n_errors++;
- }
- else if (entries[id] != NULL) {
- /* not unique. */
- fprintf(stderr,
- "afpd:%s:%d: Id %d is already taken for %s.\n",
- file_name, line_number, id, entries[id]->device);
- n_errors++;
- }
- else if (stat(dev_tok, &st) != 0) {
- fprintf(stderr, "afpd:%s:%d: Can't stat '%s': code %d\n",
- file_name, line_number, dev_tok, errno);
- n_errors++;
- }
- else if (! S_ISBLK(st.st_mode)) {
- fprintf(stderr, "afpd:%s:%d: '%s' is not a block device.\n",
- file_name, line_number, dev_tok);
- n_errors++;
- }
- else {
- /* make a new entry */
- struct afpd_mtab_entry *entry
- = (struct afpd_mtab_entry *) malloc(sizeof(struct afpd_mtab_entry));
-
- entry->id = id;
- entry->dev_major = major(st.st_rdev);
- entry->dev_minor = minor(st.st_rdev);
- COPY_STRING(entry->device, dev_tok);
- COPY_STRING(entry->mount_point, mount_tok);
- entries[id] = entry;
- if (id > max_id)
- max_id = id;
- }
- } /* next line */
-
- fclose(f);
-if (n_errors) {
- fprintf(stderr, "Got %d errors while reading %s; exiting.\n",
- n_errors, file_name);
- return(NULL);
- }
- else {
- /* make the table. */
- struct afpd_mount_table *mount_table /* return value */
- = (struct afpd_mount_table *) malloc(sizeof(struct afpd_mount_table));
- int n_bits = ceil_log_2(max_id);
- int table_size;
- struct afpd_mtab_entry **new_entries;
-
- if (n_bits < AFPD_MTAB_MIN_DEV_BITS)
- n_bits = AFPD_MTAB_MIN_DEV_BITS;
- table_size = 1 << n_bits;
- new_entries = (struct afpd_mtab_entry **)
- malloc(table_size*sizeof(struct afpd_mtab_entry *));
- mount_table->size = table_size;
- mount_table->bits = n_bits;
- mount_table->shift = AFPD_MTAB_DEV_AND_INODE_BITS-n_bits;
-for (id = 0; id < table_size; id++) {
- if (entries[id] != NULL)
- entries[id]->bit_value = entries[id]->id << mount_table->shift;
- new_entries[id] = entries[id];
- }
- mount_table->table = new_entries;
-
- afpd_mount_table = mount_table;
- return(mount_table);
- }
-}
+++ /dev/null
-/*
- * $Id: parse_mtab.h,v 1.5 2001-12-10 20:16:54 srittau Exp $
- *
- * header for afpd_mtab_parse, afpd_st_cnid
- */
-
-#ifndef _parse_mtab_h
-#define _parse_mtab_h
-
-/* set this to 31 to reserve the high-order bit for distinguishing files and
- directories. */
-#define AFPD_MTAB_DEV_AND_INODE_BITS 32
-/* this gives us some stability when adding partitions. */
-#define AFPD_MTAB_MIN_DEV_BITS 3
-
-struct afpd_mtab_entry {
- /* Description of one partition. */
- int id; /* unique index (a small integer) */
- int dev_major, dev_minor; /* device numbers */
- int bit_value; /* preshifted device index field */
- char *device; /* device name string (for debugging) */
- char *mount_point; /* mounted directory (for debugging) */
-};
-
-struct afpd_mount_table {
- /* Description of all partitions. */
- int size; /* length of entries array, a power of 2 */
- int bits; /* number of bits, log2(size) */
- unsigned int shift; /* amount by which to shift into CNID device field */
- struct afpd_mtab_entry **table; /* index -> entry map vector, some
- entries may be null */
-};
-
-extern
- unsigned int
- afpd_st_cnid __P((struct stat *st));
-
-extern
- struct afpd_mount_table *
- afpd_mtab_parse __P((char *file_name));
-
-#endif /* not _parse_mtab_h */
+++ /dev/null
-/*
- * $Id: test_parse_mtab.c,v 1.4 2001-12-03 05:03:38 jmarcus Exp $
- * test driver for the afpd_mtab_parse fn. -- rgr, 9-Apr-01.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif /* HAVE_CONFIG_H */
-
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif /* HAVE_SYS_STAT_H */
-
-#include "directory.h"
-#include "parse_mtab.h"
-
-/* hack. etc/afpd/directory.h would need to be patched accordingly. this
- version ignores the filep stuff. based on the comment starting around
- line 200 in etc/afpd/file.c (search for "fucking mess"), this may be OK.
- */
-#ifdef CNID
-#undef CNID
-#endif /* ! CNID */
-
-/* keep-filep version. must also decrement AFPD_MTAB_DEV_AND_INODE_BITS. */
-/* #define CNID(pst, filep) (afpd_st_cnid(pst) | CNID_FILE(filep)) */
-#define CNID(pst, filep) (afpd_st_cnid(pst))
-
-int
-main(int argc, char **argv)
-{
- char *file_name = "afpd.mtab";
- struct afpd_mount_table *table = NULL;
- int arg = 1;
-
- if (argc >= 3 && strcmp(argv[1], "-f") == 0) {
- file_name = argv[2];
- arg += 2;
- }
- if (arg < argc && argv[arg][0] == '-') {
- /* either they don't understand, or they must be asking for help anyway. */
- fprintf(stderr, "Usage: %s [-f file-name] [file . . . ]\n",
- argv[0]);
- exit(1);
- }
- table = afpd_mtab_parse(file_name);
- if (table != NULL) {
- struct stat st;
- int id, count = 0;
-
- fprintf(stderr, "File %s: Field width %d, shift %d.\n",
- file_name, table->bits, table->shift);
- for (id = 0; id < table->size; id++) {
- struct afpd_mtab_entry *entry = table->table[id];
-
- if (entry != NULL) {
- fprintf(stderr, " Id %d -> device %s (%d,%d) on %s -> bits 0x%08x.\n",
- id, entry->device, entry->dev_major, entry->dev_minor,
- entry->mount_point, entry->bit_value);
- count++;
- }
- }
- fprintf(stderr, "%d entries used out of a maximum of %d (1..%d).\n",
- count, table->size-1, table->size-1);
- for (; arg < argc; arg++) {
- if (lstat(argv[arg], &st) != 0) {
- fprintf(stderr, "Can't lstat '%s': code %d\n",
- argv[arg], errno);
- }
- else {
- fprintf(stderr, "File %s, device (%d,%d), inode %ld, CNID 0x%08x.\n",
- argv[arg], major(st.st_dev), minor(st.st_dev), st.st_ino,
- CNID(&st, S_ISDIR(st.st_mode) ? 1 : 0));
- }
- }
- }
- return(0);
-}
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