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Just to demonstrate namemod a bit further, make this flip the case

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of filenames / contents instead of rot13 if -f is given.
This commit is contained in:
pooka 2007-06-24 18:59:27 +00:00
parent 39542808a8
commit 3aa77bc919
1 changed files with 29 additions and 6 deletions
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35
share/examples/puffs/rot13fs/rot13fs.c
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@ -1,4 +1,4 @@
/* $NetBSD: rot13fs.c,v 1.10 2007/06/24 18:43:30 pooka Exp $ */
/* $NetBSD: rot13fs.c,v 1.11 2007/06/24 18:59:27 pooka Exp $ */
/*
* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
@ -28,8 +28,13 @@
/*
* rot13fs: puffs layering experiment
* (unfinished, as is probably fairly easy to tell)
*
* This also demonstrates how namemod can be easily set to any
* function which reverses itself (argument -f provides a case-flipping
* file system).
*/
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <puffs.h>
@ -49,6 +54,8 @@ usage()
getprogname());
}
static void (*flipflop)(void *, size_t);
static uint8_t tbl[256];
static void
@ -62,12 +69,24 @@ dorot13(void *buf, size_t buflen)
}
}
static void
docase(void *buf, size_t buflen)
{
unsigned char *b = buf;
while (buflen--) {
if (isalpha(*b))
*b ^= 0x20;
b++;
}
}
static int
rot13path(struct puffs_usermount *pu, struct puffs_pathobj *base,
struct puffs_cn *pcn)
{
dorot13(pcn->pcn_name, pcn->pcn_namelen);
flipflop(pcn->pcn_name, pcn->pcn_namelen);
return 0;
}
@ -90,9 +109,13 @@ main(int argc, char *argv[])
if (argc < 3)
usage();
flipflop = dorot13;
pflags = lflags = mntflags = 0;
while ((ch = getopt(argc, argv, "o:s")) != -1) {
while ((ch = getopt(argc, argv, "fo:s")) != -1) {
switch (ch) {
case 'f':
flipflop = docase;
break;
case 'o':
mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags);
if (mp == NULL)
@ -175,7 +198,7 @@ rot13_node_readdir(struct puffs_cc *pcc, void *opc, struct dirent *dent,
return rv;
while (rl > *reslen) {
dorot13((uint8_t *)dp->d_name, dp->d_namlen);
flipflop((uint8_t *)dp->d_name, dp->d_namlen);
rl -= _DIRENT_SIZE(dp);
dp = _DIRENT_NEXT(dp);
}
@ -195,7 +218,7 @@ rot13_node_read(struct puffs_cc *pcc, void *opc, uint8_t *buf, off_t offset,
if (rv)
return rv;
dorot13(prebuf, preres - *resid);
flipflop(prebuf, preres - *resid);
return rv;
}
@ -205,6 +228,6 @@ rot13_node_write(struct puffs_cc *pcc, void *opc, uint8_t *buf, off_t offset,
size_t *resid, const struct puffs_cred *pcr, int ioflag)
{
dorot13(buf, *resid);
flipflop(buf, *resid);
return puffs_null_node_write(pcc, opc, buf, offset, resid, pcr, ioflag);
}