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implement puffs_write. It's now possible to change the values of

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existing sysctl nodes (except for CTLTYPE_STRUCT).
This commit is contained in:
pooka 2006-11-20 00:04:05 +00:00
parent 12dfa56940
commit 66e8fee83b
1 changed files with 49 additions and 1 deletions
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50
share/examples/puffs/sysctlfs/sysctlfs.c
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@ -1,4 +1,4 @@
/* $NetBSD: sysctlfs.c,v 1.3 2006/11/17 17:48:51 pooka Exp $ */
/* $NetBSD: sysctlfs.c,v 1.4 2006/11/20 00:04:05 pooka Exp $ */
/*
* Copyright (c) 2006 Antti Kantee. All Rights Reserved.
@ -100,6 +100,7 @@ main(int argc, char *argv[])
pvn.puffs_getattr = sysctlfs_getattr;
pvn.puffs_readdir = sysctlfs_readdir;
pvn.puffs_read = sysctlfs_read;
pvn.puffs_write = sysctlfs_write;
pvn.puffs_reclaim = sysctlfs_reclaim;
if ((pu = puffs_mount(&pvfs, &pvn, argv[1], 0, "sysctlfs",
@ -154,6 +155,7 @@ doprint(struct sfsnode *sfs, char *buf, size_t bufsize)
if (sysctl(sfs->name, sfs->hierlen, &q, &sz, NULL, 0) == -1)
break;
snprintf(buf, bufsize, "%" PRId64, q);
break;
}
case CTLTYPE_STRUCT:
snprintf(buf, bufsize, "CTLTYPE_STRUCT: implement me and "
@ -364,6 +366,52 @@ sysctlfs_read(struct puffs_usermount *pu, void *opc, uint8_t *buf,
return 0;
}
int
sysctlfs_write(struct puffs_usermount *pu, void *opc, uint8_t *buf,
off_t offset, size_t *resid, const struct puffs_cred *cred,
int ioflag)
{
struct sfsnode *sfs = opc;
long long ll;
int i, rv;
if (ISADIR(sfs))
return EISDIR;
if (offset != 0)
return EINVAL;
if (ioflag & PUFFS_IO_APPEND)
return EINVAL;
switch (SYSCTL_TYPE(sfs->sctln.sysctl_flags)) {
case CTLTYPE_INT:
if (sscanf((const char *)buf, "%d", &i) != 1)
return EINVAL;
rv = sysctl(sfs->name, sfs->hierlen, NULL, NULL,
&i, sizeof(int));
break;
case CTLTYPE_QUAD:
if (sscanf((const char *)buf, "%lld", &ll) != 1)
return EINVAL;
rv = sysctl(sfs->name, sfs->hierlen, NULL, NULL,
&ll, sizeof(long long));
break;
case CTLTYPE_STRING:
rv = sysctl(sfs->name, sfs->hierlen, NULL, NULL, buf, *resid);
break;
default:
rv = EINVAL;
break;
}
if (rv)
return rv;
*resid = 0;
return 0;
}
int
sysctlfs_reclaim(struct puffs_usermount *pu, void *opc, pid_t pid)
{