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Open accounting file for appending, not general writing.

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This allows accton(1) to be used with an append-only file.

PR:		7169
Reported by:	Joao Carlos Mendes Luis <jonny@jonny.eng.br>
Reviewed by:	bde
Approved by:	sheldonh (mentor)
MFC after:	2 weeks
This commit is contained in:
Johan Karlsson 2002-07-10 17:31:58 +00:00
parent 8c6d67ef99
commit 92da2e7671
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99740
1 changed files with 8 additions and 7 deletions
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15
sys/kern/kern_acct.c
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@ -127,19 +127,19 @@ acct(td, uap)
mtx_lock(&Giant);
/*
* If accounting is to be started to a file, open that file for
* writing and make sure it's a 'normal'.
* appending and make sure it's a 'normal'.
*/
if (SCARG(uap, path) != NULL) {
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path),
td);
flags = FWRITE;
flags = FWRITE | O_APPEND;
error = vn_open(&nd, &flags, 0);
if (error)
goto done2;
NDFREE(&nd, NDF_ONLY_PNBUF);
VOP_UNLOCK(nd.ni_vp, 0, td);
if (nd.ni_vp->v_type != VREG) {
vn_close(nd.ni_vp, FWRITE, td->td_ucred, td);
vn_close(nd.ni_vp, FWRITE | O_APPEND, td->td_ucred, td);
error = EACCES;
goto done2;
}
@ -151,8 +151,8 @@ acct(td, uap)
*/
if (acctp != NULLVP || savacctp != NULLVP) {
callout_stop(&acctwatch_callout);
error = vn_close((acctp != NULLVP ? acctp : savacctp), FWRITE,
td->td_ucred, td);
error = vn_close((acctp != NULLVP ? acctp : savacctp),
FWRITE | O_APPEND, td->td_ucred, td);
acctp = savacctp = NULLVP;
}
if (SCARG(uap, path) == NULL)
@ -316,7 +316,8 @@ acctwatch(a)
if (savacctp != NULLVP) {
if (savacctp->v_type == VBAD) {
(void) vn_close(savacctp, FWRITE, NOCRED, NULL);
(void) vn_close(savacctp, FWRITE | O_APPEND, NOCRED,
NULL);
savacctp = NULLVP;
return;
}
@ -330,7 +331,7 @@ acctwatch(a)
if (acctp == NULLVP)
return;
if (acctp->v_type == VBAD) {
(void) vn_close(acctp, FWRITE, NOCRED, NULL);
(void) vn_close(acctp, FWRITE | O_APPEND, NOCRED, NULL);
acctp = NULLVP;
return;
}