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exec: Provide execpath in imgp for the process_exec hook.

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This was previously set after the hook and only if auxargs were present.
Now always provide it if possible.

MFC after:	2 weeks
Reviewed by:	kib
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D6546
This commit is contained in:
Bryan Drewery 2016-05-26 23:19:39 +00:00
parent 881010f05d
commit 1afd78b34d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=300793
1 changed files with 16 additions and 8 deletions
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24
sys/kern/kern_exec.c
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@ -567,6 +567,19 @@ do_execve(td, args, mac_p)
}
/* The new credentials are installed into the process later. */
/*
* Do the best to calculate the full path to the image file.
*/
if (args->fname != NULL && args->fname[0] == '/')
imgp->execpath = args->fname;
else {
VOP_UNLOCK(imgp->vp, 0);
if (vn_fullpath(td, imgp->vp, &imgp->execpath,
&imgp->freepath) != 0)
imgp->execpath = args->fname;
vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
}
/*
* If the current process has a special image activator it
* wants to try first, call it. For example, emulating shell
@ -629,6 +642,9 @@ do_execve(td, args, mac_p)
crfree(imgp->newcred);
imgp->newcred = NULL;
}
imgp->execpath = NULL;
free(imgp->freepath, M_TEMP);
imgp->freepath = NULL;
/* set new name to that of the interpreter */
NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME,
UIO_SYSSPACE, imgp->interpreter_name, td);
@ -642,14 +658,6 @@ do_execve(td, args, mac_p)
*/
VOP_UNLOCK(imgp->vp, 0);
/*
* Do the best to calculate the full path to the image file.
*/
if (imgp->auxargs != NULL &&
((args->fname != NULL && args->fname[0] == '/') ||
vn_fullpath(td, imgp->vp, &imgp->execpath, &imgp->freepath) != 0))
imgp->execpath = args->fname;
if (disallow_high_osrel &&
P_OSREL_MAJOR(p->p_osrel) > P_OSREL_MAJOR(__FreeBSD_version)) {
error = ENOEXEC;