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Implemented support for the "ps_strings" structure (grrrr...) for use in

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the userland library libkvm.
This commit is contained in:
David Greenman 1994-08-06 09:06:31 +00:00
parent f720dc2ceb
commit 93f6448c49
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=1886
1 changed files with 19 additions and 3 deletions
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22
sys/kern/kern_exec.c
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@ -28,7 +28,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: kern_execve.c,v 1.20 1994/03/26 12:24:27 davidg Exp $
* $Id: kern_exec.c,v 1.2 1994/05/25 09:03:03 rgrimes Exp $
*/
#include <sys/param.h>
@ -418,12 +418,13 @@ exec_copyout_strings(iparams)
char *stringp, *destp;
int *stack_base;
int vect_table_size, string_table_size;
struct ps_strings *arginfo;
/*
* Calculate string base and vector table pointers.
*/
destp = (caddr_t) ((caddr_t)USRSTACK -
roundup((ARG_MAX - iparams->stringspace), sizeof(char *)));
arginfo = PS_STRINGS;
destp = (caddr_t)arginfo - roundup((ARG_MAX - iparams->stringspace), sizeof(char *));
/*
* The '+ 2' is for the null pointers at the end of each of the
* arg and env vector sets
@ -440,6 +441,15 @@ exec_copyout_strings(iparams)
argc = iparams->argc;
envc = iparams->envc;
/*
* Fill in "ps_strings" struct for ps, w, etc.
*/
arginfo->ps_argvstr = destp;
arginfo->ps_nargvstr = argc;
/*
* Copy the arg strings and fill in vector table as we go.
*/
for (; argc > 0; --argc) {
*(vectp++) = destp;
while (*destp++ = *stringp++);
@ -448,6 +458,12 @@ exec_copyout_strings(iparams)
/* a null vector table pointer seperates the argp's from the envp's */
*(vectp++) = NULL;
arginfo->ps_envstr = destp;
arginfo->ps_nenvstr = envc;
/*
* Copy the env strings and fill in vector table as we go.
*/
for (; envc > 0; --envc) {
*(vectp++) = destp;
while (*destp++ = *stringp++);