Ok, here you have it:
Code for apx_setuid :
#include <unistd.h>
long
apx_setsid(void)
{
return setsid();
}
Code for apx_setpgid :
#include <unistd.h>
int
apx_setpgid(const long p, const long g)
{
return setpgid((pid_t)p, (pid_t)g);
}
Code for sux (main.c) : (the relevant part is option -s and function do_sid)
#include <sys/types.h>
#include <grp.h>
#include <pwd.h>
#include "abf.h"
#include "amp.h"
#include "apx.h"
#include "msc.h"
#include "rsc.h"
#include "sdb.h"
extern int r2e __P((int));
extern void wrn __P((int)),
die __P((int));
static int
do_env(const xlong f, const char *e)
{
struct amp a;
xlong n, x;
int r = 0;
if (f) *apx_environ = NULL;
if (e) {
amp_opn(&a);
r = env_h2b(&a, e, apx_strlen(e));
if (!r) for (e = a.b, n = a.s.x; n; e += x, n -= x) {
if (!(x = chr(e, n, '+'))) break;
if (r = apx_putenv(e + x)) break;
}
amp_cls(&a);
}
return r;
}
static int
do_dir(const char * const d)
{
return d ? apx_chdir(d) : 0;
}
static long
do_fork(const xlong f)
{
return f ? apx_fork() : 0l;
}
static int
do_sid(const xlong f)
{
int r;
if (r = 0, f & 1)
if (f & 2) { if (apx_setsid() == -1) r = -1; }
else r = apx_setpgid(0l, apx_getpid());
return r;
}
static int
do_prio(const char * const s)
{
xlong x;
int r;
if (r = 0, s) {
if (!scn_u(&x, s)) r = 5;
if (!r) r = apx_setprio(prio_process, 0l, (int)x);
}
return r;
}
static int
do_ioe(const char * const s)
{
xlong x;
int r;
if (r = 0, s) {
if (!scn_x(&x, s)) r = 5;
if (!r) r = apx_setioe((int)x, NULL, NULL);
}
return r;
}
static int
do_rsc(const char * const s)
{
struct sdb sd;
struct rsc rs;
xlong i;
int r;
rsc_opn(&rs);
sdb_opn(&sd);
r = s ? getrsc(&rs, &sd, s) : 0;
if (!r) for (i = 0; i < rs.sze.x; i++)
(void)apx_setrlmt(rs.rds[i].idx, &rs.rds[i].val);
sdb_cls(&sd);
rsc_cls(&rs);
return r;
}
static int
do_crd(const char * const u, const char * const g, const char * const G)
{
struct passwd *pwd = NULL;
struct group *grp = NULL;
struct amp a;
xlong v;
xadk32_t s[ngroups_max];
int r = 0;
char *p;
if (u) if (!(pwd = getpwnam(u))) r = 4;
if (!r) if (g) if (!(grp = getgrnam(g))) r = 4;
if (!r) {
v = grp ? grp->gr_gid : pwd ? pwd->pw_gid : -1ul;
if (v + 1) r = apx_setgid(v);
}
if (!r) if (G) {
amp_opn(&a);
r = amp_mem(&a, G, apx_strlen(G));
if (!r) r = amp_chr(&a, '\0');
if (!r) {
for (p = a.b; *p; p++) if (*p == ',') *p = '\0';
for (v = 0, p = a.b; p - a.b < a.s.x; v++, p++) {
if (v == ngroups_max) break;
if (!(grp = getgrnam(p))) break;
s[v] = grp->gr_gid;
while (*p) p++;
}
if (p - a.b < a.s.x) if (v < ngroups_max) r = 4;
}
amp_cls(&a);
if (!r) if (!v) r = 5;
if (!r) r = apx_setgrp(s, v);
}
if (!r) if (pwd) r = apx_setuid(0ul+pwd->pw_uid);
return r;
}
static int
do_exec(char **a)
{
(void)apx_execve(*a, a + 1, apx_environ);
return 2;
}
static long
__chk(char *s[8])
{
xlong n;
for (n = 8; n; n--) if (s[n - 1]) break;
return n;
}
int
main(int argc, char **argv)
{
xlong i, f;
int r;
char *s[8],
o[] = "fspeu:g:G:d:n:E:x:r:";
apx_memset(s, 0, sizeof s);
apx_opterr = 0;
i = f = 0;
while ((r = apx_getopt(argc, argv, o)) + 1)
switch (r) {
case 'f' : f |= 1; break;
case 's' : f |= 2, f |= 4; break;
case 'p' : f |= 2, f &= ~4; break;
case 'e' : f |= 8; break;
case 'u' : s[0] = apx_optarg; break;
case 'g' : s[1] = apx_optarg; break;
case 'G' : s[2] = apx_optarg; break;
case 'd' : s[3] = apx_optarg; break;
case 'n' : s[4] = apx_optarg; break;
case 'E' : s[5] = apx_optarg; break;
case 'x' : s[6] = apx_optarg; break;
case 'r' : s[7] = apx_optarg; break;
}
argc -= apx_optind, argv += apx_optind;
r = f || __chk(s) ? 0 : argc < 3 ? 1 : (s[0] = *argv++, argc--, 0);
if (!r) r = do_env(f & 8, s[5]);
if (!r) r = do_dir(s[3]);
if (!r) if ((i = do_fork(f & 1)) == -1) r = -1;
/* from now on, only in the child context if forked */
if (!i) {
if (!r) r = do_sid(f & 6 >> 1);
if (!r) r = do_prio(s[4]);
if (!r) r = do_rsc(s[7]);
if (!r) r = do_crd(s[0], s[1], s[2]);
if (!r) r = do_ioe(s[6]);
if (!r) r = do_exec(argv);
}
wrn(r);
if (abf_cmt()) if (!r || r == 4) r = -1;
return r2e(r);
}
On 7/16/06, Otto Moerbeek <[EMAIL PROTECTED]> wrote:
On Sun, 16 Jul 2006, Gustavo Rios wrote:
> Hey folks,
>
> i am trying to set a process as the session leader of its own. I wrote
> a simple program that handles that. It is working when i call it from
> my shell command line:
>
> $ sux -s -e -E \
>
PATH==/home/grios/.bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin:/usr/games:/asd/bin:/asd/sbin:/asd/thr=,ASDROOT==/asd=
> /asd/sbin/algr algr argm ............
>
> But when i write a simple shell script like in :
>
> #!/bin/sh
> sux -s -e -E \
>
PATH==/home/grios/.bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin:/usr/games:/asd/bin:/asd/sbin:/asd/thr=,ASDROOT==/asd=
> /asd/sbin/algr algr argm ............
>
> The process is not put on its own session as a leader the (setsid)
> returns no errors.
>
> Does anybody have any ideia what the behavior problem i am not seeing ?
Please show the code.
How do you check if the program has become session leader?
Any other process group/session stuff being done in your program?
-Otto
