schreiner@iravcl.ira.uka.de (10/02/89)
Here are setpgrp(2) and getpgrp(2) for MINIX. The shar archive contains
four shar archives which contain the changes/files for ~/h, ~/mm, ~/fs,
and libc.a. Two 'unused' function numbers are used for the system calls
to avoid conflicts. The first raw implementation was made by Thomas Mohr
while working on his multiple terminal emulator. This one should be
POSIX compatible. We didn't tell TTY when a process group leader has
called stepgrp(2) because his pgrp is already equal to his pid, nothing
to 0. Credit must also be given to Johan W. Stevenson, he gave us some
hints how to do the work.
Ralf Wenk, using a friends account
----------------------- Cut here ---------------------------------------------
echo x - fs.shar
sed 's/^X//' > fs.shar << '/'
Xecho x - misc.c.cdif
Xsed 's/^X//' > misc.c.cdif << '/'
XX*** misc.c Sun Oct 1 22:47:25 1989
XX--- /usr/sys/fs/misc.c Sun Oct 1 22:46:20 1989
XX***************
XX*** 7,13 ****
XX * do_sync: perform the SYNC system call
XX * do_fork: adjust the tables after MM has performed a FORK system call
XX * do_exit: a process has exited; note that in the tables
XX! * do_set: set uid or gid for some process
XX * do_revive: revive a process that was waiting for something (e.g. TTY)
XX */
XX
XX--- 7,13 ----
XX * do_sync: perform the SYNC system call
XX * do_fork: adjust the tables after MM has performed a FORK system call
XX * do_exit: a process has exited; note that in the tables
XX! * do_set: set uid or gid or pgrp for some process
XX * do_revive: revive a process that was waiting for something (e.g. TTY)
XX */
XX
XX***************
XX*** 220,225 ****
XX--- 220,231 ----
XX tfp->fp_effgid = (gid) eff_grp_id;
XX tfp->fp_realgid = (gid) real_grp_id;
XX }
XX+ if (fs_call == SETPGRP) {
XX+ /* Is this a process group leader ? */
XX+ if ( tfp->fp_pid != tfp->fp_pgrp )
XX+ tfp->fs_tty = 0; /* remove its control terminal */
XX+ tfp->fp_pgrp = pgrp;
XX+ }
XX return(OK);
XX }
XX
X/
Xecho x - param.h.cdif
Xsed 's/^X//' > param.h.cdif << '/'
XX*** param.h Sun Oct 1 22:31:30 1989
XX--- /usr/sys/fs/param.h Sun Oct 1 19:01:18 1989
XX***************
XX*** 27,32 ****
XX--- 27,33 ----
XX #define owner m.m1_i2
XX #define parent m.m1_i1
XX #define pathname m.m3_ca1
XX+ #define pgrp m.m1_i2
XX #define pid m.m1_i3
XX #define pro m.m1_i1
XX #define rd_only m.m1_i3
X/
Xecho x - table.c.cdif
Xsed 's/^X//' > table.c.cdif << '/'
XX*** table.c Sun Oct 1 22:31:39 1989
XX--- /usr/sys/fs/table.c Sun Oct 1 18:45:51 1989
XX***************
XX*** 82,89 ****
XX do_set, /* 46 = setgid */
XX no_sys, /* 47 = getgid */
XX no_sys, /* 48 = sig */
XX! no_sys, /* 49 = unused */
XX! no_sys, /* 50 = unused */
XX no_sys, /* 51 = (acct) */
XX no_sys, /* 52 = (phys) */
XX no_sys, /* 53 = (lock) */
XX--- 82,89 ----
XX do_set, /* 46 = setgid */
XX no_sys, /* 47 = getgid */
XX no_sys, /* 48 = sig */
XX! do_set, /* 49 = setpgrp */
XX! no_sys, /* 50 = getpgrp */
XX no_sys, /* 51 = (acct) */
XX no_sys, /* 52 = (phys) */
XX no_sys, /* 53 = (lock) */
X/
/
echo x - h.shar
sed 's/^X//' > h.shar << '/'
Xecho x - callnr.h.cdif
Xsed 's/^X//' > callnr.h.cdif << '/'
XX*** callnr.h Sun Oct 1 22:07:13 1989
XX--- /usr/sys/h/callnr.h Sun Oct 1 18:12:30 1989
XX***************
XX*** 37,42 ****
XX--- 37,44 ----
XX #define SETGID 46
XX #define GETGID 47
XX #define SIGNAL 48
XX+ #define SETPGRP 49
XX+ #define GETPGRP 50
XX #define IOCTL 54
XX #define EXEC 59
XX #define UMASK 60
X/
/
echo x - lib.shar
sed 's/^X//' > lib.shar << '/'
Xecho x - getpgrp.c
Xsed 's/^X//' > getpgrp.c << '/'
XX
XXPUBLIC int getpgrp()
XX{
XX return callm1(MM, GETPGRP, 0, 0, 0, NIL_PTR, NIL_PTR, NIL_PTR);
XX}
X/
Xecho x - setpgrp.c
Xsed 's/^X//' > setpgrp.c << '/'
XX
XXPUBLIC int setpgrp()
XX{
XX return callm1(MM, SETPGRP, 0, 0, 0, NIL_PTR, NIL_PTR, NIL_PTR);
XX}
X/
/
echo x - mm.shar
sed 's/^X//' > mm.shar << '/'
Xecho x - getset.c.cdif
Xsed 's/^X//' > getset.c.cdif << '/'
XX*** getset.c Sun Oct 1 22:15:05 1989
XX--- /usr/sys/mm/getset.c Sun Oct 1 18:43:44 1989
XX***************
XX*** 1,4 ****
XX--- 1,5 ----
XX /* This file handles the 4 system calls that get and set uids and gids.
XX+ * Plus the two calls that get and set the process group.
XX * It also handles getpid(). The code for each one is so tiny that it hardly
XX * seemed worthwhile to make each a separate function.
XX */
XX***************
XX*** 17,25 ****
XX *===========================================================================*/
XX PUBLIC int do_getset()
XX {
XX! /* Handle GETUID, GETGID, GETPID, SETUID, SETGID. The three GETs return
XX! * their primary results in 'r'. GETUID and GETGID also return secondary
XX! * results (the effective IDs) in 'result2', which is returned to the user.
XX */
XX
XX register struct mproc *rmp = mp;
XX--- 18,27 ----
XX *===========================================================================*/
XX PUBLIC int do_getset()
XX {
XX! /* Handle GETUID, GETGID, GETPID, SETUID, SETGID, SETPGRP, GETPGRP. The four
XX! * GETs return their primary results in 'r'. GETUID and GETGID also return
XX! * secondary results (the effective IDs) in 'result2', which is returned to
XX! * the user.
XX */
XX
XX register struct mproc *rmp = mp;
XX***************
XX*** 58,64 ****
XX tell_fs(SETGID, who, grpid, grpid);
XX r = OK;
XX break;
XX! }
XX!
XX! return(r);
XX! }
XX--- 60,76 ----
XX tell_fs(SETGID, who, grpid, grpid);
XX r = OK;
XX break;
XX!
XX! case SETPGRP:
XX! r = rmp->mp_pid;
XX! rmp->mp_procgrp = r;
XX! tell_fs( SETPGRP, who, r, r );
XX! break;
XX!
XX! case GETPGRP:
XX! r = rmp->mp_procgrp;
XX! break;
XX! }
XX!
XX! return(r);
XX! }
X/
Xecho x - table.c.cdif
Xsed 's/^X//' > table.c.cdif << '/'
XX*** table.c Sun Oct 1 22:15:10 1989
XX--- /usr/sys/mm/table.c Sun Oct 1 18:14:35 1989
XX***************
XX*** 79,86 ****
XX do_getset, /* 46 = setgid */
XX do_getset, /* 47 = getgid */
XX do_signal, /* 48 = sig */
XX! no_sys, /* 49 = unused */
XX! no_sys, /* 50 = unused */
XX no_sys, /* 51 = (acct) */
XX no_sys, /* 52 = (phys) */
XX no_sys, /* 53 = (lock) */
XX--- 79,86 ----
XX do_getset, /* 46 = setgid */
XX do_getset, /* 47 = getgid */
XX do_signal, /* 48 = sig */
XX! do_getset, /* 49 = setpgrp */
XX! do_getset, /* 50 = getpgrp */
XX no_sys, /* 51 = (acct) */
XX no_sys, /* 52 = (phys) */
XX no_sys, /* 53 = (lock) */
X/
/
exit 0