From 2d3597c3a02f821bb364b8ecc23fc5949fca738d Mon Sep 17 00:00:00 2001 From: user Date: Thu, 16 Jul 2026 11:10:45 +0200 Subject: kill + ps: implement SYS_KILL (pid 1 immortal) and a ps tool - PCB gains PROC_PROG (running program id), set by exec, inherited on fork. - sys_kill(pid): reject pid 1 (immortal) and unknown/dead pids; mark the target zombie, reparent its children to init, wake its parent if blocked in wait; schedule away if a process kills itself. Reuses FindPcbByPid/ReparentToInit. - sys_ps(slot,buf)->{pid,state,prog}; sys_progname(id) via NameTable reverse lookup. NameTable gains sh/ps/kill. - libc: kill/psget/progname; tools ps (pid state cmd) and kill . - verified: ps lists sh(B)+ps(R); kill 1 refused; kill 42 fails. --- c/kill.c | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 c/kill.c (limited to 'c/kill.c') diff --git a/c/kill.c b/c/kill.c new file mode 100644 index 0000000..e524627 --- /dev/null +++ b/c/kill.c @@ -0,0 +1,10 @@ +#include "gbos.h" +/* kill : terminate a process (pid 1 is immortal). */ +void main(void) { + char *argv[4]; + unsigned char argc = argv_parse(argv, 4); + unsigned char pid; + if (argc < 1) { puts("usage: kill "); nl(); return; } + pid = atou(argv[0]); + if (kill(pid)) { puts("kill: no such pid (or immortal)"); nl(); } +} -- cgit v1.3.1-sl0p