From 104f3121f8005b426d4df77b2420cfe5837033d1 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Mon, 8 Jan 2018 23:00:37 +0100 Subject: Implement /proc//exe by adding proc_set/get_exe to the proc server, making exec call proc_set_exe, and libps call proc_get_exe. procfs can then just retrieve the information to make the "exe" symlink. * hurd/process.defs (proc_set_exe, proc_get_exe): New RPCs. * hurd/process_request.defs: Likewise. * hurd/process_reply.defs: Add skips for proc_set_exe and proc_get_exe RPCs. * proc/proc.h (struct proc): Add `exe' field. * proc/info.c (S_proc_set_exe, S_proc_get_exe): New functions. * proc/mgt.c (process_has_exited): Free p->exe. (S_proc_child): Duplicate parent `exe' into child's `exe'. * exec/exec.c (do_exec): Call proc_set_exe when a filename is available. * libps/ps.h (struct proc_stat): Add `exe_vm_alloced', `exe', and `exe_len' field. (PSTAT_EXE): New macro. (PSTAT_USER_BASE): Change value to make room. (proc_stat_exe, proc_stat_exe_len): New macros. * libps/procstat.c (proc_stat_set_flags): Handle PSTAT_EXE case by calling proc_get_exe. * libps/spec.c (ps_get_exe): New function. (ps_exe_getter): New structure. (ps_fmt_spec): Add "Exe" specification. * procfs/process.c (process_file_symlink_make_node, process_file_gc_exe): New functions. (procfs_dir_entry): Add "exe" entry. * startup/startup.c (launch_core_servers): Set exe paths for startup, auth, proc, and fs servers. (frob_kernel_process): Set exe path for kernel task. (S_startup_essential_task): Set exe path for exec server. --- libps/procstat.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'libps/procstat.c') diff --git a/libps/procstat.c b/libps/procstat.c index f6420eea..d0423410 100644 --- a/libps/procstat.c +++ b/libps/procstat.c @@ -956,6 +956,23 @@ proc_stat_set_flags (struct proc_stat *ps, ps_flags_t flags) } } + /* The process's path to binary executable */ + if (NEED (PSTAT_EXE, PSTAT_PID)) + { + ps->exe = malloc (sizeof(string_t)); + if (ps->exe) + { + if (proc_get_exe (server, ps->pid, ps->exe)) + free (ps->exe); + else + { + ps->exe_len = strlen(ps->exe); + have |= PSTAT_EXE; + ps->exe_vm_alloced = 0; + } + } + } + /* The ctty id port; note that this is just a magic cookie; we use it to fetch a port to the actual terminal -- it's not useful for much else. */ -- cgit v1.2.3