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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2018-01-08 23:00:37 +0100
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2018-01-08 23:00:37 +0100
commit104f3121f8005b426d4df77b2420cfe5837033d1 (patch)
tree34bb93d3796e7c45dc1c67a5d40fb3bd1604ad9f /libps/spec.c
parent9d3ba19ddc56ad929f673af23eb87ab07ae30631 (diff)
Implement /proc/<pid>/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.
Diffstat (limited to 'libps/spec.c')
-rw-r--r--libps/spec.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/libps/spec.c b/libps/spec.c
index 5e540f87..4760c431 100644
--- a/libps/spec.c
+++ b/libps/spec.c
@@ -358,6 +358,14 @@ ps_get_num_ports (struct proc_stat *ps)
const struct ps_getter ps_num_ports_getter =
{"num_ports", PSTAT_NUM_PORTS, (vf) ps_get_num_ports};
+static void
+ps_get_exe (struct proc_stat *ps, char **exe_p, int *exe_len_p)
+{
+ *exe_p = proc_stat_exe (ps);
+ *exe_len_p = proc_stat_exe_len (ps);
+}
+const struct ps_getter ps_exe_getter =
+{"exe", PSTAT_EXE, ps_get_exe};
/* ---------------------------------------------------------------- */
/* some printing functions */
@@ -1166,6 +1174,8 @@ static const struct ps_fmt_spec specs[] =
&ps_zero_fills_getter, ps_emit_int, ps_cmp_ints, ps_nominal_zint},
{"Ports", 0, -5, -1, 0,
&ps_num_ports_getter, ps_emit_int, ps_cmp_ints, 0},
+ {"Exe", 0, 0, -1, 0,
+ &ps_exe_getter, ps_emit_string, ps_cmp_strings,ps_nominal_string},
{0}
};