Add a global cmdline file

* main.c (argp_parser, main): Add the --kernel-pid option.
* main.h: Publish it.
* rootdir.c (rootdir_gc_cmdline): New function.

1 files changed, 11 insertions, 0 deletions

diff --git a/main.c b/main.c
index 26f5248f..fee4867c 100644
--- a/main.c
+++ b/main.c
@@ -14,6 +14,7 @@
 int opt_clk_tck;
 mode_t opt_stat_mode;
 pid_t opt_fake_self;
+pid_t opt_kernel_pid;
 
 static error_t
 argp_parser (int key, char *arg, struct argp_state *state)
@@ -44,6 +45,12 @@ argp_parser (int key, char *arg, struct argp_state *state)
       else
 	opt_fake_self = 1;
       break;
+
+    case 'k':
+      opt_kernel_pid = strtol (arg, &endp, 0);
+      if (*endp || ! *arg || (signed) opt_kernel_pid < 0)
+	error (1, 0, "--kernel-process: PID must be a positive integer");
+      break;
   }
 
   return 0;
@@ -64,6 +71,9 @@ struct argp argp = {
 	"Provide a fake \"self\" symlink to the given PID, for compatibility "
 	"purposes.  If PID is omitted, \"self\" will point to init.  "
 	"(default: no self link)" },
+    { "kernel-process", 'k', "PID", 0,
+	"Process identifier for the kernel, used to retreive its command line "
+	"(default: 2)" },
     {}
   },
   .parser = argp_parser,
@@ -112,6 +122,7 @@ int main (int argc, char **argv)
   opt_clk_tck = sysconf(_SC_CLK_TCK);
   opt_stat_mode = 0400;
   opt_fake_self = -1;
+  opt_kernel_pid = 2;
   argp_parse (&argp, argc, argv, 0, 0, 0);
 
   task_get_bootstrap_port (mach_task_self (), &bootstrap);