2001-11-23 Roland McGrath <roland@frob.com>

	* gcore.c: New file (previously ../exec/gcore.c).  Update the code.
	* Makefile (targets): Add gcore.

2 files changed, 107 insertions, 3 deletions

diff --git a/utils/Makefile b/utils/Makefile
index e0d0bc16..cdd1dcdf 100644
--- a/utils/Makefile
+++ b/utils/Makefile
@@ -1,5 +1,5 @@
 #
-#   Copyright (C) 1994,95,96,97,98,99,2000 Free Software Foundation, Inc.
+#   Copyright (C) 1994,95,96,97,98,99,2000,01 Free Software Foundation, Inc.
 #
 #   This program is free software; you can redistribute it and/or
 #   modify it under the terms of the GNU General Public License as
@@ -21,14 +21,14 @@ makemode := utilities
 targets = shd ps settrans showtrans syncfs fsysopts \
 	storeinfo login w uptime ids loginpr sush vmstat portinfo \
 	devprobe vminfo addauth rmauth unsu setauth ftpcp ftpdir storecat \
-	storeread ping msgport rpctrace mount
+	storeread ping msgport rpctrace mount gcore
 special-targets = loginpr sush uptime
 SRCS = shd.c ps.c settrans.c syncfs.c showtrans.c addauth.c rmauth.c \
 	fsysopts.c storeinfo.c login.c loginpr.sh sush.sh w.c \
 	uptime.sh psout.c ids.c vmstat.c portinfo.c devprobe.c vminfo.c \
 	parse.c frobauth.c frobauth-mod.c setauth.c pids.c nonsugid.c \
 	unsu.c ftpcp.c ftpdir.c storeread.c storecat.c ping.c msgport.c \
-	rpctrace.c mount.c
+	rpctrace.c mount.c gcore.c
 LCLHDRS = psout.h parse.h pids.h frobauth.h
 
 OBJS = $(filter-out %.sh,$(SRCS:.c=.o))
diff --git a/utils/gcore.c b/utils/gcore.c
new file mode 100644
index 00000000..be9a4f2f
--- /dev/null
+++ b/utils/gcore.c
@@ -0,0 +1,104 @@
+/* `gcore' program for GNU Hurd: write a core dump from a running process.
+   Copyright (C) 1992,2001 Free Software Foundation, Inc.
+   Written by Roland McGrath.
+
+This file is part of the GNU Hurd.
+
+The GNU Hurd is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU Hurd is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <hurd.h>
+#include <hurd/crash.h>
+#include <hurd/paths.h>
+#include <fcntl.h>
+#include <argp.h>
+#include <error.h>
+
+static const struct argp argp =
+{
+  NULL, NULL,
+  "PID...",
+  "Generate a core dump file from a running process"
+  "\vFor each PID, a core dump file \"core.PID\" is written."
+};
+
+int
+main (int argc, char **argv)
+{
+  int status = 0;
+  file_t crashserv;
+  int argi;
+
+  argp_parse (&argp, argc, argv, 0, &argi, 0);
+
+  crashserv = file_name_lookup (_SERVERS_CRASH, 0, 0);
+  if (crashserv == MACH_PORT_NULL)
+    error (1, errno, "cannot reach crash server: %s", _SERVERS_CRASH);
+
+  for (; argi < argc; ++argi)
+    {
+      char *end;
+      pid_t pid;
+      task_t task;
+
+      pid = strtol (argv[argi], &end, 10);
+      if (end == argv[argi] || *end != '\0')
+	{
+	  error (0, 0, "cannot parse process ID: %s", argv[argi]);
+	  status = 1;
+	  continue;
+	}
+
+      task = pid2task ((pid_t) pid);
+      if (task == MACH_PORT_NULL)
+	{
+	  error (0, errno, "pid2task: %d", pid);
+	  status = 1;
+	}
+      else
+	{
+	  file_t file;
+	  char *name = 0;
+	  asprintf (&name, "core.%d", pid);
+
+	  file = file_name_lookup (name, O_WRONLY|O_CREAT,
+					  0600 &~ getumask ());
+	  if (file == MACH_PORT_NULL)
+	    {
+	      error (0, errno, "cannot create %s", name);
+	      status = 1;
+	    }
+	  else
+	    {
+	      error_t err = crash_dump_task (crashserv, task, file,
+					     0, 0, 0, 0, 0, 0,
+					     MACH_PORT_NULL,
+					     MACH_MSG_TYPE_COPY_SEND);
+	      mach_port_deallocate (mach_task_self (), file);
+	      if (err)
+		{
+		  (void) remove (name);
+		  error (0, err, "crash_dump_task on %d to %s", pid, name);
+		  status = 1;
+		}
+	      free (name);
+	    }
+	}
+      mach_port_deallocate (mach_task_self (), task);
+    }
+
+  return status;
+}