Patch by Padraig O'Briain <Padraig.OBriain@sun.com>, modified by myself so

2005-12-21  Brian Cameron  <brian.cameron@sun.com>

        Patch by Padraig O'Briain <Padraig.OBriain@sun.com>, modified by myself
        so it also works with gdmlogin and not just gdmgreeter.  Also I
        integrated his gdmprefetch.c utility into the configure/Makefile system
        with the --with-prefetch option.

        * configure.ac:  Now support --with-prefetch
        * daemon/gdm.h, daemon/gdmconfig.c, config/gdm.conf.in:  Support
          new PostDisplayProgram key.
        * gui/gdmcommon.[ch], gui/gdmlogin.c, gui/greeter/greeter.c:  Now
          support new PostDisplayProgram key.
        * docs/C/gdm.xml: Add docs for new key.
        * utils/Makefile.am, utils/gdmprefetch.c: Add new
          gdmprefetch utility.
        * config/Makefile.am: Now install gdm.conf file with 444
          permissions and always write over the installed gdm.conf
          after first moving aside the user's gdm.conf file if
          necessary.

2 files changed, 148 insertions, 2 deletions

diff --git a/utils/Makefile.am b/utils/Makefile.am
index 7ec28603..24649db0 100644
--- a/utils/Makefile.am
+++ b/utils/Makefile.am
@@ -14,7 +14,8 @@ INCLUDES = \
 libexec_PROGRAMS = \
 	@GDMASKPASS@	\
 	@GDMOPEN@	\
-	gdmtranslate
+	@GDMPREFETCH@	\
+	gdmtranslate	
 
 # This is not useful anymore
 # bin_PROGRAMS = \
@@ -24,7 +25,7 @@ if DMX_SUPPORT
 bin_PROGRAMS = gdm-dmx-reconnect-proxy
 endif
 
-EXTRA_PROGRAMS = gdmaskpass gdmopen
+EXTRA_PROGRAMS = gdmaskpass gdmopen gdmprefetch
 
 gdmaskpass_SOURCES = \
 	gdmaskpass.c
@@ -35,6 +36,9 @@ gdmtranslate_SOURCES = \
 gdmopen_SOURCES = \
 	gdmopen.c
 
+gdmprefetch_SOURCES = \
+	gdmprefetch.c
+
 #gdmmktemp_SOURCES = \
 #	gdmmktemp.c
 
diff --git a/utils/gdmprefetch.c b/utils/gdmprefetch.c
new file mode 100644
index 00000000..2d6bfc64
--- /dev/null
+++ b/utils/gdmprefetch.c
@@ -0,0 +1,142 @@
+/* GDM - The GNOME Display Manager
+ * Copyright (C) 2005 Sun Microsystems, Inc.
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/*
+ * program to either force pages into memory or force them
+ * out (-o option)
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <strings.h>
+
+int out = 0;
+
+int
+doout(char *s)
+{
+	int fd;
+	void *map;
+	struct stat buf;
+
+	if (((fd = open(s, O_RDONLY)) < 0) ||
+	    (fstat(fd, &buf) < 0) ||
+	    ((map = mmap(NULL, buf.st_size, PROT_READ, MAP_PRIVATE, fd, 0)) ==
+	    MAP_FAILED)) {
+		(void)close(fd);
+		return (-1);
+	}
+
+	(void)close(fd);
+	(void)msync(map, buf.st_size, MS_INVALIDATE);
+	(void)munmap(map, buf.st_size);
+	return (0);
+}
+
+#define SIZE 1024*128
+
+int
+doin(char *s)
+{
+	int fd;
+	char buffer[SIZE];
+	
+	if ((fd = open(s, O_RDONLY)) < 0) {
+		fprintf(stderr, "fopen: %s %s\n", strerror(errno), s);
+		return (-1);
+	}
+
+	while (read(fd, buffer, SIZE) != 0)
+		;
+
+	(void)close(fd);
+
+	return (0);
+}
+
+
+
+int
+main(int argc, char *argv[])
+{
+	FILE *fp = 0;
+	int c, errflg = 0;
+	extern int optind, optopt;
+	extern char *optarg;
+	int i;
+
+	while ((c = getopt(argc, argv, "o:")) != -1) {
+		switch(c) {
+
+		case 'o':
+			out = 1;
+			break;
+		default:
+			errflg++;
+			break;
+
+		}
+	}
+
+	if (errflg) {
+		fprintf(stderr, "usage: %s [-o] filename [filename]\n",
+			argv[0]);
+		exit(1);
+	}
+
+
+	for (; optind < argc; optind++) {
+		if ((argv[optind][0] == '@') && ((fp = fopen(argv[optind], "r")) == 0)) {
+			char path[1024];
+
+			if ((fp = fopen(&(argv[optind][1]), "r")) == 0) {
+				fprintf(stderr, "fopen: %s %s\n", strerror(errno), &argv[optind][1]);
+				continue;
+			}
+			while (fgets(path, sizeof(path), fp) != 0) {
+				path[strlen(path) -1] = '\0';
+
+				if (!out) {
+					doin(path);
+				} else {
+					doout(path);
+				}
+			}
+			fclose (fp);
+			fp = 0;
+
+		} else {
+			if (fp != 0) {
+				fclose (fp);
+				fp = 0;
+			}
+
+			if (!out) {
+				doin(argv[optind]);
+			} else {
+				doout(argv[optind]);
+			}
+		}
+	}
+	exit(0);
+}
+