Adding upstream version 2.39.3.upstream/2.39.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 162 insertions, 0 deletions

diff --git a/misc-utils/fadvise.c b/misc-utils/fadvise.c
new file mode 100644
index 0000000..9606fb4
--- /dev/null
+++ b/misc-utils/fadvise.c
@@ -0,0 +1,162 @@
+/*
+ * fadvise - utility to use the posix_fadvise(2)
+ *
+ * Copyright (C) 2022 Red Hat, Inc. All rights reserved.
+ * Written by Masatake YAMATO <yamato@redhat.com>
+ *
+ * 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 would 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#include "c.h"
+#include "nls.h"
+#include "strutils.h"
+
+static const struct advice {
+	const char *name;
+	int num;
+} advices [] = {
+	{ "normal",     POSIX_FADV_NORMAL,     },
+	{ "sequential", POSIX_FADV_SEQUENTIAL, },
+	{ "random",     POSIX_FADV_RANDOM,     },
+	{ "noreuse",    POSIX_FADV_NOREUSE,    },
+	{ "willneeded", POSIX_FADV_WILLNEED,   },
+	{ "dontneed",   POSIX_FADV_DONTNEED,   },
+};
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	size_t i;
+
+	fputs(USAGE_HEADER, out);
+	fprintf(out, _(" %s [options] file\n"), program_invocation_short_name);
+	fprintf(out, _(" %s [options] --fd|-d file-descriptor\n"), program_invocation_short_name);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -a, --advice <advice> applying advice to the file (default: \"dontneed\")\n"), out);
+	fputs(_(" -l, --length <num>    length for range operations, in bytes\n"), out);
+	fputs(_(" -o, --offset <num>    offset for range operations, in bytes\n"), out);
+
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(23));
+
+	fputs(_("\nAvailable values for advice:\n"), out);
+	for (i = 0; i < ARRAY_SIZE(advices); i++) {
+		fprintf(out, "  %s\n",
+			advices[i].name);
+	}
+
+	printf(USAGE_MAN_TAIL("fadvise(1)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char ** argv)
+{
+	int c;
+	int rc;
+	bool do_close = false;
+
+	int fd = -1;
+	off_t offset = 0;
+	off_t len = 0;
+	int advice = POSIX_FADV_DONTNEED;
+
+	static const struct option longopts[] = {
+		{ "advice",     required_argument, NULL, 'a' },
+		{ "fd",         required_argument, NULL, 'd' },
+		{ "length",     required_argument, NULL, 'l' },
+		{ "offset",     required_argument, NULL, 'o' },
+		{ "version",    no_argument,       NULL, 'V' },
+		{ "help",	no_argument,       NULL, 'h' },
+		{ NULL, 0, NULL, 0 },
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+
+	while ((c = getopt_long (argc, argv, "a:d:hl:o:V", longopts, NULL)) != -1) {
+		switch (c) {
+		case 'a':
+			advice = -1;
+			for (size_t i = 0; i < ARRAY_SIZE(advices); i++) {
+				if (strcmp(optarg, advices[i].name) == 0) {
+					advice = advices[i].num;
+					break;
+				}
+			}
+			if (advice == -1)
+				errx(EXIT_FAILURE, "invalid advice argument: '%s'", optarg);
+			break;
+		case 'd':
+			fd = strtos32_or_err(optarg,
+					     _("invalid fd argument"));
+			break;
+		case 'l':
+			len = strtosize_or_err(optarg,
+					       _("invalid length argument"));
+			break;
+		case 'o':
+			offset = strtosize_or_err(optarg,
+						  _("invalid offset argument"));
+			break;
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	if (optind == argc && fd == -1) {
+		warnx(_("no file specified"));
+		errtryhelp(EXIT_FAILURE);
+	}
+
+	if (argc - optind > 0 && fd != -1) {
+		warnx(_("specify either file descriptor or file name"));
+		errtryhelp(EXIT_FAILURE);
+	}
+
+	if (argc - optind > 1) {
+		warnx(_("specify one file descriptor or file name"));
+		errtryhelp(EXIT_FAILURE);
+	}
+
+	if (fd == -1) {
+		fd = open(argv[optind], O_RDONLY);
+		if (fd < 0)
+			err(EXIT_FAILURE, _("cannot open %s"), argv[optind]);
+		do_close = true;
+	}
+
+	rc = posix_fadvise(fd,
+			   offset, len,
+			   advice);
+	if (rc != 0)
+		warnx(_("failed to advise: %s"), strerror(rc));
+
+	if (do_close)
+		close(fd);
+
+	return rc == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+}