IABSD.fr/src/usr.bin/rsync/fargs.c

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• Author : claudio
  Date : 2023-11-27 11:30:49
  Hash : 16f87427
  Message : Implement --omit-link-times / -J based on the --omit-dir-times work done by job@. OK tb@

• usr.bin/rsync/fargs.c

• /*	$OpenBSD: fargs.c,v 1.26 2023/11/27 11:30:49 claudio Exp $ */
  /*
   * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  #include <sys/stat.h>
  
  #include <assert.h>
  #include <err.h>
  #include <stdint.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "extern.h"
  
  #define	RSYNC_PATH	"rsync"
  
  const char *
  alt_base_mode(int mode)
  {
  	switch (mode) {
  	case BASE_MODE_COMPARE:
  		return "--compare-dest";
  	case BASE_MODE_COPY:
  		return "--copy-dest";
  	case BASE_MODE_LINK:
  		return "--link-dest";
  	default:
  		errx(1, "unknown base mode %d", mode);
  	}
  }
  
  char **
  fargs_cmdline(struct sess *sess, const struct fargs *f, size_t *skip)
  {
  	arglist		 args;
  	size_t		 j;
  	char		*rsync_path, *ap, *arg;
  
  	memset(&args, 0, sizeof args);
  
  	assert(f != NULL);
  	assert(f->sourcesz > 0);
  
  	if ((rsync_path = sess->opts->rsync_path) == NULL)
  		rsync_path = RSYNC_PATH;
  
  	if (f->host != NULL) {
  		/*
  		 * Splice arguments from -e "foo bar baz" into array
  		 * elements required for execve(2).
  		 * This doesn't do anything fancy: it splits along
  		 * whitespace into the array.
  		 */
  
  		if (sess->opts->ssh_prog) {
  			ap = strdup(sess->opts->ssh_prog);
  			if (ap == NULL)
  				err(ERR_NOMEM, NULL);
  
  			while ((arg = strsep(&ap, " \t")) != NULL) {
  				if (arg[0] == '\0') {
  					ap++;	/* skip separators */
  					continue;
  				}
  
  				addargs(&args, "%s", arg);
  			}
  		} else
  			addargs(&args, "ssh");
  
  		addargs(&args, "%s", f->host);
  		addargs(&args, "%s", rsync_path);
  		if (skip)
  			*skip = args.num;
  		addargs(&args, "--server");
  		if (f->mode == FARGS_RECEIVER)
  			addargs(&args, "--sender");
  	} else {
  		addargs(&args, "%s", rsync_path);
  		addargs(&args, "--server");
  	}
  
  	/* Shared arguments. */
  
  	if (sess->opts->del)
  		addargs(&args, "--delete");
  	if (sess->opts->numeric_ids)
  		addargs(&args, "--numeric-ids");
  	if (sess->opts->preserve_gids)
  		addargs(&args, "-g");
  	if (sess->opts->preserve_links)
  		addargs(&args, "-l");
  	if (sess->opts->dry_run)
  		addargs(&args, "-n");
  	if (sess->opts->preserve_uids)
  		addargs(&args, "-o");
  	if (sess->opts->preserve_perms)
  		addargs(&args, "-p");
  	if (sess->opts->devices)
  		addargs(&args, "-D");
  	if (sess->opts->recursive)
  		addargs(&args, "-r");
  	if (sess->opts->preserve_times)
  		addargs(&args, "-t");
  	if (sess->opts->ignore_times)
  		addargs(&args, "-I");
  	if (verbose > 3)
  		addargs(&args, "-v");
  	if (verbose > 2)
  		addargs(&args, "-v");
  	if (verbose > 1)
  		addargs(&args, "-v");
  	if (verbose > 0)
  		addargs(&args, "-v");
  	if (sess->opts->one_file_system > 1)
  		addargs(&args, "-x");
  	if (sess->opts->one_file_system > 0)
  		addargs(&args, "-x");
  	if (sess->opts->specials && !sess->opts->devices)
  		addargs(&args, "--specials");
  	if (!sess->opts->specials && sess->opts->devices)
  		/* --devices is sent as -D --no-specials */
  		addargs(&args, "--no-specials");
  	if (sess->opts->max_size >= 0)
  		addargs(&args, "--max-size=%lld", sess->opts->max_size);
  	if (sess->opts->min_size >= 0)
  		addargs(&args, "--min-size=%lld", sess->opts->min_size);
  
  	/* extra options for the receiver (local is sender) */
  	if (f->mode == FARGS_SENDER) {
  		if (sess->opts->ignore_dir_times)
  			addargs(&args, "-O");
  		if (sess->opts->ignore_link_times)
  			addargs(&args, "-J");
  		if (sess->opts->size_only)
  			addargs(&args, "--size-only");
  
  		/* only add --compare-dest, etc if this is the sender */
  		if (sess->opts->alt_base_mode != 0) {
  			for (j = 0; j < MAX_BASEDIR; j++) {
  				if (sess->opts->basedir[j] == NULL)
  					break;
  				addargs(&args, "%s=%s",
  				    alt_base_mode(sess->opts->alt_base_mode),
  				    sess->opts->basedir[j]);
  			}
  		}
  	}
  
  	/* Terminate with a full-stop for reasons unknown. */
  
  	addargs(&args, ".");
  
  	if (f->mode == FARGS_RECEIVER) {
  		for (j = 0; j < f->sourcesz; j++)
  			addargs(&args, "%s", f->sources[j]);
  	} else
  		addargs(&args, "%s", f->sink);
  
  	return args.list;
  }