/* $OpenBSD: fargs.c,v 1.22 2021/11/03 14:42:12 deraadt Exp $ */ /* * Copyright (c) 2019 Kristaps Dzonsons * * 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 #include #include #include #include #include #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 seperators */ 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 (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); /* only add --compare-dest, etc if this is the sender */ if (sess->opts->alt_base_mode != 0 && f->mode == FARGS_SENDER) { 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; }