I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. 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.
253 lines
6.2 KiB
C
253 lines
6.2 KiB
C
/*
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* Copyright (c) 2013, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* mv.c
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* Rename files and directories.
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*/
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#include <sys/stat.h>
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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char* basename_dup(const char* path)
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{
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char* copy = strdup(path);
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if ( !copy )
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return (char*) NULL;
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char* result = strdup(basename(copy));
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free(copy);
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if ( !result )
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return (char*) NULL;
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return result;
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}
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static const int FLAG_VERBOSE = 1 << 0;
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static const int FLAG_ASK_OVERWRITE = 1 << 1;
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bool mv(int src_dirfd, const char* src_rel, const char* src_path,
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int dst_dirfd, const char* dst_rel, const char* dst_path,
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int flags)
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{
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if ( flags & FLAG_VERBOSE )
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printf("`%s' -> `%s'\n", src_path, dst_path);
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if ( flags & FLAG_ASK_OVERWRITE )
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{
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// TODO: Ask for confirmation if needed.
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}
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if ( renameat(src_dirfd, src_rel, dst_dirfd, dst_rel) < 0 )
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{
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error(0, errno, "renaming `%s' to `%s'", src_path, dst_path);
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return false;
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}
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return true;
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}
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static void compact_arguments(int* argc, char*** argv)
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{
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for ( int i = 0; i < *argc; i++ )
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{
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while ( i < *argc && !(*argv)[i] )
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{
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for ( int n = i; n < *argc; n++ )
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(*argv)[n] = (*argv)[n+1];
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(*argc)--;
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}
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}
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}
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static void help(FILE* fp, const char* argv0)
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{
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fprintf(fp, "Usage: %s [OPTION]... [-T] SOURCE DEST\n", argv0);
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fprintf(fp, " or: %s [OPTION]... SOURCE... DIRECTORY\n", argv0);
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fprintf(fp, " or: %s [OPTION]... -t DIRECTORY SOURCE...\n", argv0);
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}
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static void version(FILE* fp, const char* argv0)
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{
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fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
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}
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int main(int argc, char* argv[])
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{
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int flags = 0;
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bool flag_no_target_directory = false;
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const char* target_directory = NULL;
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const char* argv0 = argv[0];
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for ( int i = 1; i < argc; i++ )
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{
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const char* arg = argv[i];
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if ( arg[0] != '-' || !arg[1] )
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continue;
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argv[i] = NULL;
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if ( !strcmp(arg, "--") )
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break;
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if ( arg[1] != '-' )
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{
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char c;
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while ( (c = *++arg) ) switch ( c )
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{
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case 'f': flags &= ~FLAG_ASK_OVERWRITE; break;
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#if 0
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case 'i': flags |= FLAG_ASK_OVERWRITE; break;
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case 'n': flags |= FLAG_NO_CLOBBER; break;
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#endif
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case 't':
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if ( *(arg + 1) )
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target_directory = arg + 1;
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else if ( i + 1 == argc )
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{
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error(0, 0, "option requires an argument -- '%c'", c);
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fprintf(stderr, "Try '%s --help' for more information\n", argv0);
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exit(1);
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}
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else
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{
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target_directory = argv[i+1];
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argv[++i] = NULL;
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}
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arg = "t";
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break;
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case 'T': flag_no_target_directory = true; break;
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#if 0
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case 'u': flags |= FLAG_UPDATE; break;
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#endif
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case 'v': flags |= FLAG_VERBOSE; break;
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default:
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fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
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help(stderr, argv0);
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exit(1);
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}
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}
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else if ( !strcmp(arg, "--target-directory") )
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{
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if ( i + 1 == argc )
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{
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error(0, 0, "option '--target-directory 'requires an argument");
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fprintf(stderr, "Try '%s --help' for more information\n", argv0);
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exit(1);
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}
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target_directory = argv[++i];
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argv[i] = NULL;
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}
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else if ( !strncmp(arg, "--target-directory=", strlen("--target-directory=")) )
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target_directory = arg + strlen("--target-directory=");
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else if ( !strcmp(arg, "--no-target-directory") )
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flag_no_target_directory = true;
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else if ( !strcmp(arg, "--help") )
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help(stdout, argv0), exit(0);
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else if ( !strcmp(arg, "--version") )
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version(stdout, argv0), exit(0);
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else
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{
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fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
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help(stderr, argv0);
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exit(1);
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}
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}
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if ( target_directory && flag_no_target_directory )
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error(1, 0, "cannot combine --target-directory (-t) and --no-target-directory (-T)");
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compact_arguments(&argc, &argv);
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if ( argc < 2 )
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error(1, 0, "missing file operand");
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if ( !target_directory && !flag_no_target_directory && argc == 3 )
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{
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const char* dst = argv[2];
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struct stat dst_st;
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if ( stat(dst, &dst_st) < 0 )
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flag_no_target_directory = true;
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else if ( !S_ISDIR(dst_st.st_mode) )
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flag_no_target_directory = true;
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}
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if ( flag_no_target_directory )
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{
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const char* src = argv[1];
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if ( argc < 3 )
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error(1, 0, "missing destination file operand after `%s'", src);
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const char* dst = argv[2];
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if ( 3 < argc )
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error(1, 0, "extra operand `%s'", argv[3]);
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return mv(AT_FDCWD, src, src,
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AT_FDCWD, dst, dst,
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flags) ? 0 : 1;
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}
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if ( !target_directory )
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{
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target_directory = argv[--argc];
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argv[argc] = NULL;
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}
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int dst_dirfd = open(target_directory, O_RDONLY | O_DIRECTORY);
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if ( dst_dirfd < 0 )
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error(1, errno, "`%s'", target_directory);
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if ( argc < 2 )
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error(1, 0, "missing file operand");
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const char* join = "/";
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if ( strlen(target_directory) &&
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target_directory[strlen(target_directory)-1] == '/' )
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join = "";
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bool success = true;
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for ( int i = 1; i < argc; i++ )
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{
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const char* src = argv[i];
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int src_dirfd = AT_FDCWD;
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const char* src_rel = src;
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const char* src_path = src;
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char* dst_rel = basename_dup(src_path);
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if ( !dst_rel )
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{
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error(0, errno, "strdup");
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success = false;
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continue;
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}
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char* dst_path = NULL;
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asprintf(&dst_path, "%s%s%s", target_directory, join, dst_rel);
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if ( !dst_path )
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{
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error(0, errno, "asprintf");
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free(dst_rel);
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success = false;
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continue;
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}
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if ( !mv(src_dirfd, src_rel, src_path,
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dst_dirfd, dst_rel, dst_path,
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flags) )
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success = false;
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free(dst_path);
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free(dst_rel);
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}
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close(dst_dirfd);
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return success ? 0 : 1;
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}
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