[eb649786] | 1 | /* $NetBSD: ln.c,v 1.34 2008/07/20 00:52:40 lukem Exp $ */ |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (c) 1987, 1993, 1994 |
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| 5 | * The Regents of the University of California. All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms, with or without |
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| 8 | * modification, are permitted provided that the following conditions |
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| 9 | * are met: |
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| 10 | * 1. Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * 3. Neither the name of the University nor the names of its contributors |
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| 16 | * may be used to endorse or promote products derived from this software |
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| 17 | * without specific prior written permission. |
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| 18 | * |
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 29 | * SUCH DAMAGE. |
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| 30 | */ |
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| 31 | |
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[9a77af8] | 32 | #ifdef HAVE_CONFIG_H |
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| 33 | #include "config.h" |
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| 34 | #endif |
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| 35 | |
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[eb649786] | 36 | #if 0 |
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| 37 | #ifndef lint |
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| 38 | __COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\ |
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| 39 | The Regents of the University of California. All rights reserved."); |
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| 40 | #endif /* not lint */ |
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| 41 | |
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| 42 | #ifndef lint |
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| 43 | #if 0 |
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| 44 | static char sccsid[] = "@(#)ln.c 8.2 (Berkeley) 3/31/94"; |
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| 45 | #else |
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| 46 | __RCSID("$NetBSD: ln.c,v 1.34 2008/07/20 00:52:40 lukem Exp $"); |
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| 47 | #endif |
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| 48 | #endif /* not lint */ |
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| 49 | #endif |
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| 50 | |
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| 51 | #include <rtems.h> |
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| 52 | #include <rtems/shell.h> |
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| 53 | #include <rtems/shellconfig.h> |
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| 54 | #define __need_getopt_newlib |
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| 55 | #include <getopt.h> |
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| 56 | |
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| 57 | #include <sys/cdefs.h> |
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| 58 | #include <sys/param.h> |
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| 59 | #include <sys/stat.h> |
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| 60 | |
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[6cdaa85] | 61 | #include "err.h" |
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[eb649786] | 62 | #include <errno.h> |
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| 63 | #include <locale.h> |
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| 64 | #include <stdio.h> |
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| 65 | #include <stdlib.h> |
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| 66 | #include <string.h> |
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| 67 | #include <unistd.h> |
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| 68 | |
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| 69 | #include <setjmp.h> |
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| 70 | |
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| 71 | typedef struct { |
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| 72 | int fflag; /* Unlink existing files. */ |
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| 73 | int hflag; /* Check new name for symlink first. */ |
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| 74 | int iflag; /* Interactive mode. */ |
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| 75 | int sflag; /* Symbolic, not hard, link. */ |
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| 76 | int vflag; /* Verbose output */ |
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| 77 | char linkch; |
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| 78 | |
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| 79 | int exit_code; |
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| 80 | jmp_buf exit_jmp; |
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| 81 | } rtems_shell_ln_globals; |
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| 82 | |
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| 83 | #define fflag globals->fflag |
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| 84 | #define hflag globals->hflag |
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| 85 | #define iflag globals->iflag |
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| 86 | #define sflag globals->sflag |
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| 87 | #define vflag globals->vflag |
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| 88 | #define linkch globals->linkch |
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| 89 | |
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| 90 | #define exit_jump &(globals->exit_jmp) |
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| 91 | |
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| 92 | #define exit(ec) rtems_shell_ln_exit(globals, ec) |
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| 93 | |
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| 94 | static int main_ln(rtems_shell_ln_globals* , int, char *[]); |
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| 95 | |
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| 96 | static void |
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| 97 | rtems_shell_ln_exit (rtems_shell_ln_globals* globals, int code) |
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| 98 | { |
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| 99 | globals->exit_code = code; |
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| 100 | longjmp (globals->exit_jmp, 1); |
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| 101 | } |
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| 102 | |
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| 103 | static int main_ln(rtems_shell_ln_globals* globals, int argc, char *argv[]); |
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| 104 | |
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[3421e520] | 105 | static int rtems_shell_main_ln(int argc, char *argv[]) |
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[eb649786] | 106 | { |
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| 107 | rtems_shell_ln_globals ln_globals; |
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| 108 | rtems_shell_ln_globals* globals = &ln_globals; |
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| 109 | memset (globals, 0, sizeof (ln_globals)); |
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| 110 | ln_globals.exit_code = 1; |
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| 111 | if (setjmp (ln_globals.exit_jmp) == 0) |
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| 112 | return main_ln (globals, argc, argv); |
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| 113 | return ln_globals.exit_code; |
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| 114 | } |
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| 115 | |
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| 116 | #if RTEMS_REMOVED |
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| 117 | int fflag; /* Unlink existing files. */ |
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| 118 | int hflag; /* Check new name for symlink first. */ |
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| 119 | int iflag; /* Interactive mode. */ |
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| 120 | int sflag; /* Symbolic, not hard, link. */ |
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| 121 | int vflag; /* Verbose output */ |
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| 122 | |
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| 123 | /* System link call. */ |
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| 124 | int (*linkf)(const char *, const char *); |
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| 125 | char linkch; |
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| 126 | #endif |
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| 127 | |
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| 128 | int (*linkf)(const char *, const char *); |
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| 129 | |
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| 130 | static int linkit(rtems_shell_ln_globals* , const char *, const char *, int); |
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| 131 | static void usage(rtems_shell_ln_globals* ); |
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| 132 | |
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| 133 | static int |
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| 134 | main_ln(rtems_shell_ln_globals* globals, int argc, char *argv[]) |
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| 135 | { |
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| 136 | struct stat sb; |
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| 137 | int ch, exitval; |
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| 138 | char *sourcedir; |
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| 139 | |
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| 140 | struct getopt_data getopt_reent; |
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| 141 | memset(&getopt_reent, 0, sizeof(getopt_data)); |
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| 142 | |
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| 143 | #if RTEMS_REMOVED |
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| 144 | setprogname(argv[0]); |
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| 145 | (void)setlocale(LC_ALL, ""); |
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| 146 | #endif |
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[0893220] | 147 | |
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[eb649786] | 148 | while ((ch = getopt_r(argc, argv, "fhinsv", &getopt_reent)) != -1) |
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| 149 | switch (ch) { |
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| 150 | case 'f': |
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| 151 | fflag = 1; |
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| 152 | iflag = 0; |
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| 153 | break; |
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| 154 | case 'h': |
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| 155 | case 'n': |
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| 156 | hflag = 1; |
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| 157 | break; |
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| 158 | case 'i': |
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| 159 | iflag = 1; |
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| 160 | fflag = 0; |
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| 161 | break; |
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| 162 | case 's': |
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| 163 | sflag = 1; |
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| 164 | break; |
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[0893220] | 165 | case 'v': |
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[eb649786] | 166 | vflag = 1; |
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| 167 | break; |
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| 168 | case '?': |
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| 169 | default: |
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| 170 | usage(globals); |
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| 171 | /* NOTREACHED */ |
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| 172 | } |
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| 173 | |
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| 174 | argv += getopt_reent.optind; |
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| 175 | argc -= getopt_reent.optind; |
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| 176 | |
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| 177 | if (sflag) { |
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| 178 | linkf = symlink; |
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| 179 | linkch = '-'; |
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| 180 | } else { |
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| 181 | linkf = link; |
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| 182 | linkch = '='; |
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| 183 | } |
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| 184 | |
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| 185 | switch(argc) { |
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| 186 | case 0: |
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| 187 | usage(globals); |
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| 188 | /* NOTREACHED */ |
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| 189 | case 1: /* ln target */ |
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| 190 | exit(linkit(globals, argv[0], ".", 1)); |
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| 191 | /* NOTREACHED */ |
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| 192 | case 2: /* ln target source */ |
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| 193 | exit(linkit(globals, argv[0], argv[1], 0)); |
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| 194 | /* NOTREACHED */ |
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| 195 | } |
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| 196 | |
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| 197 | /* ln target1 target2 directory */ |
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| 198 | sourcedir = argv[argc - 1]; |
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| 199 | if (hflag && lstat(sourcedir, &sb) == 0 && S_ISLNK(sb.st_mode)) { |
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| 200 | /* we were asked not to follow symlinks, but found one at |
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| 201 | the target--simulate "not a directory" error */ |
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| 202 | errno = ENOTDIR; |
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| 203 | err(exit_jump, EXIT_FAILURE, "%s", sourcedir); |
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| 204 | /* NOTREACHED */ |
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| 205 | } |
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| 206 | if (stat(sourcedir, &sb)) { |
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| 207 | err(exit_jump, EXIT_FAILURE, "%s", sourcedir); |
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| 208 | /* NOTREACHED */ |
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| 209 | } |
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| 210 | if (!S_ISDIR(sb.st_mode)) { |
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| 211 | usage(globals); |
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| 212 | /* NOTREACHED */ |
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| 213 | } |
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| 214 | for (exitval = 0; *argv != sourcedir; ++argv) |
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| 215 | exitval |= linkit(globals, *argv, sourcedir, 1); |
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| 216 | exit(exitval); |
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| 217 | /* NOTREACHED */ |
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| 218 | return 0; |
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| 219 | } |
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| 220 | |
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| 221 | int |
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| 222 | linkit(rtems_shell_ln_globals* globals, const char *source, const char *target, int isdir) |
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| 223 | { |
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| 224 | struct stat sb; |
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| 225 | const char *p; |
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| 226 | char path[MAXPATHLEN]; |
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| 227 | int ch, exists, first; |
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| 228 | |
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| 229 | if (!sflag) { |
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| 230 | /* If target doesn't exist, quit now. */ |
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| 231 | if (stat(target, &sb)) { |
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| 232 | warn("%s", target); |
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| 233 | return (1); |
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| 234 | } |
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| 235 | } |
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| 236 | |
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| 237 | /* If the source is a directory (and not a symlink if hflag), |
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| 238 | append the target's name. */ |
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| 239 | if (isdir || |
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| 240 | (!lstat(source, &sb) && S_ISDIR(sb.st_mode)) || |
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| 241 | (!hflag && !stat(source, &sb) && S_ISDIR(sb.st_mode))) { |
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| 242 | if ((p = strrchr(target, '/')) == NULL) |
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| 243 | p = target; |
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| 244 | else |
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| 245 | ++p; |
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| 246 | (void)snprintf(path, sizeof(path), "%s/%s", source, p); |
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| 247 | source = path; |
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| 248 | } |
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| 249 | |
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| 250 | exists = !lstat(source, &sb); |
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| 251 | |
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| 252 | /* |
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| 253 | * If the file exists, then unlink it forcibly if -f was specified |
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| 254 | * and interactively if -i was specified. |
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| 255 | */ |
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| 256 | if (fflag && exists) { |
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| 257 | if (unlink(source)) { |
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| 258 | warn("%s", source); |
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| 259 | return (1); |
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| 260 | } |
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| 261 | } else if (iflag && exists) { |
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| 262 | fflush(stdout); |
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| 263 | (void)fprintf(stderr, "replace %s? ", source); |
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| 264 | |
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| 265 | first = ch = getchar(); |
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| 266 | while (ch != '\n' && ch != EOF) |
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| 267 | ch = getchar(); |
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| 268 | if (first != 'y' && first != 'Y') { |
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| 269 | (void)fprintf(stderr, "not replaced\n"); |
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| 270 | return (1); |
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| 271 | } |
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| 272 | |
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| 273 | if (unlink(source)) { |
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| 274 | warn("%s", source); |
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| 275 | return (1); |
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| 276 | } |
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| 277 | } |
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| 278 | |
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| 279 | /* Attempt the link. */ |
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| 280 | if ((*linkf)(target, source)) { |
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| 281 | warn("%s", source); |
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| 282 | return (1); |
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| 283 | } |
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| 284 | if (vflag) |
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| 285 | (void)printf("%s %c> %s\n", source, linkch, target); |
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| 286 | |
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| 287 | return (0); |
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| 288 | } |
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| 289 | |
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| 290 | void |
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| 291 | usage(rtems_shell_ln_globals* globals) |
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| 292 | { |
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| 293 | #define getprogname() "ln" |
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| 294 | (void)fprintf(stderr, |
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| 295 | "usage:\t%s [-fhinsv] file1 file2\n\t%s [-fhinsv] file ... directory\n", |
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| 296 | getprogname(), getprogname()); |
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| 297 | exit(1); |
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| 298 | /* NOTREACHED */ |
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| 299 | } |
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| 300 | |
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| 301 | rtems_shell_cmd_t rtems_shell_LN_Command = { |
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| 302 | "ln", /* name */ |
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| 303 | "ln ln [-fhinsv] source_file [target_file]", /* usage */ |
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| 304 | "files", /* topic */ |
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| 305 | rtems_shell_main_ln, /* command */ |
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| 306 | NULL, /* alias */ |
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| 307 | NULL /* next */ |
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| 308 | }; |
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