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label.c revision 1.26 
      1 /*-
      2  * Copyright (c) 2005 Marcel Moolenaar
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #if HAVE_NBTOOL_CONFIG_H
     28 #include "nbtool_config.h"
     29 #endif
     30 
     31 #include <sys/cdefs.h>
     32 #ifdef __FBSDID
     33 __FBSDID("$FreeBSD: src/sbin/gpt/label.c,v 1.3 2006/10/04 18:20:25 marcel Exp $");
     34 #endif
     35 #ifdef __RCSID
     36 __RCSID("$NetBSD: label.c,v 1.26 2015/12/03 21:48:12 christos Exp $");
     37 #endif
     38 
     39 #include <sys/types.h>
     40 
     41 #include <err.h>
     42 #include <stddef.h>
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 #include <unistd.h>
     47 
     48 #include "map.h"
     49 #include "gpt.h"
     50 #include "gpt_private.h"
     51 #include "gpt_uuid.h"
     52 
     53 static int cmd_label(gpt_t, int, char *[]);
     54 
     55 static const char *labelhelp[] = {
     56 	"-a <-l label | -f file>",
     57 	"[-b blocknr] [-i index] [-L label] [-s sectors] [-t uuid] "
     58 	    "<-l label | -f file>",
     59 };
     60 
     61 struct gpt_cmd c_label = {
     62 	"label",
     63 	cmd_label,
     64 	labelhelp, __arraycount(labelhelp),
     65 	0,
     66 };
     67 
     68 #define usage() gpt_usage(NULL, &c_label)
     69 
     70 static void
     71 change(struct gpt_ent *ent, void *v)
     72 {
     73 	uint8_t *name = v;
     74 	utf8_to_utf16(name, ent->ent_name, __arraycount(ent->ent_name));
     75 }
     76 
     77 static int
     78 name_from_file(gpt_t gpt, void *v)
     79 {
     80 	FILE *f;
     81 	char *p;
     82 	size_t maxlen = 1024;
     83 	size_t len;
     84 	const char *fn = optarg;
     85 	char **name = v;
     86 
     87 	if (*name != NULL)
     88 		return -1;
     89 
     90 	if (strcmp(fn, "-") != 0) {
     91 		f = fopen(fn, "r");
     92 		if (f == NULL) {
     93 			gpt_warn(gpt, "Can't open `%s'", fn);
     94 			return -1;
     95 		}
     96 	} else
     97 		f = stdin;
     98 
     99 	if ((*name = malloc(maxlen)) == NULL) {
    100 		gpt_warn(gpt, "Can't copy string");
    101 		goto cleanup;
    102 	}
    103 	len = fread(*name, 1, maxlen - 1, f);
    104 	if (ferror(f)) {
    105 		gpt_warn(gpt, "Can't label from `%s'", fn);
    106 		goto cleanup;
    107 	}
    108 	if (f != stdin)
    109 		fclose(f);
    110 	(*name)[len] = '\0';
    111 	/* Only keep the first line, excluding the newline character. */
    112 	p = strchr(*name, '\n');
    113 	if (p != NULL)
    114 		*p = '\0';
    115 	return 0;
    116 cleanup:
    117 	free(*name);
    118 	if (f != stdin)
    119 		fclose(f);
    120 	return -1;
    121 }
    122 
    123 static int
    124 cmd_label(gpt_t gpt, int argc, char *argv[])
    125 {
    126 	int ch;
    127 	struct gpt_find find;
    128 	char *name = NULL;
    129 
    130 	memset(&find, 0, sizeof(find));
    131 	find.msg = "label changed";
    132 
    133 	/* Get the label options */
    134 	while ((ch = getopt(argc, argv, GPT_FIND "f:l:")) != -1) {
    135 		switch(ch) {
    136 		case 'f':
    137 			if (name_from_file(gpt, &name) == -1)
    138 				return usage();
    139 			break;
    140 		case 'l':
    141 			if (gpt_name_get(gpt, &name) == -1)
    142 				return usage();
    143 			break;
    144 		default:
    145 			if (gpt_add_find(gpt, &find, ch) == -1)
    146 				return usage();
    147 			break;
    148 		}
    149 	}
    150 
    151 	if (name == NULL || argc != optind)
    152 		return usage();
    153 
    154 	return gpt_change_ent(gpt, &find, change, name);
    155 }
    156