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/*
* gen_uuid.c --- generate a DCE-compatible uuid
*
* Copyright (C) 1999, Andreas Dilger and Theodore Ts'o
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include "uuid.h"
#include "nls.h"
#include "c.h"
#include "closestream.h"
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Create a new UUID value.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -r, --random generate random-based uuid\n"), out);
fputs(_(" -t, --time generate time-based uuid\n"), out);
fputs(_(" -n, --namespace ns generate hash-based uuid in this namespace\n"), out);
fputs(_(" -N, --name name generate hash-based uuid from this name\n"), out);
fputs(_(" -m, --md5 generate md5 hash\n"), out);
fputs(_(" -s, --sha1 generate sha1 hash\n"), out);
fputs(_(" -x, --hex interpret name as hex string\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(18));
printf(USAGE_MAN_TAIL("uuidgen(1)"));
exit(EXIT_SUCCESS);
}
static char *unhex(const char *value, size_t *valuelen)
{
char c, *value2;
unsigned n, x;
if (*valuelen % 2 != 0) {
badstring:
fprintf(stderr, "%s: not a valid hex string\n", program_invocation_short_name);
errtryhelp(EXIT_FAILURE);
}
value2 = malloc(*valuelen / 2 + 1);
for (x = n = 0; n < *valuelen; n++) {
c = value[n];
if ('0' <= c && c <= '9')
x += c - '0';
else if (('a' <= c && c <= 'f') || ('A' <= c && c <= 'F'))
x += (c - 'A' + 10) & 0xf;
else
goto badstring;
if (n % 2 == 0)
x *= 16;
else {
value2[n / 2] = x;
x = 0;
}
}
value2[n / 2] = '\0';
*valuelen = (n / 2);
return value2;
}
int
main (int argc, char *argv[])
{
int c;
int do_type = 0, is_hex = 0;
char str[UUID_STR_LEN];
char *namespace = NULL, *name = NULL;
size_t namelen = 0;
uuid_t ns, uu;
static const struct option longopts[] = {
{"random", no_argument, NULL, 'r'},
{"time", no_argument, NULL, 't'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{"namespace", required_argument, NULL, 'n'},
{"name", required_argument, NULL, 'N'},
{"md5", no_argument, NULL, 'm'},
{"sha1", no_argument, NULL, 's'},
{"hex", no_argument, NULL, 'x'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((c = getopt_long(argc, argv, "rtVhn:N:msx", longopts, NULL)) != -1)
switch (c) {
case 't':
do_type = UUID_TYPE_DCE_TIME;
break;
case 'r':
do_type = UUID_TYPE_DCE_RANDOM;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
case 'n':
namespace = optarg;
break;
case 'N':
name = optarg;
break;
case 'm':
do_type = UUID_TYPE_DCE_MD5;
break;
case 's':
do_type = UUID_TYPE_DCE_SHA1;
break;
case 'x':
is_hex = 1;
break;
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
if (namespace) {
if (!name) {
fprintf(stderr, "%s: --namespace requires --name argument\n", program_invocation_short_name);
errtryhelp(EXIT_FAILURE);
}
if (do_type != UUID_TYPE_DCE_MD5 && do_type != UUID_TYPE_DCE_SHA1) {
fprintf(stderr, "%s: --namespace requires --md5 or --sha1\n", program_invocation_short_name);
errtryhelp(EXIT_FAILURE);
}
} else {
if (name) {
fprintf(stderr, "%s: --name requires --namespace argument\n", program_invocation_short_name);
errtryhelp(EXIT_FAILURE);
}
if (do_type == UUID_TYPE_DCE_MD5 || do_type == UUID_TYPE_DCE_SHA1) {
fprintf(stderr, "%s: --md5 or --sha1 require --namespace\n", program_invocation_short_name);
errtryhelp(EXIT_FAILURE);
}
}
if (name) {
namelen = strlen(name);
if (is_hex)
name = unhex(name, &namelen);
}
switch (do_type) {
case UUID_TYPE_DCE_TIME:
uuid_generate_time(uu);
break;
case UUID_TYPE_DCE_RANDOM:
uuid_generate_random(uu);
break;
case UUID_TYPE_DCE_MD5:
case UUID_TYPE_DCE_SHA1:
if (namespace[0] == '@' && namespace[1] != '\0') {
const uuid_t *uuidptr;
uuidptr = uuid_get_template(&namespace[1]);
if (uuidptr == NULL) {
fprintf(stderr, "%s: unknown namespace alias '%s'\n", program_invocation_short_name, namespace);
errtryhelp(EXIT_FAILURE);
}
memcpy(ns, *uuidptr, sizeof(ns));
} else {
if (uuid_parse(namespace, ns) != 0) {
fprintf(stderr, "%s: invalid uuid for namespace '%s'\n", program_invocation_short_name, namespace);
errtryhelp(EXIT_FAILURE);
}
}
if (do_type == UUID_TYPE_DCE_MD5)
uuid_generate_md5(uu, ns, name, namelen);
else
uuid_generate_sha1(uu, ns, name, namelen);
break;
default:
uuid_generate(uu);
break;
}
uuid_unparse(uu, str);
printf("%s\n", str);
if (is_hex)
free(name);
return EXIT_SUCCESS;
}
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