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/*
* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <config.h>
#include <crm_internal.h>
#include <sys/param.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <clplumbing/lsb_exitcodes.h>
#include <clplumbing/cl_log.h>
#include <clplumbing/cl_uuid.h>
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif
#define UUID_LEN 16
#define OPTARGS "?rw:"
int read_local_hb_uuid(void);
int write_local_hb_uuid(const char *buffer);
static void usage(int rc)
{
FILE *stream = rc != 0 ? stderr : stdout;
fprintf(stream, "crm_uuid [-r|-w new_ascii_value]\n");
exit(rc);
}
int
main(int argc, char **argv)
{
int flag;
int rc = 0;
if(argc == 1) {
/* no arguments specified, default to read */
rc = read_local_hb_uuid();
return rc;
}
cl_log_args(argc, argv);
while (1) {
flag = getopt(argc, argv, OPTARGS);
if (flag == -1) {
break;
}
switch(flag) {
case 'r':
rc = read_local_hb_uuid();
break;
case 'w':
rc = write_local_hb_uuid(optarg);
break;
case '?':
usage(LSB_EXIT_OK);
break;
default:
usage(LSB_EXIT_GENERIC);
break;
}
}
return rc;
}
int
read_local_hb_uuid(void)
{
int rc = 0;
cl_uuid_t uuid;
char *buffer = NULL;
long start = 0, read_len = 0;
FILE *input = fopen(UUID_FILE, "r");
if(input == NULL) {
cl_perror("Could not open UUID file %s\n", UUID_FILE);
return 1;
}
/* see how big the file is */
start = ftell(input);
fseek(input, 0L, SEEK_END);
if(UUID_LEN != ftell(input)) {
fprintf(stderr, "%s must contain exactly %d bytes\n",
UUID_FILE, UUID_LEN);
abort();
}
fseek(input, 0L, start);
if(start != ftell(input)) {
fprintf(stderr, "fseek not behaving: %ld vs. %ld\n",
start, ftell(input));
rc = 2;
goto bail;
}
/* fprintf(stderr, "Reading %d bytes from: %s\n", UUID_LEN, UUID_FILE); */
buffer = malloc(50);
read_len = fread(uuid.uuid, 1, UUID_LEN, input);
if(read_len != UUID_LEN) {
fprintf(stderr, "Expected and read bytes differ: %d vs. %ld\n",
UUID_LEN, read_len);
rc = 3;
goto bail;
} else if(buffer != NULL) {
cl_uuid_unparse(&uuid, buffer);
fprintf(stdout, "%s\n", buffer);
} else {
fprintf(stderr, "No buffer to unparse\n");
rc = 4;
}
bail:
free(buffer);
fclose(input);
return rc;
}
int
write_local_hb_uuid(const char *new_value)
{
int fd;
int rc = 0;
cl_uuid_t uuid;
char *buffer = strdup(new_value);
rc = cl_uuid_parse(buffer, &uuid);
if(rc != 0) {
fprintf(stderr, "Invalid ASCII UUID supplied: [%s]\n", new_value);
fprintf(stderr, "ASCII UUIDs must be of the form"
" XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
" and contain only letters and digits\n");
return 5;
}
if ((fd = open(UUID_FILE, O_WRONLY|O_SYNC|O_CREAT, 0644)) < 0) {
cl_perror("Could not open %s", UUID_FILE);
return 6;
}
if (write(fd, uuid.uuid, UUID_LEN) != UUID_LEN) {
cl_perror("Could not write UUID to %s", UUID_FILE);
rc=7;
}
if (close(fd) < 0) {
cl_perror("Could not close %s", UUID_FILE);
rc=8;
}
return rc;
}
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