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/*
* $Id: gfsched.c 4813 2010-06-29 17:01:43Z tatebe $
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <libgen.h>
#include <string.h>
#include <limits.h>
#include <gfarm/gfarm.h>
#include "gfm_client.h"
#include "gfm_schedule.h"
#include "schedule.h"
/*
* Create a hostfile.
*
* gfsched -f <file> [-D <domain>] [-n <number>] [-LMlw]
* gfsched [-P <path>] [-D <domain>] [-n <number>] [-LMlw]
*/
char *program_name = "gfsched";
void
usage(void)
{
fprintf(stderr,
"Usage:\t%s [-P <path>] [-D <domain>] [-n <number>] [-LMlw]\n",
program_name);
fprintf(stderr,
"\t%s -f <file> [-D <domain>] [-n <number>] [-LMlw]\n",
program_name);
fprintf(stderr,
"options:\n");
fprintf(stderr, "\t-w\t\twrite mode\n");
exit(2);
}
long
parse_opt_long(char *option, int option_char, char *argument_name)
{
long value;
char *s;
errno = 0;
value = strtol(option, &s, 0);
if (s == option) {
fprintf(stderr, "%s: missing %s after -%c\n",
program_name, argument_name, option_char);
usage();
} else if (*s != '\0') {
fprintf(stderr, "%s: garbage in -%c %s\n",
program_name, option_char, option);
usage();
} else if (errno != 0 && (value == LONG_MIN || value == LONG_MAX)) {
fprintf(stderr, "%s: %s with -%c %s\n",
program_name, strerror(errno), option_char, option);
usage();
}
return (value);
}
int
main(int argc, char **argv)
{
gfarm_error_t e;
char *opt_domain = "";
char *opt_mount_point = NULL;
char *opt_file = NULL;
int opt_metadata_only = 0;
int opt_long_format = 0;
int opt_nhosts = 0;
int opt_write_mode = 0;
int c, i, available_nhosts, nhosts, *ports;
struct gfarm_host_sched_info *available_hosts;
char *path, **hosts;
if (argc >= 1)
program_name = basename(argv[0]);
e = gfarm_initialize(&argc, &argv);
if (e != GFARM_ERR_NO_ERROR) {
fprintf(stderr, "%s: %s\n", program_name,
gfarm_error_string(e));
exit(1);
}
while ((c = getopt(argc, argv, "D:LMP:f:ln:w")) != -1) {
switch (c) {
case 'D':
opt_domain = optarg;
break;
case 'L':
gfarm_schedule_search_mode_use_loadavg();
break;
case 'M':
opt_metadata_only = 1;
break;
case 'P':
opt_mount_point = optarg;
break;
case 'f':
opt_file = optarg;
break;
case 'l':
opt_long_format = 1;
break;
case 'n':
opt_nhosts = parse_opt_long(optarg, c, "<nhosts>");
if (opt_nhosts <= 0) {
fprintf(stderr, "%s: invalid value: -%c %d\n",
program_name, c, opt_nhosts);
usage();
}
break;
case 'w':
opt_write_mode = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
if (opt_mount_point != NULL && opt_file != NULL) {
fprintf(stderr,
"%s: -P and -f option cannot be specified at once.\n",
program_name);
usage();
}
if (opt_file != NULL) {
path = opt_file;
e = gfarm_schedule_hosts_domain_by_file(path,
opt_write_mode ? GFARM_FILE_RDWR : GFARM_FILE_RDONLY,
opt_domain,
&available_nhosts, &available_hosts);
} else {
path = opt_mount_point == NULL ? "/" : opt_mount_point;
e = gfarm_schedule_hosts_domain_all(path, opt_domain,
&available_nhosts, &available_hosts);
}
if (e != GFARM_ERR_NO_ERROR) {
fprintf(stderr, "%s: metadata scheduling: %s\n",
program_name, gfarm_error_string(e));
exit(1);
}
nhosts = opt_nhosts > 0 ? opt_nhosts : available_nhosts;
GFARM_MALLOC_ARRAY(hosts, nhosts);
GFARM_MALLOC_ARRAY(ports, nhosts);
if (hosts == NULL || ports == NULL) {
fprintf(stderr, "%s: cannot allocate memory for %d hosts.\n",
program_name, nhosts);
exit(1);
}
if (opt_metadata_only) {
if (nhosts > available_nhosts)
nhosts = available_nhosts;
for (i = 0; i < nhosts; i++) {
hosts[i] = available_hosts[i].host;
ports[i] = available_hosts[i].port;
}
} else if (opt_write_mode) {
e = gfarm_schedule_hosts_acyclic_to_write(path,
available_nhosts, available_hosts,
&nhosts, hosts, ports);
} else {
e = gfarm_schedule_hosts_acyclic(path,
available_nhosts, available_hosts,
&nhosts, hosts, ports);
}
if (e != GFARM_ERR_NO_ERROR) {
fprintf(stderr, "%s: client side scheduling: %s\n",
program_name, gfarm_error_string(e));
exit(1);
}
for (i = 0; i < nhosts; i++) {
printf("%s", hosts[i]);
if (opt_long_format)
printf("\t%d", ports[i]);
putchar('\n');
}
e = gfarm_terminate();
if (e != GFARM_ERR_NO_ERROR) {
fprintf(stderr, "%s: %s\n",
program_name, gfarm_error_string(e));
exit(1);
}
exit(0);
}
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