/
cli-cmd-parser.c
4458 lines (3832 loc) · 148 KB
/
cli-cmd-parser.c
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/*
Copyright (c) 2010-2013 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <pthread.h>
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "cli.h"
#include "cli-cmd.h"
#include "cli-mem-types.h"
#include "dict.h"
#include "protocol-common.h"
#include "cli1-xdr.h"
#define MAX_SNAP_DESCRIPTION_LEN 1024
struct snap_config_opt_vals_ snap_confopt_vals[] = {
{.op_name = "snap-max-hard-limit",
.question = "Changing snapshot-max-hard-limit "
"will lead to deletion of snapshots "
"if they exceed the new limit.\n"
"Do you want to continue?"
},
{.op_name = "snap-max-soft-limit",
.question = "Changing snapshot-max-soft-limit "
"will lead to deletion of snapshots "
"if they exceed the new limit.\n"
"Do you want to continue?"
},
{.op_name = "both",
.question = "Changing snapshot-max-hard-limit & "
"snapshot-max-soft-limit will lead to "
"deletion of snapshots if they exceed "
"the new limit.\nDo you want to continue?"
},
{.op_name = NULL,
}
};
enum cli_snap_config_set_types {
GF_SNAP_CONFIG_SET_HARD = 0,
GF_SNAP_CONFIG_SET_SOFT = 1,
GF_SNAP_CONFIG_SET_BOTH = 2,
};
typedef enum cli_snap_config_set_types cli_snap_config_set_types;
static const char *
id_sel (void *wcon)
{
return (const char *)wcon;
}
static char *
str_getunamb (const char *tok, char **opwords)
{
return (char *)cli_getunamb (tok, (void **)opwords, id_sel);
}
int32_t
cli_cmd_bricks_parse (const char **words, int wordcount, int brick_index,
char **bricks, int *brick_count)
{
int ret = 0;
char *tmp_list = NULL;
char brick_list[120000] = {0,};
char *space = " ";
char *delimiter = NULL;
char *host_name = NULL;
char *free_list_ptr = NULL;
char *tmpptr = NULL;
int j = 0;
int brick_list_len = 0;
char *tmp_host = NULL;
GF_ASSERT (words);
GF_ASSERT (wordcount);
GF_ASSERT (bricks);
GF_ASSERT (brick_index > 0);
GF_ASSERT (brick_index < wordcount);
strncpy (brick_list, space, strlen (space));
brick_list_len++;
while (brick_index < wordcount) {
if (validate_brick_name ((char *)words[brick_index])) {
cli_err ("Wrong brick type: %s, use <HOSTNAME>:"
"<export-dir-abs-path>", words[brick_index]);
ret = -1;
goto out;
} else {
delimiter = strrchr (words[brick_index], ':');
ret = gf_canonicalize_path (delimiter + 1);
if (ret)
goto out;
}
if ((brick_list_len + strlen (words[brick_index]) + 1) > sizeof (brick_list)) {
cli_err ("Total brick list is larger than a request. "
"Can take (brick_count %d)", *brick_count);
ret = -1;
goto out;
}
tmp_host = gf_strdup ((char *)words[brick_index]);
if (!tmp_host) {
gf_log ("cli", GF_LOG_ERROR, "Out of memory");
ret = -1;
goto out;
}
get_host_name (tmp_host, &host_name);
if (!host_name) {
ret = -1;
gf_log("cli",GF_LOG_ERROR, "Unable to allocate "
"memory");
goto out;
}
if (!(strcmp (host_name, "localhost") &&
strcmp (host_name, "127.0.0.1") &&
strncmp (host_name, "0.", 2))) {
cli_err ("Please provide a valid hostname/ip other "
"than localhost, 127.0.0.1 or loopback "
"address (0.0.0.0 to 0.255.255.255).");
ret = -1;
GF_FREE (tmp_host);
goto out;
}
if (!valid_internet_address (host_name, _gf_false)) {
cli_err ("internet address '%s' does not conform to "
"standards", host_name);
}
GF_FREE (tmp_host);
tmp_list = gf_strdup (brick_list + 1);
if (free_list_ptr) {
GF_FREE (free_list_ptr);
free_list_ptr = NULL;
}
free_list_ptr = tmp_list;
j = 0;
while(j < *brick_count) {
strtok_r (tmp_list, " ", &tmpptr);
if (!(strcmp (tmp_list, words[brick_index]))) {
ret = -1;
cli_err ("Found duplicate"
" exports %s",words[brick_index]);
goto out;
}
tmp_list = tmpptr;
j++;
}
strcat (brick_list, words[brick_index]);
strcat (brick_list, " ");
brick_list_len += (strlen (words[brick_index]) + 1);
++(*brick_count);
++brick_index;
}
*bricks = gf_strdup (brick_list);
if (!*bricks)
ret = -1;
out:
GF_FREE (free_list_ptr);
return ret;
}
int32_t
cli_cmd_create_disperse_check (struct cli_state *state, int *disperse,
int *redundancy, int *data, int count)
{
int i = 0;
int tmp = 0;
gf_answer_t answer = GF_ANSWER_NO;
char question[128];
const char *question1 = "There isn't an optimal redundancy value "
"for this configuration. Do you want to "
"create the volume with redundancy 1 ?";
const char *question2 = "The optimal redundancy for this "
"configuration is %d. Do you want to create "
"the volume with this value ?";
const char *question3 = "This configuration is not optimal on most "
"workloads. Do you want to use it ?";
const char *question4 = "Redundancy for this configuration is %d. "
"Do you want to create "
"the volume with this value ?";
if (*data > 0) {
if (*disperse > 0 && *redundancy > 0) {
if (*disperse != (*data + *redundancy)) {
cli_err ("Disperse count(%d) should be equal "
"to sum of disperse-data count(%d) and "
"redundancy count(%d)", *disperse,
*data, *redundancy);
return -1;
}
} else if (*redundancy > 0) {
*disperse = *data + *redundancy;
} else if (*disperse > 0) {
*redundancy = *disperse - *data;
} else {
if ((count - *data) >= *data) {
cli_err ("Please provide redundancy count "
"along with disperse-data count");
return -1;
} else {
sprintf (question, question4, count - *data);
answer = cli_cmd_get_confirmation (state,
question);
if (answer == GF_ANSWER_NO)
return -1;
*redundancy = count - *data;
*disperse = count;
}
}
}
if (*disperse <= 0) {
if (count < 3) {
cli_err ("number of bricks must be greater "
"than 2");
return -1;
}
*disperse = count;
}
if (*redundancy == -1) {
tmp = *disperse - 1;
for (i = tmp / 2;
(i > 0) && ((tmp & -tmp) != tmp);
i--, tmp--);
if (i == 0) {
answer = cli_cmd_get_confirmation(state, question1);
if (answer == GF_ANSWER_NO)
return -1;
*redundancy = 1;
}
else
{
*redundancy = *disperse - tmp;
if (*redundancy > 1) {
sprintf(question, question2, *redundancy);
answer = cli_cmd_get_confirmation(state,
question);
if (answer == GF_ANSWER_NO)
return -1;
}
}
tmp = 0;
} else {
tmp = *disperse - *redundancy;
}
if (*redundancy > (*disperse - 1) / 2) {
cli_err ("redundancy must be less than %d for a "
"disperse %d volume",
(*disperse + 1) / 2, *disperse);
return -1;
}
if ((tmp & -tmp) != tmp) {
answer = cli_cmd_get_confirmation(state, question3);
if (answer == GF_ANSWER_NO)
return -1;
}
return 0;
}
static int32_t
cli_validate_disperse_volume (char *word, gf1_cluster_type type,
const char **words, int32_t wordcount,
int32_t index, int32_t *disperse_count,
int32_t *redundancy_count,
int32_t *data_count)
{
int ret = -1;
switch (type) {
case GF_CLUSTER_TYPE_NONE:
case GF_CLUSTER_TYPE_DISPERSE:
if (strcmp (word, "disperse") == 0) {
if (*disperse_count >= 0) {
cli_err ("disperse option given twice");
goto out;
}
if (wordcount < (index+2)) {
goto out;
}
ret = gf_string2int (words[index + 1], disperse_count);
if (ret == -1 && errno == EINVAL) {
*disperse_count = 0;
ret = 1;
} else if (ret == -1) {
goto out;
} else {
if (*disperse_count < 3) {
cli_err ("disperse count must "
"be greater than 2");
goto out;
}
ret = 2;
}
} else if (strcmp (word, "disperse-data") == 0) {
if (*data_count >= 0) {
cli_err ("disperse-data option given twice");
goto out;
}
if (wordcount < (index+2)) {
goto out;
}
ret = gf_string2int (words[index+1], data_count);
if (ret == -1 || *data_count < 2) {
cli_err ("disperse-data must be greater than 1");
goto out;
}
ret = 2;
} else if (strcmp (word, "redundancy") == 0) {
if (*redundancy_count >= 0) {
cli_err ("redundancy option given twice");
goto out;
}
if (wordcount < (index+2)) {
goto out;
}
ret = gf_string2int (words[index+1], redundancy_count);
if (ret == -1 || *redundancy_count < 1) {
cli_err ("redundancy must be greater than 0");
goto out;
}
ret = 2;
}
break;
case GF_CLUSTER_TYPE_STRIPE_REPLICATE:
cli_err ("striped-replicated-dispersed volume "
"is not supported");
goto out;
case GF_CLUSTER_TYPE_STRIPE:
cli_err ("striped-dispersed volume is not "
"supported");
goto out;
case GF_CLUSTER_TYPE_REPLICATE:
cli_err ("replicated-dispersed volume is not "
"supported");
goto out;
}
out:
return ret;
}
int32_t
cli_cmd_volume_create_parse (struct cli_state *state, const char **words,
int wordcount, dict_t **options)
{
dict_t *dict = NULL;
char *volname = NULL;
int ret = -1;
gf1_cluster_type type = GF_CLUSTER_TYPE_NONE;
int count = 1;
int sub_count = 1;
int brick_index = 0;
int i = 0;
char *trans_type = NULL;
int32_t index = 0;
char *bricks = NULL;
int32_t brick_count = 0;
char *opwords[] = { "replica", "stripe", "transport", "disperse",
"redundancy", "disperse-data", NULL };
char *invalid_volnames[] = {"volume", "type", "subvolumes", "option",
"end-volume", "all", "volume_not_in_ring",
"description", "force",
"snap-max-hard-limit",
"snap-max-soft-limit", "auto-delete",
"activate-on-create", NULL};
char *w = NULL;
char *ptr = NULL;
int op_count = 0;
int32_t replica_count = 1;
int32_t stripe_count = 1;
int32_t disperse_count = -1;
int32_t redundancy_count = -1;
int32_t disperse_data_count = -1;
gf_boolean_t is_force = _gf_false;
int wc = wordcount;
GF_ASSERT (words);
GF_ASSERT (options);
dict = dict_new ();
if (!dict)
goto out;
if (wordcount < 3)
goto out;
volname = (char *)words[2];
GF_ASSERT (volname);
/* Validate the volume name here itself */
{
if (volname[0] == '-')
goto out;
for (i = 0; invalid_volnames[i]; i++) {
if (!strcmp (volname, invalid_volnames[i])) {
cli_err ("\"%s\" cannot be the name of a volume.",
volname);
goto out;
}
}
if (strchr (volname, '/'))
goto out;
if (strlen (volname) > GD_VOLUME_NAME_MAX) {
cli_err("Volume name exceeds %d characters.",
GD_VOLUME_NAME_MAX);
goto out;
}
for (i = 0; i < strlen (volname); i++)
if (!isalnum (volname[i]) && (volname[i] != '_') &&
(volname[i] != '-')) {
cli_err ("Volume name should not contain \"%c\""
" character.\nVolume names can only"
"contain alphanumeric, '-' and '_' "
"characters.",volname[i]);
goto out;
}
}
if (wordcount < 4) {
ret = -1;
goto out;
}
type = GF_CLUSTER_TYPE_NONE;
index = 3;
while (op_count < 3) {
ret = -1;
w = str_getunamb (words[index], opwords);
if (!w) {
break;
} else if ((strcmp (w, "replica")) == 0) {
switch (type) {
case GF_CLUSTER_TYPE_STRIPE_REPLICATE:
case GF_CLUSTER_TYPE_REPLICATE:
cli_err ("replica option given twice");
goto out;
case GF_CLUSTER_TYPE_NONE:
type = GF_CLUSTER_TYPE_REPLICATE;
break;
case GF_CLUSTER_TYPE_STRIPE:
type = GF_CLUSTER_TYPE_STRIPE_REPLICATE;
break;
case GF_CLUSTER_TYPE_DISPERSE:
cli_err ("replicated-dispersed volume is not "
"supported");
goto out;
}
if (wordcount < (index+2)) {
ret = -1;
goto out;
}
replica_count = strtol (words[index+1], NULL, 0);
if (replica_count < 2) {
cli_err ("replica count should be greater"
" than 1");
ret = -1;
goto out;
}
ret = dict_set_int32 (dict, "replica-count", replica_count);
if (ret)
goto out;
index += 2;
} else if ((strcmp (w, "stripe")) == 0) {
switch (type) {
case GF_CLUSTER_TYPE_STRIPE_REPLICATE:
case GF_CLUSTER_TYPE_STRIPE:
cli_err ("stripe option given twice");
goto out;
case GF_CLUSTER_TYPE_NONE:
type = GF_CLUSTER_TYPE_STRIPE;
break;
case GF_CLUSTER_TYPE_REPLICATE:
type = GF_CLUSTER_TYPE_STRIPE_REPLICATE;
break;
case GF_CLUSTER_TYPE_DISPERSE:
cli_err ("striped-dispersed volume is not "
"supported");
goto out;
}
if (wordcount < (index + 2)) {
ret = -1;
goto out;
}
stripe_count = strtol (words[index+1], NULL, 0);
if (stripe_count < 2) {
cli_err ("stripe count should be greater"
" than 1");
ret = -1;
goto out;
}
ret = dict_set_int32 (dict, "stripe-count", stripe_count);
if (ret)
goto out;
index += 2;
} else if ((strcmp (w, "transport")) == 0) {
if (trans_type) {
cli_err ("'transport' option given more"
" than one time");
goto out;
}
if ((strcasecmp (words[index+1], "tcp") == 0)) {
trans_type = gf_strdup ("tcp");
} else if ((strcasecmp (words[index+1], "rdma") == 0)) {
trans_type = gf_strdup ("rdma");
} else if ((strcasecmp (words[index+1], "tcp,rdma") == 0) ||
(strcasecmp (words[index+1], "rdma,tcp") == 0)) {
trans_type = gf_strdup ("tcp,rdma");
} else {
gf_log ("", GF_LOG_ERROR, "incorrect transport"
" protocol specified");
ret = -1;
goto out;
}
index += 2;
} else if ((strcmp (w, "disperse") == 0) ||
(strcmp (w, "redundancy") == 0) ||
(strcmp (w, "disperse-data") == 0)) {
ret = cli_validate_disperse_volume (w, type, words,
wordcount, index, &disperse_count,
&redundancy_count, &disperse_data_count);
if (ret < 0)
goto out;
index += ret;
type = GF_CLUSTER_TYPE_DISPERSE;
} else {
GF_ASSERT (!"opword mismatch");
ret = -1;
goto out;
}
op_count++;
}
if (!trans_type)
trans_type = gf_strdup ("tcp");
/* reset the count value now */
count = 1;
if (index >= wordcount) {
ret = -1;
goto out;
}
brick_index = index;
if (strcmp (words[wordcount - 1], "force") == 0) {
is_force = _gf_true;
wc = wordcount - 1;
}
ret = cli_cmd_bricks_parse (words, wc, brick_index, &bricks,
&brick_count);
if (ret)
goto out;
/* If brick-count is not valid when replica or stripe is
given, exit here */
if (!brick_count) {
cli_err ("No bricks specified");
ret = -1;
goto out;
}
if (type == GF_CLUSTER_TYPE_DISPERSE) {
ret = cli_cmd_create_disperse_check (state, &disperse_count,
&redundancy_count,
&disperse_data_count,
brick_count);
if (!ret)
ret = dict_set_int32 (dict, "disperse-count",
disperse_count);
if (!ret)
ret = dict_set_int32 (dict, "redundancy-count",
redundancy_count);
if (ret)
goto out;
sub_count = disperse_count;
} else
sub_count = stripe_count * replica_count;
if (brick_count % sub_count) {
if (type == GF_CLUSTER_TYPE_STRIPE)
cli_err ("number of bricks is not a multiple of "
"stripe count");
else if (type == GF_CLUSTER_TYPE_REPLICATE)
cli_err ("number of bricks is not a multiple of "
"replica count");
else if (type == GF_CLUSTER_TYPE_DISPERSE)
cli_err ("number of bricks is not a multiple of "
"disperse count");
else
cli_err ("number of bricks given doesn't match "
"required count");
ret = -1;
goto out;
}
/* Everything is parsed fine. start setting info in dict */
ret = dict_set_str (dict, "volname", volname);
if (ret)
goto out;
ret = dict_set_int32 (dict, "type", type);
if (ret)
goto out;
ret = dict_set_dynstr (dict, "transport", trans_type);
if (ret)
goto out;
trans_type = NULL;
ret = dict_set_dynstr (dict, "bricks", bricks);
if (ret)
goto out;
ret = dict_set_int32 (dict, "count", brick_count);
if (ret)
goto out;
ret = dict_set_int32 (dict, "force", is_force);
if (ret)
goto out;
*options = dict;
out:
if (ret) {
gf_log ("cli", GF_LOG_ERROR, "Unable to parse create volume CLI");
if (dict)
dict_destroy (dict);
}
GF_FREE (trans_type);
return ret;
}
int32_t
cli_cmd_volume_reset_parse (const char **words, int wordcount, dict_t **options)
{
dict_t *dict = NULL;
char *volname = NULL;
int ret = -1;
GF_ASSERT (words);
GF_ASSERT (options);
dict = dict_new ();
if (!dict)
goto out;
if (wordcount < 3)
goto out;
if (wordcount > 5)
goto out;
volname = (char *)words[2];
if (!volname) {
ret = -1;
goto out;
}
ret = dict_set_str (dict, "volname", volname);
if (ret)
goto out;
if (wordcount == 3) {
ret = dict_set_str (dict, "key", "all");
if (ret)
goto out;
}
if (wordcount >= 4) {
if (!strcmp ("force", (char*)words[3])) {
ret = dict_set_int32 (dict, "force", 1);
if (ret)
goto out;
ret = dict_set_str (dict, "key", "all");
if (ret)
goto out;
} else {
ret = dict_set_str (dict, "key", (char *)words[3]);
if (ret)
goto out;
}
}
if (wordcount == 5) {
if (strcmp ("force", (char*)words[4])) {
ret = -1;
goto out;
} else {
ret = dict_set_int32 (dict, "force", 1);
if (ret)
goto out;
}
}
*options = dict;
out:
if (ret && dict) {
dict_destroy (dict);
}
return ret;
}
int32_t
cli_cmd_quota_parse (const char **words, int wordcount, dict_t **options)
{
dict_t *dict = NULL;
char *volname = NULL;
int ret = -1;
int i = 0;
char key[20] = {0, };
uint64_t value = 0;
gf_quota_type type = GF_QUOTA_OPTION_TYPE_NONE;
char *opwords[] = { "enable", "disable", "limit-usage",
"remove", "list", "alert-time",
"soft-timeout", "hard-timeout",
"default-soft-limit", NULL};
char *w = NULL;
uint32_t time = 0;
double percent = 0;
GF_ASSERT (words);
GF_ASSERT (options);
dict = dict_new ();
if (!dict)
goto out;
if (wordcount < 4)
goto out;
volname = (char *)words[2];
if (!volname) {
ret = -1;
goto out;
}
/* Validate the volume name here itself */
{
if (volname[0] == '-')
goto out;
if (!strcmp (volname, "all")) {
cli_err ("\"all\" cannot be the name of a volume.");
goto out;
}
if (strchr (volname, '/'))
goto out;
if (strlen (volname) > GD_VOLUME_NAME_MAX) {
cli_err("Volname can not exceed %d characters.",
GD_VOLUME_NAME_MAX);
goto out;
}
for (i = 0; i < strlen (volname); i++)
if (!isalnum (volname[i]) && (volname[i] != '_') &&
(volname[i] != '-')) {
cli_err ("Volume name should not contain \"%c\""
" character.\nVolume names can only"
"contain alphanumeric, '-' and '_' "
"characters.",volname[i]);
goto out;
}
}
ret = dict_set_str (dict, "volname", volname);
if (ret < 0)
goto out;
w = str_getunamb (words[3], opwords);
if (!w) {
cli_out ("Invalid quota option : %s", words[3]);
ret = - 1;
goto out;
}
if (strcmp (w, "enable") == 0) {
if (wordcount == 4) {
type = GF_QUOTA_OPTION_TYPE_ENABLE;
ret = 0;
goto set_type;
} else {
ret = -1;
goto out;
}
}
if (strcmp (w, "disable") == 0) {
if (wordcount == 4) {
type = GF_QUOTA_OPTION_TYPE_DISABLE;
ret = 0;
goto set_type;
} else {
ret = -1;
goto out;
}
}
if (strcmp (w, "limit-usage") == 0) {
if (wordcount < 6 || wordcount > 7) {
ret = -1;
goto out;
}
type = GF_QUOTA_OPTION_TYPE_LIMIT_USAGE;
if (words[4][0] != '/') {
cli_err ("Please enter absolute path");
ret = -1;
goto out;
}
ret = dict_set_str (dict, "path", (char *) words[4]);
if (ret)
goto out;
if (!words[5]) {
cli_err ("Please enter the limit value to be set");
ret = -1;
goto out;
}
ret = gf_string2bytesize_uint64 (words[5], &value);
if (ret != 0) {
if (errno == ERANGE)
cli_err ("Value too large: %s", words[5]);
else
cli_err ("Please enter a correct value");
goto out;
}
ret = dict_set_str (dict, "hard-limit", (char *) words[5]);
if (ret < 0)
goto out;
if (wordcount == 7) {
ret = gf_string2percent (words[6], &percent);
if (ret != 0) {
cli_err ("Please enter a correct value");
goto out;
}
ret = dict_set_str (dict, "soft-limit",
(char *) words[6]);
if (ret < 0)
goto out;
}
goto set_type;
}
if (strcmp (w, "remove") == 0) {
if (wordcount != 5) {
ret = -1;
goto out;
}
type = GF_QUOTA_OPTION_TYPE_REMOVE;
if (words[4][0] != '/') {
cli_err ("Please enter absolute path");
ret = -1;
goto out;
}
ret = dict_set_str (dict, "path", (char *) words[4]);
if (ret < 0)
goto out;
goto set_type;
}
if (strcmp (w, "list") == 0) {
if (wordcount < 4) {
ret = -1;
goto out;
}
type = GF_QUOTA_OPTION_TYPE_LIST;
i = 4;
while (i < wordcount) {
snprintf (key, 20, "path%d", i-4);
ret = dict_set_str (dict, key, (char *) words [i++]);
if (ret < 0)
goto out;
}
ret = dict_set_int32 (dict, "count", i - 4);
if (ret < 0)
goto out;
goto set_type;
}
if (strcmp (w, "alert-time") == 0) {
if (wordcount != 5) {
ret = -1;
goto out;
}
type = GF_QUOTA_OPTION_TYPE_ALERT_TIME;
ret = gf_string2time (words[4], &time);
if (ret) {
cli_err ("Invalid argument %s. Please enter a valid "
"string", words[4]);
goto out;
}
ret = dict_set_str (dict, "value", (char *)words[4]);
if (ret < 0)
goto out;
goto set_type;
}
if (strcmp (w, "soft-timeout") == 0) {
if (wordcount != 5) {
ret = -1;
goto out;
}
type = GF_QUOTA_OPTION_TYPE_SOFT_TIMEOUT;
ret = gf_string2time (words[4], &time);
if (ret) {
cli_err ("Invalid argument %s. Please enter a valid "
"string", words[4]);
goto out;
}
ret = dict_set_str (dict, "value", (char *)words[4]);
if (ret < 0)
goto out;
goto set_type;
}
if (strcmp (w, "hard-timeout") == 0) {
if(wordcount != 5) {
ret = -1;
goto out;
}
type = GF_QUOTA_OPTION_TYPE_HARD_TIMEOUT;
ret = gf_string2time (words[4], &time);
if (ret) {
cli_err ("Invalid argument %s. Please enter a valid "
"string", words[4]);