source: mainline/uspace/app/bdsh/cmds/modules/alias/alias.c@ 4bf08aa5

/* Automatically generated by mknewcmd on Don Nov 29 19:01:45 CET 2018
 * This is machine generated output. The author of mknewcmd claims no
 * copyright over the contents of this file. Where legally permitted, the
 * contents herein are donated to the public domain.
 *
 * You should apply any license and copyright that you wish to this file,
 * replacing this header in its entirety. */

#include <stdio.h>
#include <stdlib.h>
#include <str.h>
#include "config.h"
#include "util.h"
#include "errors.h"
#include "entry.h"
#include "alias.h"
#include "cmds.h"

#include <adt/odict.h>


static const char *cmdname = "alias";
static const char* alias_format = "%s='%s'\n";



static void list_aliases()
{
        odlink_t *alias_link = odict_first(&alias_dict);
        while (alias_link != NULL) {
                alias_t *data = odict_get_instance(alias_link, alias_t, odict);

                printf(alias_format, data->name, data->value);

                alias_link = odict_next(alias_link, &alias_dict);
        }
}


static int print_alias(const char* name)
{
        odlink_t *alias_link = odict_find_eq(&alias_dict, (void*)name, NULL);
        if (alias_link != NULL) {
                alias_t* data = odict_get_instance(alias_link, alias_t, odict);
                printf(alias_format, data->name, data->value);
                return CMD_SUCCESS;
        }



        printf("%s: No alias with the name '%s' exists\n", cmdname, name);
        return CMD_FAILURE;
}


static void set_alias(const char* name, const char* value)
{
        odlink_t *alias_link = odict_find_eq(&alias_dict, (void*)name, NULL);

        if (alias_link != NULL) {
                //update existing value
                alias_t* data = odict_get_instance(alias_link, alias_t, odict);
                free(data->value);
                data->value = str_dup(value);

                printf("%s: update value ", cmdname);
        }else {
                //add new value
                alias_t* data = (alias_t*)calloc(1, sizeof(alias_t));
                data->name = str_dup(name);
                data->value = str_dup(value);

                odict_insert(&data->odict, &alias_dict, NULL);


                printf("%s: insert value ", cmdname);
        }

        printf(alias_format, name, value);
}





/* Dispays help for alias in various levels */
void help_cmd_alias(unsigned int level)
{
        printf("Set a new alias with \"alias hex='cat --hex'\". Display an alias with \"alias hex\". List all alias by passing no argument.\n");
        return;
}

/* Main entry point for alias, accepts an array of arguments */
int cmd_alias(char **argv)
{
        
        if (argv[1] == NULL) {
                list_aliases();
                return CMD_SUCCESS;
        }else if (argv[2] == NULL && str_chr(argv[1], '=') == NULL) {
                return print_alias(argv[1]);
        }
        
        //concat all it together
        char* str = (char*)malloc(INPUT_MAX * sizeof(char));
        str[0] = '\0';

        size_t i;
        for (i = 1; argv[i] != NULL; i++) {
                str_append(str, INPUT_MAX - 1, argv[i]);
        }

        //split input
        char* pos = str_chr(str, '=');
        if(pos == NULL) {
                printf("%s: bad formatted input\n", cmdname);
                return CMD_FAILURE;
        }


        str[pos - str] = '\0';
        set_alias(str, pos + 1);

        free(str);
        return CMD_SUCCESS;
}