chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 *
 * ./sysconf_limits
 *
 * Sample output
 * ---------------------------------------------------------------------------
 * _SC_ARG_MAX value is 131072

chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 *
 *
 */

#include <errno.h>
#include <stdarg.h>

chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 *
 * TZ environment variable affects ctime(), mktime(), localtime() and
 * strftime()
 *
 * Sample outputs
 * --------------------------------------------------------------------------

chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 * strptime example listing 10-3 of LPI book
 */

#define _XOPEN_SOURCE
#define BUF_SIZE 1000

chaitanyav

/*
 *  Author: NagaChaitanya Vellanki
 *
 *see listing 10-2 of LPI book
 */

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 *
 *
 * uptime command implementation
 */

#include <errno.h>

chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 * Refer to Listing 8-2 of LPI book
 *
 * Authenticate user against the /etc/shadow
 * gcc -Wall -pedantic -o check_user_password check_user_password.c -lcrypt
 *
 * sudo ./check_user_password

chaitanyav

/*
 * Author: NagaChaitanya Vellanki
 *
 *
 * Read entries in the groups file one at a time
 */

#include <grp.h>
#include <stdio.h>

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/*
 * Author: NagaChaitanya Vellanki
 *
 *
 * ./read_group_file sys 0
 *
 *  sample output
 *  ---------------------

chaitanyav

/*
 *
 * Author: NagaChaitanya Vellanki
 *
 *
 * Read entries in the passwd one at a time using getpwent
 */

#include <pwd.h>