others
/* $Id$ */
/* Copyright (c) 2006-2014 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Unix others */
/* 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, version 3 of the License.
*
* This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
#include <stdio.h>
#ifndef PROGNAME
# define PROGNAME "w"
#endif
#include "utmpx.c"
/* w */
/* private */
/* prototypes */
static int _w(void);
static int _w_error(char * message, int ret);
static int _w_usage(void);
/* functions */
/* w */
static int _print_idle(struct timeval * tv, char * device);
static int _print_what(pid_t pid);
static int _w(void)
{
struct utmpx * u;
struct timeval tv;
if(gettimeofday(&tv, NULL) != 0)
return _w_error("gettimeofday", 2);
printf("%-8s %-8s %-16s %-5s %5s %s\n", "USER", "TTY", "FROM",
"LOGIN@", "IDLE", "WHAT");
#ifdef USER_PROCESS
while((u = getutxent()) != NULL)
{
if(u->ut_type != USER_PROCESS)
continue;
printf("%-8s %-8s %-16s %2ld:%02ld ", u->ut_user, u->ut_line,
u->ut_host,
(u->ut_tv.tv_sec - u->ut_tv.tv_sec % 3600) % 24,
(u->ut_tv.tv_sec - u->ut_tv.tv_sec % 60) / 60
% 60);
_print_idle(&tv, u->ut_line);
_print_what(u->ut_pid);
}
#else
# warning Unsupported platform: USER_PROCESS is not supported
#endif
return 0;
}
static int _print_idle(struct timeval * tv, char * device)
{
char dev[16];
struct stat st;
unsigned long idle;
if(snprintf(dev, sizeof(dev), "%s%s", "/dev/", device)
> (int)sizeof(dev))
return printf("%5s ", "?");
if(lstat(dev, &st) != 0)
return printf("%5s ", "?");
idle = tv->tv_sec - st.st_atime;
if(idle / 3600 >= 24)
return printf("%4lud ", idle / 3600 / 24);
else if(idle / 60 >= 60)
return printf("%02lu:%02lu ", idle / 3600, idle % 3600 / 60);
return printf("%02lum%02lu ", idle / 60, idle % 60);
}
static int _print_what(pid_t pid)
{
char proc[33];
FILE * fp;
int len;
if(pid < 0)
return putchar('\n');
if(snprintf(proc, sizeof(proc), "%s%d%s", "/proc/", pid, "/cmdline")
> (int)sizeof(proc))
return printf(" %d\n", pid);
if((fp = fopen(proc, "r")) == NULL)
{
printf(" %d\n", pid);
return _w_error(proc, 0);
}
if((len = fread(proc, sizeof(char), sizeof(proc) - 1, fp)) < 0)
{
fclose(fp);
printf(" %d\n", pid);
return _w_error(proc, 0);
}
proc[len] = '\0';
printf("%s\n", proc);
return fclose(fp);
}
/* w_error */
static int _w_error(char * message, int ret)
{
fputs(PROGNAME ": ", stderr);
perror(message);
return ret;
}
/* w_usage */
static int _w_usage(void)
{
fputs("Usage: " PROGNAME "\n", stderr);
return 1;
}
/* public */
/* functions */
/* main */
int main(int argc, char * argv[])
{
int o;
while((o = getopt(argc, argv, "")) != -1)
return _w_usage();
if(optind != argc)
return _w_usage();
return (_w() == 0) ? 0 : 2;
}