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annotate toys/posix/who.c @ 1525:95cb37adb024 draft

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Factor out printf-style escape parsing logic from echo.c.
author Rob Landley <rob@landley.net>
date Sat, 18 Oct 2014 17:14:12 -0500
parents 53f165466f3b
children 685a0da6ca59
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1 /* who.c - display who is on the system
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2 *
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3 * Copyright 2012 ProFUSION Embedded Systems
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4 *
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5 * by Luis Felipe Strano Moraes <lfelipe@profusion.mobi>
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6 *
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7 * See http://opengroup.org/onlinepubs/9699919799/utilities/who.html
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8 *
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9 * Posix says to support many options (-abdHlmpqrstTu) but this
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10 * isn't aimed at minicomputers with modem pools.
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11
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12 USE_WHO(NEWTOY(who, "a", TOYFLAG_BIN))
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13
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14 config WHO
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15 bool "who"
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16 default y
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17 help
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18 usage: who
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19
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20 Print logged user information on system
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21 */
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22
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23 #define FOR_who
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24 #include "toys.h"
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25
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26 void who_main(void)
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27 {
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28 struct utmpx *entry;
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30 setutxent();
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31
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32 while ((entry = getutxent())) {
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33 if ((toys.optflags & FLAG_a) || entry->ut_type == USER_PROCESS) {
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34 time_t time;
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35 int time_size;
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36 char *times;
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37
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38 time = entry->ut_tv.tv_sec;
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39 times = ctime(&time);
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40 time_size = strlen(times) - 2;
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41 printf("%s\t%s\t%*.*s\t(%s)\n", entry->ut_user, entry->ut_line,
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42 time_size, time_size, ctime(&time), entry->ut_host);
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43 }
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44 }
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45
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46 endutxent();
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47 }