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annotate toys/pending/watch.c @ 1349:bf2e5591bdf0 draft

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Cleanup strings.
author Rob Landley <rob@landley.net>
date Wed, 11 Jun 2014 08:02:55 -0500
parents 0ecfaa7022e8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* watch.c - Execute a program periodically
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2 *
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3 * Copyright 2013 Sandeep Sharma <sandeep.jack2756@gmail.com>
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
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5 *
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6 USE_WATCH(NEWTOY(watch, "^<1n#<0=2te", TOYFLAG_USR|TOYFLAG_BIN))
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7
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8 config WATCH
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9 bool "watch"
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10 default n
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11 help
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12 usage: watch [-n SEC] [-t] PROG ARGS
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13
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14 Run PROG periodically
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15
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16 -n Loop period in seconds (default 2)
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17 -t Don't print header
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18 -e Freeze updates on command error, and exit after enter.
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19 */
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20 #define FOR_watch
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21 #include "toys.h"
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22
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23 GLOBALS(
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24 int interval;
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25 )
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26
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27 void watch_main(void)
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28 {
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29 int i = 0, hlen;
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30 time_t t;
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31 unsigned width = 80, len = sizeof("Www Mmm dd hh:mm:ss yyyy") - 1 ;
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32 char *header, *cmd = *toys.optargs;
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33 int retval;
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34
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35 while(toys.optargs[++i])
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36 {
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37 char * oldcmd = cmd;
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38 cmd = xmprintf("%s %s", oldcmd, toys.optargs[i]);
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39 if (CFG_TOYBOX_FREE) free(oldcmd);
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40 }
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41 header = xmprintf("Every %us: %s", TT.interval, cmd);
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42 hlen = strlen(header);
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43
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44 while(1) {
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45 xprintf("\033[H\033[J");
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46 if(!(toys.optflags & FLAG_t)) {
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47 terminal_size(&width, NULL);
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48 if (!width) width = 80; //on serial it may return 0.
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49 time(&t);
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50 if (width > (hlen + len)) xprintf("%s", header);
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51 if(width >= len)
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52 xprintf("%*s\n",width + ((width > (hlen + len))?-hlen:0) + 1, ctime(&t));
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53 else
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54 xprintf("\n\n");
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55 }
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56 fflush(NULL); //making sure the screen is clear
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57 retval = system(cmd);
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58 if ((toys.optflags & FLAG_e) && retval){
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59 xprintf("command exit with non-zero status, press enter to exit\n");
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60 getchar();
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61 break;
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62 }
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63 sleep(TT.interval);
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64 }
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65
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66 if (CFG_TOYBOX_FREE){
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67 free(header);
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68 if (cmd != *toys.optargs) free(cmd);
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69 }
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70 }