| 1 | /****************************************************************************** |
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| 2 | * * |
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| 3 | * rep -- run a program repeatedly using 'curses'. * |
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| 4 | * * |
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| 5 | * Usage: rep [-n] command * |
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| 6 | * * |
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| 7 | * Permits the user to watch a program like 'w' or 'finger' change with * |
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| 8 | * time. Given an argument '-x' will cause a repetion every x seconds. * |
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| 9 | * * |
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| 10 | * ORIGINAL * |
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| 11 | * Ray Lubinsky University of Virginia, Dept. of Computer Science * |
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| 12 | * uucp: decvax!mcnc!ncsu!uvacs!rwl * |
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| 13 | * MODIFIED 3/85 * |
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| 14 | * Bruce Karsh, Univ. Wisconsin, Madison. Dept. of Geophysics. * |
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| 15 | * uucp: uwvax\!geowhiz\!karsh * |
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| 16 | ******************************************************************************/ |
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| 17 | |
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| 18 | #include <curses.h> |
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| 19 | #include <signal.h> |
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| 20 | |
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| 21 | #define NextLine fgets(buf,sizeof buf,input) |
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| 22 | |
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| 23 | FILE *input; /* Pipe from 'source' */ |
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| 24 | char source[512]; /* Source program to run repeatedly */ |
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| 25 | char *progname; /* Name of this program (for errors) */ |
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| 26 | int interval = 1; /* Seconds between repitions */ |
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| 27 | int deathflag = 0; /* Set by interupt trap routine */ |
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| 28 | |
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| 29 | main(argc,argv) |
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| 30 | int argc; |
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| 31 | char **argv; |
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| 32 | { |
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| 33 | int endrep(); /* Mop up routine on break */ |
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| 34 | FILE *popen(); |
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| 35 | |
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| 36 | char buf[BUFSIZ]; /* Buffer holds a line from 'source' */ |
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| 37 | int i; |
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| 38 | |
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| 39 | progname = *argv; |
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| 40 | source[0]=0; |
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| 41 | if (argc == 1) |
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| 42 | badargs(); |
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| 43 | if (**(argv+1) == '-') /* User specified interval */ |
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| 44 | if ((--argc == 1) || ((interval = atoi(*(++argv)+1)) == 0)) |
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| 45 | badargs(); |
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| 46 | while (--argc > 0) { /* Argument becomes source program */ |
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| 47 | strcat(source,*++argv); |
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| 48 | strcat(source," "); |
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| 49 | } |
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| 50 | signal(SIGINT,endrep); |
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| 51 | if(deathflag == 1)goto die; |
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| 52 | initscr(); |
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| 53 | if(deathflag == 1)goto die; |
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| 54 | crmode(); |
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| 55 | if(deathflag == 1)goto die; |
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| 56 | nonl(); |
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| 57 | if(deathflag == 1)goto die; |
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| 58 | clear(); |
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| 59 | if(deathflag == 1)goto die; |
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| 60 | for (;;) { |
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| 61 | if(deathflag == 1)goto die; |
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| 62 | if ((input = popen(source,"r")) == NULL) { |
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| 63 | fprintf(stderr,"%s: can't run %s\n",progname,source); |
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| 64 | goto die; |
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| 65 | } |
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| 66 | for (i = 0; (i < LINES) && (NextLine != NULL); i++) { |
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| 67 | mvaddstr(i,0,buf); |
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| 68 | clrtoeol(); |
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| 69 | if(deathflag == 1)goto die; |
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| 70 | } |
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| 71 | if(deathflag == 1)goto die; |
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| 72 | pclose(input); |
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| 73 | if(deathflag == 1)goto die; |
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| 74 | clrtobot(); |
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| 75 | if(deathflag == 1)goto die; |
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| 76 | refresh(); |
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| 77 | if(deathflag == 1)goto die; |
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| 78 | sleep(interval); |
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| 79 | if(deathflag == 1)goto die; |
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| 80 | } |
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| 81 | die: |
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| 82 | signal(SIGINT,SIG_IGN); |
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| 83 | if (input != NULL) |
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| 84 | pclose(input); |
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| 85 | clear(); |
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| 86 | refresh(); |
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| 87 | endwin(); |
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| 88 | exit(0); |
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| 89 | } |
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| 90 | |
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| 91 | endrep() |
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| 92 | { |
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| 93 | deathflag=1; |
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| 94 | } |
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| 95 | |
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| 96 | badargs() |
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| 97 | { |
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| 98 | fprintf(stderr,"Usage: %s [-n] command\n",progname); |
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| 99 | exit(1); |
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| 100 | } |
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