1 /* remote.c 4.1 81/05/09 */ 2 # include "tip.h" 3 4 /* 5 * Attributes to be gleened from remote host description 6 * data base. 7 */ 8 static char **caps[] = { 9 &AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN 10 }; 11 12 static char *capstrings[] = { 13 "at", "dv", "cm", "cu", "el", "ie", "oe", "pn", 0 14 }; 15 16 char *rgetstr(); 17 18 static 19 getremcap(host) 20 register char *host; 21 { 22 int stat; 23 char tbuf[BUFSIZ]; 24 static char buf[BUFSIZ/2]; 25 char *bp = buf; 26 register char **p, ***q; 27 28 if ((stat = rgetent(tbuf, host)) <= 0) { 29 fprintf(stderr, stat == 0 ? 30 "tip: unknown host %s\n" : 31 "tip: can't open host description file\n", host); 32 exit(3); 33 } 34 35 for (p = capstrings, q = caps; *p != NULL; p++, q++) 36 **q = rgetstr(*p, &bp); 37 if ((BR = rgetnum("br")) < 0) 38 BR = DEFBR; 39 if ((FS = rgetnum("fs")) < 0) 40 FS = DEFFS; 41 DU = rgetflag("du"); 42 if (DV == NOSTR) { 43 fprintf(stderr, "%s: missing device spec\n", host); 44 exit(3); 45 } 46 if (DU && CU == NOSTR) 47 CU = DV; 48 if (DU && PN == NOSTR) { 49 fprintf(stderr, "%s: missing phone number\n", host); 50 exit(3); 51 } 52 HO = host; 53 } 54 55 char * 56 getremote(host) 57 char *host; 58 { 59 register char *cp; 60 static char *next; 61 static int lookedup = 0; 62 63 if (!lookedup) { 64 if (host == NOSTR && (host = getenv("HOST")) == NOSTR) { 65 fprintf(stderr, "tip: no host specified\n"); 66 exit(3); 67 } 68 getremcap(host); 69 next = DV; 70 lookedup++; 71 } 72 /* 73 * We return a new device each time we're called (to allow 74 * a rotary action to be simulated) 75 */ 76 if (next == NOSTR) 77 return(NOSTR); 78 if ((cp = index(next, ',')) == NULL) { 79 DV = next; 80 next = NOSTR; 81 } else { 82 *cp++ = '\0'; 83 DV = next; 84 next = cp; 85 } 86 return(DV); 87 } 88