1 /* 2 char id_getc[] = "@(#)getc_.c 1.2"; 3 * 4 * get a character from the standard input 5 * 6 * calling sequence: 7 * integer getc 8 * ierror = getc (char) 9 * where: 10 * char will be read from the standard input, usually the terminal 11 * ierror will be 0 if successful; a system error code otherwise. 12 */ 13 14 #include "../libI77/f_errno.h" 15 #include "../libI77/fiodefs.h" 16 17 extern unit units[]; /* logical units table from iolib */ 18 19 long getc_(c, clen) 20 char *c; long clen; 21 { 22 int i; 23 unit *lu; 24 25 lu = &units[STDIN]; 26 if (!lu->ufd) 27 return((long)(errno=F_ERNOPEN)); 28 if (lu->uwrt) 29 nowreading(lu); 30 if ((i = getc (lu->ufd)) < 0) 31 { 32 if (feof(lu->ufd)) 33 return(-1L); 34 i = errno; 35 clearerr(lu->ufd); 36 return((long)i); 37 } 38 *c = i & 0177; 39 return(0L); 40 } 41