94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/*
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* Copyright (c) 1994 Sony Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL SONY CORPORATION BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Sony Corporation
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* shall not be used in advertising or otherwise to promote the sale, use
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* or other dealings in this Software without prior written authorization
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* from Sony Corporation.
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*
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*/
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#include "sj2.h"
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#define LINESIZE 128
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#include <string.h>
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#include <unistd.h>
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static char* getttys(int f);
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static char* ttys = "/etc/ttys";
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#define NULL 0
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int nmttyslot(char * name)
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{
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char *tp, *p;
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int s, tf;
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tp = name;
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if((p = strrchr(tp, '/')) == NULL)
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p = tp;
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else
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p++;
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if((tf = open(ttys, 0)) < 0)
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return (0);
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s = 0;
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while(tp = getttys(tf)) {
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s++;
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if(strcmp(p, tp) == 0) {
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close(tf);
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return (s);
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}
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}
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close(tf);
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return (0);
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}
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static char* getttys(int f)
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{
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static char line[LINESIZE];
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char* lp;
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top:
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for(lp = line; lp < &line[LINESIZE]; lp++) {
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if(read(f, lp, 1) != 1)
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return (NULL);
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if(*lp == '\n') {
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*lp = '\0';
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break;
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} else if(*lp == ' ' || *lp == '\t') {
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while(1) {
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if(read(f, lp, 1) != 1)
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break;
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if(*lp == '\n')
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break;
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}
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*lp = '\0';
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break;
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}
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}
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lp = line;
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if(*lp == '0' || *lp == '1')
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lp += 2;
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else if(*lp == '#')
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goto top;
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return (lp);
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}
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