45 lines
906 B
C
45 lines
906 B
C
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/* finduser.c Copyright Michael Temari 07/22/1996 All Rights Reserved */
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <time.h>
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#include <utmp.h>
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#include <net/gen/in.h>
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#include "talk.h"
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#include "finduser.h"
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int find_user(name, tty)
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char *name;
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char *tty;
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{
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int fd;
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int ret;
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struct utmp utmp;
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/* Now find out if the requested user is logged in. */
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if((fd = open(UTMP, O_RDONLY)) < 0) {
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perror("talkd: opening UTMP file");
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return(FAILED);
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}
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ret = NOT_HERE;
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while(read(fd, &utmp, sizeof(struct utmp)) == sizeof(struct utmp)) {
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if(utmp.ut_type != USER_PROCESS) continue;
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if(strncmp(utmp.ut_user, name, sizeof(utmp.ut_user))) continue;
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if(*tty && strncmp(utmp.ut_line, tty, sizeof(utmp.ut_line))) continue;
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strcpy(tty, utmp.ut_line);
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ret = SUCCESS;
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break;
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}
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close(fd);
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return(ret);
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}
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