1/* pututline.c: A replacement for the pututline() function 2 3%%% copyright-cmetz-96 4This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved. 5The Inner Net License Version 3 applies to this software. 6You should have received a copy of the license with this software. If 7you didn't get a copy, you may request one from <license@inner.net>. 8 9 History: 10 11 Modified by cmetz for OPIE 2.32. Fixed check for fread() return 12 value. 13 Modified by cmetz for OPIE 2.31. If the OS won't tell us where 14 _PATH_UTMP is, use Autoconf-discovered values. 15 Created by cmetz for OPIE 2.3. 16*/ 17 18#include "opie_cfg.h" 19#include <stdio.h> 20#include <utmp.h> 21#include "opie.h" 22 23#ifndef _PATH_UTMP 24#define _PATH_UTMP PATH_UTMP_AC 25#endif /* _PATH_UTMP */ 26 27void pututline FUNCTION((utmp), struct utmp *utmp) 28{ 29 FILE *f; 30 struct utmp u; 31 int i; 32 33 if (!(f = __opieopen(_PATH_UTMP, 1, 0644))) 34 return; 35 36#if HAVE_TTYSLOT 37 if (i = ttyslot()) { 38 if (fseek(f, i * sizeof(struct utmp), SEEK_SET) < 0) 39 goto ret; 40 fwrite(utmp, sizeof(struct utmp), 1, f); 41 goto ret; 42 } 43#endif /* HAVE_TTYSLOT */ 44 45 while(fread(&u, sizeof(struct utmp), 1, f) == 1) { 46 if (!strncmp(utmp->ut_line, u.ut_line, sizeof(u.ut_line) - 1)) { 47 if ((i = ftell(f)) < 0) 48 goto ret; 49 if (fseek(f, i - sizeof(struct utmp), SEEK_SET) < 0) 50 goto ret; 51 fwrite(utmp, sizeof(struct utmp), 1, f); 52 goto ret; 53 } 54 } 55 56 fclose(f); 57 58 if (!(f = __opieopen(_PATH_UTMP, 2, 0644))) 59 return; 60 fwrite(utmp, sizeof(struct utmp), 1, f); 61 62ret: 63 fclose(f); 64} 65