libutempter-utmp-cleanup.patch

   1 --- libutempter-1.1.5/Makefile~ 2007-02-19 13:14:08.000000000 +0100
   2 +++ libutempter-1.1.5/Makefile  2010-09-21 14:16:43.025917709 +0200
   3 @@ -27,7 +27,7 @@
   4  STATICLIB = lib$(PROJECT).a
   5  MAP = lib$(PROJECT).map
   6
   7 -TARGETS = $(PROJECT) $(SHAREDLIB) $(STATICLIB)
   8 +TARGETS = $(PROJECT) $(SHAREDLIB) $(STATICLIB) utmp-cleanup
   9
  10  INSTALL = install
  11  libdir = /usr/lib
  12 @@ -70,8 +70,9 @@
  13         $(INSTALL) -p -m644 $(PROJECT).h $(DESTDIR)$(includedir)/
  14         $(INSTALL) -p -m755 $(SHAREDLIB) $(DESTDIR)$(libdir)/$(SHAREDLIB).$(VERSION)
  15         $(INSTALL) -p -m644 $(STATICLIB) $(DESTDIR)$(libdir)/
  16 +       $(INSTALL) -p -m755 utmp-cleanup $(DESTDIR)$(libexecdir)/$(PROJECT)/
  17         ln -s $(SHAREDLIB).$(VERSION) $(DESTDIR)$(libdir)/$(SONAME)
  18         ln -s $(SONAME) $(DESTDIR)$(libdir)/$(SHAREDLIB)
  19
  20  clean:
  21 -       $(RM) $(TARGETS) iface.o iface.os core *~
  22 +       $(RM) $(TARGETS) iface.o iface.os core *~ utmp-cleanup
  23 diff -urN utempter-0.5.3.org/utmp-cleanup.c utempter-0.5.3/utmp-cleanup.c
  24 --- utempter-0.5.3.org/utmp-cleanup.c   1970-01-01 01:00:00.000000000 +0100
  25 +++ utempter-0.5.3/utmp-cleanup.c       2003-12-18 23:33:51.996966369 +0100
  26 @@ -0,0 +1,69 @@
  27 +#include <unistd.h>
  28 +#include <fcntl.h>
  29 +#include <stdio.h>
  30 +#include <utmp.h>
  31 +#include <sys/stat.h>
  32 +#include <sys/types.h>
  33 +#include <pwd.h>
  34 +
  35 +int check_entry(struct utmp * ut)
  36 +{
  37 +char buf[100];
  38 +struct stat st;
  39 +struct passwd * pwd;
  40 +int s;
  41 +
  42 +pwd=getpwnam(ut->ut_user);
  43 +       if(!pwd)return 1;
  44 +
  45 +snprintf(buf,100,"/proc/%d/",ut->ut_pid);
  46 +s=stat(buf,&st);
  47 +       if(s)return 2;
  48 +
  49 +       if(st.st_uid!=pwd->pw_uid && st.st_uid!=0)return 3;
  50 +return 0;
  51 +}
  52 +
  53 +char * msgs[]={"","Nonexistent user","Dead process","Owner mismatch"};
  54 +
  55 +int main(int ac, char ** av)
  56 +{
  57 +int clean=1;
  58 +int justcheck=0;
  59 +int fd;
  60 +char * file="/var/run/utmpx";
  61 +       if(ac>1)file=av[1];
  62 +fd=open(file,O_RDWR,0);
  63 +       if(fd<0){
  64 +       fd=open(file,O_RDONLY,0);
  65 +       justcheck=1;
  66 +       printf("Warning: opening %s read-only\n",file);
  67 +       }
  68 +
  69 +       if(fd<0){
  70 +       perror("open"); exit(1);
  71 +       }
  72 +
  73 +       while(1){
  74 +       struct utmp ut;
  75 +       int r=read(fd,&ut,sizeof(ut));
  76 +               if(r!=sizeof(ut))break;
  77 +
  78 +               if(ut.ut_type==USER_PROCESS){
  79 +               int i;
  80 +                       if((i=check_entry(&ut))){
  81 +                       clean=0;
  82 +                       printf("%s: %d (%s)\n",msgs[i],ut.ut_pid,ut.ut_name);
  83 +                       if(justcheck)continue;
  84 +                       lseek(fd,-sizeof(ut),SEEK_CUR);
  85 +                       bzero(&ut,sizeof(ut));
  86 +                       ut.ut_type=DEAD_PROCESS;
  87 +                       write(fd,&ut,sizeof(ut));
  88 +                       }
  89 +               }
  90 +
  91 +       }
  92 +
  93 +       if(clean)printf("%s is clean\n",file);
  94 +return 0;
  95 +}