--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qbiff.c	Fri Oct 19 14:06:22 2007 +0200
@@ -0,0 +1,113 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <utmp.h>
+#ifndef UTMP_FILE
+#ifdef _PATH_UTMP
+#define UTMP_FILE _PATH_UTMP
+#else
+#define UTMP_FILE "/etc/utmp"
+#endif
+#endif
+#include "readwrite.h"
+#include "stralloc.h"
+#include "substdio.h"
+#include "subfd.h"
+#include "open.h"
+#include "byte.h"
+#include "str.h"
+#include "headerbody.h"
+#include "hfield.h"
+#include "env.h"
+#include "exit.h"
+
+substdio ssutmp;
+char bufutmp[sizeof(struct utmp) * 16];
+int fdutmp;
+substdio sstty;
+char buftty[1024];
+int fdtty;
+
+struct utmp ut;
+char line[sizeof(ut.ut_line) + 1];
+stralloc woof = {0};
+stralloc tofrom = {0};
+stralloc text = {0};
+
+void doit(s,n) char *s; int n;
+{
+ if (!stralloc_catb(&text,s,n)) _exit(0);
+ if (text.len > 78) text.len = 78;
+}
+void dobody(h) stralloc *h; { doit(h->s,h->len); }
+void doheader(h) stralloc *h;
+{
+ int i;
+ if (hfield_known(h->s,h->len) == H_SUBJECT)
+  {
+   i = hfield_skipname(h->s,h->len);
+   doit(h->s + i,h->len - i);
+  }
+}
+void finishheader() { ; }
+
+void main()
+{
+ char *user;
+ char *sender;
+ char *userext;
+ struct stat st;
+ int i;
+
+ if (chdir("/dev") == -1) _exit(0);
+
+ if (!(user = env_get("USER"))) _exit(0);
+ if (!(sender = env_get("SENDER"))) _exit(0);
+ if (!(userext = env_get("LOCAL"))) _exit(0);
+ if (str_len(user) > sizeof(ut.ut_name)) _exit(0);
+
+ if (!stralloc_copys(&tofrom,"*** TO <")) _exit(0);
+ if (!stralloc_cats(&tofrom,userext)) _exit(0);
+ if (!stralloc_cats(&tofrom,"> FROM <")) _exit(0);
+ if (!stralloc_cats(&tofrom,sender)) _exit(0);
+ if (!stralloc_cats(&tofrom,">")) _exit(0);
+
+ for (i = 0;i < tofrom.len;++i)
+   if ((tofrom.s[i] < 32) || (tofrom.s[i] > 126))
+     tofrom.s[i] = '_';
+
+ if (!stralloc_copys(&text,"    ")) _exit(0);
+ if (headerbody(subfdin,doheader,finishheader,dobody) == -1) _exit(0);
+
+ for (i = 0;i < text.len;++i)
+   if ((text.s[i] < 32) || (text.s[i] > 126))
+     text.s[i] = '/';
+
+ if (!stralloc_copys(&woof,"\015\n\007")) _exit(0);
+ if (!stralloc_cat(&woof,&tofrom)) _exit(0);
+ if (!stralloc_cats(&woof,"\015\n")) _exit(0);
+ if (!stralloc_cat(&woof,&text)) _exit(0);
+ if (!stralloc_cats(&woof,"\015\n")) _exit(0);
+
+ fdutmp = open_read(UTMP_FILE);
+ if (fdutmp == -1) _exit(0);
+ substdio_fdbuf(&ssutmp,read,fdutmp,bufutmp,sizeof(bufutmp));
+
+ while (substdio_get(&ssutmp,&ut,sizeof(ut)) == sizeof(ut))
+   if (!str_diffn(ut.ut_name,user,sizeof(ut.ut_name)))
+    {
+     byte_copy(line,sizeof(ut.ut_line),ut.ut_line);
+     line[sizeof(ut.ut_line)] = 0;
+     if (line[0] == '/') continue;
+     if (!line[0]) continue;
+     if (line[str_chr(line,'.')]) continue;
+     fdtty = open_append(line);
+     if (fdtty == -1) continue;
+     if (fstat(fdtty,&st) == -1) { close(fdtty); continue; }
+     if (!(st.st_mode & 0100)) { close(fdtty); continue; }
+     if (st.st_uid != getuid()) { close(fdtty); continue; }
+     substdio_fdbuf(&sstty,write,fdtty,buftty,sizeof(buftty));
+     substdio_putflush(&sstty,woof.s,woof.len);
+     close(fdtty);
+    }
+ _exit(0);
+}