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- #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);
- }
-