projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| fd8223c6 KS |
1 | # |
| 2 | ||
| 3 | /* | |
| 4 | * Mail -- a mail program | |
| 5 | * | |
| 6 | * Computer Center Unix | |
| 7 | * | |
| 8 | * Local routines that are installation dependent. | |
| 9 | */ | |
| 10 | ||
| 11 | #include "rcv.h" | |
| 12 | ||
| 79ddb121 | 13 | static char *SccsId = "@(#)cc.local.c 2.1 %G%"; |
| fd8223c6 KS |
14 | |
| 15 | /* | |
| 16 | * Locate the user's mailbox file (ie, the place where new, unread | |
| 17 | * mail is queued). At Computer Center, it is in /usr/mail/name. | |
| 18 | */ | |
| 19 | ||
| 20 | findmail() | |
| 21 | { | |
| 22 | register char *cp; | |
| 23 | ||
| 24 | cp = copy("/usr/mail/", mailname); | |
| 25 | copy(myname, cp); | |
| 26 | } | |
| 27 | ||
| 28 | /* | |
| 29 | * Get rid of the queued mail. | |
| 30 | * This is essentially "mail -n > /dev/null &" | |
| 31 | */ | |
| 32 | ||
| 33 | demail() | |
| 34 | { | |
| 35 | register int p; | |
| 36 | ||
| 37 | if (uid == 0) { | |
| 38 | remove(mailname); | |
| 39 | return; | |
| 40 | } | |
| 41 | if ((p = fork()) != 0) | |
| 42 | return; | |
| 43 | for (p = 0; p < 15; p++) | |
| 44 | close(p); | |
| 45 | open("/dev/null", 2); | |
| 46 | dup(0); | |
| 47 | dup(0); | |
| 48 | for (p = SIGHUP; p <= SIGQUIT; p++) | |
| 49 | signal(p, SIG_IGN); | |
| 50 | execl(MAIL, "mail", "-n", 0); | |
| 51 | perror(MAIL); | |
| 52 | exit(1); | |
| 53 | } | |
| 54 | ||
| 55 | /* | |
| 56 | * Get the value of an environment variable. | |
| 57 | */ | |
| 58 | ||
| 59 | char * | |
| 60 | getenv(name) | |
| 61 | char name[]; | |
| 62 | { | |
| 63 | register int t; | |
| 64 | static char val[30]; | |
| 65 | ||
| 66 | t = ttyn(2); | |
| 67 | hget(t); | |
| 68 | if (equal(name, "SHELL")) | |
| 69 | return("/bin/csh"); | |
| 70 | if (!equal(name, "HOME")) | |
| 71 | return(NOSTR); | |
| 72 | copy(hgethome(), val); | |
| 73 | return(val); | |
| 74 | } | |
| 75 | ||
| 76 | /* | |
| 77 | * Mail file lock / unlock. | |
| 78 | * Not implemented in this version. | |
| 79 | */ | |
| 80 | ||
| 81 | lock(name) | |
| 82 | char name[]; | |
| 83 | { | |
| 84 | ||
| 85 | return(0); | |
| 86 | } | |
| 87 | ||
| 88 | unlock() | |
| 89 | { | |
| 90 | return(0); | |
| 91 | } | |
| 92 | ||
| 93 | /* | |
| 94 | * Discover user login name. | |
| 95 | */ | |
| 96 | ||
| 97 | username(uid, namebuf) | |
| 98 | char namebuf[]; | |
| 99 | { | |
| 100 | ||
| 101 | return(getname(uid, namebuf)); | |
| 102 | } | |
| 103 | ||
| 104 | /* | |
| 105 | * Unix routine to do an "fopen" on file descriptor | |
| 106 | * The mode has to be repeated because you can't query its | |
| 107 | * status | |
| 108 | */ | |
| 109 | ||
| 110 | FILE * | |
| 111 | fdopen(fd, mode) | |
| 112 | register char *mode; | |
| 113 | { | |
| 114 | extern int errno; | |
| 115 | register FILE *iop; | |
| 116 | extern FILE *_lastbuf; | |
| 117 | ||
| 118 | for (iop = _iob; iop->_flag&(_IOREAD|_IOWRT); iop++) | |
| 119 | if (iop >= _lastbuf) | |
| 120 | return(NULL); | |
| 121 | iop->_cnt = 0; | |
| 122 | iop->_file = fd; | |
| 123 | if (*mode != 'r') { | |
| 124 | iop->_flag |= _IOWRT; | |
| 125 | if (*mode == 'a') | |
| 126 | lseek(fd, 0L, 2); | |
| 127 | } else | |
| 128 | iop->_flag |= _IOREAD; | |
| 129 | return(iop); | |
| 130 | } |