+++ /dev/null
-/*
-** rcvtty.c -- a rcvmail program (a lot like rcvalert) handling IPC ttys
-**
-** This code is Copyright (c) 2002, by the authors of nmh. See the
-** COPYRIGHT file in the root directory of the nmh distribution for
-** complete copyright information.
-*/
-
-/* Changed to use getutent() and friends. Assumes that when getutent() exists,
-** a number of other things also exist. Please check.
-** Ruud de Rooij <ruud@ruud.org> Sun, 28 May 2000 17:28:55 +0200
-*/
-
-#include <h/mh.h>
-#include <h/signals.h>
-#include <h/rcvmail.h>
-#include <h/scansbr.h>
-#include <h/tws.h>
-#include <signal.h>
-#include <fcntl.h>
-
-#include <utmp.h>
-
-#ifndef HAVE_GETUTENT
-# ifndef UTMP_FILE
-# ifdef _PATH_UTMP
-# define UTMP_FILE _PATH_UTMP
-# else
-# define UTMP_FILE "/etc/utmp"
-# endif
-# endif
-#endif
-
-#define SCANFMT \
-"=%2(hour{dtimenow}):%02(min{dtimenow}): %<(size)%5(size) %>%<{encrypted}E%>\
-%<(mymbox{from})%<{to}To:%14(friendly{to})%>%>%<(zero)%17(friendly{from})%> \
-%{subject}"
-
-static struct swit switches[] = {
-#define BIFFSW 0
- { "biff", 0 },
-#define FORMSW 1
- { "form formatfile", 0 },
-#define WIDTHSW 2
- { "width columns", 0 },
-#define NLSW 3
- { "newline", 0 },
-#define NNLSW 4
- { "nonewline", 0 },
-#define BELSW 5
- { "bell", 0 },
-#define NBELSW 6
- { "nobell", 0 },
-#define VERSIONSW 7
- { "version", 0 },
-#define HELPSW 8
- { "help", 0 },
- { NULL, 0 }
-};
-
-static jmp_buf myctx;
-static int bell = 1;
-static int newline = 1;
-static int biff = 0;
-static int width = 0;
-static char *form = NULL;
-
-/*
-** static prototypes
-*/
-static RETSIGTYPE alrmser(int);
-static int message_fd(char **);
-static int header_fd(void);
-static void alert(char *, int);
-
-
-int
-main(int argc, char **argv)
-{
- int md, vecp = 0;
- char *cp, *user, buf[BUFSIZ], tty[BUFSIZ];
- char **argp, **arguments, *vec[MAXARGS];
-#ifdef HAVE_GETUTENT
- struct utmp * utp;
-#else
- struct utmp ut;
- register FILE *uf;
-#endif
-
-#ifdef LOCALE
- setlocale(LC_ALL, "");
-#endif
- invo_name = mhbasename(argv[0]);
-
- /* read user profile/context */
- context_read();
-
- arguments = getarguments(invo_name, argc, argv, 1);
- argp = arguments;
-
- while ((cp = *argp++)) {
- if (*cp == '-') {
- switch (smatch(++cp, switches)) {
- case AMBIGSW:
- ambigsw(cp, switches);
- done(1);
- case UNKWNSW:
- vec[vecp++] = --cp;
- continue;
-
- case HELPSW:
- snprintf(buf, sizeof(buf), "%s [command ...]",
- invo_name);
- print_help(buf, switches, 1);
- done(1);
- case VERSIONSW:
- print_version(invo_name);
- done(1);
-
- case BIFFSW:
- biff = 1;
- continue;
-
- case FORMSW:
- if (!(form = *argp++) || *form == '-')
- adios(NULL, "missing argument to %s",
- argp[-2]);
- continue;
-
- case WIDTHSW:
- if (!(cp = *argp++) || *cp == '-')
- adios(NULL, "missing argument to %s",
- argp[-2]);
- width = atoi(cp);
- continue;
- case NLSW:
- newline = 1;
- continue;
- case NNLSW:
- newline = 0;
- continue;
- case BELSW:
- bell = 1;
- continue;
- case NBELSW:
- bell = 0;
- continue;
-
- }
- }
- vec[vecp++] = cp;
- }
- vec[vecp] = 0;
-
- if ((md = vecp ? message_fd(vec) : header_fd()) == NOTOK)
- exit(RCV_MBX);
-
- user = getusername();
-
-#ifdef HAVE_GETUTENT
- setutent();
- while ((utp = getutent()) != NULL) {
- if (
-#ifdef HAVE_STRUCT_UTMP_UT_TYPE
- utp->ut_type == USER_PROCESS &&
-#endif
- utp->ut_name[0] != 0 && utp->ut_line[0] != 0
- && strncmp(user, utp->ut_name,
- sizeof(utp->ut_name)) == 0) {
- strncpy(tty, utp->ut_line, sizeof(utp->ut_line));
- alert(tty, md);
- }
- }
- endutent();
-#else
- if ((uf = fopen(UTMP_FILE, "r")) == NULL)
- exit(RCV_MBX);
- while (fread((char *) &ut, sizeof(ut), 1, uf) == 1)
- if (ut.ut_name[0] != 0 &&
- strncmp(user, ut.ut_name, sizeof(ut.ut_name))
- == 0) {
- strncpy(tty, ut.ut_line, sizeof(ut.ut_line));
- alert(tty, md);
- }
- fclose(uf);
-#endif
-
- exit(RCV_MOK);
- return 0; /* dead code to satisfy the compiler */
-}
-
-
-static RETSIGTYPE
-alrmser(int i)
-{
-#ifndef RELIABLE_SIGNALS
- SIGNAL(SIGALRM, alrmser);
-#endif
-
- longjmp(myctx, 1);
-}
-
-
-static int
-message_fd(char **vec)
-{
- pid_t child_id;
- int bytes, fd, seconds;
- char tmpfil[BUFSIZ];
- struct stat st;
-
-#ifdef HAVE_MKSTEMP
- fd = mkstemp(strncpy(tmpfil, "/tmp/rcvttyXXXXX", sizeof(tmpfil)));
-#else
- unlink(mktemp(strncpy(tmpfil, "/tmp/rcvttyXXXXX", sizeof(tmpfil))));
- if ((fd = open(tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == NOTOK)
- return header_fd();
-#endif
- unlink(tmpfil);
-
- if ((child_id = fork()) == NOTOK) {
- /* fork error */
- close(fd);
- return header_fd();
- } else if (child_id) {
- /* parent process */
- if (!setjmp(myctx)) {
- SIGNAL(SIGALRM, alrmser);
- bytes = fstat(fileno(stdin), &st) != NOTOK ?
- (int) st.st_size : 100;
-
- /* amount of time to wait depends on message size */
- if (bytes <= 100) {
- /* give at least 5 minutes */
- seconds = 300;
- } else if (bytes >= 90000) {
- /* but 30 minutes should be long enough */
- seconds = 1800;
- } else {
- seconds = (bytes / 60) + 300;
- }
- alarm((unsigned int) seconds);
- pidwait(child_id, OK);
- alarm(0);
-
- if (fstat(fd, &st) != NOTOK && st.st_size > (off_t) 0)
- return fd;
- } else {
- /*
- ** Ruthlessly kill the child and anything
- ** else in its process group.
- */
- KILLPG(child_id, SIGKILL);
- }
- close(fd);
- return header_fd();
- }
-
- /* child process */
- rewind(stdin);
- if (dup2(fd, 1) == NOTOK || dup2(fd, 2) == NOTOK)
- _exit(-1);
- closefds(3);
- setpgid((pid_t) 0, getpid()); /* put in own process group */
- execvp(vec[0], vec);
- _exit(-1);
- return 1; /* dead code to satisfy compiler */
-}
-
-
-static int
-header_fd(void)
-{
- int fd;
- char *nfs;
- char *tfile = NULL;
-
- tfile = m_mktemp2(NULL, invo_name, &fd, NULL);
- if (tfile == NULL) return NOTOK;
- unlink(tfile);
-
- rewind(stdin);
-
- /* get new format string */
- nfs = new_fs(form, SCANFMT);
- scan(stdin, 0, 0, nfs, width, 0, 0, NULL, 0L, 0);
- if (newline)
- write(fd, "\n\r", 2);
- write(fd, scanl, strlen(scanl));
- if (bell)
- write(fd, "\007", 1);
-
- return fd;
-}
-
-
-static void
-alert(char *tty, int md)
-{
- int i, td, mask;
- char buffer[BUFSIZ], ttyspec[BUFSIZ];
- struct stat st;
-
- snprintf(ttyspec, sizeof(ttyspec), "/dev/%s", tty);
-
- /*
- ** The mask depends on whether we are checking for
- ** write permission based on `biff' or `mesg'.
- */
- mask = biff ? S_IEXEC : (S_IWRITE >> 3);
- if (stat(ttyspec, &st) == NOTOK || (st.st_mode & mask) == 0)
- return;
-
- if (!setjmp(myctx)) {
- SIGNAL(SIGALRM, alrmser);
- alarm(2);
- td = open(ttyspec, O_WRONLY);
- alarm(0);
- if (td == NOTOK)
- return;
- } else {
- alarm(0);
- return;
- }
-
- lseek(md, (off_t) 0, SEEK_SET);
-
- while ((i = read(md, buffer, sizeof(buffer))) > 0)
- if (write(td, buffer, i) != i)
- break;
-
- close(td);
-}
projects / mmh / blobdiff