206 lines
4.6 KiB
C
Executable File
206 lines
4.6 KiB
C
Executable File
/*
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* compat.c
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*
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* Compatibility functions for different OSes
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "compat.h"
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#include "our_syslog.h"
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#ifndef HAVE_STRLCPY
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#include <string.h>
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#include <stdio.h>
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void strlcpy(char *dst, const char *src, size_t size)
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{
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strncpy(dst, src, size - 1);
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dst[size - 1] = '\0';
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}
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#endif
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#ifndef HAVE_MEMMOVE
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void *memmove(void *dst, const void *src, size_t size)
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{
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bcopy(src, dst, size);
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return dst;
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}
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#endif
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#ifndef HAVE_OPENPTY
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/*
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* Finds a free PTY/TTY pair.
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*
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* This is derived from C.S. Ananian's pty.c that was with his pptp client.
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*
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*************************************************************************
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* pty.c - find a free pty/tty pair.
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* inspired by the xterm source.
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* NOTE: This is very likely to be highly non-portable.
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* C. Scott Ananian <cananian@alumni.princeton.edu>
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*
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* Heavily modified to chage from getpseudopty() to openpty().
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#if HAVE_SYSLOG_H
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#include <syslog.h>
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#else
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#include "our_syslog.h"
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#endif
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int openpty(int *master, int *slave, char *name, void *unused1, void *unused2)
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{
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int devindex = 0, letter = 0;
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int fd1, fd2;
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char ttydev[PTYMAX], ptydev[TTYMAX];
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syslog(LOG_DEBUG, "CTRL: Allocating pty/tty pair");
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strcpy(ttydev, TTYDEV);
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strcpy(ptydev, PTYDEV);
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while (PTYCHAR1[letter]) {
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ttydev[TTYMAX - 3] = ptydev[PTYMAX - 3] = PTYCHAR1[letter];
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while (PTYCHAR2[devindex]) {
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ttydev[TTYMAX - 2] = ptydev[PTYMAX - 2] = PTYCHAR2[devindex];
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if ((fd1 = open(ptydev, O_RDWR)) >= 0) {
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if ((fd2 = open(ttydev, O_RDWR)) >= 0) {
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goto out;
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} else {
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close(fd1);
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}
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}
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devindex++;
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}
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devindex = 0;
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letter++;
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}
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syslog(LOG_ERR, "CTRL: Failed to allocate pty");
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return -1; /* Unable to allocate pty */
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out:
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syslog(LOG_INFO, "CTRL: Allocated pty/tty pair (%s,%s)", ptydev, ttydev);
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if (master)
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*master = fd1;
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if (slave)
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*slave = fd2;
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if (name)
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strcpy(name, ttydev); /* no way to bounds check */
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return 0;
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}
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#endif
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#ifndef HAVE_STRERROR
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char *strerror(int errnum) {
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static char buf[16];
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sprintf(buf, "Error %d", errnum);
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return buf;
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}
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#endif
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#ifndef HAVE_SETPROCTITLE
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#include "inststr.h"
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#endif
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#define __USE_BSD 1
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#include <stdarg.h>
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#include <stdio.h>
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void my_setproctitle(int argc, char **argv, const char *format, ...) {
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char proctitle[64];
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va_list parms;
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va_start(parms, format);
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vsnprintf(proctitle, sizeof(proctitle), format, parms);
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#ifndef HAVE_SETPROCTITLE
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inststr(argc, argv, proctitle);
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#else
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setproctitle(proctitle);
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#endif
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va_end(parms);
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}
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/* signal to pipe delivery implementation */
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#include <unistd.h>
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#include <fcntl.h>
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#include <signal.h>
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/* pipe private to process */
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static int sigpipe[2];
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/* create a signal pipe, returns 0 for success, -1 with errno for failure */
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int sigpipe_create()
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{
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int rc;
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rc = pipe(sigpipe);
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if (rc < 0) return rc;
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fcntl(sigpipe[0], F_SETFD, FD_CLOEXEC);
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fcntl(sigpipe[1], F_SETFD, FD_CLOEXEC);
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#ifdef O_NONBLOCK
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#define FLAG_TO_SET O_NONBLOCK
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#else
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#ifdef SYSV
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#define FLAG_TO_SET O_NDELAY
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#else /* BSD */
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#define FLAG_TO_SET FNDELAY
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#endif
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#endif
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rc = fcntl(sigpipe[1], F_GETFL);
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if (rc != -1)
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rc = fcntl(sigpipe[1], F_SETFL, rc | FLAG_TO_SET);
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if (rc < 0) return rc;
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return 0;
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#undef FLAG_TO_SET
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}
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/* generic handler for signals, writes signal number to pipe */
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void sigpipe_handler(int signum)
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{
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if (write(sigpipe[1], &signum, sizeof(signum)) == -1) {
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syslog_perror("sigpipe write");
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}
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signal(signum, sigpipe_handler);
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}
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/* assign a signal number to the pipe */
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void sigpipe_assign(int signum)
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{
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struct sigaction sa;
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memset(&sa, 0, sizeof(sa));
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sa.sa_handler = sigpipe_handler;
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sigaction(signum, &sa, NULL);
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}
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/* return the signal pipe read file descriptor for select(2) */
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int sigpipe_fd()
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{
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return sigpipe[0];
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}
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/* read and return the pending signal from the pipe */
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int sigpipe_read()
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{
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int signum;
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if (read(sigpipe[0], &signum, sizeof(signum)) == -1) {
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syslog_perror("sigpipe read");
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return 0;
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}
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return signum;
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}
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void sigpipe_close()
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{
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close(sigpipe[0]);
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close(sigpipe[1]);
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}
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