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/*
* compat.c
*
* Compatibility functions for different OSes
*
* $Id: compat.c,v 1.5 2005/01/05 11:01:51 quozl Exp $
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "compat.h"
#ifndef HAVE_STRLCPY
#include <string.h>
#include <stdio.h>
void strlcpy(char *dst, const char *src, size_t size)
{
strncpy(dst, src, size - 1);
dst[size - 1] = '\0';
}
#endif
#ifndef HAVE_MEMMOVE
void *memmove(void *dst, const void *src, size_t size)
{
bcopy(src, dst, size);
return dst;
}
#endif
#ifndef HAVE_OPENPTY
/*
* Finds a free PTY/TTY pair.
*
* This is derived from C.S. Ananian's pty.c that was with his pptp client.
*
*************************************************************************
* pty.c - find a free pty/tty pair.
* inspired by the xterm source.
* NOTE: This is very likely to be highly non-portable.
* C. Scott Ananian <cananian@alumni.princeton.edu>
*
* Heavily modified to chage from getpseudopty() to openpty().
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#if HAVE_SYSLOG_H
#include <syslog.h>
#else
#include "our_syslog.h"
#endif
int openpty(int *master, int *slave, char *name, void *unused1, void *unused2)
{
int devindex = 0, letter = 0;
int fd1, fd2;
char ttydev[PTYMAX], ptydev[TTYMAX];
syslog(LOG_DEBUG, "CTRL: Allocating pty/tty pair");
strcpy(ttydev, TTYDEV);
strcpy(ptydev, PTYDEV);
while (PTYCHAR1[letter]) {
ttydev[TTYMAX - 3] = ptydev[PTYMAX - 3] = PTYCHAR1[letter];
while (PTYCHAR2[devindex]) {
ttydev[TTYMAX - 2] = ptydev[PTYMAX - 2] = PTYCHAR2[devindex];
if ((fd1 = open(ptydev, O_RDWR)) >= 0) {
if ((fd2 = open(ttydev, O_RDWR)) >= 0) {
goto out;
} else {
close(fd1);
}
}
devindex++;
}
devindex = 0;
letter++;
}
syslog(LOG_ERR, "CTRL: Failed to allocate pty");
return -1; /* Unable to allocate pty */
out:
syslog(LOG_INFO, "CTRL: Allocated pty/tty pair (%s,%s)", ptydev, ttydev);
if (master)
*master = fd1;
if (slave)
*slave = fd2;
if (name)
strcpy(name, ttydev); /* no way to bounds check */
return 0;
}
#endif
#ifndef HAVE_STRERROR
char *strerror(int errnum) {
static char buf[16];
sprintf(buf, "Error %d", errnum);
return buf;
}
#endif
#ifndef HAVE_SETPROCTITLE
#include "inststr.h"
#endif
#define __USE_BSD 1
#include <stdarg.h>
#include <stdio.h>
void my_setproctitle(int argc, char **argv, const char *format, ...) {
char proctitle[64];
va_list parms;
va_start(parms, format);
vsnprintf(proctitle, sizeof(proctitle), format, parms);
#ifndef HAVE_SETPROCTITLE
inststr(argc, argv, proctitle);
#else
setproctitle(proctitle);
#endif
va_end(parms);
}
/* signal to pipe delivery implementation */
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
/* pipe private to process */
static int sigpipe[2];
/* create a signal pipe, returns 0 for success, -1 with errno for failure */
int sigpipe_create()
{
int rc;
rc = pipe(sigpipe);
if (rc < 0) return rc;
fcntl(sigpipe[0], F_SETFD, FD_CLOEXEC);
fcntl(sigpipe[1], F_SETFD, FD_CLOEXEC);
#ifdef O_NONBLOCK
#define FLAG_TO_SET O_NONBLOCK
#else
#ifdef SYSV
#define FLAG_TO_SET O_NDELAY
#else /* BSD */
#define FLAG_TO_SET FNDELAY
#endif
#endif
rc = fcntl(sigpipe[1], F_GETFL);
if (rc != -1)
rc = fcntl(sigpipe[1], F_SETFL, rc | FLAG_TO_SET);
if (rc < 0) return rc;
return 0;
#undef FLAG_TO_SET
}
/* generic handler for signals, writes signal number to pipe */
void sigpipe_handler(int signum)
{
write(sigpipe[1], &signum, sizeof(signum));
signal(signum, sigpipe_handler);
}
/* assign a signal number to the pipe */
void sigpipe_assign(int signum)
{
sigset_t sigset;
struct sigaction sa;
sigemptyset(&sigset);
sigaddset(&sigset, signum);
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sigpipe_handler;
sigaction(signum, &sa, NULL);
}
/* return the signal pipe read file descriptor for select(2) */
int sigpipe_fd()
{
return sigpipe[0];
}
/* read and return the pending signal from the pipe */
int sigpipe_read()
{
int signum;
read(sigpipe[0], &signum, sizeof(signum));
return signum;
}
void sigpipe_close()
{
close(sigpipe[0]);
close(sigpipe[1]);
}
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