mirror of
https://github.com/reactos/wine.git
synced 2024-11-25 12:49:45 +00:00
149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/*
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* Misc. functions for systems that don't have them
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*
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* Copyright 1996 Alexandre Julliard
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <termios.h>
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#ifdef HAVE_LIBIO_H
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# include <libio.h>
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#endif
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#ifndef HAVE_USLEEP
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#ifdef __EMX__
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unsigned int usleep (unsigned int useconds) { DosSleep(useconds); }
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#else
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unsigned int usleep (unsigned int useconds)
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{
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struct timeval delay;
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delay.tv_sec = 0;
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delay.tv_usec = useconds;
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select( 0, 0, 0, 0, &delay );
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return 0;
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}
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#endif
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#endif /* HAVE_USLEEP */
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#ifndef HAVE_MEMMOVE
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void *memmove( void *dest, const void *src, unsigned int len )
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{
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register char *dst = dest;
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/* Use memcpy if not overlapping */
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if ((dst + len <= (char *)src) || ((char *)src + len <= dst))
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{
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memcpy( dst, src, len );
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}
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/* Otherwise do it the hard way (FIXME: could do better than this) */
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else if (dst < src)
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{
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while (len--) *dst++ = *((char *)src)++;
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}
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else
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{
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dst += len - 1;
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src = (char *)src + len - 1;
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while (len--) *dst-- = *((char *)src)--;
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}
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return dest;
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}
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#endif /* HAVE_MEMMOVE */
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#ifndef HAVE_STRERROR
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const char *strerror( int err )
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{
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/* Let's hope we have sys_errlist then */
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return sys_errlist[err];
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}
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#endif /* HAVE_STRERROR */
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#if !defined(HAVE_CLONE) && defined(__linux__)
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#include <assert.h>
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#include <errno.h>
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#include <syscall.h>
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int clone( int (*fn)(void *), void *stack, int flags, void *arg )
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{
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#ifdef __i386__
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int ret;
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void **stack_ptr = (void **)stack;
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*--stack_ptr = arg; /* Push argument on stack */
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*--stack_ptr = fn; /* Push function pointer (popped into ebx) */
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__asm__ __volatile__( "pushl %%ebx\n\t"
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"movl %2,%%ebx\n\t"
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"int $0x80\n\t"
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"popl %%ebx\n\t" /* Contains fn in the child */
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"testl %%eax,%%eax\n\t"
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"jnz 0f\n\t"
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"call *%%ebx\n\t" /* Should never return */
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"xorl %%eax,%%eax\n\t" /* Just in case it does*/
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"0:"
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: "=a" (ret)
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: "0" (SYS_clone), "r" (flags), "c" (stack_ptr) );
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assert( ret ); /* If ret is 0, we returned from the child function */
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if (ret > 0) return ret;
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errno = -ret;
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return -1;
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#else
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errno = EINVAL;
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return -1;
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#endif /* __i386__ */
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}
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#endif /* !HAVE_CLONE && __linux__ */
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/**
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* It looks like the openpty that comes with glibc in RedHat 5.0
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* is buggy (second call returns what looks like a dup of 0 and 1
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* instead of a new pty), this is a generic replacement.
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*/
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/** We will have an autoconf check for this soon... */
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int wine_openpty(int *master, int *slave, char *name,
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struct termios *term, struct winsize *winsize)
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{
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char *ptr1, *ptr2;
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char pts_name[512];
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strcpy (pts_name, "/dev/ptyXY");
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for (ptr1 = "pqrstuvwxyzPQRST"; *ptr1 != 0; ptr1++) {
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pts_name[8] = *ptr1;
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for (ptr2 = "0123456789abcdef"; *ptr2 != 0; ptr2++) {
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pts_name[9] = *ptr2;
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if ((*master = open(pts_name, O_RDWR)) < 0) {
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if (errno == ENOENT)
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return -1;
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else
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continue;
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}
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pts_name[5] = 't';
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if ((*slave = open(pts_name, O_RDWR)) < 0) {
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pts_name[5] = 'p';
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continue;
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}
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if (term != NULL)
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tcsetattr(*slave, TCSANOW, term);
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if (winsize != NULL)
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ioctl(*slave, TIOCSWINSZ, winsize);
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if (name != NULL)
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strcpy(name, pts_name);
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return *slave;
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}
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}
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return -1;
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}
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