/
os.c
2242 lines (1702 loc) · 45 KB
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os.c
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/* File: "os.c", Time-stamp: <2011-03-20 21:09:44 feeley> */
/* Copyright (c) 1994-2009 by Marc Feeley, All Rights Reserved. */
/*
* This module implements the operating system specific routines
* including:
*
* - OS specific initialization/finalization
* - process termination
* - error handling
* - conversion of error codes to error messages
* - low-level memory allocation
* - program startup
* - time management
* - process times (user time, system time and real time).
* - heartbeat interrupt handling
* - user interrupt handling
* - access to OS environment variables
* - shell command
* - dynamic loading
* - dynamic C compilation
* - floating point environment setup
* - virtual memory statistics
* - filesystem path expansion
* - formatting of source code position
* - operations on I/O devices
*/
#define ___INCLUDED_FROM_OS
#define ___VERSION 406000
#include "gambit.h"
#include "os_base.h"
#include "os_time.h"
#include "os_shell.h"
#include "os_files.h"
#include "os_dyn.h"
#include "os_tty.h"
#include "os_io.h"
#include "setup.h"
#include "mem.h"
#include "c_intf.h"
/**********************************/
#ifdef ___DEBUG
#ifdef ___DEBUG_ALLOC_MEM_TRACE
#define ___alloc_mem(bytes) ___alloc_mem_debug(bytes,__LINE__,__FILE__)
#endif
#endif
/*---------------------------------------------------------------------------*/
#define NBELEMS(table)(sizeof (table) / sizeof (table[0]))
/*---------------------------------------------------------------------------*/
___SCMOBJ ___setup_os_interrupt_handling ___PVOID
{
___SCMOBJ e;
if ((e = ___setup_heartbeat_interrupt_handling ()) == ___FIX(___NO_ERR))
{
if ((e = ___setup_user_interrupt_handling ()) != ___FIX(___NO_ERR))
___cleanup_heartbeat_interrupt_handling ();
}
return e;
}
void ___cleanup_os_interrupt_handling ___PVOID
{
___cleanup_user_interrupt_handling ();
___cleanup_heartbeat_interrupt_handling ();
}
void ___disable_os_interrupts ___PVOID
{
___disable_heartbeat_interrupts ();
___disable_user_interrupts ();
}
void ___enable_os_interrupts ___PVOID
{
___enable_user_interrupts ();
___enable_heartbeat_interrupts ();
}
/*---------------------------------------------------------------------------*/
/* Virtual memory statistics. */
void ___vm_stats
___P((long *minflt,
long *majflt),
(minflt,
majflt)
long *minflt;
long *majflt;)
{
#ifndef USE_getrusage
*minflt = 0; /* can't get statistics... result is 0 */
*majflt = 0;
#endif
#ifdef USE_getrusage
struct rusage ru;
if (getrusage (RUSAGE_SELF, &ru) == 0)
{
*minflt = ru.ru_minflt;
*majflt = ru.ru_majflt;
}
else
{
*minflt = 0; /* can't get statistics... result is 0 */
*majflt = 0;
}
#endif
}
/*---------------------------------------------------------------------------*/
/* Formatting of source code position. */
char *___format_filepos
___P((char *path,
long filepos,
___BOOL pinpoint),
(path,
filepos,
pinpoint)
char *path;
long filepos;
___BOOL pinpoint;)
{
#ifdef USE_MACOS
#ifdef USE_mac_gui
if (pinpoint)
mac_gui_highlight (path, filepos);
#endif
#endif
return 0; /* Use default format for displaying location */
}
/* - - - - - - - - - - - - - - - - - - */
/* Miscellaneous networking utilities. */
#ifdef USE_NETWORKING
#ifdef AF_INET6
#define USE_IPV6
#endif
___HIDDEN int network_family_decode
___P((int family),
(family)
int family;)
{
switch (family)
{
#ifdef PF_INET
case -1:
return PF_INET;
#endif
#ifdef PF_INET6
case -2:
return PF_INET6;
#endif
}
return 0;
}
___HIDDEN ___SCMOBJ network_family_encode
___P((int family),
(family)
int family;)
{
switch (family)
{
#ifdef PF_INET
case PF_INET:
return ___FIX(-1);
#endif
#ifdef PF_INET6
case PF_INET6:
return ___FIX(-2);
#endif
}
return ___FIX(family);
}
___HIDDEN int network_socktype_decode
___P((int socktype),
(socktype)
int socktype;)
{
switch (socktype)
{
#ifdef SOCK_STREAM
case -1:
return SOCK_STREAM;
#endif
#ifdef SOCK_DGRAM
case -2:
return SOCK_DGRAM;
#endif
#ifdef SOCK_RAW
case -3:
return SOCK_RAW;
#endif
}
return 0;
}
___HIDDEN ___SCMOBJ network_socktype_encode
___P((int socktype),
(socktype)
int socktype;)
{
switch (socktype)
{
#ifdef SOCK_STREAM
case SOCK_STREAM:
return ___FIX(-1);
#endif
#ifdef SOCK_DGRAM
case SOCK_DGRAM:
return ___FIX(-2);
#endif
#ifdef SOCK_RAW
case SOCK_RAW:
return ___FIX(-3);
#endif
}
return ___FIX(socktype);
}
___HIDDEN int network_protocol_decode
___P((int protocol),
(protocol)
int protocol;)
{
switch (protocol)
{
#ifdef IPPROTO_UDP
case -1:
return IPPROTO_UDP;
#endif
#ifdef IPPROTO_TCP
case -2:
return IPPROTO_TCP;
#endif
}
return 0;
}
___HIDDEN ___SCMOBJ network_protocol_encode
___P((int protocol),
(protocol)
int protocol;)
{
switch (protocol)
{
#ifdef IPPROTO_UDP
case IPPROTO_UDP:
return ___FIX(-1);
#endif
#ifdef IPPROTO_TCP
case IPPROTO_TCP:
return ___FIX(-2);
#endif
}
return ___FIX(protocol);
}
___SCMOBJ ___SCMOBJ_to_in_addr
___P((___SCMOBJ addr,
struct in_addr *ia,
int arg_num),
(addr,
ia,
arg_num)
___SCMOBJ addr;
struct in_addr *ia;
int arg_num;)
{
if (addr == ___FAL)
ia->s_addr = htonl (INADDR_ANY); /* wildcard address */
else
ia->s_addr = htonl ((___INT(___U8VECTORREF(addr,___FIX(0)))<<24) +
(___INT(___U8VECTORREF(addr,___FIX(1)))<<16) +
(___INT(___U8VECTORREF(addr,___FIX(2)))<<8) +
___INT(___U8VECTORREF(addr,___FIX(3))));
return ___FIX(___NO_ERR);
}
___SCMOBJ ___in_addr_to_SCMOBJ
___P((struct in_addr *ia,
int arg_num),
(ia,
arg_num)
struct in_addr *ia;
int arg_num;)
{
unsigned long a;
___SCMOBJ result;
a = ntohl (ia->s_addr);
if (a == INADDR_ANY)
result = ___FAL; /* wildcard address */
else
{
result = ___alloc_scmobj (___sU8VECTOR, 4, ___STILL);
if (___FIXNUMP(result))
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+arg_num);
___U8VECTORSET(result,___FIX(0),___FIX((a>>24) & 0xff))
___U8VECTORSET(result,___FIX(1),___FIX((a>>16) & 0xff))
___U8VECTORSET(result,___FIX(2),___FIX((a>>8) & 0xff))
___U8VECTORSET(result,___FIX(3),___FIX(a & 0xff))
}
return result;
}
#ifdef USE_IPV6
___SCMOBJ ___SCMOBJ_to_in6_addr
___P((___SCMOBJ addr,
struct in6_addr *ia,
int arg_num),
(addr,
ia,
arg_num)
___SCMOBJ addr;
struct in6_addr *ia;
int arg_num;)
{
int i;
if (addr == ___FAL)
{
/* wildcard address */
for (i=0; i<8; i++)
{
ia->s6_addr[i<<1] = 0;
ia->s6_addr[(i<<1)+1] = 0;
}
}
else
{
for (i=0; i<8; i++)
{
___U16 x = ___INT(___U16VECTORREF(addr,___FIX(i)));
ia->s6_addr[i<<1] = (x>>8) & 0xff;
ia->s6_addr[(i<<1)+1] = x & 0xff;
}
}
return ___FIX(___NO_ERR);
}
___SCMOBJ ___in6_addr_to_SCMOBJ
___P((struct in6_addr *ia,
int arg_num),
(ia,
arg_num)
struct in6_addr *ia;
int arg_num;)
{
int i;
___SCMOBJ result;
for (i=0; i<16; i++)
if (ia->s6_addr[i] != 0)
break;
if (i == 16)
result = ___FAL; /* wildcard address */
else
{
result = ___alloc_scmobj (___sU16VECTOR, 8<<1, ___STILL);
if (___FIXNUMP(result))
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+arg_num);
for (i=0; i<8; i++)
___U16VECTORSET
(result,
___FIX(i),
___FIX((___CAST(___U16,ia->s6_addr[i<<1])<<8) +
ia->s6_addr[(i<<1)+1]))
}
return result;
}
#endif
___SCMOBJ ___SCMOBJ_to_sockaddr
___P((___SCMOBJ addr,
___SCMOBJ port_num,
struct sockaddr *sa,
int *salen,
int arg_num),
(addr,
port_num,
sa,
salen,
arg_num)
___SCMOBJ addr;
___SCMOBJ port_num;
struct sockaddr *sa;
int *salen;
int arg_num;)
{
___SCMOBJ result;
___SCMOBJ ___temp; /* needed by the ___U8VECTORP and ___U16VECTORP macros */
if (addr == ___FAL || ___U8VECTORP(addr))
{
struct sockaddr_in *sa_in = ___CAST(struct sockaddr_in*,sa);
*salen = sizeof (*sa_in);
memset (sa_in, 0, sizeof (*sa_in));
sa_in->sin_family = AF_INET;
sa_in->sin_port = htons (___INT(port_num));
result = ___SCMOBJ_to_in_addr (addr, &sa_in->sin_addr, arg_num);
}
#ifdef USE_IPV6
else if (___U16VECTORP(addr))
{
struct sockaddr_in6 *sa_in6 = ___CAST(struct sockaddr_in6*,sa);
*salen = sizeof (*sa_in6);
memset (sa_in6, 0, sizeof (*sa_in6));
sa_in6->sin6_family = AF_INET6;
sa_in6->sin6_port = htons (___INT(port_num));
result = ___SCMOBJ_to_in6_addr (addr, &sa_in6->sin6_addr, arg_num);
}
#endif
else
result = ___FIX(___UNKNOWN_ERR);
return result;
}
___SCMOBJ ___sockaddr_to_SCMOBJ
___P((struct sockaddr *sa,
int salen,
int arg_num),
(sa,
salen,
arg_num)
struct sockaddr *sa;
int salen;
int arg_num;)
{
___SCMOBJ result;
result = ___make_vector (4, ___FAL, ___STILL);
if (___FIXNUMP(result))
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+arg_num);
if (salen == sizeof (struct sockaddr_in))
{
struct sockaddr_in *sa_in = ___CAST(struct sockaddr_in*,sa);
___SCMOBJ addr = ___in_addr_to_SCMOBJ (&sa_in->sin_addr, arg_num);
if (___FIXNUMP(addr))
{
___release_scmobj (result);
return addr;
}
___FIELD(result,1) = network_family_encode (sa_in->sin_family);
___FIELD(result,2) = ___FIX(ntohs (sa_in->sin_port));
___FIELD(result,3) = addr;
___release_scmobj (addr);
}
#ifdef USE_IPV6
else if (salen == sizeof (struct sockaddr_in6))
{
struct sockaddr_in6 *sa_in6 = ___CAST(struct sockaddr_in6*,sa);
___SCMOBJ addr = ___in6_addr_to_SCMOBJ (&sa_in6->sin6_addr, arg_num);
if (___FIXNUMP(addr))
{
___release_scmobj (result);
return addr;
}
___FIELD(result,1) = network_family_encode (sa_in6->sin6_family);
___FIELD(result,2) = ___FIX(ntohs (sa_in6->sin6_port));
___FIELD(result,3) = addr;
___release_scmobj (addr);
}
#endif
else
result = ___FAL;
___release_scmobj (result);
return result;
}
___SCMOBJ ___addr_to_SCMOBJ
___P((void *sa,
int salen,
int arg_num),
(sa,
salen,
arg_num)
void *sa;
int salen;
int arg_num;)
{
___SCMOBJ result;
if (salen == 4)
{
struct in_addr *ia = ___CAST(struct in_addr*,sa);
___U32 a;
result = ___alloc_scmobj (___sU8VECTOR, 4, ___STILL);
if (___FIXNUMP(result))
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+arg_num);
a = ntohl (ia->s_addr);
___U8VECTORSET(result,___FIX(0),___FIX((a>>24)&0xff))
___U8VECTORSET(result,___FIX(1),___FIX((a>>16)&0xff))
___U8VECTORSET(result,___FIX(2),___FIX((a>>8)&0xff))
___U8VECTORSET(result,___FIX(3),___FIX(a&0xff))
}
#ifdef USE_IPV6
else if (salen == 16)
{
struct in6_addr *ia = ___CAST(struct in6_addr*,sa);
int i;
result = ___alloc_scmobj (___sU16VECTOR, 8<<1, ___STILL);
if (___FIXNUMP(result))
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+arg_num);
for (i=0; i<8; i++)
___U16VECTORSET(result,
___FIX(i),
___FIX((___CAST(___U16,ia->s6_addr[i<<1])<<8)
+ia->s6_addr[(i<<1)+1]))
}
#endif
else
result = ___FAL;
___release_scmobj (result);
return result;
}
#endif
/* - - - - - - - - - - - - - - - - - - */
/* Access to host information. */
#ifdef USE_getaddrinfo
___HIDDEN int ai_flags_decode
___P((int flags),
(flags)
int flags;)
{
int ai_flags = 0;
#ifdef AI_PASSIVE
if (flags & 1)
ai_flags |= AI_PASSIVE;
#endif
#ifdef AI_CANONNAME
if (flags & 2)
ai_flags |= AI_CANONNAME;
#endif
#ifdef AI_NUMERICHOST
if (flags & 4)
ai_flags |= AI_NUMERICHOST;
#endif
#ifdef AI_NUMERICSERV
if (flags & 8)
ai_flags |= AI_NUMERICSERV;
#endif
#ifdef AI_ALL
if (flags & 16)
ai_flags |= AI_ALL;
#endif
#ifdef AI_ADDRCONFIG
if (flags & 32)
ai_flags |= AI_ADDRCONFIG;
#endif
#ifdef AI_V4MAPPED
if (flags & 64)
ai_flags |= AI_V4MAPPED;
#endif
return ai_flags;
}
#endif
___SCMOBJ ___os_address_infos
___P((___SCMOBJ host,
___SCMOBJ serv,
___SCMOBJ flags,
___SCMOBJ family,
___SCMOBJ socktype,
___SCMOBJ protocol),
(host,
serv,
flags,
family,
socktype,
protocol)
___SCMOBJ host;
___SCMOBJ serv;
___SCMOBJ flags;
___SCMOBJ family;
___SCMOBJ socktype;
___SCMOBJ protocol;)
{
#ifndef USE_getaddrinfo
return ___FIX(___UNIMPL_ERR);
#endif
#ifdef USE_getaddrinfo
___SCMOBJ e;
___SCMOBJ vect;
___SCMOBJ lst;
___SCMOBJ tail;
___SCMOBJ x;
___SCMOBJ p;
int i;
char *chost = 0;
char *cserv = 0;
struct addrinfo hints, *res, *res0;
int code;
if ((e = ___SCMOBJ_to_CHARSTRING (host, &chost, 1))
!= ___FIX(___NO_ERR))
return e;
if ((e = ___SCMOBJ_to_CHARSTRING (serv, &cserv, 2))
!= ___FIX(___NO_ERR))
{
___release_string (chost);
return e;
}
memset (&hints, 0, sizeof (hints));
hints.ai_flags = ai_flags_decode (___INT(flags));
hints.ai_family = network_family_decode (___INT(family));
hints.ai_socktype = network_socktype_decode (___INT(socktype));
hints.ai_protocol = network_protocol_decode (___INT(protocol));
code = getaddrinfo (chost, cserv, &hints, &res0);
if (code != 0)
{
e = err_code_from_gai_code (code);
___release_string (chost);
___release_string (cserv);
return e;
}
lst = ___NUL;
tail = ___FAL;
for (res = res0; res != NULL; res = res->ai_next)
{
x = ___sockaddr_to_SCMOBJ (res->ai_addr,
res->ai_addrlen,
___RETURN_POS);
if (___FIXNUMP(x))
{
___release_scmobj (lst);
freeaddrinfo (res0);
return x;
}
if (x != ___FAL)
{
vect = ___make_vector (5, ___FAL, ___STILL);
if (___FIXNUMP(vect))
{
___release_scmobj (x);
___release_scmobj (lst);
freeaddrinfo (res0);
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+___RETURN_POS);
}
___FIELD(vect,1) = network_family_encode (res->ai_family);
___FIELD(vect,2) = network_socktype_encode (res->ai_socktype);
___FIELD(vect,3) = network_protocol_encode (res->ai_protocol);
___FIELD(vect,4) = x;
___release_scmobj (x);
p = ___make_pair (vect, ___NUL, ___STILL);
___release_scmobj (vect);
if (___FIXNUMP(p))
{
___release_scmobj (lst);
freeaddrinfo (res0);
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+___RETURN_POS);
}
if (lst == ___NUL)
lst = p;
else
___SETCDR(tail,p);
tail = p;
}
}
___release_scmobj (lst);
freeaddrinfo (res0);
___release_string (chost);
___release_string (cserv);
return lst;
#endif
}
___SCMOBJ ___os_host_info
___P((___SCMOBJ host),
(host)
___SCMOBJ host;)
{
#ifndef USE_gethostbyname
return ___FIX(___UNIMPL_ERR);
#endif
#ifdef USE_gethostbyname
___SCMOBJ e;
___SCMOBJ vect;
___SCMOBJ lst;
___SCMOBJ x;
___SCMOBJ p;
int i;
struct hostent *he = 0;
char *chost = 0;
___SCMOBJ ___temp; /* needed by the ___U8VECTORP and ___U16VECTORP macros */
#ifdef USE_POSIX
errno = 0; /* in case the h_errno ends up being NETDB_SUCCESS
* incorrectly which will be treated as NETDB_INTERNAL
* (see err_code_from_h_errno)
*/
#endif
#ifdef USE_gethostbyaddr
if (___U8VECTORP(host))
{
struct in_addr ia;
if ((e = ___SCMOBJ_to_in_addr (host, &ia, 1)) != ___FIX(___NO_ERR))
return e;
he = gethostbyaddr (___CAST(char*,&ia), 4, AF_INET);
}
#ifdef USE_IPV6
else if (___U16VECTORP(host))
{
struct in6_addr ia;
if ((e = ___SCMOBJ_to_in6_addr (host, &ia, 1)) != ___FIX(___NO_ERR))
return e;
he = gethostbyaddr (___CAST(char*,&ia), 16, AF_INET6);
}
#endif
else
#endif
{
/*
* Convert the Scheme string to a C "char*" string. If an
* invalid character is seen then return an error.
*/
if ((e = ___SCMOBJ_to_NONNULLCHARSTRING (host, &chost, 1))
!= ___FIX(___NO_ERR))
return e;
#ifdef USE_inet_pton
{
struct in_addr ia;
if (inet_pton (AF_INET, chost, &ia) == 1)
he = gethostbyaddr (___CAST(char*,&ia), 4, AF_INET);
}
#ifdef USE_IPV6
if (he == 0)
{
struct in6_addr ia;
if (inet_pton (AF_INET6, chost, &ia) == 1)
he = gethostbyaddr (___CAST(char*,&ia), 16, AF_INET6);
}
#endif
if (he == 0)
#endif
{
he = gethostbyname (chost);
}
}
if (he == 0)
{
#ifdef USE_POSIX
e = err_code_from_h_errno ();
#endif
#ifdef USE_WIN32
e = err_code_from_WSAGetLastError ();
#endif
}
___release_string (chost);
if (e != ___FIX(___NO_ERR))
return e;
vect = ___make_vector (4, ___FAL, ___STILL);
if (___FIXNUMP(vect))
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+___RETURN_POS);
/* convert h_name to string */
if ((e = ___CHARSTRING_to_SCMOBJ
(___CAST(char*,he->h_name),
&x,
___RETURN_POS))
!= ___FIX(___NO_ERR))
{
___release_scmobj (vect);
return e;
}
___FIELD(vect,1) = x;
___release_scmobj (x);
/* convert h_aliases to strings */
i = 0;
while (he->h_aliases[i] != 0)
i++;
lst = ___NUL;
while (i-- > 0)
{
if ((e = ___CHARSTRING_to_SCMOBJ
(___CAST(char*,he->h_aliases[i]),
&x,
___RETURN_POS))
!= ___FIX(___NO_ERR))
{
___release_scmobj (lst);
___release_scmobj (vect);
return e;
}
p = ___make_pair (x, lst, ___STILL);
___release_scmobj (x);
___release_scmobj (lst);
if (___FIXNUMP(p))
{
___release_scmobj (vect);
return ___FIX(___CTOS_HEAP_OVERFLOW_ERR+___RETURN_POS);
}
lst = p;
}
___FIELD(vect,2) = lst;
___release_scmobj (lst);
/* convert h_addr_list to u8/u16vectors */
i = 0;
while (he->h_addr_list[i] != 0)
i++;
lst = ___NUL;
while (i-- > 0)
{
switch (he->h_addrtype)
{
case AF_INET:
{
x = ___in_addr_to_SCMOBJ
(___CAST(struct in_addr*,he->h_addr_list[i]),
___RETURN_POS);
break;
}
#ifdef USE_IPV6
case AF_INET6:
{
x = ___in6_addr_to_SCMOBJ
(___CAST(struct in6_addr*,he->h_addr_list[i]),