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gno/lib/libc/sys/syscall.c

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/*
* libc/sys/syscall.c
*
* System Call (Trap) Interface. This file contains those functions
* which are in Chapter 2 but emulate system traps as opposed to directly
* trapping to the GNO kernel. The actual kernel trap calls are in trap.c
* There are also a few support routines in here.
*
* Unless otherwise specified, see the respective man pages for details
* about these routines.
*
* $Id: syscall.c,v 1.6 1997/12/21 20:13:19 gdr Exp $
*
* This file is formatted with tab stops every 3 columns.
*/
#ifdef __ORCAC__
segment "libc_sys__";
#endif
#define __USE_DYNAMIC_GSSTRING__
/*
* Use bits 0, 1, 2, 6 (== decimal 71) for optimization. In Orca/C v2.1.0,
* bits 4 and 5 are still reported to be buggy.
*
* Around variadic routines, we also add in optimization bit 3 (== 79).
*/
#include <sys/syslimits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <types.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <gsos.h>
#include <string.h>
#include <stdio.h>
#include <orca.h>
#include <limits.h>
#include <signal.h>
#include <gno/gno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <sys/mount.h>
#include <misctool.h>
/*
* This is the maximum file name length allowed to be returned by GS/OS
* in these stubs.
*/
#define GSOS_NAME_MAX PATH_MAX
/* these are prototyped in the Orca/C manual, but not in any header */
extern pascal void SystemQuitFlags (unsigned int);
extern pascal void SystemQuitPath (GSStringPtr);
/* these are the access bits to the GS/OS Create call */
#define GSOS_READ 0x0001
#define GSOS_WRITE 0x0002
#define GSOS_INVISIBLE 0x0004
#define GSOS_BACKUP 0x0020
#define GSOS_RENAME 0x0040
#define GSOS_DESTROY 0x0080
/* file types and, for EXEC, the auxtype */
#define TXT 0x04 /* text file */
#define BIN 0x06 /* binary file */
#define EXE 0xB5 /* shell command */
#define DIR 0x0F /* directory */
#define S16 0xB3 /* system file (application) */
#define SRC 0xB0 /* SRC + EXEC = shell script */
#define EXEC 0x0006
#ifdef VERSION_CHECK
static void _libcPanic (const char *fmt, ...);
#endif
/*
* _chdir
*
* chdir and fchdir are implemented in terms of this function. Note that
* <pathname> _might_ be changed by _chdir() -- if an error occurs setting
* prefix 0, then the length of <pathname> will be set to zero.
*/
static int
_chdir(GSStringPtr pathname) {
PrefixRecGS prefx;
struct { /* truncated version of GetFileInfoRec */
word pCount;
GSStringPtr pathname;
word access;
word fileType;
longword auxType;
word storageType;
} shortFileInfo;
int err;
/* make sure it's a directory */
shortFileInfo.pCount = 5;
shortFileInfo.pathname = pathname;
GetFileInfoGS(&shortFileInfo);
if ((errno = _mapErr(_toolErr)) != 0) {
return -1;
}
if (shortFileInfo.storageType != 0x0d && /* subdirectory */
shortFileInfo.storageType != 0x0f) { /* volume directory */
errno = ENOTDIR;
return -1;
}
prefx.pCount = 2;
prefx.prefixNum = 8;
prefx.buffer.setPrefix = shortFileInfo.pathname;
SetPrefixGS(&prefx);
if ((errno = _mapErr(_toolErr)) != 0) {
return -1;
}
prefx.prefixNum = 0;
if (prefx.buffer.setPrefix->length < 64) {
SetPrefixGS(&prefx);
if (_toolErr == 0) {
return 0;
}
}
prefx.buffer.setPrefix->length = 0;
SetPrefixGS(&prefx);
return 0;
}
#define CHMOD_MODE 1
#define CHMOD_TYPE 2
#define CHMOD_AUXTYPE 4
static int
_chmod (unsigned short op, GSStringPtr path, mode_t mode, unsigned short type,
unsigned long auxtype) {
FileInfoRecGS *infop;
int err;
if ((infop = malloc(sizeof(FileInfoRecGS))) == NULL) {
return -1;
}
infop->pCount = 4;
infop->pathname = path;
/* get the original data */
GetFileInfoGS(infop);
if (_toolErr) {
err = _toolErr;
free(infop);
errno = _mapErr(err);
return -1;
}
/*
* Special case: If the type is TXT or SRC, *and* the S_IXUSR bit
* is set, *and* this is a "UNIX" mode, *and* no filetype or auxtype
* was specified, then change the type to SRC and the AUXTYPE to EXEC.
*/
if (((op & (CHMOD_TYPE | CHMOD_AUXTYPE)) == 0) &&
(mode & S_IXUSR) &&
_getModeEmulation() &&
(infop->fileType == TXT || infop->fileType == SRC))
{
infop->fileType = SRC;
infop->auxType = EXEC;
}
/* modify it */
if (op & CHMOD_MODE) {
infop->access = _mapMode2GS(mode);
}
if (op & CHMOD_TYPE) {
infop->fileType = type;
}
if (op & CHMOD_AUXTYPE) {
infop->auxType = auxtype;
}
/* set the info and return */
SetFileInfoGS(infop);
err = _toolErr;
free(infop);
if (err) {
errno = _mapErr(err);
return -1;
} else {
return 0;
}
}
/*
* _kernMinVersion
*
* This is used as an assert from within trap.asm (unless the global short
* _kernDisableVersionCheck is set to a non-zero value. It's argument is
* the kernel version required by the given system call. Returns on success.
* On failure, it aborts the program with a suitable error message.
*
* It would be more efficient as an inline macro.
*
* THIS ROUTINE IS CURRENTLY DISABLED DUE TO PERFORMANCE CONCERNS. SEE
* THE gno-devel MAILING LIST ARCHIVE FOR DETAILS.
*/
#ifdef VERSION_CHECK
unsigned short _kernDisableVersionCheck;
void
_kernMinVersion (unsigned int required) {
static int gnoActiveKnown = 0;
static u_short gnoVersion = 0;
/* make sure GNO is active */
if (! gnoActiveKnown) {
kernStatus();
if (_toolErr) {
_libcPanic("This program requires GNO.\n");
/*NOTREACHED*/
}
gnoActiveKnown = 1;
}
/* get the current kernel version if we don't already have it */
if (gnoVersion == 0) {
gnoVersion = kernVersion();
}
/* make sure our version meets the minimum required */
if (required > gnoVersion) {
_libcPanic ("This program requires GNO v%d.%d.%d or later\n",
(required & 0xFF00) >> 8,
(required & 0x00F0) >> 4,
(required & 0x000F));
}
return;
}
#endif
/*
* _setFdTranslation, _getFdTranslation
*
* Does newline translation occur for read/write calls on the specified
* file descriptor? Off by default. Returns previous value for the
* specified fd.
*
* If by any chance we manage to open more than OPEN_MAX files, then
* translation is always off for those file descriptors.
*/
static int fdTranslationTable[OPEN_MAX];
#define _getFdTranslation(fd) \
(((fd) >= 0) && ((fd) < OPEN_MAX) && fdTranslationTable[fd])
static int
_setFdTranslation(int fd, int isOn) {
int oldval;
if (fd < 0 || fd >= OPEN_MAX) {
return 0;
}
oldval = fdTranslationTable[fd];
fdTranslationTable[fd] = (isOn != 0);
return oldval;
}
/*
* _statfs
*
* _statfs is a routine common to both statfs and fstatfs. The first
* parameter, gstr, is a pointer to a GSString containing the pathname.
* Other than the type of the first argument, this call is identical
* to the regular definition of statfs.
*/
static int
_statfs (GSStringPtr gstr, struct statfs *buf) {
DevNumRecGS gd;
VolumeRecGS vo;
char printbuf[20]; /* device name in .dxx format */
int err;
/* get the volume number for the file name gstr */
gd.pCount = 2;
gd.devName = gstr; /* does this work with a pathname? */
GetDevNumberGS(&gd);
if (_toolErr) {
errno = _mapErr(_toolErr);
return -1;
}
/* get the other volume info */
vo.pCount = 6;
sprintf(printbuf,".d%d", gd.devNum);
vo.devName = __C2GSMALLOC(printbuf);
vo.volName = (ResultBuf255Ptr) GOinit(32, NULL);
VolumeGS(&vo);
err = _toolErr;
/* copy over our information */
buf->f_type = (long) vo.fileSysID; /* FST type */
buf->f_bsize = (long) vo.blockSize; /* size of blocks in filesystem */
buf->f_blocks = vo.totalBlocks; /* number of blocks on the volume */
buf->f_bfree = vo.freeBlocks; /* number of free blocks */
buf->f_bavail = vo.freeBlocks; /* none reserved for superuser */
buf->f_files = -1; /* undefined by this filesystem */
buf->f_ffree = -1; /* undefined by this filesystem */
buf->f_fsid.hi = 0;
buf->f_fsid.lo = gd.devNum; /* device number */
buf->f_spare[0] = -1;
buf->f_spare[1] = -1;
buf->f_spare[2] = -1;
buf->f_spare[3] = -1;
buf->f_spare[4] = -1;
buf->f_spare[5] = -1;
buf->f_spare[6] = -1;
/* clean up, set up return conditions */
GOfree(vo.volName);
free(vo.devName);
if (err) {
errno = _mapErr(err);
return -1;
}
return 0;
}
/*
* access -- a replacement for the GNO v2.0.4 one; this one will actually
* return 0 when testing X_OK on a directory.
*
* This function uses gotos. Too bad; sometimes it's more efficient.
*/
int
access (const char *name, int mode) {
FileInfoRecGS *recptr;
GSStringPtr gptr;
size_t len;
int i;
int result = 0;
/* verify validity of args */
if (!name || !*name) { /* for SYSV */
errno=ENOENT;
return -1;
}
len = strlen(name);
if (len >= USHRT_MAX || (mode & ~(R_OK|W_OK|X_OK|F_OK))) {
errno = EINVAL;
return -1;
}
/* allocate and initialize the GS/OS variables */
if ((gptr = GIinit(len, name)) == NULL) {
errno = ENOMEM;
return -1;
}
if ((recptr = malloc(sizeof(FileInfoRecGS))) == NULL) {
GIfree(gptr);
errno = ENOMEM;
return -1;
}
recptr->pCount = 4;
recptr->pathname = gptr;
/* get the info and check for errors */
GetFileInfoGS(recptr);
i = toolerror();
if (i) {
errno = _mapErr(i);
result = -1;
goto done;
}
/* check read permission */
if ((mode & R_OK) && !(recptr->access & GSOS_READ)) {
errno = EACCES;
result = -1;
goto done;
}
/* check write permission */
if ((mode & W_OK) &&
!((recptr->access & GSOS_WRITE) &&
(recptr->access & GSOS_RENAME) &&
(recptr->access & GSOS_DESTROY))) {
errno = EACCES;
result = -1;
goto done;
}
/*
* Check execute mode. This is true if:
* the file is a directory;
* the file is a shell command;
* the file is a shell script;
* the file is a S16 file;
* But NOT if
* the file is a SYS or other type of file.
*/
if ((mode & X_OK) &&
!((recptr->fileType == EXE) ||
(recptr->fileType == DIR) ||
(recptr->fileType == SRC && recptr->auxType == EXEC) ||
(recptr->fileType == S16))) {
errno = EACCES;
result = -1;
}
done:
GIfree(gptr);
free(recptr);
return result;
}
/*
* chdir
*/
int
chdir (const char *pathname) {
GSStringPtr pathnameGS;
int result, err;
if ((pathnameGS = __C2GSMALLOC(pathname)) == NULL) {
errno = ENOMEM;
return -1;
}
result = _chdir(pathnameGS);
err = errno;
free(pathnameGS);
if (result != 0) {
errno = err;
}
return result;
}
/*
* chmod
*/
int
chmod (const char *pathname, mode_t mode) {
GSStringPtr pathnameGS;
int result, err;
if ((pathnameGS = __C2GSMALLOC(pathname)) == NULL) {
errno = ENOMEM;
return -1;
}
result = _chmod(CHMOD_MODE, pathnameGS, mode, 0, 0L);
err = errno;
free(pathnameGS);
if (result != 0) {
errno = err;
}
return result;
}
/*
* close
*/
int
close (int filds) {
int cl[2] = {1, filds};
int err;
_setFdTranslation(filds, 0);
CloseGS(cl);
if (_toolErr) {
errno = _mapErr(_toolErr);
return -1;
}
return 0;
}
/*
* creat
*/
int
creat(const char *path, mode_t mode) {
return open (path, O_CREAT | O_TRUNC | O_WRONLY, mode);
}
/*
* fchdir
*/
int
fchdir (int fd)
{
RefInfoRecGS inforec;
int err, result;
/* get the pathname based on the file descriptor */
inforec.pCount = 3;
inforec.refNum = fd;
inforec.pathname = (ResultBuf255Ptr) GOinit(GSOS_NAME_MAX, NULL);
GetRefInfoGS (&inforec);
if ((err = _mapErr(_toolErr)) != 0) {
GOfree(inforec.pathname);
errno = err;
return -1;
}
/* change directory */
result = _chdir(&(inforec.pathname->bufString));
err = errno;
GOfree(inforec.pathname);
errno = err;
return result;
}
/*
* fchmod
*/
int
fchmod (int fd, mode_t mode)
{
RefInfoRecGS inforec;
int err, result;
/* get the pathname based on the file descriptor */
inforec.pCount = 3;
inforec.refNum = fd;
inforec.pathname = (ResultBuf255Ptr) GOinit(GSOS_NAME_MAX, NULL);
GetRefInfoGS (&inforec);
if ((err = _mapErr(_toolErr)) != 0) {
GOfree(inforec.pathname);
errno = err;
return -1;
}
/* change the mode */
result = _chmod(CHMOD_MODE, &(inforec.pathname->bufString), mode, 0, 0L);
err = errno;
GOfree(inforec.pathname);
errno = err;
return result;
}
/*
* fstatfs
*/
int
fstatfs (int fd, struct statfs *buf)
{
RefInfoRecGS inforec;
int err, result;
/* get the pathname based on the file descriptor */
inforec.pCount = 3;
inforec.refNum = fd;
inforec.pathname = (ResultBuf255Ptr) GOinit(GSOS_NAME_MAX, NULL);
GetRefInfoGS (&inforec);
if ((err = _mapErr(_toolErr)) != 0) {
GOfree(inforec.pathname);
errno = err;
return -1;
}
/* _statfs does the rest */
result = _statfs(&(inforec.pathname->bufString), buf);
err = errno;
GOfree(inforec.pathname);
errno = err;
return result;
}
/*
* fsync
*/
int
fsync(int fd) {
short ff[2];
ff[0] = 1;
ff[1] = fd;
FlushGS(ff);
if (_toolErr) {
errno = _mapErr(_toolErr);
return -1;
}
return 0;
}
/*
* ftruncate
*/
int
ftruncate(int fd, off_t length)
{
SetPositionRecGS p;
p.pCount = 3;
p.base = 0;
p.refNum = fd;
p.displacement = length;
SetEOFGS(&p);
if (_toolErr) {
errno = _mapErr(_toolErr);
return -1;
}
return 0;
}
/*
* getdtablesize
*/
int
getdtablesize (void) {
return OPEN_MAX;
}
/*
* getpgrp
*/
pid_t
getpgrp (void) {
return _getpgrp(getpid());
}
/*
* gettimeofday
*
* IIgs HACK! HACK! HACK! We need a real gettimeofday!
* The implementation for settimeofday is a start, but we're not currently
* handling timezones properly.
*/
int
gettimeofday (struct timeval *tp, struct timezone *tzp) {
tp->tv_sec = time(NULL);
tp->tv_usec = 0l;
}
/*
* lseek
*/
off_t
lseek(int filds, off_t offset, int whence) {
SetPositionRecGS s;
PositionRecGS m;
EOFRecGS e;
int err;
e.pCount = m.pCount = 2;
e.refNum = s.refNum = m.refNum = filds;
GetEOFGS(&e);
if (err = _mapErr(_toolErr)) {
errno = err;
return -1L;
}
GetMarkGS(&m);
s.pCount = 3;
s.base = 0;
switch (whence) {
case SEEK_SET: s.displacement = offset; break;
case SEEK_CUR: s.displacement = m.position + offset; break;
case SEEK_END: s.displacement = e.eof + offset; break;
default:
errno = EINVAL;
return -1L;
}
if (s.displacement < 0) {
errno = EINVAL;
return -1L;
}
if (s.displacement > e.eof) {
SetEOFGS(&s);
if (err = _mapErr(_toolErr)) {
errno = err;
return -1L;
}
}
SetMarkGS(&s);
if (err = _mapErr(_toolErr)) {
errno = err;
return -1L;
}
return s.displacement;
}
/*
* mkdir
*/
int
mkdir(char *dirname)
{
CreateRecGS cr;
int err;
cr.pCount = 5;
cr.pathname = __C2GSMALLOC(dirname);
if (cr.pathname == NULL) {
errno = ENOMEM;
return -1;
}
cr.access = 0xC3;
cr.fileType = 0x0F;
cr.auxType = 0L;
cr.storageType = 0x0D;
CreateGS(&cr);
err = _toolErr;
free(cr.pathname);
if (err) {
errno = _mapErr(err);
return -1;
}
errno = 0;
return 0;
}
/*
* raise -- This routine has been moved into ORCALib so that we can avoid
* backward references through abort(3), which the current linker
* (ZapLink) cannot handle.
*/
#if 0
int
raise (int sig) {
return kill (getpid(), sig);
}
#endif
/*
* read
*/
ssize_t
read (int filds, void *buf, size_t bytecount) {
IORecGS iorec = {4, filds, buf, (long) bytecount, 0L};
char *p;
size_t i;
int err;
ssize_t result;
/* read in the buffer */
ReadGS(&iorec);
if (_toolErr == 0 || _toolErr == 0x4C) {
result = (size_t) iorec.transferCount;
} else if (err = _mapErr(_toolErr)) {
errno = err;
return -1;
}
/* translate newlines if necessary */
if (_getFdTranslation(filds)) {
p = (char *) buf;
for (i = 0; i < result; i++, p++) {
if (*p == '\r') {
*p = '\n';
}
}
}
return result;
}
/*
* rename
*/
int
rename (const char *from, const char *to) {
struct {
word pCount;
GSStringPtr from;
GSStringPtr to;
} renblock;
struct stat sfrom, sto;
int ret2;
if (stat(from, &sfrom) < 0) {
return -1;
}
ret2 = stat(to, &sto);
if ((ret2 < 0) && (errno != ENOENT)) {
/* problem stat'ing destination */
return -1;
}
/* make sure the source and destination (if it exists) are of the same type */
if (ret2 == 0) {
if (S_ISDIR(sfrom.st_mode) && ! S_ISDIR(sto.st_mode)) {
errno = ENOTDIR;
return -1;
}
if (S_ISDIR(sto.st_mode) && ! S_ISDIR(sfrom.st_mode)) {
errno = EISDIR;
return -1;
}
if (unlink(to) < 0) {
if (errno == EACCES) {
errno = EEXIST; /* proper POSIX side effect */
}
return -1;
}
}
/* get GS/OS-style copies of the filenames */
renblock.pCount = 2;
if ((renblock.from = __C2GSMALLOC(from)) == NULL) {
errno = ENOMEM;
return -1;
}
if ((renblock.to = __C2GSMALLOC(to)) == NULL) {
GIfree(renblock.from);
errno = ENOMEM;
return -1;
}
ChangePathGS(&renblock);
ret2 = _toolErr;
GIfree(renblock.from);
GIfree(renblock.to);
if (ret2) {
errno = _mapErr(ret2);
return -1;
} else {
return 0;
}
}
/*
* rexit
*/
void
rexit (int code) {
SystemQuitFlags (0x4000);
SystemQuitPath (NULL);
exit(code);
}
/*
* rmdir
*/
int
rmdir (const char *path) {
struct {
Word pCount;
GSStringPtr pathname;
Word access;
Word fileType;
LongWord auxType;
Word storageType;
} frec;
int result;
/* make a GSString copy of path */
frec.pCount=5;
if ((frec.pathname = __C2GSMALLOC(path)) == NULL) {
errno = ENOMEM;
return -1;
}
/* check to ensure that it's a directory */
GetFileInfoGS(&frec);
if ((result = _toolErr) != 0) {
GIfree(frec.pathname);
errno = _mapErr(result);
return -1;
}
if (frec.storageType != 0x0D) {
/* not a directory */
GIfree(frec.pathname);
/* volume directory, or plain file? */
errno = (frec.storageType == 0x0F) ? EPERM : ENOTDIR;
return -1;
}
/* it's a directory; try to delete it */
frec.pCount=1;
DestroyGS(&frec);
result = _toolErr;
GIfree(frec.pathname);
if (result != 0) {
errno = _mapErr(result);
result = -1;
}
return result;
}
/*
* settimeofday
*
* This implementation is not complete; it doesn't currently handle
* timezone information.
*/
#define SECS_PER_YEAR 31536000 /* number of seconds in 365 days */
int
settimeofday (struct timeval *tp, struct timezone *notused)
{
Byte month, day, curYear, hour, minute, second;
long mytime;
int i, year;
HexTime hextime;
int monthanddays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31};
if (geteuid() != 0) {
/* not superuser */
errno = EPERM;
return -1;
}
if (tp == NULL) {
/* No time specified */
return 0;
}
mytime = tp->tv_sec;
/* Since microseconds cannot be set, tv_usec is ignored. */
year = 1970;
for (i = 1970; i < 2155; i++) {
mytime -= SECS_PER_YEAR;
if (mytime < 0) {
break;
}
if ((year % 4 == 0) && (year != 2100)) {
/* leap year */
mytime -= 86400;
if (mytime < 0) {
mytime += 86400;
i=2155;
break;
}
}
year++;
}
hextime.curYear = (Byte) year - 1900;
mytime += SECS_PER_YEAR; /* add the last subtraction back in */
if ((year % 4 == 0) && (year != 2100)) {
monthanddays[1] = 29;
}
hextime.month = (Byte) 0;
for (i = 0; i < 12; i++) {
mytime -= (monthanddays[i]) * 86400;
if (mytime < 0) {
mytime += monthanddays[i] * 86400;
i=12;
break;
}
hextime.month++;
}
hextime.day = (Byte) mytime / 86400;
mytime = mytime % 86400;
hextime.hour = (Byte) mytime / 3600;
mytime = mytime % 3600;
hextime.minute = (Byte) mytime / 60;
mytime = mytime % 60;
hextime.second = (Byte) mytime;
WriteTimeHex(hextime);
return 0;
}
/*
* sigprocmask - This would be much more efficient if it was implemented
* in the kernel. Note that in most cases we are doing
* two kernel traps (and thus context switches).
*/
int
sigprocmask (int how, const sigset_t *set, sigset_t *oset) {
sigset_t old;
if (set != NULL) {
switch(how) {
case SIG_BLOCK:
old = sigblock(*set);
break;
case SIG_UNBLOCK:
old = sigblock(0);
sigblock(old & ~(*set));
break;
case SIG_SETMASK:
old = sigblock(0);
sigblock(*set);
break;
default:
errno = EINVAL;
return -1;
}
} else if (oset != NULL) { /* set == NULL */
old = sigblock(0);
sigblock(old);
} /* if both set and oset are NULL, this routine is a no-op */
if (oset != NULL) {
*oset = old;
}
return 0;
}
/*
* statfs
*/
int
statfs(char *path, struct statfs *buf) {
ExpandPathRecGS ep;
int err, result;
/* get the full pathname of this file */
ep.pCount = 3;
if ((ep.inputPath = __C2GSMALLOC(path)) == NULL) {
return -1;
}
ep.outputPath = (ResultBuf255Ptr) GOinit(GSOS_NAME_MAX, NULL);
if (ep.outputPath == NULL) {
err = errno;
free(ep.inputPath);
errno = err;
return -1;
}
ep.flags = 0;
ExpandPathGS(&ep);
if (_toolErr) {
result = -1;
err = _mapErr(_toolErr);
} else {
result = _statfs(&(ep.outputPath->bufString), buf);
err = errno;
}
free(ep.inputPath);
GOfree(ep.outputPath);
errno = err;
return result;
}
/*
* truncate
*/
int
truncate(const char *path, off_t length)
{
SetPositionRecGS p;
int closerec[2];
struct {
Word pCount;
Word refNum;
GSStringPtr pathname;
Word requestAccess;
} openrec; /* abbreviated version of OpenRecGS */
int err, result;
/* open the file */
openrec.pCount = 3;
if ((openrec.pathname = __C2GSMALLOC(path)) == NULL) {
return -1;
}
openrec.requestAccess = readWriteEnable;
OpenGS(&openrec);
err = _mapErr(_toolErr);
free(openrec.pathname);
if (err) {
errno = err;
return -1;
}
/* set up the close block */
closerec[0] = 1;
closerec[1] = openrec.refNum;
p.pCount = 3;
p.base = 0;
p.refNum = openrec.refNum;
p.displacement = length;
SetEOFGS(&p);
if (_toolErr) {
errno = _mapErr(_toolErr);
result = -1;
} else {
result = 0;
}
CloseGS(closerec);
return result;
}
/*
* umask
*/
mode_t
umask (mode_t mask) {
static mode_t currentMask = 0xFFFF;
static int maskInitialized = 0;
char *p;
mode_t result;
char maskStr[5];
const char *umaskStr = "UMASK";
/* initialize off of environment first time through -- hack */
if (! maskInitialized) {
if ((p = getenv(umaskStr)) == NULL) {
currentMask = 022;
} else {
currentMask = strtoul(p, NULL, 8);
}
maskInitialized = 1;
}
result = currentMask;
currentMask = mask & 0777;
maskStr[0] = '0';
maskStr[1] = '0' + ((currentMask & 0700) >> 6);
maskStr[2] = '0' + ((currentMask & 0070) >> 3);
maskStr[3] = '0' + (currentMask & 0007);
maskStr[4] = '\0';
setenv(umaskStr, maskStr, 1); /* ignore errors */
return result;
}
/*
* unlink
*/
int
unlink(char *fname)
{
struct {
word pCount;
GSStringPtr pathname;
} drec;
int err;
drec.pCount = 1;
drec.pathname = __C2GSMALLOC(fname);
if (drec.pathname == NULL) {
return -1;
}
DestroyGS(&drec);
err = _mapErr(_toolErr);
GIfree(drec.pathname);
if (err) {
errno = err;
return -1;
}
return 0;
}
/*
* When GNO supports wait4(2) (and assuming that it doesn't have waitpid()),
* this routine can be changed to the following:
*
* return (wait4(pid, istat, options, (struct rusage *)0));
*
* This implementation is flawed since it's not done in the kernel. See
* the BUGS section of the man page for details.
*/
pid_t
waitpid(pid_t pid, union wait *istat, int options)
{
int result;
pid_t pgid;
#if 1
/*
* there's a note in <unistd.h> about the implementation of
* getpgrp() being buggy.
*/
if (pid < -1 || pid == 0) {
fprintf(stderr,"waitpid: process groups not implemented. Aborted.\n");
abort();
}
#endif
/* We really need to do this in the kernel. */
if (pid < -1) {
pgid = -pid;
} else if (pid == 0) {
pgid = _getpgrp(getpid());
} else {
pgid = -1;
}
for(;;) {
result = wait(istat);
if ((result == -1) ||
(pid == result) ||
((pgid > 1) && (pgid == _getpgrp(result)))) {
return result;
}
}
}
/*
* write
*/
ssize_t
write(int filds, void *buf, size_t bytecount) {
IORecGS iorec = {4, filds, buf, (long) bytecount, 0L};
int err;
size_t i;
char *p;
/* translate newlines if necessary */
if (_getFdTranslation(filds)) {
p = (char *) buf;
for (i = 0; i < bytecount; i++, p++) {
if (*p == '\n') {
*p = '\r';
}
}
}
/* write the file block */
WriteGS(&iorec);
if (err = _mapErr(_toolErr)) {
errno = err;
return -1;
}
return (size_t) iorec.transferCount;
}
#pragma optimize 78
#pragma debug 0
#ifdef VERSION_CHECK
/*
* _libcPanic
*
* Get a message out to the user and exit. This is at the end of the
* file because of the higher optimization level required for variadic
* functions.
*/
static void
_libcPanic (const char *fmt, ...) {
va_list list;
va_start(list, fmt);
vfprintf(stderr, fmt, list);
va_end(list);
exit(EXIT_FAILURE);
}
#endif /* VERSION_CHECK */
/*
* fcntl
*/
int
fcntl (int fd, int cmd, ...) {
struct stat sbuf;
va_list list;
int result;
unsigned short mode;
int err = 0;
va_start(list, cmd);
switch(cmd) {
case F_DUPFD:
result = va_arg(list, int);
result = dup2(fd, result);
break;
case F_GETFL:
if (fstat(fd, &sbuf) == -1) {
err = errno;
result = -1;
} else {
mode = sbuf.st_mode & (S_IRUSR | S_IWUSR);
if ((mode == 0) &&
(S_ISCHR(sbuf.st_mode) || S_ISFIFO(sbuf.st_mode))) {
/*
* There's a bug in the (beta 2.0.6) kernel where it's not setting
* the read/write bits for pipes and character special files.
* Fake it out. If/when the bug is fixed, this just becomes
* dead code.
*/
result = O_RDWR;
} else if (mode == (S_IRUSR | S_IWUSR)) {
result = O_RDWR;
} else if (mode == S_IRUSR) {
result = O_RDONLY;
} else if (mode == S_IWUSR) {
result = O_WRONLY;
} else {
result = 0;
}
}
break;
default:
err = EINVAL;
result = -1;
}
va_end(list);
if (err != 0) {
errno = err;
}
return result;
}
/*
* open -- end of file because of higher optimization required
*/
int
open (const char *path, int oflag, ...) {
OpenRecGS openRec;
CreateRecGS createRec;
SetPositionRecGS setMarkRec;
va_list list;
mode_t openmode;
int err; /* saved errno */
int result; /* returned value */
size_t currentEof; /* saved eof nec for append */
/* grab extra parameter if necessary */
va_start(list, oflag);
if (oflag & O_CREAT) {
openmode = va_arg(list, mode_t);
}
err = 0;
/* try to open the file */
openRec.pCount = 12;
openRec.pathname = __C2GSMALLOC(path);
if (openRec.pathname == NULL) {
va_end(list);
errno = ENOMEM;
return -1; /* DON'T goto label 'done' ... spurious free() */
}
if ((oflag & O_ACCMODE) == O_RDONLY) {
openRec.requestAccess = readEnable;
} else if ((oflag & O_ACCMODE) == O_WRONLY) {
openRec.requestAccess = writeEnable;
} else if ((oflag & O_ACCMODE) == O_RDWR) {
openRec.requestAccess = readWriteEnable;
} else {
openRec.requestAccess = 0;
}
openRec.resourceNumber = 0; /* data fork */
openRec.optionList = NULL; /* no FST-specific info */
OpenGS(&openRec);
if ((_toolErr == 0) && (oflag & O_CREAT) && (oflag & O_EXCL)) {
/* file already existed */
close(openRec.refNum);
err = EEXIST;
result = -1;
goto done;
} else if ((_toolErr == 0) && (oflag & O_WRONLY) &&
(openRec.storageType == 0x0d || openRec.storageType == 0x0f)) {
/* opening a volume directory or subdirectory for writing not permitted */
close(openRec.refNum);
err = EISDIR;
result = -1;
goto done;
} else if ((err = _mapErr(_toolErr)) && (err == ENOENT)) {
/* file doesn't exist -- create? */
if (oflag & O_CREAT) {
createRec.pCount = 3;
createRec.pathname = openRec.pathname;
createRec.access = _mapMode2GS(openmode);
createRec.fileType = (oflag & O_BINARY) ? BIN : TXT;
CreateGS(&createRec);
if (err = _mapErr(_toolErr)) {
result = -1;
goto done;
}
OpenGS(&openRec);
if (err = _mapErr(_toolErr)) {
result = -1;
goto done;
}
} else {
/* no create and didn't exist -- error */
result = -1;
goto done;
}
} else if (err) {
/* unknown error on open */
result = -1;
goto done;
}
/* if we got here, the file is open */
currentEof = openRec.eof;
/* truncate the file if necessary */
if ((oflag & O_TRUNC) && ((oflag & O_ACCMODE) != O_RDONLY)) {
ftruncate(openRec.refNum, 0L);
currentEof = 0L;
}
/* append to file? */
if ((oflag & O_APPEND) && ((oflag & O_ACCMODE) != O_RDONLY)) {
setMarkRec.pCount = 3;
setMarkRec.refNum = openRec.refNum;
setMarkRec.base = 0;
setMarkRec.displacement = currentEof;
SetMarkGS(&setMarkRec);
if (err = _mapErr(_toolErr)) {
result = -1;
goto done;
}
}
/* success! */
err = 0;
result = openRec.refNum;
if (oflag & O_TRANS) {
_setFdTranslation(result, 1);
}
done:
free(openRec.pathname);
va_end(list);
errno = err;
return result;
}
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