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freebsd-dev/contrib/perl5/doio.c
Mark Murray fc75d06644 Vendor import Perl 5.6.1
2002-03-16 20:14:30 +00:00

2014 lines
46 KiB
C
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/* doio.c
*
* Copyright (c) 1991-2001, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* "Far below them they saw the white waters pour into a foaming bowl, and
* then swirl darkly about a deep oval basin in the rocks, until they found
* their way out again through a narrow gate, and flowed away, fuming and
* chattering, into calmer and more level reaches."
*/
#include "EXTERN.h"
#define PERL_IN_DOIO_C
#include "perl.h"
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
#ifndef HAS_SEM
#include <sys/ipc.h>
#endif
#ifdef HAS_MSG
#include <sys/msg.h>
#endif
#ifdef HAS_SHM
#include <sys/shm.h>
# ifndef HAS_SHMAT_PROTOTYPE
extern Shmat_t shmat (int, char *, int);
# endif
#endif
#endif
#ifdef I_UTIME
# if defined(_MSC_VER) || defined(__MINGW32__)
# include <sys/utime.h>
# else
# include <utime.h>
# endif
#endif
#ifdef O_EXCL
# define OPEN_EXCL O_EXCL
#else
# define OPEN_EXCL 0
#endif
#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
#endif
bool
Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
int rawmode, int rawperm, PerlIO *supplied_fp)
{
return do_open9(gv, name, len, as_raw, rawmode, rawperm,
supplied_fp, Nullsv, 0);
}
bool
Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
I32 num_svs)
{
register IO *io = GvIOn(gv);
PerlIO *saveifp = Nullfp;
PerlIO *saveofp = Nullfp;
char savetype = IoTYPE_CLOSED;
int writing = 0;
PerlIO *fp;
int fd;
int result;
bool was_fdopen = FALSE;
bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
PL_forkprocess = 1; /* assume true if no fork */
if (PL_op && PL_op->op_type == OP_OPEN) {
/* set up disciplines */
U8 flags = PL_op->op_private;
in_raw = (flags & OPpOPEN_IN_RAW);
in_crlf = (flags & OPpOPEN_IN_CRLF);
out_raw = (flags & OPpOPEN_OUT_RAW);
out_crlf = (flags & OPpOPEN_OUT_CRLF);
}
if (IoIFP(io)) {
fd = PerlIO_fileno(IoIFP(io));
if (IoTYPE(io) == IoTYPE_STD)
result = 0;
else if (fd <= PL_maxsysfd) {
saveifp = IoIFP(io);
saveofp = IoOFP(io);
savetype = IoTYPE(io);
result = 0;
}
else if (IoTYPE(io) == IoTYPE_PIPE)
result = PerlProc_pclose(IoIFP(io));
else if (IoIFP(io) != IoOFP(io)) {
if (IoOFP(io)) {
result = PerlIO_close(IoOFP(io));
PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
}
else
result = PerlIO_close(IoIFP(io));
}
else
result = PerlIO_close(IoIFP(io));
if (result == EOF && fd > PL_maxsysfd)
PerlIO_printf(Perl_error_log,
"Warning: unable to close filehandle %s properly.\n",
GvENAME(gv));
IoOFP(io) = IoIFP(io) = Nullfp;
}
if (as_raw) {
#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
rawmode |= O_LARGEFILE;
#endif
#ifndef O_ACCMODE
#define O_ACCMODE 3 /* Assume traditional implementation */
#endif
switch (result = rawmode & O_ACCMODE) {
case O_RDONLY:
IoTYPE(io) = IoTYPE_RDONLY;
break;
case O_WRONLY:
IoTYPE(io) = IoTYPE_WRONLY;
break;
case O_RDWR:
default:
IoTYPE(io) = IoTYPE_RDWR;
break;
}
writing = (result > 0);
fd = PerlLIO_open3(name, rawmode, rawperm);
if (fd == -1)
fp = NULL;
else {
char fpmode[4];
STRLEN ix = 0;
if (result == O_RDONLY)
fpmode[ix++] = 'r';
#ifdef O_APPEND
else if (rawmode & O_APPEND) {
fpmode[ix++] = 'a';
if (result != O_WRONLY)
fpmode[ix++] = '+';
}
#endif
else {
if (result == O_WRONLY)
fpmode[ix++] = 'w';
else {
fpmode[ix++] = 'r';
fpmode[ix++] = '+';
}
}
if (rawmode & O_BINARY)
fpmode[ix++] = 'b';
fpmode[ix] = '\0';
fp = PerlIO_fdopen(fd, fpmode);
if (!fp)
PerlLIO_close(fd);
}
}
else {
char *type;
char *oname = name;
STRLEN tlen;
STRLEN olen = len;
char mode[4]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
int dodup;
type = savepvn(name, len);
tlen = len;
SAVEFREEPV(type);
if (num_svs) {
STRLEN l;
name = SvPV(svs, l) ;
len = (I32)l;
name = savepvn(name, len);
SAVEFREEPV(name);
}
else {
while (tlen && isSPACE(type[tlen-1]))
type[--tlen] = '\0';
name = type;
len = tlen;
}
mode[0] = mode[1] = mode[2] = mode[3] = '\0';
IoTYPE(io) = *type;
if (*type == IoTYPE_RDWR && tlen > 1 && type[tlen-1] != IoTYPE_PIPE) { /* scary */
mode[1] = *type++;
--tlen;
writing = 1;
}
if (*type == IoTYPE_PIPE) {
if (num_svs && (tlen != 2 || type[1] != IoTYPE_STD)) {
unknown_desr:
Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
}
/*SUPPRESS 530*/
for (type++, tlen--; isSPACE(*type); type++, tlen--) ;
if (!num_svs) {
name = type;
len = tlen;
}
if (*name == '\0') { /* command is missing 19990114 */
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
errno = EPIPE;
goto say_false;
}
if (strNE(name,"-") || num_svs)
TAINT_ENV();
TAINT_PROPER("piped open");
if (name[len-1] == '|') {
name[--len] = '\0' ;
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe");
}
{
char *mode;
if (out_raw)
mode = "wb";
else if (out_crlf)
mode = "wt";
else
mode = "w";
fp = PerlProc_popen(name,mode);
}
writing = 1;
}
else if (*type == IoTYPE_WRONLY) {
TAINT_PROPER("open");
type++;
if (*type == IoTYPE_WRONLY) {
/* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
mode[0] = IoTYPE(io) = IoTYPE_APPEND;
type++;
tlen--;
}
else
mode[0] = 'w';
writing = 1;
if (out_raw)
strcat(mode, "b");
else if (out_crlf)
strcat(mode, "t");
if (num_svs && tlen != 1)
goto unknown_desr;
if (*type == '&') {
name = type;
duplicity:
dodup = 1;
name++;
if (*name == '=') {
dodup = 0;
name++;
}
if (!*name && supplied_fp)
fp = supplied_fp;
else {
/*SUPPRESS 530*/
for (; isSPACE(*name); name++) ;
if (isDIGIT(*name))
fd = atoi(name);
else {
IO* thatio;
gv = gv_fetchpv(name,FALSE,SVt_PVIO);
thatio = GvIO(gv);
if (!thatio) {
#ifdef EINVAL
SETERRNO(EINVAL,SS$_IVCHAN);
#endif
goto say_false;
}
if (IoIFP(thatio)) {
PerlIO *fp = IoIFP(thatio);
/* Flush stdio buffer before dup. --mjd
* Unfortunately SEEK_CURing 0 seems to
* be optimized away on most platforms;
* only Solaris and Linux seem to flush
* on that. --jhi */
#ifdef USE_SFIO
/* sfio fails to clear error on next
sfwrite, contrary to documentation.
-- Nick Clark */
if (PerlIO_seek(fp, 0, SEEK_CUR) == -1)
PerlIO_clearerr(fp);
#endif
/* On the other hand, do all platforms
* take gracefully to flushing a read-only
* filehandle? Perhaps we should do
* fsetpos(src)+fgetpos(dst)? --nik */
PerlIO_flush(fp);
fd = PerlIO_fileno(fp);
/* When dup()ing STDIN, STDOUT or STDERR
* explicitly set appropriate access mode */
if (IoIFP(thatio) == PerlIO_stdout()
|| IoIFP(thatio) == PerlIO_stderr())
IoTYPE(io) = IoTYPE_WRONLY;
else if (IoIFP(thatio) == PerlIO_stdin())
IoTYPE(io) = IoTYPE_RDONLY;
/* When dup()ing a socket, say result is
* one as well */
else if (IoTYPE(thatio) == IoTYPE_SOCKET)
IoTYPE(io) = IoTYPE_SOCKET;
}
else
fd = -1;
}
if (dodup)
fd = PerlLIO_dup(fd);
else
was_fdopen = TRUE;
if (!(fp = PerlIO_fdopen(fd,mode))) {
if (dodup)
PerlLIO_close(fd);
}
}
}
else {
/*SUPPRESS 530*/
for (; isSPACE(*type); type++) ;
if (*type == IoTYPE_STD && !type[1]) {
fp = PerlIO_stdout();
IoTYPE(io) = IoTYPE_STD;
}
else {
fp = PerlIO_open((num_svs ? name : type), mode);
}
}
}
else if (*type == IoTYPE_RDONLY) {
if (num_svs && tlen != 1)
goto unknown_desr;
/*SUPPRESS 530*/
for (type++; isSPACE(*type); type++) ;
mode[0] = 'r';
if (in_raw)
strcat(mode, "b");
else if (in_crlf)
strcat(mode, "t");
if (*type == '&') {
name = type;
goto duplicity;
}
if (*type == IoTYPE_STD && !type[1]) {
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
}
else
fp = PerlIO_open((num_svs ? name : type), mode);
}
else if (tlen > 1 && type[tlen-1] == IoTYPE_PIPE) {
if (num_svs) {
if (tlen != 2 || type[0] != IoTYPE_STD)
goto unknown_desr;
}
else {
type[--tlen] = '\0';
while (tlen && isSPACE(type[tlen-1]))
type[--tlen] = '\0';
/*SUPPRESS 530*/
for (; isSPACE(*type); type++) ;
name = type;
}
if (*name == '\0') { /* command is missing 19990114 */
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
errno = EPIPE;
goto say_false;
}
if (strNE(name,"-") || num_svs)
TAINT_ENV();
TAINT_PROPER("piped open");
{
char *mode;
if (in_raw)
mode = "rb";
else if (in_crlf)
mode = "rt";
else
mode = "r";
fp = PerlProc_popen(name,mode);
}
IoTYPE(io) = IoTYPE_PIPE;
}
else {
if (num_svs)
goto unknown_desr;
name = type;
IoTYPE(io) = IoTYPE_RDONLY;
/*SUPPRESS 530*/
for (; isSPACE(*name); name++) ;
if (strEQ(name,"-")) {
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
}
else {
char *mode;
if (in_raw)
mode = "rb";
else if (in_crlf)
mode = "rt";
else
mode = "r";
fp = PerlIO_open(name,mode);
}
}
}
if (!fp) {
if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
goto say_false;
}
if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD) {
if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
(void)PerlIO_close(fp);
goto say_false;
}
if (S_ISSOCK(PL_statbuf.st_mode))
IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
#ifdef HAS_SOCKET
else if (
#ifdef S_IFMT
!(PL_statbuf.st_mode & S_IFMT)
#else
!PL_statbuf.st_mode
#endif
&& IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
&& IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
) { /* on OS's that return 0 on fstat()ed pipe */
char tmpbuf[256];
Sock_size_t buflen = sizeof tmpbuf;
if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
&buflen) >= 0
|| errno != ENOTSOCK)
IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
/* but some return 0 for streams too, sigh */
}
#endif
}
if (saveifp) { /* must use old fp? */
fd = PerlIO_fileno(saveifp);
if (saveofp) {
PerlIO_flush(saveofp); /* emulate PerlIO_close() */
if (saveofp != saveifp) { /* was a socket? */
PerlIO_close(saveofp);
if (fd > 2)
Safefree(saveofp);
}
}
if (fd != PerlIO_fileno(fp)) {
Pid_t pid;
SV *sv;
PerlLIO_dup2(PerlIO_fileno(fp), fd);
#ifdef VMS
if (fd != PerlIO_fileno(PerlIO_stdin())) {
char newname[FILENAME_MAX+1];
if (fgetname(fp, newname)) {
if (fd == PerlIO_fileno(PerlIO_stdout())) Perl_vmssetuserlnm("SYS$OUTPUT", newname);
if (fd == PerlIO_fileno(PerlIO_stderr())) Perl_vmssetuserlnm("SYS$ERROR", newname);
}
}
#endif
LOCK_FDPID_MUTEX;
sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
(void)SvUPGRADE(sv, SVt_IV);
pid = SvIVX(sv);
SvIVX(sv) = 0;
sv = *av_fetch(PL_fdpid,fd,TRUE);
UNLOCK_FDPID_MUTEX;
(void)SvUPGRADE(sv, SVt_IV);
SvIVX(sv) = pid;
if (!was_fdopen)
PerlIO_close(fp);
}
fp = saveifp;
PerlIO_clearerr(fp);
}
#if defined(HAS_FCNTL) && defined(F_SETFD)
{
int save_errno = errno;
fd = PerlIO_fileno(fp);
fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
errno = save_errno;
}
#endif
IoIFP(io) = fp;
IoFLAGS(io) &= ~IOf_NOLINE;
if (writing) {
if (IoTYPE(io) == IoTYPE_SOCKET
|| (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) )
{
char *mode;
if (out_raw)
mode = "wb";
else if (out_crlf)
mode = "wt";
else
mode = "w";
if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),mode))) {
PerlIO_close(fp);
IoIFP(io) = Nullfp;
goto say_false;
}
}
else
IoOFP(io) = fp;
}
return TRUE;
say_false:
IoIFP(io) = saveifp;
IoOFP(io) = saveofp;
IoTYPE(io) = savetype;
return FALSE;
}
PerlIO *
Perl_nextargv(pTHX_ register GV *gv)
{
register SV *sv;
#ifndef FLEXFILENAMES
int filedev;
int fileino;
#endif
Uid_t fileuid;
Gid_t filegid;
IO *io = GvIOp(gv);
if (!PL_argvoutgv)
PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
IoFLAGS(io) &= ~IOf_START;
if (PL_inplace) {
if (!PL_argvout_stack)
PL_argvout_stack = newAV();
av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
}
}
if (PL_filemode & (S_ISUID|S_ISGID)) {
PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
#ifdef HAS_FCHMOD
(void)fchmod(PL_lastfd,PL_filemode);
#else
(void)PerlLIO_chmod(PL_oldname,PL_filemode);
#endif
}
PL_filemode = 0;
while (av_len(GvAV(gv)) >= 0) {
STRLEN oldlen;
sv = av_shift(GvAV(gv));
SAVEFREESV(sv);
sv_setsv(GvSV(gv),sv);
SvSETMAGIC(GvSV(gv));
PL_oldname = SvPVx(GvSV(gv), oldlen);
if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
if (PL_inplace) {
TAINT_PROPER("inplace open");
if (oldlen == 1 && *PL_oldname == '-') {
setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
return IoIFP(GvIOp(gv));
}
#ifndef FLEXFILENAMES
filedev = PL_statbuf.st_dev;
fileino = PL_statbuf.st_ino;
#endif
PL_filemode = PL_statbuf.st_mode;
fileuid = PL_statbuf.st_uid;
filegid = PL_statbuf.st_gid;
if (!S_ISREG(PL_filemode)) {
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ WARN_INPLACE,
"Can't do inplace edit: %s is not a regular file",
PL_oldname );
do_close(gv,FALSE);
continue;
}
if (*PL_inplace) {
char *star = strchr(PL_inplace, '*');
if (star) {
char *begin = PL_inplace;
sv_setpvn(sv, "", 0);
do {
sv_catpvn(sv, begin, star - begin);
sv_catpvn(sv, PL_oldname, oldlen);
begin = ++star;
} while ((star = strchr(begin, '*')));
if (*begin)
sv_catpv(sv,begin);
}
else {
sv_catpv(sv,PL_inplace);
}
#ifndef FLEXFILENAMES
if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
&& PL_statbuf.st_dev == filedev
&& PL_statbuf.st_ino == fileino
#ifdef DJGPP
|| (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
#endif
)
{
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ WARN_INPLACE,
"Can't do inplace edit: %s would not be unique",
SvPVX(sv));
do_close(gv,FALSE);
continue;
}
#endif
#ifdef HAS_RENAME
#if !defined(DOSISH) && !defined(__CYGWIN__)
if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ WARN_INPLACE,
"Can't rename %s to %s: %s, skipping file",
PL_oldname, SvPVX(sv), Strerror(errno) );
do_close(gv,FALSE);
continue;
}
#else
do_close(gv,FALSE);
(void)PerlLIO_unlink(SvPVX(sv));
(void)PerlLIO_rename(PL_oldname,SvPVX(sv));
do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
#endif /* DOSISH */
#else
(void)UNLINK(SvPVX(sv));
if (link(PL_oldname,SvPVX(sv)) < 0) {
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ WARN_INPLACE,
"Can't rename %s to %s: %s, skipping file",
PL_oldname, SvPVX(sv), Strerror(errno) );
do_close(gv,FALSE);
continue;
}
(void)UNLINK(PL_oldname);
#endif
}
else {
#if !defined(DOSISH) && !defined(AMIGAOS)
# ifndef VMS /* Don't delete; use automatic file versioning */
if (UNLINK(PL_oldname) < 0) {
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ WARN_INPLACE,
"Can't remove %s: %s, skipping file",
PL_oldname, Strerror(errno) );
do_close(gv,FALSE);
continue;
}
# endif
#else
Perl_croak(aTHX_ "Can't do inplace edit without backup");
#endif
}
sv_setpvn(sv,">",!PL_inplace);
sv_catpvn(sv,PL_oldname,oldlen);
SETERRNO(0,0); /* in case sprintf set errno */
#ifdef VMS
if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
#else
if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
#endif
{
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
PL_oldname, Strerror(errno) );
do_close(gv,FALSE);
continue;
}
setdefout(PL_argvoutgv);
PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
(void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
#ifdef HAS_FCHMOD
(void)fchmod(PL_lastfd,PL_filemode);
#else
# if !(defined(WIN32) && defined(__BORLANDC__))
/* Borland runtime creates a readonly file! */
(void)PerlLIO_chmod(PL_oldname,PL_filemode);
# endif
#endif
if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
#ifdef HAS_FCHOWN
(void)fchown(PL_lastfd,fileuid,filegid);
#else
#ifdef HAS_CHOWN
(void)PerlLIO_chown(PL_oldname,fileuid,filegid);
#endif
#endif
}
}
return IoIFP(GvIOp(gv));
}
else {
if (ckWARN_d(WARN_INPLACE)) {
int eno = errno;
if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
&& !S_ISREG(PL_statbuf.st_mode))
{
Perl_warner(aTHX_ WARN_INPLACE,
"Can't do inplace edit: %s is not a regular file",
PL_oldname);
}
else
Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
PL_oldname, Strerror(eno));
}
}
}
if (io && (IoFLAGS(io) & IOf_ARGV))
IoFLAGS(io) |= IOf_START;
if (PL_inplace) {
(void)do_close(PL_argvoutgv,FALSE);
if (io && (IoFLAGS(io) & IOf_ARGV)
&& PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
{
GV *oldout = (GV*)av_pop(PL_argvout_stack);
setdefout(oldout);
SvREFCNT_dec(oldout);
return Nullfp;
}
setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
}
return Nullfp;
}
#ifdef HAS_PIPE
void
Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
{
register IO *rstio;
register IO *wstio;
int fd[2];
if (!rgv)
goto badexit;
if (!wgv)
goto badexit;
rstio = GvIOn(rgv);
wstio = GvIOn(wgv);
if (IoIFP(rstio))
do_close(rgv,FALSE);
if (IoIFP(wstio))
do_close(wgv,FALSE);
if (PerlProc_pipe(fd) < 0)
goto badexit;
IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
IoIFP(wstio) = IoOFP(wstio);
IoTYPE(rstio) = IoTYPE_RDONLY;
IoTYPE(wstio) = IoTYPE_WRONLY;
if (!IoIFP(rstio) || !IoOFP(wstio)) {
if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
else PerlLIO_close(fd[0]);
if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
else PerlLIO_close(fd[1]);
goto badexit;
}
sv_setsv(sv,&PL_sv_yes);
return;
badexit:
sv_setsv(sv,&PL_sv_undef);
return;
}
#endif
/* explicit renamed to avoid C++ conflict -- kja */
bool
Perl_do_close(pTHX_ GV *gv, bool not_implicit)
{
bool retval;
IO *io;
if (!gv)
gv = PL_argvgv;
if (!gv || SvTYPE(gv) != SVt_PVGV) {
if (not_implicit)
SETERRNO(EBADF,SS$_IVCHAN);
return FALSE;
}
io = GvIO(gv);
if (!io) { /* never opened */
if (not_implicit) {
if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
report_evil_fh(gv, io, PL_op->op_type);
SETERRNO(EBADF,SS$_IVCHAN);
}
return FALSE;
}
retval = io_close(io, not_implicit);
if (not_implicit) {
IoLINES(io) = 0;
IoPAGE(io) = 0;
IoLINES_LEFT(io) = IoPAGE_LEN(io);
}
IoTYPE(io) = IoTYPE_CLOSED;
return retval;
}
bool
Perl_io_close(pTHX_ IO *io, bool not_implicit)
{
bool retval = FALSE;
int status;
if (IoIFP(io)) {
if (IoTYPE(io) == IoTYPE_PIPE) {
status = PerlProc_pclose(IoIFP(io));
if (not_implicit) {
STATUS_NATIVE_SET(status);
retval = (STATUS_POSIX == 0);
}
else {
retval = (status != -1);
}
}
else if (IoTYPE(io) == IoTYPE_STD)
retval = TRUE;
else {
if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
retval = (PerlIO_close(IoOFP(io)) != EOF);
PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
}
else
retval = (PerlIO_close(IoIFP(io)) != EOF);
}
IoOFP(io) = IoIFP(io) = Nullfp;
}
else if (not_implicit) {
SETERRNO(EBADF,SS$_IVCHAN);
}
return retval;
}
bool
Perl_do_eof(pTHX_ GV *gv)
{
register IO *io;
int ch;
io = GvIO(gv);
if (!io)
return TRUE;
else if (ckWARN(WARN_IO)
&& (IoTYPE(io) == IoTYPE_WRONLY || IoIFP(io) == PerlIO_stdout()
|| IoIFP(io) == PerlIO_stderr()))
{
/* integrate to report_evil_fh()? */
char *name = NULL;
if (isGV(gv)) {
SV* sv = sv_newmortal();
gv_efullname4(sv, gv, Nullch, FALSE);
name = SvPV_nolen(sv);
}
if (name && *name)
Perl_warner(aTHX_ WARN_IO,
"Filehandle %s opened only for output", name);
else
Perl_warner(aTHX_ WARN_IO,
"Filehandle opened only for output");
}
while (IoIFP(io)) {
if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
return FALSE; /* this is the most usual case */
}
ch = PerlIO_getc(IoIFP(io));
if (ch != EOF) {
(void)PerlIO_ungetc(IoIFP(io),ch);
return FALSE;
}
if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
if (PerlIO_get_cnt(IoIFP(io)) < -1)
PerlIO_set_cnt(IoIFP(io),-1);
}
if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
if (!nextargv(PL_argvgv)) /* get another fp handy */
return TRUE;
}
else
return TRUE; /* normal fp, definitely end of file */
}
return TRUE;
}
Off_t
Perl_do_tell(pTHX_ GV *gv)
{
register IO *io;
register PerlIO *fp;
if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
#ifdef ULTRIX_STDIO_BOTCH
if (PerlIO_eof(fp))
(void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
#endif
return PerlIO_tell(fp);
}
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
SETERRNO(EBADF,RMS$_IFI);
return (Off_t)-1;
}
bool
Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
{
register IO *io;
register PerlIO *fp;
if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
#ifdef ULTRIX_STDIO_BOTCH
if (PerlIO_eof(fp))
(void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
#endif
return PerlIO_seek(fp, pos, whence) >= 0;
}
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
SETERRNO(EBADF,RMS$_IFI);
return FALSE;
}
Off_t
Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
{
register IO *io;
register PerlIO *fp;
if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
SETERRNO(EBADF,RMS$_IFI);
return (Off_t)-1;
}
int
Perl_mode_from_discipline(pTHX_ SV *discp)
{
int mode = O_BINARY;
if (discp) {
STRLEN len;
char *s = SvPV(discp,len);
while (*s) {
if (*s == ':') {
switch (s[1]) {
case 'r':
if (len > 3 && strnEQ(s+1, "raw", 3)
&& (!s[4] || s[4] == ':' || isSPACE(s[4])))
{
mode = O_BINARY;
s += 4;
len -= 4;
break;
}
/* FALL THROUGH */
case 'c':
if (len > 4 && strnEQ(s+1, "crlf", 4)
&& (!s[5] || s[5] == ':' || isSPACE(s[5])))
{
mode = O_TEXT;
s += 5;
len -= 5;
break;
}
/* FALL THROUGH */
default:
goto fail_discipline;
}
}
else if (isSPACE(*s)) {
++s;
--len;
}
else {
char *end;
fail_discipline:
end = strchr(s+1, ':');
if (!end)
end = s+len;
Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
}
}
}
return mode;
}
int
Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
{
#ifdef DOSISH
# if defined(atarist) || defined(__MINT__)
if (!PerlIO_flush(fp)) {
if (mode & O_BINARY)
((FILE*)fp)->_flag |= _IOBIN;
else
((FILE*)fp)->_flag &= ~ _IOBIN;
return 1;
}
return 0;
# else
if (PerlLIO_setmode(PerlIO_fileno(fp), mode) != -1) {
# if defined(WIN32) && defined(__BORLANDC__)
/* The translation mode of the stream is maintained independent
* of the translation mode of the fd in the Borland RTL (heavy
* digging through their runtime sources reveal). User has to
* set the mode explicitly for the stream (though they don't
* document this anywhere). GSAR 97-5-24
*/
PerlIO_seek(fp,0L,0);
if (mode & O_BINARY)
((FILE*)fp)->flags |= _F_BIN;
else
((FILE*)fp)->flags &= ~ _F_BIN;
# endif
return 1;
}
else
return 0;
# endif
#else
# if defined(USEMYBINMODE)
if (my_binmode(fp, iotype, mode) != FALSE)
return 1;
else
return 0;
# else
return 1;
# endif
#endif
}
#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
/* code courtesy of William Kucharski */
#define HAS_CHSIZE
I32 my_chsize(fd, length)
I32 fd; /* file descriptor */
Off_t length; /* length to set file to */
{
struct flock fl;
struct stat filebuf;
if (PerlLIO_fstat(fd, &filebuf) < 0)
return -1;
if (filebuf.st_size < length) {
/* extend file length */
if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
return -1;
/* write a "0" byte */
if ((PerlLIO_write(fd, "", 1)) != 1)
return -1;
}
else {
/* truncate length */
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = length;
fl.l_type = F_WRLCK; /* write lock on file space */
/*
* This relies on the UNDOCUMENTED F_FREESP argument to
* fcntl(2), which truncates the file so that it ends at the
* position indicated by fl.l_start.
*
* Will minor miracles never cease?
*/
if (fcntl(fd, F_FREESP, &fl) < 0)
return -1;
}
return 0;
}
#endif /* F_FREESP */
bool
Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
{
register char *tmps;
STRLEN len;
/* assuming fp is checked earlier */
if (!sv)
return TRUE;
if (PL_ofmt) {
if (SvGMAGICAL(sv))
mg_get(sv);
if (SvIOK(sv) && SvIVX(sv) != 0) {
PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
return !PerlIO_error(fp);
}
if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
|| (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
return !PerlIO_error(fp);
}
}
switch (SvTYPE(sv)) {
case SVt_NULL:
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
return TRUE;
case SVt_IV:
if (SvIOK(sv)) {
if (SvGMAGICAL(sv))
mg_get(sv);
if (SvIsUV(sv))
PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
else
PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
return !PerlIO_error(fp);
}
/* FALL THROUGH */
default:
tmps = SvPV(sv, len);
break;
}
/* To detect whether the process is about to overstep its
* filesize limit we would need getrlimit(). We could then
* also transparently raise the limit with setrlimit() --
* but only until the system hard limit/the filesystem limit,
* at which we would get EPERM. Note that when using buffered
* io the write failure can be delayed until the flush/close. --jhi */
if (len && (PerlIO_write(fp,tmps,len) == 0))
return FALSE;
return !PerlIO_error(fp);
}
I32
Perl_my_stat(pTHX)
{
dSP;
IO *io;
GV* gv;
if (PL_op->op_flags & OPf_REF) {
EXTEND(SP,1);
gv = cGVOP_gv;
do_fstat:
io = GvIO(gv);
if (io && IoIFP(io)) {
PL_statgv = gv;
sv_setpv(PL_statname,"");
PL_laststype = OP_STAT;
return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
}
else {
if (gv == PL_defgv)
return PL_laststatval;
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
PL_statgv = Nullgv;
sv_setpv(PL_statname,"");
return (PL_laststatval = -1);
}
}
else {
SV* sv = POPs;
char *s;
STRLEN n_a;
PUTBACK;
if (SvTYPE(sv) == SVt_PVGV) {
gv = (GV*)sv;
goto do_fstat;
}
else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
gv = (GV*)SvRV(sv);
goto do_fstat;
}
s = SvPV(sv, n_a);
PL_statgv = Nullgv;
sv_setpv(PL_statname, s);
PL_laststype = OP_STAT;
PL_laststatval = PerlLIO_stat(s, &PL_statcache);
if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
return PL_laststatval;
}
}
I32
Perl_my_lstat(pTHX)
{
dSP;
SV *sv;
STRLEN n_a;
if (PL_op->op_flags & OPf_REF) {
EXTEND(SP,1);
if (cGVOP_gv == PL_defgv) {
if (PL_laststype != OP_LSTAT)
Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
return PL_laststatval;
}
Perl_croak(aTHX_ "You can't use -l on a filehandle");
}
PL_laststype = OP_LSTAT;
PL_statgv = Nullgv;
sv = POPs;
PUTBACK;
sv_setpv(PL_statname,SvPV(sv, n_a));
PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
return PL_laststatval;
}
bool
Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
{
return do_aexec5(really, mark, sp, 0, 0);
}
bool
Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
int fd, int do_report)
{
#ifdef MACOS_TRADITIONAL
Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
#else
register char **a;
char *tmps;
STRLEN n_a;
if (sp > mark) {
New(401,PL_Argv, sp - mark + 1, char*);
a = PL_Argv;
while (++mark <= sp) {
if (*mark)
*a++ = SvPVx(*mark, n_a);
else
*a++ = "";
}
*a = Nullch;
if (really)
tmps = SvPV(really, n_a);
if ((!really && *PL_Argv[0] != '/') ||
(really && *tmps != '/')) /* will execvp use PATH? */
TAINT_ENV(); /* testing IFS here is overkill, probably */
if (really && *tmps)
PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
else
PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
if (ckWARN(WARN_EXEC))
Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
(really ? tmps : PL_Argv[0]), Strerror(errno));
if (do_report) {
int e = errno;
PerlLIO_write(fd, (void*)&e, sizeof(int));
PerlLIO_close(fd);
}
}
do_execfree();
#endif
return FALSE;
}
void
Perl_do_execfree(pTHX)
{
if (PL_Argv) {
Safefree(PL_Argv);
PL_Argv = Null(char **);
}
if (PL_Cmd) {
Safefree(PL_Cmd);
PL_Cmd = Nullch;
}
}
#if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
bool
Perl_do_exec(pTHX_ char *cmd)
{
return do_exec3(cmd,0,0);
}
bool
Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
{
register char **a;
register char *s;
char flags[10];
while (*cmd && isSPACE(*cmd))
cmd++;
/* save an extra exec if possible */
#ifdef CSH
if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
strcpy(flags,"-c");
s = cmd+PL_cshlen+3;
if (*s == 'f') {
s++;
strcat(flags,"f");
}
if (*s == ' ')
s++;
if (*s++ == '\'') {
char *ncmd = s;
while (*s)
s++;
if (s[-1] == '\n')
*--s = '\0';
if (s[-1] == '\'') {
*--s = '\0';
PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
*s = '\'';
return FALSE;
}
}
}
#endif /* CSH */
/* see if there are shell metacharacters in it */
if (*cmd == '.' && isSPACE(cmd[1]))
goto doshell;
if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
goto doshell;
for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
if (*s == '=')
goto doshell;
for (s = cmd; *s; s++) {
if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
if (*s == '\n' && !s[1]) {
*s = '\0';
break;
}
/* handle the 2>&1 construct at the end */
if (*s == '>' && s[1] == '&' && s[2] == '1'
&& s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
&& (!s[3] || isSPACE(s[3])))
{
char *t = s + 3;
while (*t && isSPACE(*t))
++t;
if (!*t && (dup2(1,2) != -1)) {
s[-2] = '\0';
break;
}
}
doshell:
PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
return FALSE;
}
}
New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
PL_Cmd = savepvn(cmd, s-cmd);
a = PL_Argv;
for (s = PL_Cmd; *s;) {
while (*s && isSPACE(*s)) s++;
if (*s)
*(a++) = s;
while (*s && !isSPACE(*s)) s++;
if (*s)
*s++ = '\0';
}
*a = Nullch;
if (PL_Argv[0]) {
PerlProc_execvp(PL_Argv[0],PL_Argv);
if (errno == ENOEXEC) { /* for system V NIH syndrome */
do_execfree();
goto doshell;
}
{
int e = errno;
if (ckWARN(WARN_EXEC))
Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
PL_Argv[0], Strerror(errno));
if (do_report) {
PerlLIO_write(fd, (void*)&e, sizeof(int));
PerlLIO_close(fd);
}
}
}
do_execfree();
return FALSE;
}
#endif /* OS2 || WIN32 */
I32
Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
{
register I32 val;
register I32 val2;
register I32 tot = 0;
char *what;
char *s;
SV **oldmark = mark;
STRLEN n_a;
#define APPLY_TAINT_PROPER() \
STMT_START { \
if (PL_tainted) { TAINT_PROPER(what); } \
} STMT_END
/* This is a first heuristic; it doesn't catch tainting magic. */
if (PL_tainting) {
while (++mark <= sp) {
if (SvTAINTED(*mark)) {
TAINT;
break;
}
}
mark = oldmark;
}
switch (type) {
case OP_CHMOD:
what = "chmod";
APPLY_TAINT_PROPER();
if (++mark <= sp) {
val = SvIVx(*mark);
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
char *name = SvPVx(*mark, n_a);
APPLY_TAINT_PROPER();
if (PerlLIO_chmod(name, val))
tot--;
}
}
break;
#ifdef HAS_CHOWN
case OP_CHOWN:
what = "chown";
APPLY_TAINT_PROPER();
if (sp - mark > 2) {
val = SvIVx(*++mark);
val2 = SvIVx(*++mark);
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
char *name = SvPVx(*mark, n_a);
APPLY_TAINT_PROPER();
if (PerlLIO_chown(name, val, val2))
tot--;
}
}
break;
#endif
/*
XXX Should we make lchown() directly available from perl?
For now, we'll let Configure test for HAS_LCHOWN, but do
nothing in the core.
--AD 5/1998
*/
#ifdef HAS_KILL
case OP_KILL:
what = "kill";
APPLY_TAINT_PROPER();
if (mark == sp)
break;
s = SvPVx(*++mark, n_a);
if (isUPPER(*s)) {
if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
s += 3;
if (!(val = whichsig(s)))
Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
}
else
val = SvIVx(*mark);
APPLY_TAINT_PROPER();
tot = sp - mark;
#ifdef VMS
/* kill() doesn't do process groups (job trees?) under VMS */
if (val < 0) val = -val;
if (val == SIGKILL) {
# include <starlet.h>
/* Use native sys$delprc() to insure that target process is
* deleted; supervisor-mode images don't pay attention to
* CRTL's emulation of Unix-style signals and kill()
*/
while (++mark <= sp) {
I32 proc = SvIVx(*mark);
register unsigned long int __vmssts;
APPLY_TAINT_PROPER();
if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
tot--;
switch (__vmssts) {
case SS$_NONEXPR:
case SS$_NOSUCHNODE:
SETERRNO(ESRCH,__vmssts);
break;
case SS$_NOPRIV:
SETERRNO(EPERM,__vmssts);
break;
default:
SETERRNO(EVMSERR,__vmssts);
}
}
}
break;
}
#endif
if (val < 0) {
val = -val;
while (++mark <= sp) {
I32 proc = SvIVx(*mark);
APPLY_TAINT_PROPER();
#ifdef HAS_KILLPG
if (PerlProc_killpg(proc,val)) /* BSD */
#else
if (PerlProc_kill(-proc,val)) /* SYSV */
#endif
tot--;
}
}
else {
while (++mark <= sp) {
I32 proc = SvIVx(*mark);
APPLY_TAINT_PROPER();
if (PerlProc_kill(proc, val))
tot--;
}
}
break;
#endif
case OP_UNLINK:
what = "unlink";
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
s = SvPVx(*mark, n_a);
APPLY_TAINT_PROPER();
if (PL_euid || PL_unsafe) {
if (UNLINK(s))
tot--;
}
else { /* don't let root wipe out directories without -U */
if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
tot--;
else {
if (UNLINK(s))
tot--;
}
}
}
break;
#ifdef HAS_UTIME
case OP_UTIME:
what = "utime";
APPLY_TAINT_PROPER();
if (sp - mark > 2) {
#if defined(I_UTIME) || defined(VMS)
struct utimbuf utbuf;
#else
struct {
Time_t actime;
Time_t modtime;
} utbuf;
#endif
Zero(&utbuf, sizeof utbuf, char);
#ifdef BIG_TIME
utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
#else
utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
#endif
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
char *name = SvPVx(*mark, n_a);
APPLY_TAINT_PROPER();
if (PerlLIO_utime(name, &utbuf))
tot--;
}
}
else
tot = 0;
break;
#endif
}
return tot;
#undef APPLY_TAINT_PROPER
}
/* Do the permissions allow some operation? Assumes statcache already set. */
#ifndef VMS /* VMS' cando is in vms.c */
bool
Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
/* Note: we use `effective' both for uids and gids.
* Here we are betting on Uid_t being equal or wider than Gid_t. */
{
#ifdef DOSISH
/* [Comments and code from Len Reed]
* MS-DOS "user" is similar to UNIX's "superuser," but can't write
* to write-protected files. The execute permission bit is set
* by the Miscrosoft C library stat() function for the following:
* .exe files
* .com files
* .bat files
* directories
* All files and directories are readable.
* Directories and special files, e.g. "CON", cannot be
* write-protected.
* [Comment by Tom Dinger -- a directory can have the write-protect
* bit set in the file system, but DOS permits changes to
* the directory anyway. In addition, all bets are off
* here for networked software, such as Novell and
* Sun's PC-NFS.]
*/
/* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
* too so it will actually look into the files for magic numbers
*/
return (mode & statbufp->st_mode) ? TRUE : FALSE;
#else /* ! DOSISH */
if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
if (mode == S_IXUSR) {
if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
return TRUE;
}
else
return TRUE; /* root reads and writes anything */
return FALSE;
}
if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
if (statbufp->st_mode & mode)
return TRUE; /* ok as "user" */
}
else if (ingroup(statbufp->st_gid,effective)) {
if (statbufp->st_mode & mode >> 3)
return TRUE; /* ok as "group" */
}
else if (statbufp->st_mode & mode >> 6)
return TRUE; /* ok as "other" */
return FALSE;
#endif /* ! DOSISH */
}
#endif /* ! VMS */
bool
Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
{
#ifdef MACOS_TRADITIONAL
/* This is simply not correct for AppleShare, but fix it yerself. */
return TRUE;
#else
if (testgid == (effective ? PL_egid : PL_gid))
return TRUE;
#ifdef HAS_GETGROUPS
#ifndef NGROUPS
#define NGROUPS 32
#endif
{
Groups_t gary[NGROUPS];
I32 anum;
anum = getgroups(NGROUPS,gary);
while (--anum >= 0)
if (gary[anum] == testgid)
return TRUE;
}
#endif
return FALSE;
#endif
}
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
I32
Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
{
key_t key;
I32 n, flags;
key = (key_t)SvNVx(*++mark);
n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
flags = SvIVx(*++mark);
SETERRNO(0,0);
switch (optype)
{
#ifdef HAS_MSG
case OP_MSGGET:
return msgget(key, flags);
#endif
#ifdef HAS_SEM
case OP_SEMGET:
return semget(key, n, flags);
#endif
#ifdef HAS_SHM
case OP_SHMGET:
return shmget(key, n, flags);
#endif
#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
default:
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
}
return -1; /* should never happen */
}
I32
Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
{
SV *astr;
char *a;
I32 id, n, cmd, infosize, getinfo;
I32 ret = -1;
id = SvIVx(*++mark);
n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
cmd = SvIVx(*++mark);
astr = *++mark;
infosize = 0;
getinfo = (cmd == IPC_STAT);
switch (optype)
{
#ifdef HAS_MSG
case OP_MSGCTL:
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct msqid_ds);
break;
#endif
#ifdef HAS_SHM
case OP_SHMCTL:
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct shmid_ds);
break;
#endif
#ifdef HAS_SEM
case OP_SEMCTL:
#ifdef Semctl
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct semid_ds);
else if (cmd == GETALL || cmd == SETALL)
{
struct semid_ds semds;
union semun semun;
#ifdef EXTRA_F_IN_SEMUN_BUF
semun.buff = &semds;
#else
semun.buf = &semds;
#endif
getinfo = (cmd == GETALL);
if (Semctl(id, 0, IPC_STAT, semun) == -1)
return -1;
infosize = semds.sem_nsems * sizeof(short);
/* "short" is technically wrong but much more portable
than guessing about u_?short(_t)? */
}
#else
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
break;
#endif
#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
default:
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
}
if (infosize)
{
STRLEN len;
if (getinfo)
{
SvPV_force(astr, len);
a = SvGROW(astr, infosize+1);
}
else
{
a = SvPV(astr, len);
if (len != infosize)
Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
PL_op_desc[optype],
(unsigned long)len,
(long)infosize);
}
}
else
{
IV i = SvIV(astr);
a = INT2PTR(char *,i); /* ouch */
}
SETERRNO(0,0);
switch (optype)
{
#ifdef HAS_MSG
case OP_MSGCTL:
ret = msgctl(id, cmd, (struct msqid_ds *)a);
break;
#endif
#ifdef HAS_SEM
case OP_SEMCTL: {
#ifdef Semctl
union semun unsemds;
#ifdef EXTRA_F_IN_SEMUN_BUF
unsemds.buff = (struct semid_ds *)a;
#else
unsemds.buf = (struct semid_ds *)a;
#endif
ret = Semctl(id, n, cmd, unsemds);
#else
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
}
break;
#endif
#ifdef HAS_SHM
case OP_SHMCTL:
ret = shmctl(id, cmd, (struct shmid_ds *)a);
break;
#endif
}
if (getinfo && ret >= 0) {
SvCUR_set(astr, infosize);
*SvEND(astr) = '\0';
SvSETMAGIC(astr);
}
return ret;
}
I32
Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
{
#ifdef HAS_MSG
SV *mstr;
char *mbuf;
I32 id, msize, flags;
STRLEN len;
id = SvIVx(*++mark);
mstr = *++mark;
flags = SvIVx(*++mark);
mbuf = SvPV(mstr, len);
if ((msize = len - sizeof(long)) < 0)
Perl_croak(aTHX_ "Arg too short for msgsnd");
SETERRNO(0,0);
return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
#else
Perl_croak(aTHX_ "msgsnd not implemented");
#endif
}
I32
Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
{
#ifdef HAS_MSG
SV *mstr;
char *mbuf;
long mtype;
I32 id, msize, flags, ret;
STRLEN len;
id = SvIVx(*++mark);
mstr = *++mark;
/* suppress warning when reading into undef var --jhi */
if (! SvOK(mstr))
sv_setpvn(mstr, "", 0);
msize = SvIVx(*++mark);
mtype = (long)SvIVx(*++mark);
flags = SvIVx(*++mark);
SvPV_force(mstr, len);
mbuf = SvGROW(mstr, sizeof(long)+msize+1);
SETERRNO(0,0);
ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
if (ret >= 0) {
SvCUR_set(mstr, sizeof(long)+ret);
*SvEND(mstr) = '\0';
#ifndef INCOMPLETE_TAINTS
/* who knows who has been playing with this message? */
SvTAINTED_on(mstr);
#endif
}
return ret;
#else
Perl_croak(aTHX_ "msgrcv not implemented");
#endif
}
I32
Perl_do_semop(pTHX_ SV **mark, SV **sp)
{
#ifdef HAS_SEM
SV *opstr;
char *opbuf;
I32 id;
STRLEN opsize;
id = SvIVx(*++mark);
opstr = *++mark;
opbuf = SvPV(opstr, opsize);
if (opsize < sizeof(struct sembuf)
|| (opsize % sizeof(struct sembuf)) != 0) {
SETERRNO(EINVAL,LIB$_INVARG);
return -1;
}
SETERRNO(0,0);
return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
#else
Perl_croak(aTHX_ "semop not implemented");
#endif
}
I32
Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
{
#ifdef HAS_SHM
SV *mstr;
char *mbuf, *shm;
I32 id, mpos, msize;
STRLEN len;
struct shmid_ds shmds;
id = SvIVx(*++mark);
mstr = *++mark;
mpos = SvIVx(*++mark);
msize = SvIVx(*++mark);
SETERRNO(0,0);
if (shmctl(id, IPC_STAT, &shmds) == -1)
return -1;
if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
return -1;
}
shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
if (shm == (char *)-1) /* I hate System V IPC, I really do */
return -1;
if (optype == OP_SHMREAD) {
/* suppress warning when reading into undef var (tchrist 3/Mar/00) */
if (! SvOK(mstr))
sv_setpvn(mstr, "", 0);
SvPV_force(mstr, len);
mbuf = SvGROW(mstr, msize+1);
Copy(shm + mpos, mbuf, msize, char);
SvCUR_set(mstr, msize);
*SvEND(mstr) = '\0';
SvSETMAGIC(mstr);
#ifndef INCOMPLETE_TAINTS
/* who knows who has been playing with this shared memory? */
SvTAINTED_on(mstr);
#endif
}
else {
I32 n;
mbuf = SvPV(mstr, len);
if ((n = len) > msize)
n = msize;
Copy(mbuf, shm + mpos, n, char);
if (n < msize)
memzero(shm + mpos + n, msize - n);
}
return shmdt(shm);
#else
Perl_croak(aTHX_ "shm I/O not implemented");
#endif
}
#endif /* SYSV IPC */
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