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doio.c
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/* doio.c
*
* Copyright (c) 1991-2000, 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
/* XXX If this causes problems, set i_unistd=undef in the hint file. */
#ifdef I_UNISTD
# include <unistd.h>
#endif
#if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
# include <sys/socket.h>
# if defined(USE_SOCKS) && defined(I_SOCKS)
# include <socks.h>
# endif
# ifdef I_NETBSD
# include <netdb.h>
# endif
# ifndef ENOTSOCK
# ifdef I_NET_ERRNO
# include <net/errno.h>
# endif
# endif
#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 = ' ';
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 == '+' && tlen > 1 && type[tlen-1] != '|') { /* scary */
mode[1] = *type++;
--tlen;
writing = 1;
}
if (*type == '|') {
if (num_svs && (tlen != 2 || type[1] != '-')) {
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 */
dTHR;
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] == '|') {
dTHR;
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 == '>') {
TAINT_PROPER("open");
type++;
if (*type == '>') {
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 */
PerlIO_seek(fp, 0, SEEK_CUR);
/* 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);
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 (strEQ(type,"-")) {
fp = PerlIO_stdout();
IoTYPE(io) = IoTYPE_STD;
}
else {
fp = PerlIO_open((num_svs ? name : type), mode);
}
}
}
else if (*type == '<') {
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 (strEQ(type,"-")) {
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
}
else
fp = PerlIO_open((num_svs ? name : type), mode);
}
else if (tlen > 1 && type[tlen-1] == '|') {
if (num_svs) {
if (tlen != 2 || type[0] != '-')
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 */
dTHR;
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) {
dTHR;
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) {
dTHR;
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
) {
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);
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) {
dTHR;
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) {
dTHR;
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 {
dTHR;
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) {
dTHR;
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)
{
dTHR;
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);
}
{
dTHR;
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
}
SETERRNO(EBADF,RMS$_IFI);
return (Off_t)-1;
}
bool
Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
{
register IO *io;
register PerlIO *fp;
if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
#ifdef ULTRIX_STDIO_BOTCH
if (PerlIO_eof(fp))
(void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
#endif
return PerlIO_seek(fp, pos, whence) >= 0;
}
{
dTHR;
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
}
SETERRNO(EBADF,RMS$_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);
{
dTHR;
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;
}