forked from schacon/perl
/
doio.c
2452 lines (2305 loc) · 61.1 KB
/
doio.c
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/* doio.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* 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."
*/
/* This file contains functions that do the actual I/O on behalf of ops.
* For example, pp_print() calls the do_print() function in this file for
* each argument needing printing.
*/
#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
#define PERL_MODE_MAX 8
#define PERL_FLAGS_MAX 10
#include <signal.h>
bool
Perl_do_openn(pTHX_ GV *gv, register char *oname, I32 len, int as_raw,
int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
I32 num_svs)
{
register IO * const io = GvIOn(gv);
PerlIO *saveifp = NULL;
PerlIO *saveofp = NULL;
int savefd = -1;
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;
char *type = NULL;
char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
SV *namesv;
Zero(mode,sizeof(mode),char);
PL_forkprocess = 1; /* assume true if no fork */
/* Collect default raw/crlf info from the op */
if (PL_op && PL_op->op_type == OP_OPEN) {
/* set up IO layers */
const 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 currently open - close before we re-open */
if (IoIFP(io)) {
fd = PerlIO_fileno(IoIFP(io));
if (IoTYPE(io) == IoTYPE_STD) {
/* This is a clone of one of STD* handles */
result = 0;
}
else if (fd >= 0 && fd <= PL_maxsysfd) {
/* This is one of the original STD* handles */
saveifp = IoIFP(io);
saveofp = IoOFP(io);
savetype = IoTYPE(io);
savefd = fd;
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) {
/* Why is this not Perl_warn*() call ? */
PerlIO_printf(Perl_error_log,
"Warning: unable to close filehandle %s properly.\n",
GvENAME(gv));
}
IoOFP(io) = IoIFP(io) = NULL;
}
if (as_raw) {
/* sysopen style args, i.e. integer mode and permissions */
STRLEN ix = 0;
const int appendtrunc =
0
#ifdef O_APPEND /* Not fully portable. */
|O_APPEND
#endif
#ifdef O_TRUNC /* Not fully portable. */
|O_TRUNC
#endif
;
const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
int ismodifying;
if (num_svs != 0) {
Perl_croak(aTHX_ "panic: sysopen with multiple args");
}
/* It's not always
O_RDONLY 0
O_WRONLY 1
O_RDWR 2
It might be (in OS/390 and Mac OS Classic it is)
O_WRONLY 1
O_RDONLY 2
O_RDWR 3
This means that simple & with O_RDWR would look
like O_RDONLY is present. Therefore we have to
be more careful.
*/
if ((ismodifying = (rawmode & modifyingmode))) {
if ((ismodifying & O_WRONLY) == O_WRONLY ||
(ismodifying & O_RDWR) == O_RDWR ||
(ismodifying & (O_CREAT|appendtrunc)))
TAINT_PROPER("sysopen");
}
mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
rawmode |= O_LARGEFILE; /* Transparently largefiley. */
#endif
IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
namesv = newSVpvn_flags(oname, len, SVs_TEMP);
num_svs = 1;
svp = &namesv;
type = NULL;
fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
}
else {
/* Regular (non-sys) open */
char *name;
STRLEN olen = len;
char *tend;
int dodup = 0;
type = savepvn(oname, len);
tend = type+len;
SAVEFREEPV(type);
/* Lose leading and trailing white space */
while (isSPACE(*type))
type++;
while (tend > type && isSPACE(tend[-1]))
*--tend = '\0';
if (num_svs) {
/* New style explicit name, type is just mode and layer info */
#ifdef USE_STDIO
if (SvROK(*svp) && !strchr(oname,'&')) {
if (ckWARN(WARN_IO))
Perl_warner(aTHX_ packWARN(WARN_IO),
"Can't open a reference");
SETERRNO(EINVAL, LIB_INVARG);
goto say_false;
}
#endif /* USE_STDIO */
name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
SAVEFREEPV(name);
}
else {
name = type;
len = tend-type;
}
IoTYPE(io) = *type;
if ((*type == IoTYPE_RDWR) && /* scary */
(*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
TAINT_PROPER("open");
mode[1] = *type++;
writing = 1;
}
if (*type == IoTYPE_PIPE) {
if (num_svs) {
if (type[1] != IoTYPE_STD) {
unknown_open_mode:
Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
}
type++;
}
do {
type++;
} while (isSPACE(*type));
if (!num_svs) {
name = type;
len = tend-type;
}
if (*name == '\0') {
/* command is missing 19990114 */
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
errno = EPIPE;
goto say_false;
}
if (!(*name == '-' && name[1] == '\0') || num_svs)
TAINT_ENV();
TAINT_PROPER("piped open");
if (!num_svs && name[len-1] == '|') {
name[--len] = '\0' ;
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
}
mode[0] = 'w';
writing = 1;
if (out_raw)
mode[1] = 'b';
else if (out_crlf)
mode[1] = 't';
if (num_svs > 1) {
fp = PerlProc_popen_list(mode, num_svs, svp);
}
else {
fp = PerlProc_popen(name,mode);
}
if (num_svs) {
if (*type) {
if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
goto say_false;
}
}
}
} /* IoTYPE_PIPE */
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++;
}
else {
mode[0] = 'w';
}
writing = 1;
if (out_raw)
mode[1] = 'b';
else if (out_crlf)
mode[1] = 't';
if (*type == '&') {
duplicity:
dodup = PERLIO_DUP_FD;
type++;
if (*type == '=') {
dodup = 0;
type++;
}
if (!num_svs && !*type && supplied_fp) {
/* "<+&" etc. is used by typemaps */
fp = supplied_fp;
}
else {
PerlIO *that_fp = NULL;
if (num_svs > 1) {
Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
}
while (isSPACE(*type))
type++;
if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
fd = SvUV(*svp);
num_svs = 0;
}
else if (isDIGIT(*type)) {
fd = atoi(type);
}
else {
const IO* thatio;
if (num_svs) {
thatio = sv_2io(*svp);
}
else {
GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
0, SVt_PVIO);
thatio = GvIO(thatgv);
}
if (!thatio) {
#ifdef EINVAL
SETERRNO(EINVAL,SS_IVCHAN);
#endif
goto say_false;
}
if ((that_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.
-- Nicholas Clark */
if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
PerlIO_clearerr(that_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(that_fp);
fd = PerlIO_fileno(that_fp);
/* When dup()ing STDIN, STDOUT or STDERR
* explicitly set appropriate access mode */
if (that_fp == PerlIO_stdout()
|| that_fp == PerlIO_stderr())
IoTYPE(io) = IoTYPE_WRONLY;
else if (that_fp == 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 (!num_svs)
type = NULL;
if (that_fp) {
fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
}
else {
if (dodup)
fd = PerlLIO_dup(fd);
else
was_fdopen = TRUE;
if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
if (dodup && fd >= 0)
PerlLIO_close(fd);
}
}
}
} /* & */
else {
while (isSPACE(*type))
type++;
if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
type++;
fp = PerlIO_stdout();
IoTYPE(io) = IoTYPE_STD;
if (num_svs > 1) {
Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
}
}
else {
if (!num_svs) {
namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
num_svs = 1;
svp = &namesv;
type = NULL;
}
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
}
} /* !& */
if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
goto unknown_open_mode;
} /* IoTYPE_WRONLY */
else if (*type == IoTYPE_RDONLY) {
do {
type++;
} while (isSPACE(*type));
mode[0] = 'r';
if (in_raw)
mode[1] = 'b';
else if (in_crlf)
mode[1] = 't';
if (*type == '&') {
goto duplicity;
}
if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
type++;
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
if (num_svs > 1) {
Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
}
}
else {
if (!num_svs) {
namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
num_svs = 1;
svp = &namesv;
type = NULL;
}
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
}
if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
goto unknown_open_mode;
} /* IoTYPE_RDONLY */
else if ((num_svs && /* '-|...' or '...|' */
type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
(!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
if (num_svs) {
type += 2; /* skip over '-|' */
}
else {
*--tend = '\0';
while (tend > type && isSPACE(tend[-1]))
*--tend = '\0';
for (; isSPACE(*type); type++)
;
name = type;
len = tend-type;
}
if (*name == '\0') {
/* command is missing 19990114 */
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
errno = EPIPE;
goto say_false;
}
if (!(*name == '-' && name[1] == '\0') || num_svs)
TAINT_ENV();
TAINT_PROPER("piped open");
mode[0] = 'r';
if (in_raw)
mode[1] = 'b';
else if (in_crlf)
mode[1] = 't';
if (num_svs > 1) {
fp = PerlProc_popen_list(mode,num_svs,svp);
}
else {
fp = PerlProc_popen(name,mode);
}
IoTYPE(io) = IoTYPE_PIPE;
if (num_svs) {
while (isSPACE(*type))
type++;
if (*type) {
if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
goto say_false;
}
}
}
}
else { /* layer(Args) */
if (num_svs)
goto unknown_open_mode;
name = type;
IoTYPE(io) = IoTYPE_RDONLY;
for (; isSPACE(*name); name++)
;
mode[0] = 'r';
if (in_raw)
mode[1] = 'b';
else if (in_crlf)
mode[1] = 't';
if (*name == '-' && name[1] == '\0') {
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
}
else {
if (!num_svs) {
namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
num_svs = 1;
svp = &namesv;
type = NULL;
}
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
}
}
}
if (!fp) {
if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
&& strchr(oname, '\n')
)
Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
goto say_false;
}
if (ckWARN(WARN_IO)) {
if ((IoTYPE(io) == IoTYPE_RDONLY) &&
(fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
Perl_warner(aTHX_ packWARN(WARN_IO),
"Filehandle STD%s reopened as %s only for input",
((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
GvENAME(gv));
}
else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
Perl_warner(aTHX_ packWARN(WARN_IO),
"Filehandle STDIN reopened as %s only for output",
GvENAME(gv));
}
}
fd = PerlIO_fileno(fp);
/* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
* socket - this covers PerlIO::scalar - otherwise unless we "know" the
* type probe for socket-ness.
*/
if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
/* If PerlIO claims to have fd we had better be able to fstat() it. */
(void) PerlIO_close(fp);
goto say_false;
}
#ifndef PERL_MICRO
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(fd, (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 /* HAS_SOCKET */
#endif /* !PERL_MICRO */
}
/* Eeek - FIXME !!!
* If this is a standard handle we discard all the layer stuff
* and just dup the fd into whatever was on the handle before !
*/
if (saveifp) { /* must use old fp? */
/* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
then dup the new fileno down
*/
if (saveofp) {
PerlIO_flush(saveofp); /* emulate PerlIO_close() */
if (saveofp != saveifp) { /* was a socket? */
PerlIO_close(saveofp);
}
}
if (savefd != fd) {
/* Still a small can-of-worms here if (say) PerlIO::scalar
is assigned to (say) STDOUT - for now let dup2() fail
and provide the error
*/
if (PerlLIO_dup2(fd, savefd) < 0) {
(void)PerlIO_close(fp);
goto say_false;
}
#ifdef VMS
if (savefd != PerlIO_fileno(PerlIO_stdin())) {
char newname[FILENAME_MAX+1];
if (PerlIO_getname(fp, newname)) {
if (fd == PerlIO_fileno(PerlIO_stdout()))
Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
if (fd == PerlIO_fileno(PerlIO_stderr()))
Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
}
}
#endif
#if !defined(WIN32)
/* PL_fdpid isn't used on Windows, so avoid this useless work.
* XXX Probably the same for a lot of other places. */
{
Pid_t pid;
SV *sv;
LOCK_FDPID_MUTEX;
sv = *av_fetch(PL_fdpid,fd,TRUE);
(void)SvUPGRADE(sv, SVt_IV);
pid = SvIVX(sv);
SvIV_set(sv, 0);
sv = *av_fetch(PL_fdpid,savefd,TRUE);
(void)SvUPGRADE(sv, SVt_IV);
SvIV_set(sv, pid);
UNLOCK_FDPID_MUTEX;
}
#endif
if (was_fdopen) {
/* need to close fp without closing underlying fd */
int ofd = PerlIO_fileno(fp);
int dupfd = PerlLIO_dup(ofd);
#if defined(HAS_FCNTL) && defined(F_SETFD)
/* Assume if we have F_SETFD we have F_GETFD */
int coe = fcntl(ofd,F_GETFD);
#endif
PerlIO_close(fp);
PerlLIO_dup2(dupfd,ofd);
#if defined(HAS_FCNTL) && defined(F_SETFD)
/* The dup trick has lost close-on-exec on ofd */
fcntl(ofd,F_SETFD, coe);
#endif
PerlLIO_close(dupfd);
}
else
PerlIO_close(fp);
}
fp = saveifp;
PerlIO_clearerr(fp);
fd = PerlIO_fileno(fp);
}
#if defined(HAS_FCNTL) && defined(F_SETFD)
if (fd >= 0) {
const int save_errno = errno;
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 && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
char *s = mode;
if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
s++;
*s = 'w';
if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
PerlIO_close(fp);
IoIFP(io) = NULL;
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 * const io = GvIOp(gv);
if (!PL_argvoutgv)
PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
IoFLAGS(io) &= ~IOf_START;
if (PL_inplace) {
assert(PL_defoutgv);
Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
SvREFCNT_inc_simple_NN(PL_defoutgv));
}
}
if (PL_filemode & (S_ISUID|S_ISGID)) {
PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
#ifdef HAS_FCHMOD
if (PL_lastfd != -1)
(void)fchmod(PL_lastfd,PL_filemode);
#else
(void)PerlLIO_chmod(PL_oldname,PL_filemode);
#endif
}
PL_lastfd = -1;
PL_filemode = 0;
if (!GvAV(gv))
return NULL;
while (av_len(GvAV(gv)) >= 0) {
STRLEN oldlen;
sv = av_shift(GvAV(gv));
SAVEFREESV(sv);
sv_setsv(GvSVn(gv),sv);
SvSETMAGIC(GvSV(gv));
PL_oldname = SvPVx(GvSV(gv), oldlen);
if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
if (PL_inplace) {
TAINT_PROPER("inplace open");
if (oldlen == 1 && *PL_oldname == '-') {
setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
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_ packWARN(WARN_INPLACE),
"Can't do inplace edit: %s is not a regular file",
PL_oldname );
do_close(gv,FALSE);
continue;
}
if (*PL_inplace) {
const char *star = strchr(PL_inplace, '*');
if (star) {
const 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_const(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_ packWARN(WARN_INPLACE),
"Can't do inplace edit: %"SVf" would not be unique",
sv);
do_close(gv,FALSE);
continue;
}
#endif
#ifdef HAS_RENAME
#if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ packWARN(WARN_INPLACE),
"Can't rename %s to %"SVf": %s, skipping file",
PL_oldname, (void*)sv, Strerror(errno));
do_close(gv,FALSE);
continue;
}
#else
do_close(gv,FALSE);
(void)PerlLIO_unlink(SvPVX_const(sv));
(void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
O_RDONLY,0,NULL);
#endif /* DOSISH */
#else
(void)UNLINK(SvPVX_const(sv));
if (link(PL_oldname,SvPVX_const(sv)) < 0) {
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ packWARN(WARN_INPLACE),
"Can't rename %s to %"SVf": %s, skipping file",
PL_oldname, 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_ packWARN(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,(char*)SvPVX_const(sv),SvCUR(sv),
PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,NULL))
#else
if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
NULL))
#endif
{
if (ckWARN_d(WARN_INPLACE))
Perl_warner(aTHX_ packWARN(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)) {
const int eno = errno;
if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
&& !S_ISREG(PL_statbuf.st_mode))
{
Perl_warner(aTHX_ packWARN(WARN_INPLACE),
"Can't do inplace edit: %s is not a regular file",
PL_oldname);
}
else
Perl_warner(aTHX_ packWARN(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 * const oldout = (GV*)av_pop(PL_argvout_stack);
setdefout(oldout);
SvREFCNT_dec(oldout);
return NULL;
}
setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
}
return NULL;
}
/* 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 || !isGV_with_GP(gv)) {
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;
if (IoIFP(io)) {
if (IoTYPE(io) == IoTYPE_PIPE) {
const int status = PerlProc_pclose(IoIFP(io));
if (not_implicit) {
STATUS_NATIVE_CHILD_SET(status);
retval = (STATUS_UNIX == 0);
}
else {
retval = (status != -1);
}
}
else if (IoTYPE(io) == IoTYPE_STD)
retval = TRUE;
else {
if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
const bool prev_err = PerlIO_error(IoOFP(io));
retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
}
else {
const bool prev_err = PerlIO_error(IoIFP(io));
retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
}
}
IoOFP(io) = IoIFP(io) = NULL;
}
else if (not_implicit) {
SETERRNO(EBADF,SS_IVCHAN);
}
return retval;
}
bool
Perl_do_eof(pTHX_ GV *gv)
{
register IO * const io = GvIO(gv);
if (!io)
return TRUE;
else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
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 */
}
{