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tag: perl-5.003_03
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/* doio.c
*
* Copyright (c) 1991-1994, 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"
#include "perl.h"
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
#include <sys/ipc.h>
#ifdef HAS_MSG
#include <sys/msg.h>
#endif
#ifdef HAS_SEM
#include <sys/sem.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
#include <utime.h>
#endif
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#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>
# include <netdb.h>
# ifndef ENOTSOCK
# ifdef I_NET_ERRNO
# include <net/errno.h>
# endif
# endif
#endif
bool
do_open(gv,name,len,as_raw,rawmode,rawperm,supplied_fp)
GV *gv;
register char *name;
I32 len;
int as_raw;
int rawmode, rawperm;
PerlIO *supplied_fp;
{
register IO *io = GvIOn(gv);
PerlIO *saveifp = Nullfp;
PerlIO *saveofp = Nullfp;
char savetype = ' ';
int writing = 0;
PerlIO *fp;
int fd;
int result;
forkprocess = 1; /* assume true if no fork */
if (IoIFP(io)) {
fd = PerlIO_fileno(IoIFP(io));
if (IoTYPE(io) == '-')
result = 0;
else if (fd <= maxsysfd) {
saveifp = IoIFP(io);
saveofp = IoOFP(io);
savetype = IoTYPE(io);
result = 0;
}
else if (IoTYPE(io) == '|')
result = my_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 > maxsysfd)
PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
GvENAME(gv));
IoOFP(io) = IoIFP(io) = Nullfp;
}
if (as_raw) {
result = rawmode & 3;
IoTYPE(io) = "<>++"[result];
writing = (result > 0);
fd = open(name, rawmode, rawperm);
if (fd == -1)
fp = NULL;
else {
fp = PerlIO_fdopen(fd, ((result == 0) ? "r"
: (result == 1) ? "w"
: "r+"));
if (!fp)
close(fd);
}
}
else {
char *myname;
char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
int dodup;
myname = savepvn(name, len);
SAVEFREEPV(myname);
name = myname;
while (len && isSPACE(name[len-1]))
name[--len] = '\0';
mode[0] = mode[1] = mode[2] = '\0';
IoTYPE(io) = *name;
if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
mode[1] = *name++;
--len;
writing = 1;
}
if (*name == '|') {
/*SUPPRESS 530*/
for (name++; isSPACE(*name); name++) ;
if (strNE(name,"-"))
TAINT_ENV();
TAINT_PROPER("piped open");
if (dowarn && name[strlen(name)-1] == '|')
warn("Can't do bidirectional pipe");
fp = my_popen(name,"w");
writing = 1;
}
else if (*name == '>') {
TAINT_PROPER("open");
name++;
if (*name == '>') {
mode[0] = IoTYPE(io) = 'a';
name++;
}
else
mode[0] = 'w';
writing = 1;
if (*name == '&') {
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)) {
fd = PerlIO_fileno(IoIFP(thatio));
if (IoTYPE(thatio) == 's')
IoTYPE(io) = 's';
}
else
fd = -1;
}
if (dodup)
fd = dup(fd);
if (!(fp = PerlIO_fdopen(fd,mode))) {
if (dodup)
close(fd);
}
}
}
else {
/*SUPPRESS 530*/
for (; isSPACE(*name); name++) ;
if (strEQ(name,"-")) {
fp = PerlIO_stdout();
IoTYPE(io) = '-';
}
else {
fp = PerlIO_open(name,mode);
}
}
}
else if (*name == '<') {
/*SUPPRESS 530*/
for (name++; isSPACE(*name); name++) ;
mode[0] = 'r';
if (*name == '&')
goto duplicity;
if (strEQ(name,"-")) {
fp = PerlIO_stdin();
IoTYPE(io) = '-';
}
else
fp = PerlIO_open(name,mode);
}
else if (name[len-1] == '|') {
name[--len] = '\0';
while (len && isSPACE(name[len-1]))
name[--len] = '\0';
/*SUPPRESS 530*/
for (; isSPACE(*name); name++) ;
if (strNE(name,"-"))
TAINT_ENV();
TAINT_PROPER("piped open");
fp = my_popen(name,"r");
IoTYPE(io) = '|';
}
else {
IoTYPE(io) = '<';
/*SUPPRESS 530*/
for (; isSPACE(*name); name++) ;
if (strEQ(name,"-")) {
fp = PerlIO_stdin();
IoTYPE(io) = '-';
}
else
fp = PerlIO_open(name,"r");
}
}
if (!fp) {
if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
warn(warn_nl, "open");
goto say_false;
}
if (IoTYPE(io) &&
IoTYPE(io) != '|' && IoTYPE(io) != '-') {
if (Fstat(PerlIO_fileno(fp),&statbuf) < 0) {
(void)PerlIO_close(fp);
goto say_false;
}
if (S_ISSOCK(statbuf.st_mode))
IoTYPE(io) = 's'; /* in case a socket was passed in to us */
#ifdef HAS_SOCKET
else if (
#ifdef S_IFMT
!(statbuf.st_mode & S_IFMT)
#else
!statbuf.st_mode
#endif
) {
int buflen = sizeof tokenbuf;
if (getsockname(PerlIO_fileno(fp), (struct sockaddr *)tokenbuf, &buflen) >= 0
|| errno != ENOTSOCK)
IoTYPE(io) = 's'; /* 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)) {
int pid;
SV *sv;
dup2(PerlIO_fileno(fp), fd);
sv = *av_fetch(fdpid,PerlIO_fileno(fp),TRUE);
(void)SvUPGRADE(sv, SVt_IV);
pid = SvIVX(sv);
SvIVX(sv) = 0;
sv = *av_fetch(fdpid,fd,TRUE);
(void)SvUPGRADE(sv, SVt_IV);
SvIVX(sv) = pid;
PerlIO_close(fp);
}
fp = saveifp;
PerlIO_clearerr(fp);
}
#if defined(HAS_FCNTL) && defined(F_SETFD)
fd = PerlIO_fileno(fp);
fcntl(fd,F_SETFD,fd > maxsysfd);
#endif
IoIFP(io) = fp;
if (writing) {
if (IoTYPE(io) == 's'
|| (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) {
if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
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 *
nextargv(gv)
register GV *gv;
{
register SV *sv;
#ifndef FLEXFILENAMES
int filedev;
int fileino;
#endif
int fileuid;
int filegid;
if (!argvoutgv)
argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
if (filemode & (S_ISUID|S_ISGID)) {
PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
#ifdef HAS_FCHMOD
(void)fchmod(lastfd,filemode);
#else
(void)chmod(oldname,filemode);
#endif
}
filemode = 0;
while (av_len(GvAV(gv)) >= 0) {
STRLEN len;
sv = av_shift(GvAV(gv));
SAVEFREESV(sv);
sv_setsv(GvSV(gv),sv);
SvSETMAGIC(GvSV(gv));
oldname = SvPVx(GvSV(gv), len);
if (do_open(gv,oldname,len,FALSE,0,0,Nullfp)) {
if (inplace) {
TAINT_PROPER("inplace open");
if (strEQ(oldname,"-")) {
setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
return IoIFP(GvIOp(gv));
}
#ifndef FLEXFILENAMES
filedev = statbuf.st_dev;
fileino = statbuf.st_ino;
#endif
filemode = statbuf.st_mode;
fileuid = statbuf.st_uid;
filegid = statbuf.st_gid;
if (!S_ISREG(filemode)) {
warn("Can't do inplace edit: %s is not a regular file",
oldname );
do_close(gv,FALSE);
continue;
}
if (*inplace) {
#ifdef SUFFIX
add_suffix(sv,inplace);
#else
sv_catpv(sv,inplace);
#endif
#ifndef FLEXFILENAMES
if (Stat(SvPVX(sv),&statbuf) >= 0
&& statbuf.st_dev == filedev
&& statbuf.st_ino == fileino ) {
warn("Can't do inplace edit: %s > 14 characters",
SvPVX(sv) );
do_close(gv,FALSE);
continue;
}
#endif
#ifdef HAS_RENAME
#ifndef DOSISH
if (rename(oldname,SvPVX(sv)) < 0) {
warn("Can't rename %s to %s: %s, skipping file",
oldname, SvPVX(sv), Strerror(errno) );
do_close(gv,FALSE);
continue;
}
#else
do_close(gv,FALSE);
(void)unlink(SvPVX(sv));
(void)rename(oldname,SvPVX(sv));
do_open(gv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp);
#endif /* MSDOS */
#else
(void)UNLINK(SvPVX(sv));
if (link(oldname,SvPVX(sv)) < 0) {
warn("Can't rename %s to %s: %s, skipping file",
oldname, SvPVX(sv), Strerror(errno) );
do_close(gv,FALSE);
continue;
}
(void)UNLINK(oldname);
#endif
}
else {
#ifndef DOSISH
if (UNLINK(oldname) < 0) {
warn("Can't rename %s to %s: %s, skipping file",
oldname, SvPVX(sv), Strerror(errno) );
do_close(gv,FALSE);
continue;
}
#else
croak("Can't do inplace edit without backup");
#endif
}
sv_setpvn(sv,">",1);
sv_catpv(sv,oldname);
SETERRNO(0,0); /* in case sprintf set errno */
if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp)) {
warn("Can't do inplace edit on %s: %s",
oldname, Strerror(errno) );
do_close(gv,FALSE);
continue;
}
setdefout(argvoutgv);
lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
(void)Fstat(lastfd,&statbuf);
#ifdef HAS_FCHMOD
(void)fchmod(lastfd,filemode);
#else
(void)chmod(oldname,filemode);
#endif
if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
#ifdef HAS_FCHOWN
(void)fchown(lastfd,fileuid,filegid);
#else
#ifdef HAS_CHOWN
(void)chown(oldname,fileuid,filegid);
#endif
#endif
}
}
return IoIFP(GvIOp(gv));
}
else
PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",SvPV(sv, na), Strerror(errno));
}
if (inplace) {
(void)do_close(argvoutgv,FALSE);
setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
}
return Nullfp;
}
#ifdef HAS_PIPE
void
do_pipe(sv, rgv, wgv)
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 (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(wstio) = '>';
if (!IoIFP(rstio) || !IoOFP(wstio)) {
if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
else close(fd[0]);
if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
else close(fd[1]);
goto badexit;
}
sv_setsv(sv,&sv_yes);
return;
badexit:
sv_setsv(sv,&sv_undef);
return;
}
#endif
/* explicit renamed to avoid C++ conflict -- kja */
bool
#ifndef CAN_PROTOTYPE
do_close(gv,not_implicit)
GV *gv;
bool not_implicit;
#else
do_close(GV *gv, bool not_implicit)
#endif /* CAN_PROTOTYPE */
{
bool retval;
IO *io;
if (!gv)
gv = argvgv;
if (!gv || SvTYPE(gv) != SVt_PVGV) {
SETERRNO(EBADF,SS$_IVCHAN);
return FALSE;
}
io = GvIO(gv);
if (!io) { /* never opened */
if (dowarn && not_implicit)
warn("Close on unopened file <%s>",GvENAME(gv));
return FALSE;
}
retval = io_close(io);
if (not_implicit) {
IoLINES(io) = 0;
IoPAGE(io) = 0;
IoLINES_LEFT(io) = IoPAGE_LEN(io);
}
IoTYPE(io) = ' ';
return retval;
}
bool
io_close(io)
IO* io;
{
bool retval = FALSE;
int status;
if (IoIFP(io)) {
if (IoTYPE(io) == '|') {
status = my_pclose(IoIFP(io));
retval = (status == 0);
statusvalue = FIXSTATUS(status);
}
else if (IoTYPE(io) == '-')
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;
}
return retval;
}
bool
do_eof(gv)
GV *gv;
{
register IO *io;
int ch;
io = GvIO(gv);
if (!io)
return TRUE;
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 (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
if (!nextargv(argvgv)) /* get another fp handy */
return TRUE;
}
else
return TRUE; /* normal fp, definitely end of file */
}
return TRUE;
}
long
do_tell(gv)
GV *gv;
{
register IO *io;
if (!gv)
goto phooey;
io = GvIO(gv);
if (!io || !IoIFP(io))
goto phooey;
#ifdef ULTRIX_STDIO_BOTCH
if (PerlIO_eof(IoIFP(io)))
(void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
#endif
return PerlIO_tell(IoIFP(io));
phooey:
if (dowarn)
warn("tell() on unopened file");
SETERRNO(EBADF,RMS$_IFI);
return -1L;
}
bool
do_seek(gv, pos, whence)
GV *gv;
long pos;
int whence;
{
register IO *io;
if (!gv)
goto nuts;
io = GvIO(gv);
if (!io || !IoIFP(io))
goto nuts;
#ifdef ULTRIX_STDIO_BOTCH
if (PerlIO_eof(IoIFP(io)))
(void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
#endif
return PerlIO_seek(IoIFP(io), pos, whence) >= 0;
nuts:
if (dowarn)
warn("seek() on unopened file");
SETERRNO(EBADF,RMS$_IFI);
return FALSE;
}
#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 */
{
extern long lseek();
struct flock fl;
struct stat filebuf;
if (Fstat(fd, &filebuf) < 0)
return -1;
if (filebuf.st_size < length) {
/* extend file length */
if ((lseek(fd, (length - 1), 0)) < 0)
return -1;
/* write a "0" byte */
if ((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 */
I32
looks_like_number(sv)
SV *sv;
{
register char *s;
register char *send;
if (!SvPOK(sv)) {
STRLEN len;
if (!SvPOKp(sv))
return TRUE;
s = SvPV(sv, len);
send = s + len;
}
else {
s = SvPVX(sv);
send = s + SvCUR(sv);
}
while (isSPACE(*s))
s++;
if (s >= send)
return FALSE;
if (*s == '+' || *s == '-')
s++;
while (isDIGIT(*s))
s++;
if (s == send)
return TRUE;
if (*s == '.')
s++;
else if (s == SvPVX(sv))
return FALSE;
while (isDIGIT(*s))
s++;
if (s == send)
return TRUE;
if (*s == 'e' || *s == 'E') {
s++;
if (*s == '+' || *s == '-')
s++;
while (isDIGIT(*s))
s++;
}
while (isSPACE(*s))
s++;
if (s >= send)
return TRUE;
return FALSE;
}
bool
do_print(sv,fp)
register SV *sv;
PerlIO *fp;
{
register char *tmps;
STRLEN len;
/* assuming fp is checked earlier */
if (!sv)
return TRUE;
if (ofmt) {
if (SvGMAGICAL(sv))
mg_get(sv);
if (SvIOK(sv) && SvIVX(sv) != 0) {
PerlIO_printf(fp, ofmt, (double)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, ofmt, SvNVX(sv));
return !PerlIO_error(fp);
}
}
switch (SvTYPE(sv)) {
case SVt_NULL:
if (dowarn)
warn(warn_uninit);
return TRUE;
case SVt_IV:
if (SvIOK(sv)) {
if (SvGMAGICAL(sv))
mg_get(sv);
PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
return !PerlIO_error(fp);
}
/* FALL THROUGH */
default:
tmps = SvPV(sv, len);
break;
}
if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
return FALSE;
return !PerlIO_error(fp);
}
I32
my_stat(ARGS)
dARGS
{
dSP;
IO *io;
GV* tmpgv;
if (op->op_flags & OPf_REF) {
EXTEND(sp,1);
tmpgv = cGVOP->op_gv;
do_fstat:
io = GvIO(tmpgv);
if (io && IoIFP(io)) {
statgv = tmpgv;
sv_setpv(statname,"");
laststype = OP_STAT;
return (laststatval = Fstat(PerlIO_fileno(IoIFP(io)), &statcache));
}
else {
if (tmpgv == defgv)
return laststatval;
if (dowarn)
warn("Stat on unopened file <%s>",
GvENAME(tmpgv));
statgv = Nullgv;
sv_setpv(statname,"");
return (laststatval = -1);
}
}
else {
SV* sv = POPs;
PUTBACK;
if (SvTYPE(sv) == SVt_PVGV) {
tmpgv = (GV*)sv;
goto do_fstat;
}
else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
tmpgv = (GV*)SvRV(sv);
goto do_fstat;
}
statgv = Nullgv;
sv_setpv(statname,SvPV(sv, na));
laststype = OP_STAT;
laststatval = Stat(SvPV(sv, na),&statcache);
if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
warn(warn_nl, "stat");
return laststatval;
}
}
I32
my_lstat(ARGS)
dARGS
{
dSP;
SV *sv;
if (op->op_flags & OPf_REF) {
EXTEND(sp,1);
if (cGVOP->op_gv == defgv) {
if (laststype != OP_LSTAT)
croak("The stat preceding -l _ wasn't an lstat");
return laststatval;
}
croak("You can't use -l on a filehandle");
}
laststype = OP_LSTAT;
statgv = Nullgv;
sv = POPs;
PUTBACK;
sv_setpv(statname,SvPV(sv, na));
#ifdef HAS_LSTAT
laststatval = lstat(SvPV(sv, na),&statcache);
#else
laststatval = Stat(SvPV(sv, na),&statcache);
#endif
if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
warn(warn_nl, "lstat");
return laststatval;
}
bool
do_aexec(really,mark,sp)
SV *really;
register SV **mark;
register SV **sp;
{
register char **a;
char *tmps;
if (sp > mark) {
New(401,Argv, sp - mark + 1, char*);
a = Argv;
while (++mark <= sp) {
if (*mark)
*a++ = SvPVx(*mark, na);
else
*a++ = "";
}
*a = Nullch;
if (*Argv[0] != '/') /* will execvp use PATH? */
TAINT_ENV(); /* testing IFS here is overkill, probably */
if (really && *(tmps = SvPV(really, na)))
execvp(tmps,Argv);
else
execvp(Argv[0],Argv);
if (dowarn)
warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
}
do_execfree();
return FALSE;
}
void
do_execfree()
{
if (Argv) {
Safefree(Argv);
Argv = Null(char **);
}
if (Cmd) {
Safefree(Cmd);
Cmd = Nullch;
}
}
#ifndef OS2
bool
do_exec(cmd)
char *cmd;
{
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,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
strcpy(flags,"-c");
s = cmd+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';
execl(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 && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
if (*s == '=')
goto doshell;
for (s = cmd; *s; s++) {
if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
if (*s == '\n' && !s[1]) {
*s = '\0';
break;
}
doshell:
execl(SH_PATH, "sh", "-c", cmd, (char*)0);
return FALSE;
}
}
New(402,Argv, (s - cmd) / 2 + 2, char*);
Cmd = savepvn(cmd, s-cmd);
a = Argv;
for (s = Cmd; *s;) {
while (*s && isSPACE(*s)) s++;
if (*s)
*(a++) = s;
while (*s && !isSPACE(*s)) s++;
if (*s)
*s++ = '\0';
}
*a = Nullch;
if (Argv[0]) {
execvp(Argv[0],Argv);
if (errno == ENOEXEC) { /* for system V NIH syndrome */
do_execfree();
goto doshell;
}
if (dowarn)
warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
}
do_execfree();
return FALSE;
}
#endif
I32
apply(type,mark,sp)
I32 type;
register SV **mark;
register SV **sp;
{
register I32 val;
register I32 val2;
register I32 tot = 0;
char *s;
SV **oldmark = mark;
if (tainting) {
while (++mark <= sp) {
MAGIC *mg;
if (SvMAGICAL(*mark) && (mg = mg_find(*mark, 't')) && mg->mg_len & 1)
tainted = TRUE;
}
mark = oldmark;
}
switch (type) {
case OP_CHMOD:
TAINT_PROPER("chmod");
if (++mark <= sp) {
tot = sp - mark;
val = SvIVx(*mark);
while (++mark <= sp) {
if (chmod(SvPVx(*mark, na),val))
tot--;
}
}
break;
#ifdef HAS_CHOWN
case OP_CHOWN:
TAINT_PROPER("chown");
if (sp - mark > 2) {
val = SvIVx(*++mark);
val2 = SvIVx(*++mark);
tot = sp - mark;
while (++mark <= sp) {
if (chown(SvPVx(*mark, na),val,val2))
tot--;
}
}
break;
#endif
#ifdef HAS_KILL
case OP_KILL:
TAINT_PROPER("kill");
s = SvPVx(*++mark, na);
tot = sp - mark;
if (isUPPER(*s)) {
if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
s += 3;
if (!(val = whichsig(s)))
croak("Unrecognized signal name \"%s\"",s);
}
else
val = SvIVx(*mark);
#ifdef VMS
/* kill() doesn't do process groups (job trees?) under VMS */
if (val < 0) val = -val;
if (val == SIGKILL) {
# include <starlet.h>
/* Use native sys$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;
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);
#ifdef HAS_KILLPG
if (killpg(proc,val)) /* BSD */
#else
if (kill(-proc,val)) /* SYSV */
#endif
tot--;
}
}
else {
while (++mark <= sp) {
if (kill(SvIVx(*mark),val))
tot--;
}
}
break;
#endif
case OP_UNLINK:
TAINT_PROPER("unlink");
tot = sp - mark;
while (++mark <= sp) {
s = SvPVx(*mark, na);
if (euid || unsafe) {
if (UNLINK(s))
tot--;
}
else { /* don't let root wipe out directories without -U */
#ifdef HAS_LSTAT
if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
#else
if (Stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
#endif
tot--;
else {
if (UNLINK(s))
tot--;
}
}
}
break;
#ifdef HAS_UTIME
case OP_UTIME:
TAINT_PROPER("utime");
if (sp - mark > 2) {
#if defined(I_UTIME) || defined(VMS)
struct utimbuf utbuf;
#else
struct {
long actime;
long 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 = SvIVx(*++mark); /* time accessed */
utbuf.modtime = SvIVx(*++mark); /* time modified */
#endif
tot = sp - mark;
while (++mark <= sp) {
if (utime(SvPVx(*mark, na),&utbuf))
tot--;
}
}
else
tot = 0;
break;
#endif
}
return tot;
}
/* Do the permissions allow some operation? Assumes statcache already set. */
#ifndef VMS /* VMS' cando is in vms.c */
I32
cando(bit, effective, statbufp)
I32 bit;
I32 effective;
register struct stat *statbufp;
{
#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 (bit & statbufp->st_mode) ? TRUE : FALSE;
#else /* ! MSDOS */
if ((effective ? euid : uid) == 0) { /* root is special */
if (bit == 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 ? euid : uid) ) {
if (statbufp->st_mode & bit)
return TRUE; /* ok as "user" */
}
else if (ingroup((I32)statbufp->st_gid,effective)) {
if (statbufp->st_mode & bit >> 3)
return TRUE; /* ok as "group" */
}
else if (statbufp->st_mode & bit >> 6)
return TRUE; /* ok as "other" */
return FALSE;
#endif /* ! MSDOS */
}
#endif /* ! VMS */
I32
ingroup(testgid,effective)
I32 testgid;
I32 effective;
{
if (testgid == (effective ? egid : 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;
}
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
I32
do_ipcget(optype, mark, sp)
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:
croak("%s not implemented", op_desc[optype]);
#endif
}
return -1; /* should never happen */
}
I32
do_ipcctl(optype, mark, sp)
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:
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct semid_ds);
else if (cmd == GETALL || cmd == SETALL)
{
struct semid_ds semds;
if (semctl(id, 0, IPC_STAT, &semds) == -1)
return -1;
getinfo = (cmd == GETALL);
infosize = semds.sem_nsems * sizeof(short);
/* "short" is technically wrong but much more portable
than guessing about u_?short(_t)? */
}
break;
#endif
#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
default:
croak("%s not implemented", 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)
croak("Bad arg length for %s, is %d, should be %d",
op_desc[optype], len, infosize);
}
}
else
{
I32 i = SvIV(astr);
a = (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:
ret = semctl(id, n, cmd, (struct semid_ds *)a);
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
do_msgsnd(mark, sp)
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)
croak("Arg too short for msgsnd");
SETERRNO(0,0);
return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
#else
croak("msgsnd not implemented");
#endif
}
I32
do_msgrcv(mark, sp)
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;
msize = SvIVx(*++mark);
mtype = (long)SvIVx(*++mark);
flags = SvIVx(*++mark);
if (SvTHINKFIRST(mstr)) {
if (SvREADONLY(mstr))
croak("Can't msgrcv to readonly var");
if (SvROK(mstr))
sv_unref(mstr);
}
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';
}
return ret;
#else
croak("msgrcv not implemented");
#endif
}
I32
do_semop(mark, sp)
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$_INVARG);
return -1;
}
SETERRNO(0,0);
return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
#else
croak("semop not implemented");
#endif
}
I32
do_shmio(optype, mark, sp)
I32 optype;
SV **mark;
SV **sp;
{
#ifdef HAS_SHM
SV *mstr;
char *mbuf, *shm;
I32 id, mpos, msize;
STRLEN len;
struct shmid_ds shmds;
id = SvIVx(*++mark);
mstr = *++mark;
mpos = SvIVx(*++mark);
msize = SvIVx(*++mark);
SETERRNO(0,0);
if (shmctl(id, IPC_STAT, &shmds) == -1)
return -1;
if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
return -1;
}
shm = (Shmat_t)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) {
SvPV_force(mstr, len);
mbuf = SvGROW(mstr, msize+1);
Copy(shm + mpos, mbuf, msize, char);
SvCUR_set(mstr, msize);
*SvEND(mstr) = '\0';
SvSETMAGIC(mstr);
}
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
croak("shm I/O not implemented");
#endif
}
#endif /* SYSV IPC */
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