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|
/************************************************************/
/* */
/* Module ID - vmesa.c */
/* */
/* Function - Provide operating system dependent process- */
/* ing for perl under VM/ESA. */
/* */
/* Parameters - See individual entry points. */
/* */
/* Called By - N/A - see individual entry points. */
/* */
/* Calling To - N/A - see individual entry points. */
/* */
/* Notes - (1) ....................................... */
/* */
/* (2) ....................................... */
/* */
/* Name - Neale Ferguson. */
/* */
/* Date - August, 1998. */
/* */
/* */
/* Associated - (1) Refer To ........................... */
/* Documentation */
/* (2) Refer To ........................... */
/* */
/************************************************************/
/************************************************************/
/* */
/* MODULE MAINTENANCE HISTORY */
/* -------------------------- */
/* */
static char REQ_REL_WHO [13] =
/*-------------- -------------------------------------*/
"9999_99 NAF "; /* Original module */
/* */
/*============ End of Module Maintenance History ===========*/
/************************************************************/
/* */
/* DEFINES */
/* ------- */
/* */
/************************************************************/
#define FAIL 65280
/*=============== END OF DEFINES ===========================*/
/************************************************************/
/* */
/* INCLUDE STATEMENTS */
/* ------------------ */
/* */
/************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <spawn.h>
#include <fcntl.h>
#include <unistd.h>
#include <pthread.h>
#include <dll.h>
#include "EXTERN.h"
#include "perl.h"
#pragma map(truncate, "@@TRUNC")
/*================== End of Include Statements =============*/
/************************************************************/
/* */
/* Global Variables */
/* ---------------- */
/* */
/************************************************************/
static int Perl_stdin_fd = STDIN_FILENO,
Perl_stdout_fd = STDOUT_FILENO;
static long dl_retcode = 0;
/*================== End of Global Variables ===============*/
/************************************************************/
/* */
/* FUNCTION PROTOTYPES */
/* ------------------- */
/* */
/************************************************************/
int do_aspawn(SV *, SV **, SV **);
int do_spawn(char *, int);
static int spawnit(char *);
static pid_t spawn_cmd(char *, int, int);
struct perl_thread * getTHR(void);
/*================== End of Prototypes =====================*/
/************************************************************/
/* */
/* D O _ A S P A W N */
/* ----------------- */
/* */
/************************************************************/
int
do_aspawn(SV* really, SV **mark, SV **sp)
{
char **a,
*tmps;
struct inheritance inherit;
pid_t pid;
int status,
fd,
nFd,
fdMap[3];
SV *sv,
**p_sv;
STRLEN n_a;
status = FAIL;
if (sp > mark)
{
Newx(PL_Argv, sp - mark + 1, char*);
a = PL_Argv;
while (++mark <= sp)
{
if (*mark)
*a++ = SvPVx(*mark, n_a);
else
*a++ = "";
}
inherit.flags = SPAWN_SETGROUP;
inherit.pgroup = SPAWN_NEWPGROUP;
fdMap[STDIN_FILENO] = Perl_stdin_fd;
fdMap[STDOUT_FILENO] = Perl_stdout_fd;
fdMap[STDERR_FILENO] = STDERR_FILENO;
nFd = 3;
*a = NULL;
/*-----------------------------------------------------*/
/* Will execvp() use PATH? */
/*-----------------------------------------------------*/
if (*PL_Argv[0] != '/')
TAINT_ENV();
if (really && *(tmps = SvPV(really, n_a)))
pid = spawnp(tmps, nFd, fdMap, &inherit,
(const char **) PL_Argv,
(const char **) environ);
else
pid = spawnp(PL_Argv[0], nFd, fdMap, &inherit,
(const char **) PL_Argv,
(const char **) environ);
if (pid < 0)
{
status = FAIL;
if (ckWARN(WARN_EXEC))
warner(WARN_EXEC,"Can't exec \"%s\": %s",
PL_Argv[0],
Strerror(errno));
}
else
{
/*------------------------------------------------*/
/* If the file descriptors have been remapped then*/
/* we've been called following a my_popen request */
/* therefore we don't want to wait for spawnned */
/* program to complete. We need to set the fdpid */
/* value to the value of the spawnned process' pid*/
/*------------------------------------------------*/
fd = 0;
if (Perl_stdin_fd != STDIN_FILENO)
fd = Perl_stdin_fd;
else
if (Perl_stdout_fd != STDOUT_FILENO)
fd = Perl_stdout_fd;
if (fd != 0)
{
/*---------------------------------------------*/
/* Get the fd of the other end of the pipe, */
/* use this to reference the fdpid which will */
/* be used by my_pclose */
/*---------------------------------------------*/
close(fd);
MUTEX_LOCK(&PL_fdpid_mutex);
p_sv = av_fetch(PL_fdpid,fd,TRUE);
fd = (int) SvIVX(*p_sv);
SvREFCNT_dec(*p_sv);
*p_sv = &PL_sv_undef;
sv = *av_fetch(PL_fdpid,fd,TRUE);
MUTEX_UNLOCK(&PL_fdpid_mutex);
(void) SvUPGRADE(sv, SVt_IV);
SvIVX(sv) = pid;
status = 0;
}
else
wait4pid(pid, &status, 0);
}
do_execfree();
}
return (status);
}
/*===================== End of do_aspawn ===================*/
/************************************************************/
/* */
/* D O _ S P A W N */
/* --------------- */
/* */
/************************************************************/
int
do_spawn(char *cmd, int execf)
{
char **a,
*s,
flags[10];
int status,
nFd,
fdMap[3];
struct inheritance inherit;
pid_t pid;
while (*cmd && isSPACE(*cmd))
cmd++;
/*------------------------------------------------------*/
/* See if there are shell metacharacters in it */
/*------------------------------------------------------*/
if (*cmd == '.' && isSPACE(cmd[1]))
return (spawnit(cmd));
else
{
if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
return (spawnit(cmd));
else
{
/*------------------------------------------------*/
/* Catch VAR=val gizmo */
/*------------------------------------------------*/
for (s = cmd; *s && isALPHA(*s); s++);
if (*s != '=')
{
for (s = cmd; *s; s++)
{
if (*s != ' ' &&
!isALPHA(*s) &&
strchr("$&*(){}[]'\";\\|?<>~`\n",*s))
{
if (*s == '\n' && !s[1])
{
*s = '\0';
break;
}
return(spawnit(cmd));
}
}
}
}
}
Newx(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 = NULL;
fdMap[STDIN_FILENO] = Perl_stdin_fd;
fdMap[STDOUT_FILENO] = Perl_stdout_fd;
fdMap[STDERR_FILENO] = STDERR_FILENO;
nFd = 3;
inherit.flags = 0;
if (PL_Argv[0])
{
pid = spawnp(PL_Argv[0], nFd, fdMap, &inherit,
(const char **) PL_Argv,
(const char **) environ);
if (pid < 0)
{
status = FAIL;
if (ckWARN(WARN_EXEC))
warner(WARN_EXEC,"Can't exec \"%s\": %s",
PL_Argv[0],
Strerror(errno));
}
else
wait4pid(pid, &status, 0);
}
do_execfree();
return (status);
}
/*===================== End of do_spawn ====================*/
/************************************************************/
/* */
/* Name - spawnit. */
/* */
/* Function - Spawn command and return status. */
/* */
/* On Entry - cmd - command to be spawned. */
/* */
/* On Exit - status returned. */
/* */
/************************************************************/
int
spawnit(char *cmd)
{
pid_t pid;
int status;
pid = spawn_cmd(cmd, STDIN_FILENO, STDOUT_FILENO);
if (pid < 0)
status = FAIL;
else
wait4pid(pid, &status, 0);
return (status);
}
/*===================== End of spawnit =====================*/
/************************************************************/
/* */
/* Name - spawn_cmd. */
/* */
/* Function - Spawn command and return pid. */
/* */
/* On Entry - cmd - command to be spawned. */
/* */
/* On Exit - pid returned. */
/* */
/************************************************************/
pid_t
spawn_cmd(char *cmd, int inFd, int outFd)
{
struct inheritance inherit;
pid_t pid;
const char *argV[4] = {"/bin/sh","-c",NULL,NULL};
int nFd,
fdMap[3];
argV[2] = cmd;
fdMap[STDIN_FILENO] = inFd;
fdMap[STDOUT_FILENO] = outFd;
fdMap[STDERR_FILENO] = STDERR_FILENO;
nFd = 3;
inherit.flags = SPAWN_SETGROUP;
inherit.pgroup = SPAWN_NEWPGROUP;
pid = spawn(argV[0], nFd, fdMap, &inherit,
argV, (const char **) environ);
return (pid);
}
/*===================== End of spawnit =====================*/
/************************************************************/
/* */
/* Name - my_popen. */
/* */
/* Function - Use popen to execute a command return a */
/* file descriptor. */
/* */
/* On Entry - cmd - command to be executed. */
/* */
/* On Exit - FILE * returned. */
/* */
/************************************************************/
#include <ctest.h>
PerlIO *
my_popen(char *cmd, char *mode)
{
FILE *fd;
int pFd[2],
this,
that,
pid;
SV *sv;
if (PerlProc_pipe(pFd) >= 0)
{
this = (*mode == 'w');
that = !this;
/*-------------------------------------------------*/
/* If this is a read mode pipe */
/* - map the write end of the pipe to STDOUT */
/* - return the *FILE for the read end of the pipe */
/*-------------------------------------------------*/
if (!this)
Perl_stdout_fd = pFd[that];
/*-------------------------------------------------*/
/* Else */
/* - map the read end of the pipe to STDIN */
/* - return the *FILE for the write end of the pipe*/
/*-------------------------------------------------*/
else
Perl_stdin_fd = pFd[that];
if (strNE(cmd,"-"))
{
PERL_FLUSHALL_FOR_CHILD;
pid = spawn_cmd(cmd, Perl_stdin_fd, Perl_stdout_fd);
if (pid >= 0)
{
MUTEX_LOCK(&PL_fdpid_mutex);
sv = *av_fetch(PL_fdpid,pFd[this],TRUE);
MUTEX_UNLOCK(&PL_fdpid_mutex);
(void) SvUPGRADE(sv, SVt_IV);
SvIVX(sv) = pid;
fd = PerlIO_fdopen(pFd[this], mode);
close(pFd[that]);
}
else
fd = NULL;
}
else
{
MUTEX_LOCK(&PL_fdpid_mutex);
sv = *av_fetch(PL_fdpid,pFd[that],TRUE);
MUTEX_UNLOCK(&PL_fdpid_mutex);
(void) SvUPGRADE(sv, SVt_IV);
SvIVX(sv) = pFd[this];
fd = PerlIO_fdopen(pFd[this], mode);
}
}
else
fd = NULL;
return (fd);
}
/*===================== End of my_popen ====================*/
/************************************************************/
/* */
/* Name - my_pclose. */
/* */
/* Function - Use pclose to terminate a piped command */
/* file stream. */
/* */
/* On Entry - fd - FILE pointer. */
/* */
/* On Exit - Status returned. */
/* */
/************************************************************/
long
my_pclose(FILE *fp)
{
int pid,
saveErrno,
status;
long rc,
wRc;
SV **sv;
FILE *other;
MUTEX_LOCK(&PL_fdpid_mutex);
sv = av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
MUTEX_UNLOCK(&PL_fdpid_mutex);
pid = (int) SvIVX(*sv);
SvREFCNT_dec(*sv);
*sv = &PL_sv_undef;
rc = PerlIO_close(fp);
saveErrno = errno;
do
{
wRc = waitpid(pid, &status, 0);
} while ((wRc == -1) && (errno == EINTR));
Perl_stdin_fd = STDIN_FILENO;
Perl_stdout_fd = STDOUT_FILENO;
errno = saveErrno;
if (rc != 0)
SETERRNO(errno, garbage);
return (rc);
}
/************************************************************/
/* */
/* Name - dlopen. */
/* */
/* Function - Load a DLL. */
/* */
/* On Exit - */
/* */
/************************************************************/
void *
dlopen(const char *path)
{
dllhandle *handle;
fprintf(stderr,"Loading %s\n",path);
handle = dllload(path);
dl_retcode = errno;
fprintf(stderr,"Handle %08X %s\n",handle,strerror(errno));
return ((void *) handle);
}
/*===================== End of dlopen ======================*/
/************************************************************/
/* */
/* Name - dlsym. */
/* */
/* Function - Locate a DLL symbol. */
/* */
/* On Exit - */
/* */
/************************************************************/
void *
dlsym(void *handle, const char *symbol)
{
void *symLoc;
fprintf(stderr,"Finding %s\n",symbol);
symLoc = dllqueryvar((dllhandle *) handle, (char *) symbol);
if (symLoc == NULL)
symLoc = (void *) dllqueryfn((dllhandle *) handle,
(char *) symbol);
dl_retcode = errno;
return(symLoc);
}
/*===================== End of dlsym =======================*/
/************************************************************/
/* */
/* Name - dlerror. */
/* */
/* Function - Return the last errno pertaining to a DLL */
/* operation. */
/* */
/* On Exit - */
/* */
/************************************************************/
void *
dlerror(void)
{
char * dlEmsg;
dlEmsg = strerror(dl_retcode);
dl_retcode = 0;
return(dlEmsg);
}
/*===================== End of dlerror =====================*/
/************************************************************/
/* */
/* Name - TRUNCATE. */
/* */
/* Function - Truncate a file identified by 'path' to */
/* a given length. */
/* */
/* On Entry - path - Path of file to be truncated. */
/* length - length of truncated file. */
/* */
/* On Exit - retC - return code. */
/* */
/************************************************************/
int
truncate(const unsigned char *path, off_t length)
{
int fd,
retC;
fd = open((const char *) path, O_RDWR);
if (fd > 0)
{
retC = ftruncate(fd, length);
close(fd);
}
else
retC = fd;
return(retC);
}
/*===================== End of trunc =======================*/
|
