File: [local] / OpenXM / src / kan96xx / Kan / ext.c (download)
Revision 1.5, Fri May 4 01:06:23 2001 UTC (23 years, 5 months ago) by takayama
Branch: MAIN
Changes since 1.4: +130 -130
lines
indent-region and untabify.
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/* $OpenXM: OpenXM/src/kan96xx/Kan/ext.c,v 1.5 2001/05/04 01:06:23 takayama Exp $ */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include "datatype.h"
#include "stackm.h"
#include "extern.h"
#include "extern2.h"
#include <signal.h>
#include "plugin.h"
#define MYCP_SIZE 100
static int Mychildren[MYCP_SIZE];
static int Mycp = 0;
static void mywait() {
int status;
int pid;
int i,j;
signal(SIGCHLD,SIG_IGN);
pid = wait(&status);
fprintf(stderr,"Child process %d is exiting.\n",pid);
for (i=0; i<Mycp; i++) {
if (Mychildren[i] == pid) {
for (j=i; j<Mycp-1; j++) {
Mychildren[j] = Mychildren[j+1];
}
if (Mycp > 0) Mycp--;
}
}
signal(SIGCHLD,mywait);
}
#define SIZE_OF_ENVSTACK 5
static jmp_buf EnvStack[SIZE_OF_ENVSTACK];
static int Envp = 0;
static void pushEnv(jmp_buf jb) {
if (Envp < SIZE_OF_ENVSTACK) {
*(EnvStack[Envp]) = *jb;
Envp++;
}else{
fprintf(stderr,"Overflow of EnvStack.\n");
exit(2);
}
}
static void popEnv(jmp_buf jbp) {
if (Envp <= 0) {
fprintf(stderr,"Underflow of EnvStack.\n");
exit(3);
}else{
Envp--;
*jbp = *EnvStack[Envp];
}
}
static char *ext_generateUniqueFileName(char *s)
{
char *t;
int i;
struct stat statbuf;
t = (char *)sGC_malloc(sizeof(char)*strlen(s)+4+2);
for (i=0; i<1000; i++) {
/* Give up if we failed for 1000 names. */
sprintf(t,"%s.%d",s,i);
/* if (phc_overwrite) return(t); */
if (stat(t,&statbuf) < 0) {
return(t);
}
}
errorKan1("%s\n","ext_generateUniqueFileName: could not generate a unique file name. Exhausted all the names.");
return(NULL);
}
struct object Kextension(struct object obj)
{
char *key;
int size;
struct object keyo;
struct object rob = NullObject;
struct object obj1,obj2,obj3,obj4;
int m,i;
int argListc, fdListc;
char *abc;
char *abc2;
extern struct context *CurrentContextp;
extern jmp_buf EnvOfStackMachine;
extern void ctrlC();
extern int SigIgn;
extern errno;
extern int DebugCMO;
extern int OXprintMessage;
struct stat buf;
char **argv;
FILE *fp;
void (*oldsig)();
extern SecureMode;
if (obj.tag != Sarray) errorKan1("%s\n","Kextension(): The argument must be an array.");
size = getoaSize(obj);
if (size < 1) errorKan1("%s\n","Kextension(): Empty array.");
keyo = getoa(obj,0);
if (keyo.tag != Sdollar) errorKan1("%s\n","Kextension(): No key word.");
key = KopString(keyo);
/* branch by they key word. */
if (strcmp(key,"parse")==0) {
if (size != 2) errorKan1("%s\n","[(parse) string] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sdollar) errorKan1("%s\n","[(parse) string] extension");
pushEnv(EnvOfStackMachine);
m = KSexecuteString(obj1.lc.str);
/* This is critical area. If you catch ctrl-c here, program crashes. */
oldsig = signal(SIGINT,SIG_IGN);
popEnv(EnvOfStackMachine);
/* OK! We passed the critical area. */
signal(SIGINT,oldsig);
rob = KpoInteger(m);
}else if (strcmp(key,"getpid") == 0) {
rob = KpoInteger( (int) getpid() );
}else if (strcmp(key,"flush") == 0) {
/* fflush(NULL); */
fflush(stdout);
rob.tag = Snull;
}else if (strcmp(key,"chattrs")==0) {
if (size != 2) errorKan1("%s\n","[(chattrs) num] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattrs) num] extension.");
m = KopInteger(obj1);
if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT))
errorKan1("%s\n","The number must be 0, 1 or 2.");
putUserDictionary2((char *)NULL,0,0,m | SET_ATTR_FOR_ALL_WORDS,
CurrentContextp->userDictionary);
}else if (strcmp(key,"keywords")==0) {
if (size != 1) errorKan1("%s\n","[(keywords)] extension.");
rob = showSystemDictionary(1);
/* }else if (strcmp(key,"fork0")==0) {
if (size != 2) errorKan1("%s\n","[(fork0) sss] extension.");
m = fork();
if (m>0) { rob = KpoInteger(m); }
else {
system(KopString(getoa(obj,1))); exit(0);
} */
}else if (strcmp(key,"defaultPolyRing")==0) {
if (size != 2) errorKan1("%s\n","[(defaultPolyRing) n] extension.");
rob = KdefaultPolyRing(getoa(obj,1));
}else if (strcmp(key,"getenv")==0) {
if (size != 2) errorKan1("%s\n","[(getenv) envstr] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sdollar) errorKan1("%s\n","[(getenv) envstr] extension");
abc = getenv(KopString(obj1));
if (abc == NULL) {
rob = NullObject;
}else{
abc2 = (char *)sGC_malloc(sizeof(char)*(strlen(abc)+2));
strcpy(abc2,abc);
rob = KpoString(abc2);
}
}else if (strcmp(key,"stat")==0) {
if (size != 2) errorKan1("%s\n","[(stat) fname] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sdollar) errorKan1("%s\n","[(stat) fname] extension ; string fname.");
m = stat(KopString(obj1),&buf);
rob = newObjectArray(2);
if (m == -1) {
/* fail */
obj2 = NullObject;
putoa(rob,0,obj2);
obj3 = newObjectArray(2);
putoa(obj3,0,KpoString("error no"));
putoa(obj3,1,KpoInteger(errno));
putoa(rob,1,obj3);
}else{
/* success */
putoa(rob,0,KpoInteger(0));
obj3 = newObjectArray(1);
putoa(obj3,0,KpoInteger((int) buf.st_size));
putoa(rob,1,obj3); /* We have not yet read buf fully */
}
}else if (strcmp(key,"forkExec")==0) {
if (size != 4) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array argList.");
obj2 = getoa(obj,2);
if (obj2.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array fdList.");
obj3 = getoa(obj,3);
if (obj3.tag != Sinteger) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. integer sigblock.");
m = KopInteger(obj3); /* m == 1 : block ctrl-C. */
argListc = getoaSize(obj1);
fdListc = getoaSize(obj2);
if ((m = fork()) > 0) {
/* parent */
signal(SIGCHLD,mywait); /* to kill Zombie */
Mychildren[Mycp++] = m;
if (Mycp >= MYCP_SIZE-1) {
errorKan1("%s\n","Child process table is full.\n");
Mycp = 0;
}
rob = KpoInteger(m);
/* Done */
}else{
/* Child */
for (i=0; i<fdListc; i++) {
/* close the specified files */
close(KopInteger(getoa(obj2,i)));
}
/* execl */
if (m == 1) {
{
sigset_t sss;
sigemptyset(&sss);
sigaddset(&sss,SIGINT);
sigprocmask(SIG_BLOCK,&sss,NULL);
}
}
argv = (char **) sGC_malloc(sizeof(char *)*(argListc+1));
if (argv == NULL) {
fprintf(stderr," no more momory. forkExec --- exiting.\n");
_exit(10);
}
for (i=0; i<argListc; i++) {
argv[i] = KopString(getoa(obj1,i));
argv[i+1] = NULL;
}
execv(argv[0],argv);
/* This place will never be reached unless execv fails. */
fprintf(stderr,"forkExec fails: ");
for (i=0; i<argListc; i++) {
fprintf(stderr,"%s ",argv[i]);
}
fprintf(stderr,"\nExiting, but staying as Zombie.\n");
_exit(10);
}
}else if (strcmp(key,"getchild")==0) {
if (size != 1) errorKan1("%s\n","[(getchild)] extension.");
rob = newObjectArray(Mycp);
for (i=0; i<Mycp; i++) {
putoa(rob,i,KpoInteger(Mychildren[i]));
}
}else if (strcmp(key,"getUniqueFileName")==0) {
if (size != 2) errorKan1("%s\n","[(getUniqueFileName) path] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sdollar) errorKan1("%s\n","[(getUniqueFileName) path] extension. path must be a string.");
rob = KpoString(ext_generateUniqueFileName(KopString(obj1)));
}else if (strcmp(key,"outputObjectToFile")==0) {
if (size != 3) errorKan1("%s\n","[(outputObjectToFile) path obj] extension.");
obj1 = getoa(obj,1);
if (obj1.tag != Sdollar) errorKan1("%s\n","[(outputObjectToFile) path obj] extension. path must be a string.");
obj2 = getoa(obj,2);
fp = fopen(KopString(obj1),"w");
if (fp == NULL) errorKan1("%s\n","[(outputObjectToFile) path object] extension : could not open the path.");
printObject(obj2,0,fp);
fclose(fp);
rob = NullObject;
}else if (strcmp(key,"hilbert")==0) {
if (size != 3) errorKan1("%s\n","[(hilbert) obgb obvlist] extension.");
rob = hilberto(getoa(obj,1),getoa(obj,2));
}else if (strcmp(key,"chattr")==0) {
if (size != 3) errorKan1("%s\n","[(chattr) num symbol] extension.");
obj1 = getoa(obj,1);
obj2 = getoa(obj,2);
if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattr) num symbol] extension.");
if (obj2.tag != Sstring) errorKan1("%s\n","[(chattr) num symbol] extension.");
m = KopInteger(obj1);
if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT))
errorKan1("%s\n","The number must be 0, 1 or 2.");
putUserDictionary2(obj2.lc.str,(obj2.rc.op->lc).ival,(obj2.rc.op->rc).ival,
m,CurrentContextp->userDictionary);
}
#include "plugin.hh"
else{
errorKan1("%s\n","Unknown tag for extension.");
}
return(rob);
}