Annotation of OpenXM/src/kan96xx/Kan/ext.c, Revision 1.5
1.5 ! takayama 1: /* $OpenXM: OpenXM/src/kan96xx/Kan/ext.c,v 1.4 2000/03/09 12:04:52 takayama Exp $ */
1.1 maekawa 2: #include <stdio.h>
3: #include <sys/types.h>
4: #include <sys/stat.h>
5: #include <fcntl.h>
6: #include <stdlib.h>
7: #include <unistd.h>
8: #include <sys/wait.h>
9: #include "datatype.h"
10: #include "stackm.h"
11: #include "extern.h"
12: #include "extern2.h"
13: #include <signal.h>
14: #include "plugin.h"
15:
16: #define MYCP_SIZE 100
17: static int Mychildren[MYCP_SIZE];
18: static int Mycp = 0;
19: static void mywait() {
20: int status;
21: int pid;
22: int i,j;
23: signal(SIGCHLD,SIG_IGN);
24: pid = wait(&status);
25: fprintf(stderr,"Child process %d is exiting.\n",pid);
26: for (i=0; i<Mycp; i++) {
27: if (Mychildren[i] == pid) {
28: for (j=i; j<Mycp-1; j++) {
1.5 ! takayama 29: Mychildren[j] = Mychildren[j+1];
1.1 maekawa 30: }
31: if (Mycp > 0) Mycp--;
32: }
33: }
34: signal(SIGCHLD,mywait);
35: }
36:
37: #define SIZE_OF_ENVSTACK 5
38: static jmp_buf EnvStack[SIZE_OF_ENVSTACK];
39: static int Envp = 0;
40: static void pushEnv(jmp_buf jb) {
41: if (Envp < SIZE_OF_ENVSTACK) {
42: *(EnvStack[Envp]) = *jb;
43: Envp++;
44: }else{
45: fprintf(stderr,"Overflow of EnvStack.\n");
46: exit(2);
47: }
48: }
49: static void popEnv(jmp_buf jbp) {
50: if (Envp <= 0) {
51: fprintf(stderr,"Underflow of EnvStack.\n");
52: exit(3);
53: }else{
54: Envp--;
55: *jbp = *EnvStack[Envp];
56: }
57: }
58:
59: static char *ext_generateUniqueFileName(char *s)
60: {
61: char *t;
62: int i;
63: struct stat statbuf;
64: t = (char *)sGC_malloc(sizeof(char)*strlen(s)+4+2);
65: for (i=0; i<1000; i++) {
66: /* Give up if we failed for 1000 names. */
67: sprintf(t,"%s.%d",s,i);
68: /* if (phc_overwrite) return(t); */
69: if (stat(t,&statbuf) < 0) {
70: return(t);
71: }
72: }
73: errorKan1("%s\n","ext_generateUniqueFileName: could not generate a unique file name. Exhausted all the names.");
74: return(NULL);
75: }
76:
77: struct object Kextension(struct object obj)
78: {
79: char *key;
80: int size;
81: struct object keyo;
82: struct object rob = NullObject;
83: struct object obj1,obj2,obj3,obj4;
84: int m,i;
85: int argListc, fdListc;
86: char *abc;
87: char *abc2;
88: extern struct context *CurrentContextp;
89: extern jmp_buf EnvOfStackMachine;
90: extern void ctrlC();
91: extern int SigIgn;
92: extern errno;
93: extern int DebugCMO;
94: extern int OXprintMessage;
95: struct stat buf;
96: char **argv;
97: FILE *fp;
1.3 takayama 98: void (*oldsig)();
99: extern SecureMode;
1.1 maekawa 100:
101: if (obj.tag != Sarray) errorKan1("%s\n","Kextension(): The argument must be an array.");
102: size = getoaSize(obj);
103: if (size < 1) errorKan1("%s\n","Kextension(): Empty array.");
104: keyo = getoa(obj,0);
105: if (keyo.tag != Sdollar) errorKan1("%s\n","Kextension(): No key word.");
106: key = KopString(keyo);
107:
108: /* branch by they key word. */
109: if (strcmp(key,"parse")==0) {
110: if (size != 2) errorKan1("%s\n","[(parse) string] extension.");
111: obj1 = getoa(obj,1);
112: if (obj1.tag != Sdollar) errorKan1("%s\n","[(parse) string] extension");
113:
114: pushEnv(EnvOfStackMachine);
115: m = KSexecuteString(obj1.lc.str);
116: /* This is critical area. If you catch ctrl-c here, program crashes. */
117: oldsig = signal(SIGINT,SIG_IGN);
118: popEnv(EnvOfStackMachine);
119: /* OK! We passed the critical area. */
120: signal(SIGINT,oldsig);
121: rob = KpoInteger(m);
122: }else if (strcmp(key,"getpid") == 0) {
123: rob = KpoInteger( (int) getpid() );
124: }else if (strcmp(key,"flush") == 0) {
125: /* fflush(NULL); */
126: fflush(stdout);
127: rob.tag = Snull;
128: }else if (strcmp(key,"chattrs")==0) {
129: if (size != 2) errorKan1("%s\n","[(chattrs) num] extension.");
130: obj1 = getoa(obj,1);
131: if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattrs) num] extension.");
132: m = KopInteger(obj1);
133: if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT))
134: errorKan1("%s\n","The number must be 0, 1 or 2.");
135: putUserDictionary2((char *)NULL,0,0,m | SET_ATTR_FOR_ALL_WORDS,
1.5 ! takayama 136: CurrentContextp->userDictionary);
1.1 maekawa 137: }else if (strcmp(key,"keywords")==0) {
138: if (size != 1) errorKan1("%s\n","[(keywords)] extension.");
139: rob = showSystemDictionary(1);
140: /* }else if (strcmp(key,"fork0")==0) {
1.5 ! takayama 141: if (size != 2) errorKan1("%s\n","[(fork0) sss] extension.");
! 142: m = fork();
! 143: if (m>0) { rob = KpoInteger(m); }
! 144: else {
! 145: system(KopString(getoa(obj,1))); exit(0);
! 146: } */
! 147: }else if (strcmp(key,"defaultPolyRing")==0) {
! 148: if (size != 2) errorKan1("%s\n","[(defaultPolyRing) n] extension.");
! 149: rob = KdefaultPolyRing(getoa(obj,1));
! 150: }else if (strcmp(key,"getenv")==0) {
! 151: if (size != 2) errorKan1("%s\n","[(getenv) envstr] extension.");
! 152: obj1 = getoa(obj,1);
! 153: if (obj1.tag != Sdollar) errorKan1("%s\n","[(getenv) envstr] extension");
! 154: abc = getenv(KopString(obj1));
! 155: if (abc == NULL) {
! 156: rob = NullObject;
! 157: }else{
! 158: abc2 = (char *)sGC_malloc(sizeof(char)*(strlen(abc)+2));
! 159: strcpy(abc2,abc);
! 160: rob = KpoString(abc2);
! 161: }
! 162: }else if (strcmp(key,"stat")==0) {
! 163: if (size != 2) errorKan1("%s\n","[(stat) fname] extension.");
! 164: obj1 = getoa(obj,1);
! 165: if (obj1.tag != Sdollar) errorKan1("%s\n","[(stat) fname] extension ; string fname.");
! 166: m = stat(KopString(obj1),&buf);
! 167: rob = newObjectArray(2);
! 168: if (m == -1) {
! 169: /* fail */
! 170: obj2 = NullObject;
! 171: putoa(rob,0,obj2);
! 172: obj3 = newObjectArray(2);
! 173: putoa(obj3,0,KpoString("error no"));
! 174: putoa(obj3,1,KpoInteger(errno));
! 175: putoa(rob,1,obj3);
! 176: }else{
! 177: /* success */
! 178: putoa(rob,0,KpoInteger(0));
! 179: obj3 = newObjectArray(1);
! 180: putoa(obj3,0,KpoInteger((int) buf.st_size));
! 181: putoa(rob,1,obj3); /* We have not yet read buf fully */
! 182: }
! 183: }else if (strcmp(key,"forkExec")==0) {
! 184: if (size != 4) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension.");
! 185: obj1 = getoa(obj,1);
! 186: if (obj1.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array argList.");
! 187: obj2 = getoa(obj,2);
! 188: if (obj2.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array fdList.");
! 189: obj3 = getoa(obj,3);
! 190: if (obj3.tag != Sinteger) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. integer sigblock.");
! 191: m = KopInteger(obj3); /* m == 1 : block ctrl-C. */
! 192: argListc = getoaSize(obj1);
! 193: fdListc = getoaSize(obj2);
! 194: if ((m = fork()) > 0) {
! 195: /* parent */
! 196: signal(SIGCHLD,mywait); /* to kill Zombie */
! 197: Mychildren[Mycp++] = m;
! 198: if (Mycp >= MYCP_SIZE-1) {
! 199: errorKan1("%s\n","Child process table is full.\n");
! 200: Mycp = 0;
! 201: }
! 202: rob = KpoInteger(m);
! 203: /* Done */
! 204: }else{
! 205: /* Child */
! 206: for (i=0; i<fdListc; i++) {
! 207: /* close the specified files */
! 208: close(KopInteger(getoa(obj2,i)));
1.1 maekawa 209: }
1.5 ! takayama 210: /* execl */
! 211: if (m == 1) {
! 212: {
! 213: sigset_t sss;
! 214: sigemptyset(&sss);
! 215: sigaddset(&sss,SIGINT);
! 216: sigprocmask(SIG_BLOCK,&sss,NULL);
! 217: }
1.1 maekawa 218: }
1.5 ! takayama 219: argv = (char **) sGC_malloc(sizeof(char *)*(argListc+1));
! 220: if (argv == NULL) {
! 221: fprintf(stderr," no more momory. forkExec --- exiting.\n");
! 222: _exit(10);
1.1 maekawa 223: }
1.5 ! takayama 224: for (i=0; i<argListc; i++) {
! 225: argv[i] = KopString(getoa(obj1,i));
! 226: argv[i+1] = NULL;
1.1 maekawa 227: }
1.5 ! takayama 228: execv(argv[0],argv);
! 229: /* This place will never be reached unless execv fails. */
! 230: fprintf(stderr,"forkExec fails: ");
! 231: for (i=0; i<argListc; i++) {
! 232: fprintf(stderr,"%s ",argv[i]);
! 233: }
! 234: fprintf(stderr,"\nExiting, but staying as Zombie.\n");
! 235: _exit(10);
! 236: }
! 237: }else if (strcmp(key,"getchild")==0) {
! 238: if (size != 1) errorKan1("%s\n","[(getchild)] extension.");
! 239: rob = newObjectArray(Mycp);
! 240: for (i=0; i<Mycp; i++) {
! 241: putoa(rob,i,KpoInteger(Mychildren[i]));
1.1 maekawa 242: }
1.5 ! takayama 243: }else if (strcmp(key,"getUniqueFileName")==0) {
! 244: if (size != 2) errorKan1("%s\n","[(getUniqueFileName) path] extension.");
! 245: obj1 = getoa(obj,1);
! 246: if (obj1.tag != Sdollar) errorKan1("%s\n","[(getUniqueFileName) path] extension. path must be a string.");
! 247: rob = KpoString(ext_generateUniqueFileName(KopString(obj1)));
! 248: }else if (strcmp(key,"outputObjectToFile")==0) {
! 249: if (size != 3) errorKan1("%s\n","[(outputObjectToFile) path obj] extension.");
! 250: obj1 = getoa(obj,1);
! 251: if (obj1.tag != Sdollar) errorKan1("%s\n","[(outputObjectToFile) path obj] extension. path must be a string.");
! 252: obj2 = getoa(obj,2);
! 253: fp = fopen(KopString(obj1),"w");
! 254: if (fp == NULL) errorKan1("%s\n","[(outputObjectToFile) path object] extension : could not open the path.");
! 255: printObject(obj2,0,fp);
! 256: fclose(fp);
! 257: rob = NullObject;
! 258: }else if (strcmp(key,"hilbert")==0) {
! 259: if (size != 3) errorKan1("%s\n","[(hilbert) obgb obvlist] extension.");
! 260: rob = hilberto(getoa(obj,1),getoa(obj,2));
! 261: }else if (strcmp(key,"chattr")==0) {
! 262: if (size != 3) errorKan1("%s\n","[(chattr) num symbol] extension.");
! 263: obj1 = getoa(obj,1);
! 264: obj2 = getoa(obj,2);
! 265: if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattr) num symbol] extension.");
! 266: if (obj2.tag != Sstring) errorKan1("%s\n","[(chattr) num symbol] extension.");
! 267: m = KopInteger(obj1);
! 268: if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT))
! 269: errorKan1("%s\n","The number must be 0, 1 or 2.");
! 270: putUserDictionary2(obj2.lc.str,(obj2.rc.op->lc).ival,(obj2.rc.op->rc).ival,
! 271: m,CurrentContextp->userDictionary);
! 272: }
1.1 maekawa 273: #include "plugin.hh"
274: else{
275: errorKan1("%s\n","Unknown tag for extension.");
276: }
277:
278:
279: return(rob);
280: }
281:
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