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ssiLink.h File Reference

Go to the source code of this file.

Functions

BOOLEAN ssiOpen (si_link l, short flag, leftv u)
 
BOOLEAN ssiWrite (si_link l, leftv v)
 
leftv ssiRead1 (si_link l)
 
leftv ssiRead2 (si_link l, leftv key)
 
BOOLEAN ssiClose (si_link l)
 
const char * slStatusSsi (si_link l, const char *request)
 
si_link_extension slInitSsiExtension (si_link_extension s)
 
si_link ssiCommandLink ()
 
void sig_chld_hdl (int sig)
 additional default signal handler
 
int ssiReservePort (int clients)
 
void singular_close_links ()
 
ideal ssiReadIdeal (ssiInfo *d)
 
void ssiWriteIdeal (const ssiInfo *d, int typ, const ideal I)
 
int ssiReadInt (const ssiInfo *d)
 
void ssiWriteInt (const ssiInfo *d, const int i)
 

Function Documentation

◆ sig_chld_hdl()

void sig_chld_hdl ( int sig)

additional default signal handler

some newer Linux version cannot have SIG_IGN for SIGCHLD, so use this nice routine here: SuSe 9.x reports -1 always Redhat 9.x/FC x reports sometimes -1 see also: hpux_system also needed by getrusage (timer etc.)

Parameters
[in]sig

Definition at line 2313 of file ssiLink.cc.

2314{
2315 pid_t kidpid;
2316 int status;
2317
2318#if 0
2319 loop
2320 {
2321 kidpid = si_waitpid(-1, &status, WNOHANG);
2322 if (kidpid==-1)
2323 {
2324 /* continue on interruption (EINTR): */
2325 if (errno == EINTR) continue;
2326 /* break on anything else (EINVAL or ECHILD according to manpage): */
2327 break;
2328 }
2329 else if (kidpid==0) break; /* no more children to process, so break */
2330
2331 //printf("Child %ld terminated\n", kidpid);
2333 while((hh!=NULL)&&(ssiToBeClosed_inactive))
2334 {
2335 if((hh->l!=NULL) && (hh->l->m->Open==ssiOpen))
2336 {
2337 ssiInfo *d = (ssiInfo *)hh->l->data;
2338 if(d->pid==kidpid)
2339 {
2341 {
2343 slClose(hh->l);
2345 break;
2346 }
2347 else break;
2348 }
2349 else hh=(link_list)hh->next;
2350 }
2351 else hh=(link_list)hh->next;
2352 }
2353 }
2354#endif
2355}
#define TRUE
Definition auxiliary.h:101
#define FALSE
Definition auxiliary.h:97
#define NULL
Definition omList.c:12
int * status
Definition si_signals.h:61
#define loop
Definition structs.h:71

◆ singular_close_links()

void singular_close_links ( )

Definition at line 2493 of file ssiLink.cc.

2494{
2496 while(hh!=NULL)
2497 {
2498 if ((hh->l->m!=NULL)
2499 && (hh->l->m->Open==ssiOpen)
2500 && SI_LINK_OPEN_P(hh->l)
2501 && (strcmp(hh->l->mode, "fork")==0))
2502 {
2504 ssiInfo *d = (ssiInfo *)hh->l->data;
2505 if (d->f_read!=NULL) { s_close(d->f_read);d->f_read=NULL;}
2506 if (d->f_write!=NULL) { fclose(d->f_write); d->f_write=NULL; }
2507 }
2508 hh=(link_list)hh->next;
2509 }
2511}
int s_close(s_buff &F)
Definition s_buff.cc:46

◆ slInitSsiExtension()

si_link_extension slInitSsiExtension ( si_link_extension s)

Definition at line 1871 of file ssiLink.cc.

1872{
1873 s->Open=ssiOpen;
1874 s->Close=ssiClose;
1875 s->Kill=ssiClose;
1876 s->Read=ssiRead1;
1877 s->Read2=(slRead2Proc)NULL;
1878 s->Write=ssiWrite;
1879 s->Dump=ssiDump;
1880 s->GetDump=ssiGetDump;
1881
1882 s->Status=slStatusSsi;
1883 s->SetRing=ssiSetRing;
1884 s->type="ssi";
1885 return s;
1886}
const CanonicalForm int s
Definition facAbsFact.cc:51

◆ slStatusSsi()

const char * slStatusSsi ( si_link l,
const char * request )

Definition at line 1888 of file ssiLink.cc.

1889{
1890 ssiInfo *d=(ssiInfo*)l->data;
1891 if (d==NULL) return "not open";
1892 if (((strcmp(l->mode,"fork")==0)
1893 ||(strcmp(l->mode,"tcp")==0)
1894 ||(strcmp(l->mode,"connect")==0))
1895 && (strcmp(request, "read") == 0))
1896 {
1897 if (s_isready(d->f_read)) return "ready";
1898#if defined(HAVE_POLL)
1899 pollfd pfd;
1900 loop
1901 {
1902 /* Don't block. Return socket status immediately. */
1903 pfd.fd=d->fd_read;
1904 pfd.events=POLLIN;
1905 //Print("test fd %d\n",d->fd_read);
1906 /* check with select: chars waiting: no -> not ready */
1907 switch (si_poll(&pfd,1,0))
1908 {
1909 case 0: /* not ready */ return "not ready";
1910 case -1: /*error*/ return "error";
1911 case 1: /*ready ? */ break;
1912 }
1913#else
1914 fd_set mask;
1915 struct timeval wt;
1916 if (FD_SETSIZE<=d->fd_read)
1917 {
1918 Werror("file descriptor number too high (%d)",d->fd_read);
1919 return "error";
1920 }
1921
1922 loop
1923 {
1924 /* Don't block. Return socket status immediately. */
1925 wt.tv_sec = 0;
1926 wt.tv_usec = 0;
1927
1928 FD_ZERO(&mask);
1929 FD_SET(d->fd_read, &mask);
1930 //Print("test fd %d\n",d->fd_read);
1931 /* check with select: chars waiting: no -> not ready */
1932 switch (si_select(d->fd_read+1, &mask, NULL, NULL, &wt))
1933 {
1934 case 0: /* not ready */ return "not ready";
1935 case -1: /*error*/ return "error";
1936 case 1: /*ready ? */ break;
1937 }
1938#endif
1939 /* yes: read 1 char*/
1940 /* if \n, check again with select else ungetc(c), ready*/
1941 int c=s_getc(d->f_read);
1942 //Print("try c=%d\n",c);
1943 if (c== -1) return "eof"; /* eof or error */
1944 else if (isdigit(c))
1945 { s_ungetc(c,d->f_read); return "ready"; }
1946 else if (c>' ')
1947 {
1948 Werror("unknown char in ssiLink(%d)",c);
1949 return "error";
1950 }
1951 /* else: next char */
1952 }
1953 }
1954 else if (strcmp(request, "read") == 0)
1955 {
1956 if (SI_LINK_R_OPEN_P(l) && (!s_iseof(d->f_read)) && (s_isready(d->f_read))) return "ready";
1957 else return "not ready";
1958 }
1959 else if (strcmp(request, "write") == 0)
1960 {
1961 if (SI_LINK_W_OPEN_P(l)) return "ready";
1962 else return "not ready";
1963 }
1964 else return "unknown status request";
1965}
int l
Definition cfEzgcd.cc:100
void Werror(const char *fmt,...)
Definition reporter.cc:189
int s_getc(s_buff F)
Definition s_buff.cc:59
int s_isready(s_buff F)
Definition s_buff.cc:86
int s_iseof(s_buff F)
Definition s_buff.cc:255
void s_ungetc(int c, s_buff F)
Definition s_buff.cc:100

◆ ssiClose()

BOOLEAN ssiClose ( si_link l)

Definition at line 1431 of file ssiLink.cc.

1432{
1433 if (l!=NULL)
1434 {
1436 ssiInfo *d = (ssiInfo *)l->data;
1437 if (d!=NULL)
1438 {
1439 // send quit signal
1440 if ((d->send_quit_at_exit)
1441 && (d->quit_sent==0))
1442 {
1443 fputs("99\n",d->f_write);
1444 fflush(d->f_write);
1445 d->quit_sent=1;
1446 }
1447 // clean ring
1448 if (d->r!=NULL) rKill(d->r);
1449 for(int i=0;i<SI_RING_CACHE;i++)
1450 {
1451 if (d->rings[i]!=NULL) rKill(d->rings[i]);
1452 d->rings[i]=NULL;
1453 }
1454 if (d->f_read!=NULL) { s_close(d->f_read);d->f_read=NULL;}
1455 if (d->f_write!=NULL) { fclose(d->f_write); d->f_write=NULL; }
1456 if (((strcmp(l->mode,"tcp")==0)
1457 || (strcmp(l->mode,"fork")==0))
1458 && (d->pid>1))
1459 {
1460 // did the child stop ?
1461 int pid=si_waitpid(d->pid,NULL,WNOHANG);
1462 if ((pid==0) /* no status change for child*/
1463 && (kill(d->pid,0)==0)) // child is still running
1464 {
1465 struct timespec t;
1466 struct timespec rem;
1467 // wait 60 sec
1468 for(int i=0;i<50;i++)
1469 {
1470 // wait till signal or 100ms:
1471 t.tv_sec=0;
1472 t.tv_nsec=100000000; // <=100 ms
1473 nanosleep(&t, &rem);
1474 // child finished ?
1475 if (si_waitpid(d->pid,NULL,WNOHANG) == d->pid) break;
1476 }
1477 if (kill(d->pid,0)==0) // child still exists
1478 {
1479 kill(d->pid,SIGTERM);
1480 t.tv_sec=1;
1481 t.tv_nsec=0; // <=1000 ms
1482 nanosleep(&t, &rem);
1483 si_waitpid(d->pid,NULL,WNOHANG);
1484 }
1485 }
1486 }
1487 if ((strcmp(l->mode,"tcp")==0)
1488 || (strcmp(l->mode,"fork")==0))
1489 {
1491 if (hh!=NULL)
1492 {
1493 if (hh->l==l)
1494 {
1496 omFreeSize(hh,sizeof(link_struct));
1497 }
1498 else while(hh->next!=NULL)
1499 {
1500 link_list hhh=(link_list)hh->next;
1501 if (hhh->l==l)
1502 {
1503 hh->next=hhh->next;
1504 omFreeSize(hhh,sizeof(link_struct));
1505 break;
1506 }
1507 else
1508 hh=(link_list)hh->next;
1509 }
1510 }
1511 }
1512 omFreeSize((ADDRESS)d,(sizeof *d));
1513 }
1514 l->data=NULL;
1515 }
1516 return FALSE;
1517}
void * ADDRESS
Definition auxiliary.h:120
int i
Definition cfEzgcd.cc:132
void rKill(ring r)
Definition ipshell.cc:6174
void rem(unsigned long *a, unsigned long *q, unsigned long p, int &dega, int degq)
Definition minpoly.cc:572
#define omFreeSize(addr, size)
#define SI_RING_CACHE
Definition s_buff.h:30

◆ ssiCommandLink()

si_link ssiCommandLink ( )

Definition at line 2242 of file ssiLink.cc.

2243{
2244 if (ssiReserved_P==0)
2245 {
2246 WerrorS("ERROR no reserved port requested");
2247 return NULL;
2248 }
2249 struct sockaddr_in cli_addr;
2250 int clilen = sizeof(cli_addr);
2251 int newsockfd = si_accept(ssiReserved_sockfd, (struct sockaddr *) &cli_addr, (socklen_t *)&clilen);
2252 if(newsockfd < 0)
2253 {
2254 Werror("ERROR on accept (errno=%d)",errno);
2255 return NULL;
2256 }
2258 si_link_extension s = si_link_root;
2259 si_link_extension prev = s;
2260 while (strcmp(s->type, "ssi") != 0)
2261 {
2262 if (s->next == NULL)
2263 {
2264 prev = s;
2265 s = NULL;
2266 break;
2267 }
2268 else
2269 {
2270 s = s->next;
2271 }
2272 }
2273 if (s != NULL)
2274 l->m = s;
2275 else
2276 {
2277 si_link_extension ns = (si_link_extension)omAlloc0Bin(s_si_link_extension_bin);
2278 prev->next=slInitSsiExtension(ns);
2279 l->m = prev->next;
2280 }
2281 l->name=omStrDup("");
2282 l->mode=omStrDup("tcp");
2283 l->ref=1;
2284 ssiInfo *d=(ssiInfo*)omAlloc0(sizeof(ssiInfo));
2285 l->data=d;
2286 d->fd_read = newsockfd;
2287 d->fd_write = newsockfd;
2288 d->f_read = s_open(newsockfd);
2289 d->f_write = fdopen(newsockfd, "w");
2292 if (ssiReserved_Clients<=0)
2293 {
2294 ssiReserved_P=0;
2295 si_close(ssiReserved_sockfd);
2296 }
2297 return l;
2298}
void WerrorS(const char *s)
Definition feFopen.cc:24
#define omStrDup(s)
#define omAlloc0Bin(bin)
#define omAlloc0(size)
s_buff s_open(int fd)
Definition s_buff.cc:32
int fd_write
Definition s_buff.h:26
s_buff f_read
Definition s_buff.h:22
FILE * f_write
Definition s_buff.h:23
int fd_read
Definition s_buff.h:26

◆ ssiOpen()

BOOLEAN ssiOpen ( si_link l,
short flag,
leftv u )

Definition at line 999 of file ssiLink.cc.

1000{
1001 if (l!=NULL)
1002 {
1003 const char *mode;
1004 ssiInfo *d=(ssiInfo*)omAlloc0(sizeof(ssiInfo));
1005 if (flag & SI_LINK_OPEN)
1006 {
1007 if (l->mode[0] != '\0' && (strcmp(l->mode, "r") == 0))
1008 flag = SI_LINK_READ;
1009 else flag = SI_LINK_WRITE;
1010 }
1011
1012 if (flag == SI_LINK_READ) mode = "r";
1013 else if (strcmp(l->mode, "w") == 0) mode = "w";
1014 else if (strcmp(l->mode, "fork") == 0) mode = "fork";
1015 else if (strcmp(l->mode, "tcp") == 0) mode = "tcp";
1016 else if (strcmp(l->mode, "connect") == 0) mode = "connect";
1017 else mode = "a";
1018
1019
1020 SI_LINK_SET_OPEN_P(l, flag);
1021 if(l->data!=NULL) omFreeSize(l->data,sizeof(ssiInfo));
1022 l->data=d;
1023 omFreeBinAddr(l->mode);
1024 l->mode = omStrDup(mode);
1025
1026 if (l->name[0] == '\0')
1027 {
1028 if (strcmp(mode,"fork")==0)
1029 {
1030 int pc[2];
1031 int cp[2];
1032 int err1=pipe(pc);
1033 int err2=pipe(cp);
1034 if (err1 || err2)
1035 {
1036 Werror("pipe failed with %d\n",errno);
1037 return TRUE;
1038 }
1040 n->u=u;
1041 n->l=l;
1042 n->next=(void *)ssiToBeClosed;
1043 ssiToBeClosed=n;
1044
1045 pid_t pid = fork();
1046 if (pid == -1 && errno == EAGAIN) // RLIMIT_NPROC too low?
1047 {
1049 pid = fork();
1050 }
1051 if (pid == -1)
1052 {
1053 WerrorS("could not fork");
1054 }
1055 if (pid==0) /*fork: child*/
1056 {
1057 /* block SIGINT */
1058 sigset_t sigint;
1059 sigemptyset(&sigint);
1060 sigaddset(&sigint, SIGINT);
1061 sigprocmask(SIG_BLOCK, &sigint, NULL);
1062 si_set_signal(SIGTERM,sig_term_hdl);
1063 /* set #cpu to 1 for the child:*/
1064 feSetOptValue(FE_OPT_CPUS,1);
1065
1067 /* we know: l is the first entry in ssiToBeClosed-list */
1068 while(hh!=NULL)
1069 {
1070 SI_LINK_SET_CLOSE_P(hh->l);
1071 ssiInfo *dd=(ssiInfo*)hh->l->data;
1072 s_close(dd->f_read);
1073 fclose(dd->f_write);
1074 if (dd->r!=NULL) rKill(dd->r);
1075 omFreeSize((ADDRESS)dd,(sizeof *dd));
1076 hh->l->data=NULL;
1077 link_list nn=(link_list)hh->next;
1078 omFree(hh);
1079 hh=nn;
1080 }
1081 ssiToBeClosed->next=NULL;
1082#ifdef HAVE_SIMPLEIPC
1083 memset(sem_acquired, 0, SIPC_MAX_SEMAPHORES*sizeof(sem_acquired[0]));
1084#endif // HAVE_SIMPLEIPC
1085 si_close(pc[1]); si_close(cp[0]);
1086 d->f_write=fdopen(cp[1],"w");
1087 d->f_read=s_open(pc[0]);
1088 d->fd_read=pc[0];
1089 d->fd_write=cp[1];
1090 //d->r=currRing;
1091 //if (d->r!=NULL) d->r->ref++;
1092 l->data=d;
1093 omFreeBinAddr(l->mode);
1094 l->mode = omStrDup(mode);
1097 //myynest=0;
1099 if ((u!=NULL)&&(u->rtyp==IDHDL))
1100 {
1101 idhdl h=(idhdl)u->data;
1102 h->lev=0;
1103 }
1104 loop
1105 {
1106 if (!SI_LINK_OPEN_P(l)) m2_end(-1);
1107 if(d->f_read->is_eof) m2_end(-1);
1108 leftv h=ssiRead1(l); /*contains an exit.... */
1109 if (feErrors != NULL && *feErrors != '\0')
1110 {
1111 // handle errors:
1112 PrintS(feErrors); /* currently quite simple */
1113 *feErrors = '\0';
1114 }
1115 ssiWrite(l,h);
1116 h->CleanUp();
1118 }
1119 /* never reached*/
1120 }
1121 else if (pid>0) /*fork: parent*/
1122 {
1123 d->pid=pid;
1124 si_close(pc[0]); si_close(cp[1]);
1125 d->f_write=fdopen(pc[1],"w");
1126 d->f_read=s_open(cp[0]);
1127 d->fd_read=cp[0];
1128 d->fd_write=pc[1];
1130 d->send_quit_at_exit=1;
1131 //d->r=currRing;
1132 //if (d->r!=NULL) d->r->ref++;
1133 }
1134 else
1135 {
1136 Werror("fork failed (%d)",errno);
1137 l->data=NULL;
1138 omFree(d);
1139 return TRUE;
1140 }
1141 }
1142 // ---------------------------------------------------------------------
1143 else if (strcmp(mode,"tcp")==0)
1144 {
1145 int sockfd, newsockfd, portno, clilen;
1146 struct sockaddr_in serv_addr, cli_addr;
1147 sockfd = socket(AF_INET, SOCK_STREAM, 0);
1148 if(sockfd < 0)
1149 {
1150 WerrorS("ERROR opening socket");
1151 l->data=NULL;
1152 l->flags=0;
1153 omFree(d);
1154 return TRUE;
1155 }
1156 memset((char *) &serv_addr,0, sizeof(serv_addr));
1157 portno = 1025;
1158 serv_addr.sin_family = AF_INET;
1159 serv_addr.sin_addr.s_addr = INADDR_ANY;
1160 do
1161 {
1162 portno++;
1163 serv_addr.sin_port = htons(portno);
1164 if(portno > 50000)
1165 {
1166 WerrorS("ERROR on binding (no free port available?)");
1167 l->data=NULL;
1168 l->flags=0;
1169 omFree(d);
1170 return TRUE;
1171 }
1172 }
1173 while(bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0);
1174 Print("waiting on port %d\n", portno);mflush();
1175 listen(sockfd,1);
1176 newsockfd = si_accept(sockfd, (struct sockaddr *) &cli_addr, (socklen_t *)&clilen);
1177 if(newsockfd < 0)
1178 {
1179 WerrorS("ERROR on accept");
1180 l->data=NULL;
1181 l->flags=0;
1182 omFree(d);
1183 return TRUE;
1184 }
1185 PrintS("client accepted\n");
1186 d->fd_read = newsockfd;
1187 d->fd_write = newsockfd;
1188 d->f_read = s_open(newsockfd);
1189 d->f_write = fdopen(newsockfd, "w");
1191 si_close(sockfd);
1192 }
1193 // no ssi-Link on stdin or stdout
1194 else
1195 {
1196 Werror("invalid mode >>%s<< for ssi",mode);
1197 l->data=NULL;
1198 l->flags=0;
1199 omFree(d);
1200 return TRUE;
1201 }
1202 }
1203 // =========================================================================
1204 else /*now l->name!=NULL*/
1205 {
1206 // tcp mode
1207 if(strcmp(mode,"tcp")==0)
1208 {
1209 int sockfd, newsockfd, portno, clilen;
1210 struct sockaddr_in serv_addr, cli_addr;
1211 sockfd = socket(AF_INET, SOCK_STREAM, 0);
1212 if(sockfd < 0)
1213 {
1214 WerrorS("ERROR opening socket");
1215 l->data=NULL;
1216 l->flags=0;
1217 omFree(d);
1218 return TRUE;
1219 }
1220 memset((char *) &serv_addr,0, sizeof(serv_addr));
1221 portno = 1025;
1222 serv_addr.sin_family = AF_INET;
1223 serv_addr.sin_addr.s_addr = INADDR_ANY;
1224 do
1225 {
1226 portno++;
1227 serv_addr.sin_port = htons(portno);
1228 if(portno > 50000)
1229 {
1230 WerrorS("ERROR on binding (no free port available?)");
1231 l->data=NULL;
1232 l->flags=0;
1233 return TRUE;
1234 }
1235 }
1236 while(bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0);
1237 //Print("waiting on port %d\n", portno);mflush();
1238 listen(sockfd,1);
1239 char* cli_host = (char*)omAlloc(256);
1240 char* path = (char*)omAlloc(1024);
1241 int r = si_sscanf(l->name,"%255[^:]:%s",cli_host,path);
1242 if(r == 0)
1243 {
1244 WerrorS("ERROR: no host specified");
1245 l->data=NULL;
1246 l->flags=0;
1247 omFree(d);
1248 omFree(path);
1249 omFree(cli_host);
1250 return TRUE;
1251 }
1252 else if(r == 1)
1253 {
1254 WarnS("program not specified, using /usr/local/bin/Singular");
1255 Warn("in line >>%s<<",my_yylinebuf);
1256 strcpy(path,"/usr/local/bin/Singular");
1257 }
1258 char* ssh_command = (char*)omAlloc(256);
1259 char* ser_host = (char*)omAlloc(64);
1260 if(strcmp(cli_host,"localhost")==0)
1261 strcpy(ser_host,"localhost");
1262 else
1263 gethostname(ser_host,64);
1264 if (strcmp(cli_host,"localhost")==0) /*avoid "ssh localhost" as key may change*/
1265 snprintf(ssh_command,256,"%s -q --batch --link=ssi --MPhost=%s --MPport=%d &",path,ser_host,portno);
1266 else
1267 snprintf(ssh_command,256,"ssh %s %s -q --batch --link=ssi --MPhost=%s --MPport=%d &",cli_host,path,ser_host,portno);
1268 //Print("client on %s started:%s\n",cli_host,path);
1269 omFree(path);
1270 omFree(cli_host);
1271 if (TEST_OPT_PROT) { Print("running >>%s<<\n",ssh_command); }
1272 int re=system(ssh_command);
1273 if (re<0)
1274 {
1275 Werror("ERROR running `%s` (%d)",ssh_command,re);
1276 l->data=NULL;
1277 l->flags=0;
1278 omFree(d);
1279 return TRUE;
1280 }
1281 omFree(ssh_command);
1282 omFree(ser_host);
1283 clilen = sizeof(cli_addr);
1284 newsockfd = si_accept(sockfd, (struct sockaddr *) &cli_addr, (socklen_t *)&clilen);
1285 if(newsockfd < 0)
1286 {
1287 WerrorS("ERROR on accept");
1288 l->data=NULL;
1289 l->flags=0;
1290 omFree(d);
1291 return TRUE;
1292 }
1293 //PrintS("client accepted\n");
1294 d->fd_read = newsockfd;
1295 d->fd_write = newsockfd;
1296 d->f_read = s_open(newsockfd);
1297 d->f_write = fdopen(newsockfd, "w");
1298 si_close(sockfd);
1300 d->send_quit_at_exit=1;
1301 link_list newlink=(link_list)omAlloc(sizeof(link_struct));
1302 newlink->u=u;
1303 newlink->l=l;
1304 newlink->next=(void *)ssiToBeClosed;
1305 ssiToBeClosed=newlink;
1306 fprintf(d->f_write,"98 %d %d %u %u\n",SSI_VERSION,MAX_TOK,si_opt_1,si_opt_2);
1307 }
1308 // ----------------------------------------------------------------------
1309 else if(strcmp(mode,"connect")==0)
1310 {
1311 char* host = (char*)omAlloc(256);
1312 int sockfd, portno;
1313 struct sockaddr_in serv_addr;
1314 struct hostent *server;
1315
1316 si_sscanf(l->name,"%255[^:]:%d",host,&portno);
1317 //Print("connect to host %s, port %d\n",host,portno);mflush();
1318 if (portno!=0)
1319 {
1320 sockfd = socket(AF_INET, SOCK_STREAM, 0);
1321 if (sockfd < 0)
1322 {
1323 WerrorS("ERROR opening socket");
1324 l->flags=0;
1325 return TRUE;
1326 }
1327 server = gethostbyname(host);
1328 if (server == NULL)
1329 {
1330 WerrorS("ERROR, no such host");
1331 l->flags=0;
1332 return TRUE;
1333 }
1334 memset((char *) &serv_addr, 0, sizeof(serv_addr));
1335 serv_addr.sin_family = AF_INET;
1336 memcpy((char *)&serv_addr.sin_addr.s_addr,
1337 (char *)server->h_addr,
1338 server->h_length);
1339 serv_addr.sin_port = htons(portno);
1340 if (si_connect(sockfd,(sockaddr*)&serv_addr,sizeof(serv_addr)) < 0)
1341 {
1342 Werror("ERROR connecting(errno=%d)",errno);
1343 l->flags=0;
1344 return TRUE;
1345 }
1346 //PrintS("connected\n");mflush();
1347 d->f_read=s_open(sockfd);
1348 d->fd_read=sockfd;
1349 d->f_write=fdopen(sockfd,"w");
1350 d->fd_write=sockfd;
1352 omFree(host);
1353 }
1354 else
1355 {
1356 l->data=NULL;
1357 l->flags=0;
1358 omFree(d);
1359 return TRUE;
1360 }
1361 }
1362 // ======================================================================
1363 else
1364 {
1365 // normal link to a file
1366 if (FE_OPT_NO_SHELL_FLAG) {WerrorS("no links allowed");return TRUE;}
1367 FILE *outfile;
1368 char *filename=l->name;
1369
1370 if(filename[0]=='>')
1371 {
1372 if (filename[1]=='>')
1373 {
1374 filename+=2;
1375 mode = "a";
1376 }
1377 else
1378 {
1379 filename++;
1380 mode="w";
1381 }
1382 }
1383 outfile=myfopen(filename,mode);
1384 if (outfile!=NULL)
1385 {
1386 if (strcmp(l->mode,"r")==0)
1387 {
1388 fclose(outfile);
1389 d->f_read=s_open_by_name(filename);
1390 }
1391 else
1392 {
1393 d->f_write = outfile;
1394 fprintf(d->f_write,"98 %d %d %u %u\n",SSI_VERSION,MAX_TOK,si_opt_1,si_opt_2);
1395 }
1396 }
1397 else
1398 {
1399 omFree(d);
1400 l->data=NULL;
1401 l->flags=0;
1402 return TRUE;
1403 }
1404 }
1405 }
1406 }
1407
1408 return FALSE;
1409}
int rtyp
Definition subexpr.h:91
void * data
Definition subexpr.h:88
VAR BOOLEAN singular_in_batchmode
Definition cntrlc.cc:62
si_hdl_typ si_set_signal(int sig, si_hdl_typ signal_handler)
meta function for binding a signal to an handler
Definition cntrlc.cc:121
void sig_term_hdl(int)
Definition cntrlc.cc:77
#define Print
Definition emacs.cc:80
#define Warn
Definition emacs.cc:77
#define WarnS
Definition emacs.cc:78
EXTERN_VAR BOOLEAN FE_OPT_NO_SHELL_FLAG
Definition extra.cc:170
FILE * myfopen(const char *path, const char *mode)
Definition feFopen.cc:167
const char * feSetOptValue(feOptIndex opt, char *optarg)
Definition feOpt.cc:154
VAR char my_yylinebuf[80]
Definition febase.cc:44
char * fe_fgets_dummy(const char *, char *, int)
Definition feread.cc:455
char *(* fe_fgets_stdin)(const char *pr, char *s, int size)
Definition feread.cc:32
EXTERN_VAR omBin sleftv_bin
Definition ipid.h:145
STATIC_VAR Poly * h
Definition janet.cc:971
void m2_end(int i)
Definition misc_ip.cc:1102
#define omAlloc(size)
#define omFree(addr)
#define omFreeBin(addr, bin)
#define omFreeBinAddr(addr)
VAR unsigned si_opt_2
Definition options.c:6
VAR unsigned si_opt_1
Definition options.c:5
#define TEST_OPT_PROT
Definition options.h:105
void PrintS(const char *s)
Definition reporter.cc:284
VAR char * feErrors
Definition reporter.cc:47
#define mflush()
Definition reporter.h:58
idrec * idhdl
Definition ring.h:22
int raise_rlimit_nproc()
Definition rlimit.c:18
s_buff s_open_by_name(const char *n)
Definition s_buff.cc:40
pid_t pid
Definition s_buff.h:25
char send_quit_at_exit
Definition s_buff.h:28
VAR int sem_acquired[SIPC_MAX_SEMAPHORES]
Definition semaphore.c:25
#define SIPC_MAX_SEMAPHORES
Definition simpleipc.h:10
sleftv * leftv
Definition structs.h:53
#define IDHDL
Definition tok.h:31
@ MAX_TOK
Definition tok.h:220

◆ ssiRead1()

leftv ssiRead1 ( si_link l)

Definition at line 1520 of file ssiLink.cc.

1521{
1522 ssiInfo *d = (ssiInfo *)l->data;
1524 int t=0;
1525 t=s_readint(d->f_read);
1526 //Print("got type %d\n",t);
1527 switch(t)
1528 {
1529 case 1:res->rtyp=INT_CMD;
1530 res->data=(char *)(long)ssiReadInt(d);
1531 //Print("int: %d\n",(int)(long)res->data);
1532 break;
1533 case 2:res->rtyp=STRING_CMD;
1534 res->data=(char *)ssiReadString(d);
1535 //Print("str: %s\n",(char*)res->data);
1536 break;
1537 case 3:res->rtyp=NUMBER_CMD;
1538 if (d->r==NULL) goto no_ring;
1539 ssiCheckCurrRing(d->r);
1540 res->data=(char *)ssiReadNumber(d);
1541 //Print("number\n");
1542 break;
1543 case 4:res->rtyp=BIGINT_CMD;
1544 res->data=(char *)ssiReadBigInt(d);
1545 //Print("bigint\n");
1546 break;
1547 case 15:
1548 case 5:{
1549 //Print("ring %d\n",t);
1550 d->r=ssiReadRing(d);
1551 if (errorreported) return NULL;
1552 res->data=(char*)d->r;
1553 if (d->r!=NULL) rIncRefCnt(d->r);
1554 res->rtyp=RING_CMD;
1555 if (t==15) // setring
1556 {
1557 if(ssiSetCurrRing(d->r)) { d->r=currRing; }
1559 return ssiRead1(l);
1560 }
1561 }
1562 break;
1563 case 6:res->rtyp=POLY_CMD;
1564 //Print("poly\n");
1565 if (d->r==NULL) goto no_ring;
1566 ssiCheckCurrRing(d->r);
1567 res->data=(char*)ssiReadPoly(d);
1568 break;
1569 case 7:res->rtyp=IDEAL_CMD;
1570 //Print("ideal\n");
1571 if (d->r==NULL) goto no_ring;
1572 ssiCheckCurrRing(d->r);
1573 res->data=(char*)ssiReadIdeal(d);
1574 break;
1575 case 8:res->rtyp=MATRIX_CMD;
1576 //Print("matrix\n");
1577 if (d->r==NULL) goto no_ring;
1578 ssiCheckCurrRing(d->r);
1579 res->data=(char*)ssiReadMatrix(d);
1580 break;
1581 case 9:res->rtyp=VECTOR_CMD;
1582 //Print("vector\n");
1583 if (d->r==NULL) goto no_ring;
1584 ssiCheckCurrRing(d->r);
1585 res->data=(char*)ssiReadPoly(d);
1586 break;
1587 case 10:
1588 case 22:if (t==22) res->rtyp=SMATRIX_CMD;
1589 else res->rtyp=MODUL_CMD;
1590 //Print("module/smatrix %d\n",t);
1591 if (d->r==NULL) goto no_ring;
1592 ssiCheckCurrRing(d->r);
1593 {
1594 int rk=s_readint(d->f_read);
1595 ideal M=ssiReadIdeal(d);
1596 M->rank=rk;
1597 res->data=(char*)M;
1598 }
1599 break;
1600 case 11:
1601 {
1602 //Print("cmd\n",t);
1603 res->rtyp=COMMAND;
1604 res->data=ssiReadCommand(l);
1605 int nok=res->Eval();
1606 if (nok) WerrorS("error in eval");
1607 break;
1608 }
1609 case 12: /*DEF_CMD*/
1610 {
1611 //Print("def\n",t);
1612 res->rtyp=0;
1613 res->name=(char *)ssiReadString(d);
1614 int nok=res->Eval();
1615 if (nok) WerrorS("error in name lookup");
1616 break;
1617 }
1618 case 13: res->rtyp=PROC_CMD;
1619 res->data=ssiReadProc(d);
1620 break;
1621 case 14: res->rtyp=LIST_CMD;
1622 res->data=ssiReadList(l);
1623 break;
1624 case 16: res->rtyp=NONE; res->data=NULL;
1625 break;
1626 case 17: res->rtyp=INTVEC_CMD;
1627 res->data=ssiReadIntvec(d);
1628 break;
1629 case 18: res->rtyp=INTMAT_CMD;
1630 res->data=ssiReadIntmat(d);
1631 break;
1632 case 19: res->rtyp=BIGINTMAT_CMD;
1633 res->data=ssiReadBigintmat(d);
1634 break;
1635 case 20: ssiReadBlackbox(res,l);
1636 break;
1637 case 21: ssiReadAttrib(res,l);
1638 break;
1639 case 23: ssiReadRingProperties(l);
1640 return ssiRead1(l);
1641 break;
1642 case 24: res->rtyp=BIGINTVEC_CMD;
1643 res->data=ssiReadBigintvec(d);
1644 break;
1645 // ------------
1646 case 98: // version
1647 {
1648 int n98_v,n98_m;
1649 BITSET n98_o1,n98_o2;
1650 n98_v=s_readint(d->f_read);
1651 n98_m=s_readint(d->f_read);
1652 n98_o1=s_readint(d->f_read);
1653 n98_o2=s_readint(d->f_read);
1654 if ((n98_v!=SSI_VERSION) ||(n98_m!=MAX_TOK))
1655 {
1656 Print("incompatible versions of ssi: %d/%d vs %d/%d\n",
1657 SSI_VERSION,MAX_TOK,n98_v,n98_m);
1658 }
1659 #ifndef SING_NDEBUG
1660 if (TEST_OPT_DEBUG)
1661 Print("// opening ssi-%d, MAX_TOK=%d\n",n98_v,n98_m);
1662 #endif
1663 si_opt_1=n98_o1;
1664 si_opt_2=n98_o2;
1666 return ssiRead1(l);
1667 }
1668 case 99: omFreeBin(res,sleftv_bin); ssiClose(l); m2_end(-1);
1669 break; /*to make compiler happy*/
1670 case 0: if (s_iseof(d->f_read))
1671 {
1672 ssiClose(l);
1673 }
1674 res->rtyp=DEF_CMD;
1675 break;
1676 default: Werror("not implemented (t:%d)",t);
1678 res=NULL;
1679 break;
1680 }
1681 // if currRing is required for the result, but lost
1682 // define "ssiRing%d" as currRing:
1683 if ((d->r!=NULL)
1684 && (currRing!=d->r)
1685 && (res->RingDependend()))
1686 {
1687 if(ssiSetCurrRing(d->r)) { d->r=currRing; }
1688 }
1689 return res;
1690no_ring: WerrorS("no ring");
1692 return NULL;
1693}
#define BITSET
Definition auxiliary.h:85
CanonicalForm res
Definition facAbsFact.cc:60
VAR short errorreported
Definition feFopen.cc:23
@ IDEAL_CMD
Definition grammar.cc:285
@ MATRIX_CMD
Definition grammar.cc:287
@ BIGINTMAT_CMD
Definition grammar.cc:278
@ PROC_CMD
Definition grammar.cc:281
@ INTMAT_CMD
Definition grammar.cc:280
@ MODUL_CMD
Definition grammar.cc:288
@ SMATRIX_CMD
Definition grammar.cc:292
@ VECTOR_CMD
Definition grammar.cc:293
@ BIGINTVEC_CMD
Definition grammar.cc:279
@ NUMBER_CMD
Definition grammar.cc:289
@ POLY_CMD
Definition grammar.cc:290
@ RING_CMD
Definition grammar.cc:282
#define TEST_OPT_DEBUG
Definition options.h:110
VAR ring currRing
Widely used global variable which specifies the current polynomial ring for Singular interpreter and ...
Definition polys.cc:13
static ring rIncRefCnt(ring r)
Definition ring.h:849
int s_readint(s_buff F)
Definition s_buff.cc:113
#define M
Definition sirandom.c:25
@ BIGINT_CMD
Definition tok.h:38
@ LIST_CMD
Definition tok.h:118
@ INTVEC_CMD
Definition tok.h:101
@ DEF_CMD
Definition tok.h:58
@ STRING_CMD
Definition tok.h:187
@ INT_CMD
Definition tok.h:96
#define NONE
Definition tok.h:223
#define COMMAND
Definition tok.h:29

◆ ssiRead2()

leftv ssiRead2 ( si_link l,
leftv key )

◆ ssiReadIdeal()

ideal ssiReadIdeal ( ssiInfo * d)

Definition at line 767 of file ssiLink.cc.

768{
769 return ssiReadIdeal_R(d,d->r);
770}
ring r
Definition s_buff.h:24

◆ ssiReadInt()

int ssiReadInt ( const ssiInfo * d)

Definition at line 503 of file ssiLink.cc.

504{
505 return s_readint(d->f_read);
506}

◆ ssiReservePort()

int ssiReservePort ( int clients)

Definition at line 2206 of file ssiLink.cc.

2207{
2208 if (ssiReserved_P!=0)
2209 {
2210 WerrorS("ERROR already a reserved port requested");
2211 return 0;
2212 }
2213 int portno;
2214 ssiReserved_sockfd = socket(AF_INET, SOCK_STREAM, 0);
2215 if(ssiReserved_sockfd < 0)
2216 {
2217 WerrorS("ERROR opening socket");
2218 return 0;
2219 }
2220 memset((char *) &ssiResverd_serv_addr,0, sizeof(ssiResverd_serv_addr));
2221 portno = 1025;
2222 ssiResverd_serv_addr.sin_family = AF_INET;
2223 ssiResverd_serv_addr.sin_addr.s_addr = INADDR_ANY;
2224 do
2225 {
2226 portno++;
2227 ssiResverd_serv_addr.sin_port = htons(portno);
2228 if(portno > 50000)
2229 {
2230 WerrorS("ERROR on binding (no free port available?)");
2231 return 0;
2232 }
2233 }
2234 while(bind(ssiReserved_sockfd, (struct sockaddr *) &ssiResverd_serv_addr, sizeof(ssiResverd_serv_addr)) < 0);
2235 ssiReserved_P=portno;
2236 listen(ssiReserved_sockfd,clients);
2237 ssiReserved_Clients=clients;
2238 return portno;
2239}

◆ ssiWrite()

BOOLEAN ssiWrite ( si_link l,
leftv v )

Definition at line 1714 of file ssiLink.cc.

1715{
1716 if(SI_LINK_W_OPEN_P(l)==0)
1718 ssiInfo *d = (ssiInfo *)l->data;
1719 d->level++;
1720 //FILE *fich=d->f;
1721 while (data!=NULL)
1722 {
1723 int tt=data->Typ();
1724 void *dd=data->Data();
1725 attr *aa=data->Attribute();
1726 if ((aa!=NULL) && ((*aa)!=NULL)) // n user attributes
1727 {
1728 attr a=*aa;
1729 int n=0;
1730 while(a!=NULL) { n++; a=a->next;}
1731 fprintf(d->f_write,"21 %d %d ",data->flag,n);
1732 }
1733 else if (data->flag!=0) // only "flag" attributes
1734 {
1735 fprintf(d->f_write,"21 %d 0 ",data->flag);
1736 }
1737 if ((dd==NULL) && (data->name!=NULL) && (tt==0)) tt=DEF_CMD;
1738 // return pure undefined names as def
1739
1740 switch(tt /*data->Typ()*/)
1741 {
1742 case 0: /*error*/
1743 case NONE/* nothing*/:fputs("16 ",d->f_write);
1744 break;
1745 case STRING_CMD: fputs("2 ",d->f_write);
1746 ssiWriteString(d,(char *)dd);
1747 break;
1748 case INT_CMD: fputs("1 ",d->f_write);
1749 ssiWriteInt(d,(int)(long)dd);
1750 break;
1751 case BIGINT_CMD:fputs("4 ",d->f_write);
1752 ssiWriteBigInt(d,(number)dd);
1753 break;
1754 case NUMBER_CMD:
1755 if (d->r!=currRing)
1756 {
1757 fputs("15 ",d->f_write);
1759 if (d->level<=1) fputc('\n',d->f_write);
1760 }
1761 fputs("3 ",d->f_write);
1762 ssiWriteNumber(d,(number)dd);
1763 break;
1764 case RING_CMD:fputs("5 ",d->f_write);
1765 ssiWriteRing(d,(ring)dd);
1766 break;
1767 case BUCKET_CMD:
1768 {
1770 if (d->r!=sBucketGetRing(b))
1771 {
1772 fputs("15 ",d->f_write);
1774 if (d->level<=1) fputc('\n',d->f_write);
1775 }
1776 fputs("6 ",d->f_write);
1777 ssiWritePoly(d,tt,sBucketPeek(b));
1778 break;
1779 }
1780 case POLY_CMD:
1781 case VECTOR_CMD:
1782 if (d->r!=currRing)
1783 {
1784 fputs("15 ",d->f_write);
1786 if (d->level<=1) fputc('\n',d->f_write);
1787 }
1788 if(tt==POLY_CMD) fputs("6 ",d->f_write);
1789 else fputs("9 ",d->f_write);
1790 ssiWritePoly(d,tt,(poly)dd);
1791 break;
1792 case IDEAL_CMD:
1793 case MODUL_CMD:
1794 case MATRIX_CMD:
1795 case SMATRIX_CMD:
1796 if (d->r!=currRing)
1797 {
1798 fputs("15 ",d->f_write);
1800 if (d->level<=1) fputc('\n',d->f_write);
1801 }
1802 if(tt==IDEAL_CMD) fputs("7 ",d->f_write);
1803 else if(tt==MATRIX_CMD) fputs("8 ",d->f_write);
1804 else /* tt==MODUL_CMD, SMATRIX_CMD*/
1805 {
1806 ideal M=(ideal)dd;
1807 if (tt==MODUL_CMD)
1808 fprintf(d->f_write,"10 %d ",(int)M->rank);
1809 else /*(tt==SMATRIX_CMD)*/
1810 fprintf(d->f_write,"22 %d ",(int)M->rank);
1811 }
1812 ssiWriteIdeal(d,tt,(ideal)dd);
1813 break;
1814 case COMMAND:
1815 fputs("11 ",d->f_write);
1817 break;
1818 case DEF_CMD: /* not evaluated stuff in quotes */
1819 fputs("12 ",d->f_write);
1820 ssiWriteString(d,data->Name());
1821 break;
1822 case PROC_CMD:
1823 fputs("13 ",d->f_write);
1824 ssiWriteProc(d,(procinfov)dd);
1825 break;
1826 case LIST_CMD:
1827 fputs("14 ",d->f_write);
1828 ssiWriteList(l,(lists)dd);
1829 break;
1830 case INTVEC_CMD:
1831 fputs("17 ",d->f_write);
1832 ssiWriteIntvec(d,(intvec *)dd);
1833 break;
1834 case INTMAT_CMD:
1835 fputs("18 ",d->f_write);
1836 ssiWriteIntmat(d,(intvec *)dd);
1837 break;
1838 case BIGINTMAT_CMD:
1839 fputs("19 ",d->f_write);
1841 break;
1842 case BIGINTVEC_CMD:
1843 fputs("24 ",d->f_write);
1845 break;
1846 default:
1847 if (tt>MAX_TOK)
1848 {
1849 blackbox *b=getBlackboxStuff(tt);
1850 fputs("20 ",d->f_write);
1851 b->blackbox_serialize(b,dd,l);
1852 }
1853 else
1854 {
1855 Werror("not implemented (t:%d, rtyp:%d)",tt, data->rtyp);
1856 d->level=0;
1857 return TRUE;
1858 }
1859 break;
1860 }
1861 if (d->level<=1) { fputc('\n',d->f_write); fflush(d->f_write); }
1862 data=data->next;
1863 }
1864 d->level--;
1865 return FALSE;
1866}
sattr * attr
Definition attrib.h:16
blackbox * getBlackboxStuff(const int t)
return the structure to the type given by t
Definition blackbox.cc:17
CanonicalForm b
Definition cfModGcd.cc:4111
Matrices of numbers.
Definition bigintmat.h:51
attr next
Definition attrib.h:26
@ BUCKET_CMD
Definition grammar.cc:284
ip_command * command
Definition ipid.h:23
slists * lists
poly sBucketPeek(sBucket_pt b)
Definition sbuckets.cc:455
ring sBucketGetRing(const sBucket_pt bucket)
Returns bucket ring.
Definition sbuckets.cc:46
sBucket * sBucket_pt
Definition sbuckets.h:16
procinfo * procinfov
Definition structs.h:56

◆ ssiWriteIdeal()

void ssiWriteIdeal ( const ssiInfo * d,
int typ,
const ideal I )

Definition at line 412 of file ssiLink.cc.

413{
414 ssiWriteIdeal_R(d,typ,I,d->r);
415}

◆ ssiWriteInt()

void ssiWriteInt ( const ssiInfo * d,
const int i )

Definition at line 154 of file ssiLink.cc.

155{
156 fprintf(d->f_write,"%d ",i);
157 //if (d->f_debug!=NULL) fprintf(d->f_debug,"int: %d ",i);
158}