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SGI Freeware 2002 November
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SGI Freeware 2002 November - Disc 2.iso
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fw_glimpse.idb
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usr
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freeware
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src
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glimpse-3.0
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communicate.c.z
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communicate.c
Wrap
C/C++ Source or Header
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1997-09-09
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9KB
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437 lines
/* rewritten so that it uses no library routines */
#if SFS_COMPAT
#if defined(__NeXT__)
#include <syscall.h>
#else
#include <sys/syscall.h>
#endif
#endif
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
/* #include <sys/uio.h> */
/* #include <sgtty.h> */
#include <signal.h>
#if 1
#if defined(_IBMR2)
#include <sys/select.h>
#endif
#else
#if defined(HAVE_SYS_SELECT_H)
#include <sys/select.h>
#endif
#endif
#include "glimpse.h"
#include "defs.h"
int
mystrlen(str, max)
char *str;
int max;
{
int i=0;
while ((i<max) && (str[i] != '\0')) i++;
return i;
}
int
readn(fd, ptr, nbytes)
int fd;
char *ptr;
int nbytes;
{
int nleft, nread;
nleft = nbytes;
while (nleft > 0) {
#if SFS_COMPAT
nread = syscall(SYS_read, fd, ptr, nleft);
#else
nread = read(fd, ptr, nleft);
#endif
if (nread < 0) return(nread);
else if (nread == 0) break; /* EOF */
nleft -= nread;
ptr += nread;
}
return (nbytes - nleft);
}
int
writen(fd, ptr, nbytes)
int fd;
char *ptr;
int nbytes;
{
int nleft, nwritten;
nleft = nbytes;
while (nleft > 0) {
#if SFS_COMPAT
nwritten = syscall(SYS_write, fd, ptr, nleft);
#else
nwritten = write(fd, ptr, nleft);
#endif
if (nwritten <= 0) return nwritten;
nleft -= nwritten;
ptr += nwritten;
}
return (nbytes - nleft);
}
int
readline(sockfd, ptr, maxlen)
int sockfd;
char *ptr;
int maxlen;
{
int n, rc;
char c;
for (n=1; n<maxlen; n++) {
if ((rc = readn(sockfd, &c, 1)) == 1) {
*ptr++ = c;
if (c == '\n') break;
} else if (rc == 0) {
if (n==1) return (0); /* EOF */
else break;
} else return (-1);
}
*ptr = 0;
return n;
}
#if USE_MSGHDR
/*
* This piece of code was causing compilation problems.
* It was not being used anyway. So it has been deleted.
* -bg, Jan 4th 95
*/
int
sendfile(sockfd, fds, num)
int sockfd, fds[], num;
{
struct iovec iov[1];
struct msghdr msg;
int ret;
iov[0].iov_base = (char *) NULL;
iov[0].iov_len = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = (caddr_t) NULL;
msg.msg_namelen = 0;
msg.msg_accrights = (caddr_t) fds;
msg.msg_accrightslen = num * sizeof(int);
errno = 0;
#if SFS_COMPAT
if ((ret = syscall(SYS_sendmsg, sockfd, &msg, 0)) < 0) {
#else
if ((ret = sendmsg(sockfd, &msg, 0)) < 0) {
#endif
#if 0
printf("sendmsg ret = %x, errno = %d\n", ret, errno);
#endif
return (-1);
}
#if 0
printf("sent fds %x %x %x, ret = %x, errno = %d\n", fds[0], fds[1], fds[2], ret, errno);
#endif
return (0);
}
int
send_clfds(sockfd, clstdin, clstdout, clstderr)
int sockfd, clstdin, clstdout, clstderr;
{
int fds[3];
fds[0] = clstdin;
fds[1] = clstdout;
fds[2] = clstderr;
if (sendfile(sockfd, fds, 3) < 0) return -1;
return 0;
}
int
getfile(sockfd, fds, num)
int sockfd, fds[], num;
{
struct iovec iov[1];
struct msghdr msg;
int ret;
iov[0].iov_base = (char *) NULL;
iov[0].iov_len = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = (caddr_t) NULL;
msg.msg_namelen = 0;
msg.msg_accrights = (caddr_t)fds;
msg.msg_accrightslen = num*sizeof(int);
errno = 0;
#if SFS_COMPAT
if ((ret = syscall(SYS_recvmsg, sockfd, &msg, 0)) < 0) {
#else
if ((ret = recvmsg(sockfd, &msg, 0)) < 0) {
#endif
#if 0
printf("bad recvmsg: ret = %x, errno = %d\n", ret, errno);
#endif
return -1;
}
#if 0
printf("got fds %x %x %x, ret = %x, errno = %d\n", fds[0], fds[1], fds[2], ret, errno);
#endif
return 0;
}
int
get_clfds(sockfd, pclstdin, pclstdout, pclstderr)
int sockfd, *pclstdin, *pclstdout, *pclstderr;
{
int fds[3];
if (getfile(sockfd, fds, 3) < 0) return -1;
if (((*pclstdin = fds[0]) < 0) || (*pclstdin >= 20)) return -1;
if (((*pclstdout = fds[1]) < 0) || (*pclstdout >= 20)) return -1;
if (((*pclstderr = fds[2]) < 0) || (*pclstderr >= 20)) return -1;
return 0;
}
#endif /*USE_MSGHDR*/
int
linearize(sockfd, reqbuf, reqlen, argc, argv, pid)
int sockfd;
int reqlen, argc;
char *reqbuf, *argv[];
int pid;
{
int i;
unsigned char array[4];
int ptr = 0;
int len;
array[0] = (pid & 0xff000000) >> 24;
array[1] = (pid & 0xff0000) >> 16;
array[2] = (pid & 0xff00) >> 8;
array[3] = (pid & 0xff);
if (sockfd >= 0) {
if (writen(sockfd, array, 4) < 4) return -1;
}
if (reqbuf != NULL) {
if (ptr + 4 >= reqlen) return -1;
memcpy(reqbuf+ptr, array, 4);
ptr += 4;
}
array[0] = (argc & 0xff000000) >> 24;
array[1] = (argc & 0xff0000) >> 16;
array[2] = (argc & 0xff00) >> 8;
array[3] = (argc & 0xff);
if (sockfd >= 0) {
if (writen(sockfd, array, 4) < 4) return -1;
}
if (reqbuf != NULL) {
if (ptr + 4 >= reqlen) return -1;
memcpy(reqbuf+ptr, array, 4);
ptr += 4;
}
for (i=0; i<argc; i++) {
len = strlen(argv[i]);
if (sockfd >= 0) {
if (writen(sockfd, argv[i], len + 1) < len + 1) return -1;
if (writen(sockfd, "\n", 1) < 1) return -1; /* so that we can do gets */
}
if (reqbuf != NULL) {
if (ptr + len + 2 >= reqlen) return -1;
strcpy(reqbuf+ptr, argv[i]);
ptr += len+1;
reqbuf[ptr++] = '\0'; /* so that we can do strcpy */
}
#if 0
printf("sending %s\n", argv[i]);
#endif
}
return ptr;
}
int
delinearize(sockfd, reqbuf, reqlen, pargc, pargv, ppid)
int sockfd;
int reqlen, *pargc;
char *reqbuf, **pargv[];
int *ppid;
{
int i;
char line[MAXLINE];
int len;
int ptr = 0;
unsigned char array[4];
*ppid = 0;
*pargc = 0;
*pargv = NULL;
memset(array, '\0', 4);
if (sockfd >= 0) if (readn(sockfd, array, 4) != 4) return -1;
if (reqbuf != NULL) {
if (ptr+4 >= reqlen) return -1;
memcpy(array, reqbuf+ptr, 4);
ptr += 4;
}
*ppid = (array[0] << 24) + (array[1] << 16) + (array[2] << 8) + array[3];
memset(array, '\0', 4);
if (sockfd >= 0) if (readn(sockfd, array, 4) != 4) return -1;
if (reqbuf != NULL) {
if (ptr+4 >= reqlen) return -1;
memcpy(array, reqbuf+ptr, 4);
ptr += 4;
}
*pargc = (array[0] << 24) + (array[1] << 16) + (array[2] << 8) + array[3];
#if 0
printf("clargc=%x\n", *pargc);
#endif
/* VERY important, set hard-coded limit to MAX_ARGS*MAX_NAME_LEN; otherwise can cause the server to allocate TONS of memory */
if (*pargc <= 0 || *pargc >= (MAX_ARGS*MAX_NAME_LEN)) { *pargc = 0; return -1; }
if ((*pargv = (char **)malloc(sizeof(char *) * *pargc)) == NULL) {
/* no memory, so discard */
*pargc = 0;
return - 1;
}
memset(*pargv, '\0', sizeof(char *) * *pargc);
for (i=0; i<*pargc; i++) {
if (sockfd >= 0) {
if (readline(sockfd, line, MAXLINE) <= 0) return -1;
if ((len = mystrlen(line, MAXLINE)) <= 0) {
i--;
continue;
}
if (((*pargv)[i] = (char *)malloc(len + 2)) == NULL) return -1;
line[len] = '\0'; /* overwrite the '\n' */
strcpy((*pargv)[i], line);
}
if (reqbuf != NULL) {
if ( ((len = mystrlen(reqbuf+ptr, reqlen-ptr)) <= 0) || (len >= MAXLINE) ) return -1;
if (((*pargv)[i] = (char *)malloc(len + 2)) == NULL) return -1;
strcpy((*pargv)[i], reqbuf+ptr);
ptr += len + 2;
}
#if 0
printf("clargv[%x]=%s\n", i, (*pargv)[i]);
#endif
}
return ptr;
}
int
sendreq(sockfd, reqbuf, clstdin, clstdout, clstderr, clargc, clargv, clpid)
int sockfd, clstdin, clstdout, clstderr, clargc, clpid;
char reqbuf[MAX_ARGS*MAX_NAME_LEN], *clargv[];
{
#if USE_MSGHDR
struct iovec iov[1];
struct msghdr msg;
int ret;
int fds[3];
#endif /*USE_MSGHDR*/
#if USE_MSGHDR
if ((ret = linearize(-1, reqbuf, MAX_ARGS*MAX_NAME_LEN, clargc, clargv, clpid)) < 0) return -1;
fds[2] = clstdin;
fds[1] = clstdout;
fds[0] = clstderr;
iov[0].iov_base = (char *) reqbuf;
iov[0].iov_len = ret;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = (caddr_t) NULL;
msg.msg_namelen = 0;
msg.msg_accrights = (caddr_t) fds;
msg.msg_accrightslen = 2 * sizeof(int); /* don't send clstdin */
errno = 0;
#if SFS_COMPAT
if ((ret = syscall(SYS_sendmsg, sockfd, &msg, 0)) < 0) {
#else
if ((ret = sendmsg(sockfd, &msg, 0)) < 0) {
#endif
#if 0
printf("sendmsg ret = %x, errno = %d\n", ret, errno);
#endif
return (-1);
}
#if 0
printf("sendreq %x %x %x, ret = %x, errno = %d\n", fds[0], fds[1], fds[2], ret, errno);
#endif
#else /*USE_MSGHDR*/
if (linearize(sockfd, (char *)NULL, MAX_ARGS*MAX_NAME_LEN, clargc, clargv, clpid) < 0) return -1;
#endif /*USE_MSGHDR*/
return (0);
}
int
getreq(sockfd, reqbuf, pclstdin, pclstdout, pclstderr, pclargc, pclargv, pclpid)
int sockfd, *pclstdin, *pclstdout, *pclstderr, *pclargc, *pclpid;
char reqbuf[MAX_ARGS*MAX_NAME_LEN], **pclargv[];
{
#if USE_MSGHDR
struct iovec iov[1];
struct msghdr msg;
int ret;
int fds[3];
#endif /*USE_MSGHDR*/
#if USE_MSGHDR
iov[0].iov_base = (char *) reqbuf;
iov[0].iov_len = MAX_ARGS * MAX_NAME_LEN;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = (caddr_t) NULL;
msg.msg_namelen = 0;
msg.msg_accrights = (caddr_t)fds;
msg.msg_accrightslen = 2*sizeof(int);
errno = 0;
#if SFS_COMPAT
if ((ret = syscall(SYS_recvmsg, sockfd, &msg, 0)) < 0) {
#else
if ((ret = recvmsg(sockfd, &msg, 0)) < 0) {
#endif
#if 0
printf("bad recvmsg: ret = %x, errno = %d\n", ret, errno);
#endif
return -1;
}
*pclstdin = fds[2];
*pclstdout = fds[1];
*pclstderr = fds[0];
if ((ret == delinearize(-1, reqbuf, MAX_ARGS * MAX_NAME_LEN, pclargc, pclargv, pclpid)) < 0) return -1;
#if 0
printf("getreq %x %x %x, ret = %x, errno = %d\n", fds[0], fds[1], fds[2], ret, errno);
#endif
#else /*USE_MSGHDR*/
if (delinearize(sockfd, (char *)NULL, MAX_ARGS * MAX_NAME_LEN, pclargc, pclargv, pclpid) < 0) return -1;
*pclstdin = -1;
*pclstdout = sockfd;
*pclstderr = sockfd;
#endif /*USE_MSGHDR*/
return (0);
}