This is togeomview.c in view mode; [Download] [Up]
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/signal.h>
#include <sys/file.h>
#include <sys/fcntl.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#ifndef O_NONBLOCK
# define O_NONBLOCK O_NDELAY
#endif
#ifndef FNONBLK
# define FNONBLK FNDELAY
#endif
extern int errno;
char *todir = "/tmp/geomview";
char *toname = "OOGL";
char *prog;
char timedout[] = "Couldn't start geomview\n";
static void
interrupt(int sig) {
write(2, timedout, sizeof(timedout));
exit(1);
}
/*
* We've determined that no copy of geomview is running, so start one.
*/
start_gv(char **progtorun, char *toname, int asgeom, int usesock)
{
char *args[1024];
int i;
static char Mprefix[] = "/tmp/geomview/";
static char Mhow[] = "-Mcp";
signal(SIGALRM, interrupt);
for(i=0; progtorun[i] != NULL; i++)
args[i] = progtorun[i];
Mhow[2] = asgeom ? 'g' : 'c';
Mhow[3] = usesock ? 's' : 'p';
args[i++] = Mhow;
args[i++] = strncmp(toname, Mprefix, strlen(Mprefix))
? toname : toname + strlen(Mprefix);
if(fork() == 0) {
close(0);
setpgrp(0,getpid());
execvp(progtorun[0], args);
execvp("gv", args);
perror("Couldn't exec geomview nor gv");
kill(getppid(), SIGALRM);
_exit(1);
}
}
/*
* Pipe fitting for linking Mathematica to geomview.
* Starts geomview if not already running.
*/
main(int argc, char *argv[])
{
int usesock;
int n, fd = -1;
int asgeom = 0;
char pipename[BUFSIZ];
static char *geomview[] = { "geomview", NULL };
char **progtorun = geomview;
char *tail;
struct sockaddr_un un;
struct stat st;
prog = argv[0];
tail = strrchr(prog, '/');
if(tail) tail++; else tail = argv[0];
if(tail[0] == 'g') { asgeom = 1; }
#ifdef NeXT
usesock = 1;
#else
usesock = 0;
#endif
while(argc > 1 && argv[1][0] == '-') {
for(tail = argv[1]; *++tail; ) {
switch(*tail) {
case 'M': asgeom = 1; break;
case 'g': asgeom = 1; break;
case 'c': asgeom = 0; break;
case 'p': usesock = 0; break;
case 's': usesock = 1; break;
default: usage();
}
}
argc--, argv++;
}
if(argc > 1) toname = argv[1];
if(argc > 2) progtorun = &argv[2];
if(toname[0] == '/') {
tail = strrchr(toname, '/');
*tail = '\0';
todir = toname;
toname = tail + 1;
}
if(access(todir, W_OK) < 0) {
mkdir(todir, 0777);
chmod(todir, 0777);
}
sprintf(pipename, "%s/%s", todir, toname);
if(stat(pipename, &st) > 0 && ((st.st_mode&S_IFMT)==S_IFSOCK) != usesock)
unlink(pipename);
if(usesock) {
strncpy(un.sun_path, pipename, sizeof(un.sun_path)-1);
un.sun_family = AF_UNIX;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(connect(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
if(errno != ECONNREFUSED && errno != ENOENT) {
fprintf(stderr, "togeomview: Can't connect to ");
perror(pipename);
exit(1);
}
start_gv(progtorun, pipename, asgeom, usesock);
for(n = 0; connect(fd, (struct sockaddr*)&un, sizeof(un)) < 0; n++) {
if(n == 15)
interrupt(0);
sleep(1);
}
}
} else {
/* Use named pipe */
#ifdef S_IFIFO
if(access(pipename, 0) < 0) {
mknod(pipename, S_IFIFO, 0);
chmod(pipename, 0666);
}
fd = open(pipename, O_WRONLY|O_NONBLOCK);
if(fd >= 0) {
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) & ~(FNDELAY|FNONBLK));
} else if(errno == ENXIO) {
start_gv(progtorun, pipename, asgeom, usesock);
alarm(60);
fd = open(pipename, O_WRONLY);
alarm(0);
}
#endif
}
if(fd < 0) {
fprintf(stderr, "Can't open pipe to geomview: ");
perror(pipename);
exit(1);
}
while((n = read(0, pipename, sizeof(pipename))) > 0) {
if(write(fd, pipename, n) < n) {
perror("Error writing to geomview");
exit(1);
}
}
exit(0);
}
usage()
{
setlinebuf(stderr);
fprintf(stderr, "Usage: %s [-g] [pipename [ geomview ... args ] ]\n\
Sends lisp-style commands or (with \"-g\") OOGL geometry data to geomview,\n\
starting a copy if none is yet running. Uses \"pipename\" as the connection\n\
name; a file by that name is created in the directory \"/tmp/geomview\".\n\
Default pipename is \"OOGL\". If \"geomview ... args\" are present,\n\
invokes that (if need be) rather than geomview itself.\n\
Examples:\n\
echo '(geometry fred < dodec.off)' | togeomview sam\n\
togeomview -g <dodec.off\n\
cat my_geomview_script | togeomview bob gv -wpos 300x300@500,500\n",
prog);
exit(1);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.