Date: Tue, 04 Mar 1997 16:41:57 +0100 From: Eivind Eklund <eivind@dimaga.com> To: Adrian Chadd <adrian@obiwan.aceonline.com.au> Cc: hackers@freebsd.org, emulation@freebsd.org Subject: Re: Re : latest Java support source for FreeBSD.. Message-ID: <3.0.32.19970304164156.0092a2d0@dimaga.com>
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At 06:19 PM 3/4/97 +0800, Adrian Chadd wrote:
>
>Ok here it is.
>If people like the idea of making it a lkm, then combine it with joerg's
>lkm patch and go from there.
>
>Test it, find bugs, and tell me asap so I can go forth and fix them.. this
>might be a good addition to the 2.2-rel *grin*
>
>Also - I'll finish the appletviewer support tonight.
>
>Adrian.
>
>-- Begin /usr/sys/sys/kern/imgact_jave.c
>/*-
> * Copyright (c) 1997 Adrian Chadd
> * All rights reserved.
It would be very nice if you deleted this line, as presently you're not
even allowing me to read the code you're sending to the mailing list ;-)
(If you deleted the line, I believe you would get the effect of having the
BSD copyright for the entire file)
> *
> * Based heavily on /sys/kern/imgact_shell.c which is:
> * Copyright (c) 1993, David Greenman
> *
> * Redistribution and use in source and binary forms, with or without
> * modification, are permitted provided that the following conditions
> * are met:
> * 1. Redistributions of source code must retain the above copyright
> * notice, this list of conditions and the following disclaimer
> * in this position and unchanged.
> * 2. Redistributions in binary form must reproduce the above copyright
> * notice, this list of conditions and the following disclaimer in the
> * documentation and/or other materials provided with the distribution.
> * 3. The name of the author may not be used to endorse or promote products
> * derived from this software withough specific prior written permission
> *
> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
> * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
> * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
> * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
> * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
> * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
> * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> *
> */
>
>#include <sys/param.h>
>#include <sys/systm.h>
>#include <sys/sysproto.h>
>#include <sys/resourcevar.h>
>#include <sys/exec.h>
>#include <sys/imgact.h>
>#include <sys/kernel.h>
>#include <machine/endian.h>
>#include <sys/syslog.h>
>#include <sys/sysctl.h>
>
>
>
>/* Lets set up reasonable defaults for the system variables
>** kern.java.interpreter and kern.java.appletviewer
>*/
>
>
>static char interpreter[256] = "/usr/local/jdk/bin/i386/java";
>static char appletviewer[256] = "/usr/local/jdk/bin/i386/appletviewer";
>static char classpath[256] =
"/usr/local/jdk/classes:/usr/local/jdk/lib/classes.zip";
>
>SYSCTL_NODE(_kern, OID_AUTO, java, CTLFLAG_RW, 0, "Kernel Java support");
>
>SYSCTL_STRING(_kern_java, OID_AUTO, interpreter, CTLFLAG_RW, interpreter,
sizeof(interpreter), "Path to Java interpreter");
>SYSCTL_STRING(_kern_java, OID_AUTO, appletviewer, CTLFLAG_RW,
appletviewer, sizeof(appletviewer), "Path to Java appletviewer");
>SYSCTL_STRING(_kern_java, OID_AUTO, classpath, CTLFLAG_RW, classpath,
sizeof(classpath), "Path to Java classes");
>
>extern int exec_java_imgact __P((struct image_params *iparams));
>int dirname(const char *, char *, int);
>int basename(const char *, char *, int);
>char * strstr(const char *, const char *);
>
>
>
>/* Some utility crap */
>
>
>int dirname(const char *string, char *newstring, int maxlen)
>
>{
> char *p;
> int ch;
> char str[256];
>
> strncpy(str, string, 250);
> str[250] = '\0';
>
>
> /*
> * (1) If string is //, skip steps (2) through (5).
> * (2) If string consists entirely of slash characters, string
> * shall be set to a single slash character. In this case,
> * skip steps (3) through (8).
> */
> for (p = str;; ++p) {
> if (!*p) {
> if (p > str)
> (void)strcpy(newstring, "/");
> else
> (void)strcpy(newstring, ".");
> return(0);
> }
> if (*p != '/')
> break;
> }
>
> /*
> * (3) If there are any trailing slash characters in string, they
> * shall be removed.
> */
> for (; *p; ++p);
> while (*--p == '/')
> continue;
> *++p = '\0';
>
> /*
> * (4) If there are no slash characters remaining in string,
> * string shall be set to a single period character. In this
> * case skip steps (5) through (8).
> *
> * (5) If there are any trailing nonslash characters in string,
> * they shall be removed.
> */
> while (--p >= str)
> if (*p == '/')
> break;
> ++p;
> if (p == str) {
> (void)strcpy(newstring, ".");
> return(0);
> }
>
> /*
> * (6) If the remaining string is //, it is implementation defined
> * whether steps (7) and (8) are skipped or processed.
> *
> * This case has already been handled, as part of steps (1) and (2).
> */
>
> /*
> * (7) If there are any trailing slash characters in string, they
> * shall be removed.
> */
> while (--p >= str)
> if (*p != '/')
> break;
> ++p;
>
> /*
> * (8) If the remaining string is empty, string shall be set to
> * a single slash character.
> */
> *p = '\0';
>
> if (p == str) {
> strcpy(newstring, "/");
> } else {
> strncpy(newstring, str, maxlen);
> newstring[maxlen] = '\0';
> }
> return(0);
>}
>
>
>
>
>int basename(const char *string, char *newstring, int maxlen)
>{
>
> int ch;
> char *p;
> char str[256];
>
> strncpy(str, string, 250);
> str[250] = '\0';
>
>
>
> /*
> * (1) If string is // it is implementation defined whether steps (2)
> * through (5) are skipped or processed.
> *
> * (2) If string consists entirely of slash characters, string shall
> * be set to a single slash character. In this case, skip steps
> * (3) through (5).
> */
> for (p = str;; ++p) {
> if (!*p) {
> if (p > str)
> (void)strcpy(newstring, "/");
> else
> (void)strcpy(newstring, "");
> return(0);
> }
> if (*p != '/')
> break;
> }
>
> /*
> * (3) If there are any trailing slash characters in string, they
> * shall be removed.
> */
> for (; *p; ++p)
> continue;
> while (*--p == '/')
> continue;
> *++p = '\0';
>
> /*
> * (4) If there are any slash characters remaining in string, the
> * prefix of string up to an including the last slash character
> * in string shall be removed.
> */
> while (--p >= str)
> if (*p == '/')
> break;
> ++p;
>
> /*
> * (5) If the suffix operand is present, is not identical to the
> * characters remaining in string, and is identical to a suffix
> * of the characters remaining in string, the suffix suffix
> * shall be removed from string.
> */
> if (++*str) {
> int suffixlen, stringlen, off;
>
> suffixlen = strlen(str);
> stringlen = strlen(p);
>
> if (suffixlen < stringlen) {
> off = stringlen - suffixlen;
> if (!strcmp(p + off, str))
> p[off] = '\0';
> }
> }
> (void)strncpy(newstring, p, maxlen);
> return(0);
>}
>
>
>/*
> * Find the first occurrence of find in s.
> */
>char *
>strstr(s, find)
> register const char *s, *find;
>{
> register char c, sc;
> register size_t len;
>
> if ((c = *find++) != 0) {
> len = strlen(find);
> do {
> do {
> if ((sc = *s++) == 0)
> return (NULL);
> } while (sc != c);
> } while (strncmp(s, find, len) != 0);
> s--;
> }
> return ((char *)s);
>}
>
>
>/* The real thing */
>int
>exec_java_imgact(imgp)
> struct image_params *imgp;
>{
>
> const char *image_header = imgp->image_header;
> const char *ihp, *line_endp;
> char *interp;
> static char javabin_name[256];
> static char javabin_path[256];
> static char cpathstr[256];
> static char javatmp[256];
>
>
> /* A java binary? */
>
> if ((image_header[0] != '\xca') || (image_header[1] != '\xfe') ||
> (image_header[2] != '\xba') || (image_header[3] != '\xbe')) {
>#ifdef DEBUG
> printf("Failed to run a java binary : invalid signature?\n");
> return(-1);
>#endif
> }
>
> /* Ok, its a java binary, so lets tell the world */
>
> /* Firstly split the path to the binary up into path and filename */
>
> basename(imgp->uap->fname, javabin_name, sizeof(javabin_name));
> dirname(imgp->uap->fname, javabin_path, sizeof(javabin_path));
>
> /* Now we are going to take the filename, and if it doesn't contain
> ** a .class then return with a "non-executable" error */
> if (strstr(javabin_name, ".class") == NULL) {
> return -1;
> }
>
> /* Ok so we'll assume (stupidly) that the .class is at the end of the
> ** filename, so lets copy the filename over minus the last 6 chars */
>
> strncpy(javatmp, javabin_name, strlen(javabin_name) - 6);
> strcpy(javabin_name, javatmp);
>
>
> /* Since its interpreted we'll tag it as such. */
> imgp->interpreted = 1;
>
> /* And we'll set the interpreter name here too (would help) */
> strncpy(imgp->interpreter_name, interpreter,
sizeof(imgp->interpreter_name));
>
> /* now lets make up our -classpath arguement */
> sprintf(cpathstr, "%s -classpath %s:%s", interpreter, classpath,
javabin_path);
>
> /* Now lets write this into the strings space, just like in the
> ** _shell.c file... */
>
> ihp = cpathstr;
> line_endp = cpathstr + strlen(cpathstr);
>
> while (ihp < line_endp) {
> while ((*ihp == ' ') || (*ihp == '\t')) ihp++;
>
> if (ihp < line_endp) {
> while ((ihp < line_endp) && (*ihp != ' ') && (*ihp != '\t')) {
> *imgp->stringp++ = *ihp++;
> imgp->stringspace--;
> }
> *imgp->stringp++ = 0;
> imgp->stringspace--;
>
> imgp->argc++;
> }
>
> }
>
> strcpy(imgp->uap->fname, javabin_name);
> suword(imgp->uap->argv, (int)imgp->uap->fname);
>
> return (0);
>
>}
>
>/*
> * Tell kern_execve.c about it, with a little help from the linker.
> * Since `const' objects end up in the text segment, TEXT_SET is the
> * correct directive to use.
> */
>const struct execsw java_execsw = { exec_java_imgact, "\xca\xfe\xba\xbe" };
>TEXT_SET(execsw_set, java_execsw);
>
>
>
>
>
Eivind Eklund perhaps@yes.no http://maybe.yes.no/perhaps/ eivind@freebsd.org
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