cmd/isaexec/isaexec.c

	isaexec.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <locale.h>
#include <sys/types.h>
#include <sys/systeminfo.h>

/*ARGSUSED*/
int
main(int argc, char **argv, char **envp)
{
    const char *execname;
    const char *fname;
    char *isalist;
    ssize_t isalen;
    char *pathname;
    ssize_t len;
    char scratch[1];
    char *str;

#if !defined(TEXT_DOMAIN)       /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST"  /* Use this only if it wasn't */
#endif
    (void) setlocale(LC_ALL, "");
    (void) textdomain(TEXT_DOMAIN);

    /*
     * Get the isa list.
     */
    if ((isalen = sysinfo(SI_ISALIST, scratch, 1)) == -1 ||
        (isalist = malloc(isalen)) == NULL ||
        sysinfo(SI_ISALIST, isalist, isalen) == -1) {
        (void) fprintf(stderr,
            gettext("%s: cannot find the ISA list\n"),
            argv[0]);
        return (1);
    }

    /*
     * Get the exec name.
     */
    if ((execname = getexecname()) == NULL) {
        (void) fprintf(stderr,
            gettext("%s: getexecname() failed\n"),
            argv[0]);
        return (1);
    }

    /*
     * Allocate a path name buffer.  The sum of the lengths of the
     * execname and isalist strings is guaranteed to be big enough.
     */
    len = strlen(execname) + isalen;
    if ((pathname = malloc(len)) == NULL) {
        (void) fprintf(stderr,
            gettext("%s: malloc(%d) failed\n"),
            argv[0], (int)len);
        return (1);
    }

    /*
     * Break the exec name into directory and file name components.
     */
    (void) strcpy(pathname, execname);
    if ((str = strrchr(pathname, '/')) != NULL) {
        *++str = '\0';
        fname = execname + (str - pathname);
    } else {
        fname = execname;
        *pathname = '\0';
    }
    len = strlen(pathname);

    /*
     * For each name in the isa list, look for an executable file
     * with the given file name in the corresponding subdirectory.
     */
    str = strtok(isalist, " ");
    do {
        (void) strcpy(pathname+len, str);
        (void) strcat(pathname+len, "/");
        (void) strcat(pathname+len, fname);
        if (access(pathname, X_OK) == 0) {
            /*
             * File exists and is marked executable.  Attempt
             * to execute the file from the subdirectory,
             * using the user-supplied argv and envp.
             */
            (void) execve(pathname, argv, envp);
            (void) fprintf(stderr,
                gettext("%s: execve(\"%s\") failed\n"),
                argv[0], pathname);
        }
    } while ((str = strtok(NULL, " ")) != NULL);

    (void) fprintf(stderr,
        gettext("%s: cannot find/execute \"%s\" in ISA subdirectories\n"),
        argv[0], fname);

    return (1);
}