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      1 /*
      2  * Check decoding of prctl PR_GET_NAME/PR_SET_NAME operations.
      3  *
      4  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr (at) gmail.com>
      5  * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org>
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. The name of the author may not be used to endorse or promote products
     17  *    derived from this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "tests.h"
     32 
     33 #ifdef HAVE_PRCTL
     34 # include <sys/prctl.h>
     35 #endif
     36 
     37 #if defined HAVE_PRCTL && defined PR_GET_NAME && defined PR_SET_NAME
     38 
     39 # include <stdio.h>
     40 # include <string.h>
     41 # include <unistd.h>
     42 
     43 int
     44 main(void)
     45 {
     46 	static const char str[] = "0123456789abcdef";
     47 	static const int len = sizeof(str) - 1;
     48 	char *name = tail_memdup(str, sizeof(str));
     49 	int i;
     50 	int rc;
     51 
     52 	rc = prctl(PR_SET_NAME, NULL);
     53 	printf("prctl(PR_SET_NAME, NULL) = %s\n", sprintrc(rc));
     54 
     55 	for (i = 0; i <= len; ++i) {
     56 		rc = prctl(PR_SET_NAME, name + len - i);
     57 		printf("prctl(PR_SET_NAME, \"%.*s\"%s) = %s\n",
     58 		       i < len - 1 ? i : len - 1,
     59 		       str + len - i,
     60 		       i < len - 1 ? "" : "...",
     61 		       sprintrc(rc));
     62 	}
     63 
     64 	*name = -1;
     65 	++name;
     66 	memcpy(name, str, len);
     67 
     68 	for (i = 0; i <= len; ++i) {
     69 		rc = prctl(PR_SET_NAME, name + len - i);
     70 		if (i < len - 1)
     71 			printf("prctl(PR_SET_NAME, %p) = %s\n",
     72 			       name + len - i, sprintrc(rc));
     73 		else
     74 			printf("prctl(PR_SET_NAME, \"%.*s\"...) = %s\n",
     75 			       len - 1, str + len - i, sprintrc(rc));
     76 	}
     77 
     78 	rc = prctl(PR_GET_NAME, NULL);
     79 	printf("prctl(PR_GET_NAME, NULL) = %s\n", sprintrc(rc));
     80 
     81 	for (i = 0; i < len; ++i) {
     82 		rc = prctl(PR_GET_NAME, name + len - i);
     83 		printf("prctl(PR_GET_NAME, %p) = %s\n",
     84 		       name + len - i, sprintrc(rc));
     85 	}
     86 
     87 	rc = prctl(PR_GET_NAME, name);
     88 	if (rc)
     89 		printf("prctl(PR_GET_NAME, %p) = %s\n",
     90 		       name, sprintrc(rc));
     91 	else
     92 		printf("prctl(PR_GET_NAME, \"%.*s\") = %s\n",
     93 		       len - 1, name, sprintrc(rc));
     94 
     95 	puts("+++ exited with 0 +++");
     96 	return 0;
     97 }
     98 
     99 #else
    100 
    101 SKIP_MAIN_UNDEFINED("HAVE_PRCTL && PR_GET_NAME && PR_SET_NAME")
    102 
    103 #endif
    104