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toolbox: add prlimit command

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adb shell prlimit <pid> <cur> <max>

prlimit uses prlimit internally to allow you to set the limits on an arbitrary
process, if you have the privileges to.

Change-Id: Ie9a5dc510c7c695debd8f948361d4c51befa5604
Signed-off-by: Iliyan Malchev <malchev@google.com>
This commit is contained in:
Iliyan Malchev 2014-10-25 11:57:35 -07:00
parent 6e93b246d4
commit 5b244cd414
2 changed files with 77 additions and 0 deletions
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1
toolbox/Android.mk
View file

@ -176,6 +176,7 @@ OUR_TOOLS := \
readlink \
renice \
restorecon \
prlimit \
rmmod \
route \
runcon \

76
toolbox/prlimit.c Normal file
View file

@ -0,0 +1,76 @@
/*
* Copyright (c) 2014, The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/resource.h>
static void
usage(const char *s)
{
fprintf(stderr, "usage: %s pid resource cur max\n", s);
exit(EXIT_FAILURE);
}
int prlimit_main(int argc, char *argv[])
{
pid_t pid;
struct rlimit64 rl;
int resource;
int rc;
if (argc != 5)
usage(*argv);
if (sscanf(argv[1], "%d", &pid) != 1)
usage(*argv);
if (sscanf(argv[2], "%d", &resource) != 1)
usage(*argv);
if (sscanf(argv[3], "%llu", &rl.rlim_cur) != 1)
usage(*argv);
if (sscanf(argv[4], "%llu", &rl.rlim_max) != 1)
usage(*argv);
printf("setting resource %d of pid %d to [%llu,%llu]\n", resource, pid,
rl.rlim_cur, rl.rlim_max);
rc = prlimit64(pid, resource, &rl, NULL);
if (rc < 0) {
perror("prlimit");
exit(EXIT_FAILURE);
}
return 0;
}