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a6578a04e4
Testing packetdrill using valgrind resulted in finding a memory leak in ibv_read_sysfs_file(). The attached patch fixes it. Submitted by: tuexen@ Approved by: hselasky (mentor) MFC after: 1 week Sponsored by: Mellanox Technologies
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#define _GNU_SOURCE
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/sysctl.h>
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#include "ibverbs.h"
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static const char *sysfs_path;
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const char *ibv_get_sysfs_path(void)
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{
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const char *env = NULL;
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if (sysfs_path)
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return sysfs_path;
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/*
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* Only follow use path passed in through the calling user's
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* environment if we're not running SUID.
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*/
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if (getuid() == geteuid())
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env = getenv("SYSFS_PATH");
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if (env) {
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int len;
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char *dup;
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sysfs_path = dup = strndup(env, IBV_SYSFS_PATH_MAX);
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len = strlen(dup);
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while (len > 0 && dup[len - 1] == '/') {
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--len;
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dup[len] = '\0';
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}
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} else
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sysfs_path = "/sys";
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return sysfs_path;
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}
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int ibv_read_sysfs_file(const char *dir, const char *file,
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char *buf, size_t size)
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{
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char *path, *s;
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int ret;
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size_t len;
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if (asprintf(&path, "%s/%s", dir, file) < 0)
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return -1;
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for (s = &path[0]; *s != '\0'; s++)
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if (*s == '/')
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*s = '.';
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len = size;
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ret = sysctlbyname(&path[1], buf, &len, NULL, 0);
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free(path);
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if (ret == -1)
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return -1;
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if (len > 0 && buf[len - 1] == '\n')
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buf[--len] = '\0';
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return len;
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}
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