执行排序时泄漏

Question

我有一个包含记录的文件，想通过在项目内部调用sort来对它们进行sort 。 运行该程序时，一切似乎都很好，但是尝试使用valgrind检查leaks时，我遇到了很多错误。 这是我用来执行的代码：

execlp("sort", "-g", "results", (char*) NULL);

results是我要整理的文件。

并且有错误。

==27691== 
==27691== HEAP SUMMARY:
==27691==     in use at exit: 1,352 bytes in 17 blocks
==27691==   total heap usage: 66 allocs, 49 frees, 44,055 bytes allocated
==27691== 
==27691== 16 bytes in 1 blocks are definitely lost in loss record 1 of 6
==27691==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x4110C8: ??? (in /usr/bin/sort)
==27691==    by 0x402FFD: ??? (in /usr/bin/sort)
==27691==    by 0x507782F: (below main) (libc-start.c:291)
==27691== 
==27691== 64 bytes in 1 blocks are indirectly lost in loss record 2 of 6
==27691==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x4110C8: ??? (in /usr/bin/sort)
==27691==    by 0x40D33C: ??? (in /usr/bin/sort)
==27691==    by 0x4046A2: ??? (in /usr/bin/sort)
==27691==    by 0x507782F: (below main) (libc-start.c:291)
==27691== 
==27691== 88 bytes in 12 blocks are still reachable in loss record 3 of 6
==27691==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x4110C8: ??? (in /usr/bin/sort)
==27691==    by 0x402D66: ??? (in /usr/bin/sort)
==27691==    by 0x507782F: (below main) (libc-start.c:291)
==27691== 
==27691== 128 bytes in 1 blocks are still reachable in loss record 4 of 6
==27691==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x4C2FDEF: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x411125: ??? (in /usr/bin/sort)
==27691==    by 0x405D89: ??? (in /usr/bin/sort)
==27691==    by 0x4043C0: ??? (in /usr/bin/sort)
==27691==    by 0x507782F: (below main) (libc-start.c:291)
==27691== 
==27691== 1,024 bytes in 1 blocks are indirectly lost in loss record 5 of 6
==27691==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x4110C8: ??? (in /usr/bin/sort)
==27691==    by 0x4046D4: ??? (in /usr/bin/sort)
==27691==    by 0x507782F: (below main) (libc-start.c:291)
==27691== 
==27691== 1,120 (32 direct, 1,088 indirect) bytes in 1 blocks are definitely lost in loss record 6 of 6
==27691==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==27691==    by 0x4110C8: ??? (in /usr/bin/sort)
==27691==    by 0x40D313: ??? (in /usr/bin/sort)
==27691==    by 0x4046A2: ??? (in /usr/bin/sort)
==27691==    by 0x507782F: (below main) (libc-start.c:291)
==27691== 
==27691== LEAK SUMMARY:
==27691==    definitely lost: 48 bytes in 2 blocks
==27691==    indirectly lost: 1,088 bytes in 2 blocks
==27691==      possibly lost: 0 bytes in 0 blocks
==27691==    still reachable: 216 bytes in 13 blocks
==27691==         suppressed: 0 bytes in 0 blocks
==27691== 
==27691== For counts of detected and suppressed errors, rerun with: -v
==27691== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

难道我做错了什么？ 我没有分配任何指针，并且似乎没有错误，因为它们没有出现在我的项目中。