- ファイルの個数やサイズ、メモリ使用量を制限(ulimit)
メモリ割り当て不可、など、とりあえず何でもいいからコマンドを失敗させたい時とかのテストに使えるかも。
user@ubuntu:~$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 3780 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 3780 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited user@ubuntu:~$ user@ubuntu:~$ ulimit -v 1200 user@ubuntu:~$ user@ubuntu:~$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 3780 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 3780 virtual memory (kbytes, -v) 1200 file locks (-x) unlimited user@ubuntu:~$ user@ubuntu:~$ vi; echo $? Segmentation fault 139 user@ubuntu:~$
user@ubuntu:~$ cat a あいうえお user@ubuntu:~$ nkf -g a UTF-8 user@ubuntu:~$ cat a |iconv -f UTF-8 -t Shift_JIS |nkf -g Shift_JIS user@ubuntu:~$
