[原] bash 下修改 ulimit 的 pipe size 报错

用 python subprocess 捕获命令行输出结果失去响应，怀疑是 pipe size 太小，尝试修改。
但报错：

# ulimit -p 16
-bash: ulimit: pipe size: cannot modify limit: Invalid argument

默认值：

引用

# 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) 14848
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) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 14848
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

修改：

# ulimit -p 16
-bash: ulimit: pipe size: cannot modify limit: Invalid argument

排查了一下，发现网上的资料都是错的，一堆的都是 ksh 的修改。实际上，bash 中这个值是不能改的。
见：
bash: ulimit: pipe size: cannot modify limit: Invalid argument

引用

Getting this error because this is not an adjustable parameter.
Refer the manual page for ulimit:
-p The pipe size in 512-byte blocks (this may not be set)
This value can not set. You would probably need to recompile the kernel after changing a header file to alter this value, which is not feasible.

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原创文章，作者：kepupublish，如若转载，请注明出处：https://blog.ytso.com/98242.html

[原] bash 下修改 ulimit 的 pipe size 报错

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