我从linux中的C++程序启动程序,如下所示:
char* cmd = "/bin/snmpd &"; // command to execute
FILE* pipe = popen(cmd, "r"); // pipe to command line
if (!pipe) return -1; // check if pipe worked
pclose(pipe); // close pipe
return 1;
我编写此函数是为了与外部程序通信。这样的程序从stdin获取输入,并在stdout上打印其输出。为了使我的代码与这个程序通信,我使用管道将stdin和stdout重定向到缓冲区。
int query_oracle(mpz * c,int *t, mpz * m) {
int out_pipe[2];
int in_pipe[2];
int saved_stdout;
int saved_stdin;
// REDIRECT STDIN
saved_stdin = dup(STDIN_FILENO); /* save stdin for later */
嗨,我目前正在修复我的英勇错误,它们是:
==11925== ERROR SUMMARY: 9 errors from 1 contexts (suppressed: 0 from 0)
==11925==
==11925== 9 errors in context 1 of 1:
==11925== Syscall param ioctl(generic) points to uninitialised byte(s)
==11925== at 0xF8B7F47: ioctl (syscall-template.S:84)
==11925== by 0x1F770DAD: d
我有一个奇怪的问题,我似乎无法解决
from subprocess import PIPE, Popen
exeLocation = "../Engine.exe"
# Works on windows
proc = Popen([exeLocation, arg1, arg2],stdout=PIPE,shell=True])
(out,err) = proc.communicate()
# Works on Linux
proc = Popen(" ".join([exeLocation, arg1, arg2]),stdout=PIPE,shell=
如何在linux管道上设置写()的超时?
示例代码:
int fd_pipe = open("/run/some/pipe", O_RDWR);
// here i need to set timeout for 3 seconds somehow, if can't write, code will continue...
write(fd_pipe, something, strlen(something));
// continue executing..
谢谢
我已经在我的windows机器上安装了Docker 17.12.0-ce,当我运行docker时,我得到了以下错误,我如何解决它?
Unable to stop: Killed VM MobyLinuxVM did not stop
at Fatal, <No file>: line 400
at Stop-VM-Force, <No file>: line 388
at Stop-MobyLinuxVM, <No file>: line 326
at <ScriptBlock>, <No file>: line 407
at
https://elixir.bootlin.com/linux/v5.19/source/fs/pipe.c#L247
当一个管道满了的时候,它不应该唤醒读者读出数据吗?
/*
* We only wake up writers if the pipe was full when we started
* reading in order to avoid unnecessary wakeups.
*
* But when we do wake up writers, we do so using a sync wakeup
* (W
我在一个文件中有一组linux命令,我试图在python脚本中逐一执行它们。
for line in file:
p = subprocess.Popen(line,shell=True,stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE)
上面的行不执行任何命令,因为我看不到任何输出。如果只显式地提供命令,那么它就会被执行。
cmd = "date"
p = subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE, stdin
将脚本运行到ssh并返回iostat错误时,
solaris_command = "iostat -en | awk 'NR>=3 && $4 > 0' | while read a b c d e; do echo $e,$a,$b,$c,$d; done"
for line in server_list:
line_arr = line.split(',')
if line_arr[0] == 'SunOS':
ie = subprocess.Popen(["