linux 查看進程打開的文件

查看進程打開的文件

lsof [options] [name]

例如：源碼test.c

#include <stdio.h>
#include <unistd.h>
int main(void)
{
    FILE* fp = fopen("file", "w");
    if(fp == NULL)
    {
        return 1;
    }
    while(1)
        sleep((unsigned int)1);
    return 0;
}

gcc test.c
./a.out

• 查看哪些進程打開了file文件

where@ubuntu:~/workspace$ lsof file
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing
      Output information may be incomplete.
COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF   NODE NAME
a.out   6065 where    3w   REG    8,1        0 429381 file
a.out   6070 where    3w   REG    8,1        0 429381 file

• 查看進程pid爲6065的進程所開發的文件

where@ubuntu:~/workspace$ lsof -p 6065
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing
      Output information may be incomplete.
COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME
a.out   6065 where  cwd    DIR    8,1     4096  395339 /home/where/workspace
a.out   6065 where  rtd    DIR    8,1     4096       2 /
a.out   6065 where  txt    REG    8,1     8656  429363 /home/where/workspace/a.out
a.out   6065 where  mem    REG    8,1  1864888 1053934 /lib/x86_64-Linux-gnu/libc-2.23.so
a.out   6065 where  mem    REG    8,1   162632 1053906 /lib/x86_64-Linux-gnu/ld-2.23.so
a.out   6065 where    0u   CHR  136,4      0t0       7 /dev/pts/4
a.out   6065 where    1u   CHR  136,4      0t0       7 /dev/pts/4
a.out   6065 where    2u   CHR  136,4      0t0       7 /dev/pts/4
a.out   6065 where    3w   REG    8,1        0  429381 /home/where/workspace/file

這邊把這個進程所使用的動態庫，以及佔用的目錄，打開的文件都顯示出了。