Performance
根據文件句柄號獲取文件名
我正在
strace -p 1234 -o strace.out一個系統上執行，該系統懷疑該程序1234執行不良。我看到這些reads需要將近一分鐘才能完成：read(11, "\0\335\0\0\6\0\0\0\0\0\20\27m\3708\341\246\247\365\374\334\0274-X#\21!xs\10\25"..., 2064) = 221我希望找出文件名與文件句柄相關聯
11。更新
$ sudo strace -yp 3549 -o strace.out.2 strace: invalid option -- y usage: strace [-dffhiqrtttTvVxx] [-a column] [-e expr] ... [-o file] [-p pid] ... [-s strsize] [-u username] [-E var=val] ... [command [arg ...]] or: strace -c [-e expr] ... [-O overhead] [-S sortby] [-E var=val] ... [command [arg ...]] -c -- count time, calls, and errors for each syscall and report summary -f -- follow forks, -ff -- with output into separate files -F -- attempt to follow vforks, -h -- print help message -i -- print instruction pointer at time of syscall -q -- suppress messages about attaching, detaching, etc. -r -- print relative timestamp, -t -- absolute timestamp, -tt -- with usecs -T -- print time spent in each syscall, -V -- print version -v -- verbose mode: print unabbreviated argv, stat, termio[s], etc. args -x -- print non-ascii strings in hex, -xx -- print all strings in hex -a column -- alignment COLUMN for printing syscall results (default 40) -e expr -- a qualifying expression: option=[!]all or option=[!]val1[,val2]... options: trace, abbrev, verbose, raw, signal, read, or write -o file -- send trace output to FILE instead of stderr -O overhead -- set overhead for tracing syscalls to OVERHEAD usecs -p pid -- trace process with process id PID, may be repeated -s strsize -- limit length of print strings to STRSIZE chars (default 32) -S sortby -- sort syscall counts by: time, calls, name, nothing (default time) -u username -- run command as username handling setuid and/or setgid -E var=val -- put var=val in the environment for command -E var -- remove var from the environment for command
當您執行 Linux 時，您可以找到與您的 uid 擁有的任何程序（或所有，如果是 root）的任何文件描述符相關聯的文件名
ls。例如：
ls -lF /proc/1234/fd/11
來自精美手冊：
-y Print paths associated with file descriptor argu- ments