差分

このページの2つのバージョン間の差分を表示します。

--- hardware:gl-ar750s-ext:strace [2020/03/16 10:24] – 作成ともやん
+++ hardware:gl-ar750s-ext:strace [2020/09/11 19:08] (現在) – [実行] ともやん
@@ 行 1: / 行 1: @@
-<html>
-  <style>
-    #result pre {
-      overflow: scroll;
-      overflow-x: hidden;
-      font-size: 10px;
-    }
-    #result_long pre {
-      height: 300px;
-      overflow: scroll;
-      overflow-x: hidden;
-      font-size: 10px;
-    }
-  </style>
-</html>
 ====== strace コマンド ======
@@ 行 46: / 行 31: @@
 </WRAP>
+===== 動作確認 =====
+<code>
+# strace -h
+</code>
+<WRAP prewrap 100% #result_long>
+<code>
+usage: strace [-CdffhiqrtttTvVwxxy] [-I n] [-e expr]...
+              [-a column] [-o file] [-s strsize] [-P path]...
+              -p pid... / [-D] [-E var=val]... [-u username] PROG [ARGS]
+   or: strace -c[dfw] [-I n] [-e expr]... [-O overhead] [-S sortby]
+              -p pid... / [-D] [-E var=val]... [-u username] PROG [ARGS]
+Output format:
+  -a column      alignment COLUMN for printing syscall results (default 40)
+  -i             print instruction pointer at time of syscall
+  -o file        send trace output to FILE instead of stderr
+  -q             suppress messages about attaching, detaching, etc.
+  -r             print relative timestamp
+  -s strsize     limit length of print strings to STRSIZE chars (default 32)
+  -t             print absolute timestamp
+  -tt            print absolute timestamp with usecs
+  -T             print time spent in each syscall
+  -x             print non-ascii strings in hex
+  -xx            print all strings in hex
+  -y             print paths associated with file descriptor arguments
+  -yy            print protocol specific information associated with socket file descriptors
+Statistics:
+  -c             count time, calls, and errors for each syscall and report summary
+  -C             like -c but also print regular output
+  -O overhead    set overhead for tracing syscalls to OVERHEAD usecs
+  -S sortby      sort syscall counts by: time, calls, name, nothing (default time)
+  -w             summarise syscall latency (default is system time)
+Filtering:
+  -e expr        a qualifying expression: option=[!]all or option=[!]val1[,val2]...
+     options:    trace, abbrev, verbose, raw, signal, read, write, fault
+  -P path        trace accesses to path
+Tracing:
+  -b execve      detach on execve syscall
+  -D             run tracer process as a detached grandchild, not as parent
+  -f             follow forks
+  -ff            follow forks with output into separate files
+  -I interruptible
+:          no signals are blocked
+:          fatal signals are blocked while decoding syscall (default)
+:          fatal signals are always blocked (default if '-o FILE PROG')
+:          fatal signals and SIGTSTP (^Z) are always blocked
+                 (useful to make 'strace -o FILE PROG' not stop on ^Z)
+Startup:
+  -E var         remove var from the environment for command
+  -E var=val     put var=val in the environment for command
+  -p pid         trace process with process id PID, may be repeated
+  -u username    run command as username handling setuid and/or setgid
+Miscellaneous:
+  -d             enable debug output to stderr
+  -v             verbose mode: print unabbreviated argv, stat, termios, etc. args
+  -h             print help message
+  -V             print version
+</code>
+</WRAP>
+===== 実行 =====
+strace [プロセス(コマンド等)]\\
+\\
+実行例:\\
+<code>
+# strace ls
+</code>
+<WRAP prewrap 100% #result>
+<code>
+execve("/bin/ls", ["ls"], 0x7faec570 /* 13 vars */) = 0
+set_thread_area(0x77cc1da0)             = 0
+set_tid_address(0x77cbad08)             = 2290
+open("/etc/ld-musl-mips-sf.path", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
+open("/lib/libgcc_s.so.1", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
+fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
+fstat64(3, {st_mode=S_IFREG|0644, st_size=87624, ...}) = 0
+read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\10\0\0\0\1\0\0(0\0\0\0004"..., 936) = 936
+mmap2(NULL, 155648, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x77be2000
+mmap2(0x77c07000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x15000) = 0x77c07000
+close(3)                                = 0
+mprotect(0x45f000, 4096, PROT_READ)     = 0
+prctl(PR_SET_NAME, "ls")                = 0
+getuid()                                = 0
+clock_gettime(CLOCK_REALTIME, {tv_sec=1584324418, tv_nsec=689099805}) = 0
+ioctl(0, TIOCGWINSZ, 0x7fd4acd8)        = 0
+ioctl(1, TIOCGWINSZ, 0x7fd4ad10)        = 0
+ioctl(1, TIOCGWINSZ, 0x7fd4ad10)        = 0
+stat64(".", {st_mode=S_IFDIR|0755, st_size=3, ...}) = 0
+open(".", O_RDONLY|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 3
+fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
+getdents64(3, /* 2 entries */, 2048)    = 48
+getdents64(3, /* 0 entries */, 2048)    = 0
+close(3)                                = 0
+exit_group(0)                           = ?
++++ exited with 0 +++
+</code>
+</WRAP>