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| strace -f -o cat_ftrace_enabled.log cat /proc/sys/kernel/ftrace_enabled
1 426068 execve("/usr/bin/cat", ["cat", "/proc/sys/kernel/ftrace_enabled"], 0x7ffce33a7570 /* 33 vars */) = 0
2 426068 brk(NULL) = 0x55fcae89d000
3 426068 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
4 426068 openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
5 426068 fstat(3, {st_mode=S_IFREG|0644, st_size=79487, ...}) = 0
6 426068 mmap(NULL, 79487, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fea8856e000
7 426068 close(3) = 0
8 426068 openat(AT_FDCWD, "/usr/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
9 426068 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\\\2\0\0\0\0\0"..., 832) = 832
10 426068 fstat(3, {st_mode=S_IFREG|0755, st_size=1791192, ...}) = 0
11 426068 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fea8856c000
12 426068 mmap(NULL, 1799384, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fea883b4000
13 426068 mprotect(0x7fea883d9000, 1609728, PROT_NONE) = 0
14 426068 mmap(0x7fea883d9000, 1327104, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7fea883d9000
15 426068 mmap(0x7fea8851d000, 278528, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x169000) = 0x7fea8851d000
16 426068 mmap(0x7fea88562000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ad000) = 0x7fea88562000
17 426068 mmap(0x7fea88568000, 13528, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fea88568000
18 426068 close(3) = 0
19 426068 arch_prctl(ARCH_SET_FS, 0x7fea8856d540) = 0
20 426068 mprotect(0x7fea88562000, 12288, PROT_READ) = 0
21 426068 mprotect(0x55fcae839000, 4096, PROT_READ) = 0
22 426068 mprotect(0x7fea885a8000, 4096, PROT_READ) = 0
23 426068 munmap(0x7fea8856e000, 79487) = 0
24 426068 brk(NULL) = 0x55fcae89d000
25 426068 brk(0x55fcae8be000) = 0x55fcae8be000
26 426068 brk(NULL) = 0x55fcae8be000
27 426068 openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
28 426068 fstat(3, {st_mode=S_IFREG|0644, st_size=215157200, ...}) = 0
29 426068 mmap(NULL, 215157200, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fea7b683000
30 426068 close(3) = 0
31 426068 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0x4), ...}) = 0
32 426068 openat(AT_FDCWD, "/proc/sys/kernel/ftrace_enabled", O_RDONLY) = 3
33 426068 fstat(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
34 426068 fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
35 426068 mmap(NULL, 139264, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fea7b661000
36 426068 read(3, 0x7fea7b662000, 131072) = -1 ENODEV (No such device)
37 426068 write(2, "cat: ", 5) = 5
38 426068 write(2, "/proc/sys/kernel/ftrace_enabled", 31) = 31
39 426068 openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 4
40 426068 fstat(4, {st_mode=S_IFREG|0644, st_size=2997, ...}) = 0
41 426068 read(4, "# Locale name alias data base.\n#"..., 4096) = 2997
42 426068 read(4, "", 4096) = 0
43 426068 close(4) = 0
44 426068 openat(AT_FDCWD, "/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
45 426068 openat(AT_FDCWD, "/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
46 426068 openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
47 426068 openat(AT_FDCWD, "/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
48 426068 openat(AT_FDCWD, "/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
49 426068 openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
50 426068 write(2, ": No such device", 16) = 16
51 426068 write(2, "\n", 1) = 1
52 426068 munmap(0x7fea7b661000, 139264) = 0
53 426068 close(3) = 0
54 426068 close(1) = 0
55 426068 close(2) = 0
56 426068 exit_group(1) = ?
57 426068 +++ exited with 1 +++
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