Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 11-05-2007, Руководство по установке

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1.17 0.230765 27 8358 memcpy
[...]
0.00 0.000036 36 1 textdomain
------ ----------- ----------- --------- --------------------
100.00 19.662715 105717 total
16.1.3 System Calls of a Program Run:
strace
The utility
strace
enables you to trace all the system calls of a process currently
running. Enter the command in the normal way, adding
strace
at the beginning of
the line:
tester@linux:~> strace ls
execve("/bin/ls", ["ls"], [/* 61 vars */]) = 0
uname({sys="Linux", node="linux", ...}) = 0
brk(0) = 0x805c000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or \
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=89696, ...}) = 0
mmap2(NULL, 89696, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7ef2000
close(3) = 0
open("/lib/librt.so.1", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000\36\0"..., 512) \
= 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=36659, ...}) = 0
[...]
stat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) \
= 0xb7ca7000
write(1, "bin Desktop Documents music\tM"..., 55bin Desktop Documents \
\ music Music public_html tmp
) = 55
close(1) = 0
munmap(0xb7ca7000, 4096) = 0
exit_group(0) = ?
For example, to trace all attempts to open a particular file, use the following:
tester@linux:~> strace -e open ls .bashrc
open("/etc/ld.so.cache", O_RDONLY) = 3
open("/lib/librt.so.1", O_RDONLY) = 3
open("/lib/libacl.so.1", O_RDONLY) = 3
System Monitoring Utilities 309