VE:~# strace candump vcan0
execve("/usr/local/bin/candump", ["candump", "vcan0"], [/* 41 vars */]) = 0
brk(0)                                  = 0x8bc4000
uname({sys="Linux", node="tees-ubutsvm-010", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7787000
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=49466, ...}) = 0
mmap2(NULL, 49466, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb777a000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", 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\0 m\1\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1335560, ...}) = 0
mmap2(NULL, 1345896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb7631000
mprotect(0xb7773000, 4096, PROT_NONE)   = 0
mmap2(0xb7774000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x142) = 0xb7774000
mmap2(0xb7777000, 10600, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7777000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7630000
set_thread_area({entry_number:-1 -> 12, base_addr:0xb76306c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xb7774000, 8192, PROT_READ)   = 0
mprotect(0xb77a4000, 4096, PROT_READ)   = 0
munmap(0xb777a000, 49466)               = 0
rt_sigaction(SIGTERM, {0x8048b00, [TERM], SA_RESTORER|SA_RESTART, 0xb765b6a8}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGHUP, {0x8048b00, [HUP], SA_RESTORER|SA_RESTART, 0xb765b6a8}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGINT, {0x8048b00, [INT], SA_RESTORER|SA_RESTART, 0xb765b6a8}, {SIG_DFL, [], 0}, 8) = 0
socket(0x1d /* PF_??? */, SOCK_RAW, 1)  = -1 EAFNOSUPPORT (Address family not supported by protocol)
dup(2)                                  = 3
fcntl64(3, F_GETFL)                     = 0x8002 (flags O_RDWR|O_LARGEFILE)
brk(0)                                  = 0x8bc4000
brk(0x8be5000)                          = 0x8be5000
fstat64(3, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 8), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7786000
_llseek(3, 0, 0xbfbbb284, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
write(3, "socket: Address family not suppo"..., 49socket: Address family not supported by protocol
) = 49
close(3)                                = 0
munmap(0xb7786000, 4096)                = 0
exit_group(1)                           = ?