Code:
master ~/programming # strace /sbin/ifconfig eth0
execve("/sbin/ifconfig", ["/sbin/ifconfig", "eth0"], [/* 40 vars */]) = 0
uname({sys="Linux", node="master", ...}) = 0
brk(0) = 0x8054848
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=28188, ...}) = 0
mmap2(NULL, 28188, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40015000
close(3) = 0
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\340V\1"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1228960, ...}) = 0
mmap2(NULL, 1142148, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x4001c000
mprotect(0x4012c000, 28036, PROT_NONE) = 0
mmap2(0x4012d000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x110) = 0x4012d000
mmap2(0x40131000, 7556, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40131000
close(3) = 0
mprotect(0x4012d000, 4096, PROT_READ) = 0
munmap(0x40015000, 28188) = 0
open("/dev/urandom", O_RDONLY) = 3
read(3, "\236%\344\222", 4) = 4
close(3) = 0
brk(0) = 0x8054848
brk(0x8075848) = 0x8075848
brk(0x8076000) = 0x8076000
uname({sys="Linux", node="master", ...}) = 0
access("/proc/net", R_OK) = 0
access("/proc/net/unix", R_OK) = 0
socket(PF_FILE, SOCK_DGRAM, 0) = 3
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
access("/proc/net/if_inet6", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/net/ax25", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/net/nr", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/net/rose", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/net/ipx", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/net/appletalk", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/sys/net/econet", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/sys/net/ash", R_OK) = -1 ENOENT (No such file or directory)
access("/proc/net/x25", R_OK) = -1 ENOENT (No such file or directory)
open("/proc/net/dev", O_RDONLY) = 5
fstat64(5, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(5, "Inter-| Receive "..., 1024) = 577
close(5) = 0
munmap(0x40015000, 4096) = 0
ioctl(4, SIOCGIFFLAGS, {ifr_name="eth0", ifr_flags=IFF_UP|IFF_BROADCAST|IFF_RUNNING|IFF_MULTICAST}) = 0
ioctl(4, SIOCGIFHWADDR, {ifr_name="eth0", ifr_hwaddr=00:50:da:0f:cc:7f}) = 0
ioctl(4, SIOCGIFMETRIC, {ifr_name="eth0", ifr_metric=0}) = 0
ioctl(4, SIOCGIFMTU, {ifr_name="eth0", ifr_mtu=1500}) = 0
ioctl(4, SIOCGIFMAP, 0xbffff73c) = 0
ioctl(4, SIOCGIFMAP, 0xbffff73c) = 0
ioctl(4, SIOCGIFTXQLEN, 0xbffff73c) = 0
ioctl(4, SIOCGIFADDR, {ifr_name="eth0", ifr_addr={AF_INET, inet_addr("192.168.1.1")}}) = 0
ioctl(4, SIOCGIFDSTADDR, {ifr_name="eth0", ifr_dstaddr={AF_INET, inet_addr("192.168.1.1")}}) = 0
ioctl(4, SIOCGIFBRDADDR, {ifr_name="eth0", ifr_broadaddr={AF_INET, inet_addr("192.168.1.255")}}) = 0
ioctl(4, SIOCGIFNETMASK, {ifr_name="eth0", ifr_netmask={AF_INET, inet_addr("255.255.255.0")}}) = 0
fstat64(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) = 0x40015000
write(1, "eth0 Link encap:Ethernet H"..., 58eth0 Link encap:Ethernet HWaddr 00:50:DA:0F:CC:7F
) = 58
write(1, " inet addr:192.168.1.1 "..., 73 inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
) = 73
open("/proc/net/if_inet6", O_RDONLY) = -1 ENOENT (No such file or directory)
write(1, " UP BROADCAST RUNNING M"..., 61 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
) = 61
write(1, " RX packets:215069171 e"..., 69 RX packets:215069171 errors:0 dropped:0 overruns:0 frame:0
) = 69
write(1, " TX packets:216064497 e"..., 71 TX packets:216064497 errors:0 dropped:0 overruns:0 carrier:0
) = 71
write(1, " collisions:0 txqueuele"..., 40 collisions:0 txqueuelen:1000
) = 40
write(1, " RX bytes:1441299436 (1"..., 73 RX bytes:1441299436 (1374.5 Mb) TX bytes:649580468 (619.4 Mb)
) = 73
write(1, " Interrupt:11 Base addr"..., 44 Interrupt:11 Base address:0xdc00
) = 44
write(1, "\n", 1
) = 1
close(4) = 0
munmap(0x40015000, 4096) = 0
exit_group(0) = ?