~> strace ls
execve("/bin/ls", ["ls"], [/* 40 vars */]) = 0
uname({sys="Linux", node="espec.ppgia.pucpr.br", ...}) = 0
set_tid_address(0)                      = -1 ENOSYS (Function not implemented)
brk(0)                                  = 0x8058da8
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=69633, ...}) = 0
old_mmap(NULL, 69633, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40016000
close(3)                                = 0
open("/lib/libtermcap.so.2", 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\340\r\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=11784, ...}) = 0
old_mmap(NULL, 14856, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40028000
old_mmap(0x4002b000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x2000) = 0x4002b000
close(3)                                = 0
open("/lib/i686/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 [\1\000"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1552740, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4002c000
old_mmap(NULL, 1279684, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4002d000
old_mmap(0x40160000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x133000) = 0x40160000
old_mmap(0x40163000, 9924, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40163000
close(3)                                = 0
munmap(0x40016000, 69633)               = 0
open("/usr/lib/locale/locale-archive", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=31215088, ...}) = 0
mmap2(NULL, 2097152, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40166000
mmap2(NULL, 208896, PROT_READ, MAP_PRIVATE, 3, 0x9bb) = 0x40366000
brk(0)                                  = 0x8058da8
brk(0x8059da8)                          = 0x8059da8
brk(0)                                  = 0x8059da8
brk(0x805a000)                          = 0x805a000
close(3)                                = 0
rt_sigaction(SIGTERM, {0x8049700, [TERM], SA_RESTORER|SA_RESTART, 0x400555a8}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGKILL, {0x8049700, [KILL], SA_RESTORER|SA_RESTART, 0x400555a8}, {SIG_DFL}, 8) = -1 EINVAL (Invalid argument)
rt_sigaction(SIGSTOP, {0x8049700, [STOP], SA_RESTORER|SA_RESTART, 0x400555a8}, {SIG_DFL}, 8) = -1 EINVAL (Invalid argument)
ioctl(1, SNDCTL_TMR_TIMEBASE, 0xbffff880) = -1 EINVAL (Invalid argument)
ioctl(1, TIOCGWINSZ, 0xbffff958)        = -1 EINVAL (Invalid argument)
brk(0)                                  = 0x805a000
brk(0x805d000)                          = 0x805d000
open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
fstat64(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
brk(0)                                  = 0x805d000
brk(0x805e000)                          = 0x805e000
getdents64(3, /* 18 entries */, 4096)   = 536
getdents64(3, /* 0 entries */, 4096)    = 0
close(3)                                = 0
open("/etc/mtab", O_RDONLY)             = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=193, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40016000
read(3, "/dev/sda3 / ext3 rw 0 0\nnone /pr"..., 4096) = 193
close(3)                                = 0
munmap(0x40016000, 4096)                = 0
open("/proc/meminfo", O_RDONLY)         = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40016000
read(3, "        total:    used:    free:"..., 4096) = 528
close(3)                                = 0
munmap(0x40016000, 4096)                = 0
fstat64(1, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40016000
write(1, "complex\nescreva.c\nescreva.o\ngmon"..., 122complex
escreva.c
escreva.o
gmon.out
hello
hello.c
hello.o
pi
pi.c
pi.c~
pis
shared
static
test.h~
typescript
typescript~
) = 122
close(1)                                = 0
munmap(0x40016000, 4096)                = 0
exit_group(0)                           = ?