ls命令在linux中使用哪个linux系统调用来显示文件夹/文件名？

我想通过ls命令知道在linux中使用哪个系统调用来显示文件夹（或文件名）？ 特别是以“。”开头的文件/文件夹。 （点）

我执行了strace ls -a命令来查看系统调用。对于所有其他属性（inode to permisisons），会出现很多fstat调用。 哪一个实际上给它的名字？

 execve("/bin/ls", ["ls", "-a"], [/* 37 vars */]) = 0 brk(0) = 0x1762000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14025000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=109464, ...}) = 0 mmap(NULL, 109464, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f1c1400a000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20T\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=121936, ...}) = 0 mmap(NULL, 2221680, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c13be6000 mprotect(0x7f1c13c03000, 2093056, PROT_NONE) = 0 mmap(0x7f1c13e02000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c000) = 0x7f1c13e02000 mmap(0x7f1c13e04000, 1648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f1c13e04000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340!\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=31752, ...}) = 0 mmap(NULL, 2128984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c139de000 mprotect(0x7f1c139e5000, 2093056, PROT_NONE) = 0 mmap(0x7f1c13be4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f1c13be4000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libacl.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\33\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=31096, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14009000 mmap(NULL, 2126312, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c137d6000 mprotect(0x7f1c137dd000, 2093056, PROT_NONE) = 0 mmap(0x7f1c139dc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f1c139dc000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\30\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1811128, ...}) = 0 mmap(NULL, 3925208, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c13417000 mprotect(0x7f1c135cc000, 2093056, PROT_NONE) = 0 mmap(0x7f1c137cb000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b4000) = 0x7f1c137cb000 mmap(0x7f1c137d1000, 17624, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f1c137d1000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\r\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=14768, ...}) = 0 mmap(NULL, 2109704, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c13213000 mprotect(0x7f1c13215000, 2097152, PROT_NONE) = 0 mmap(0x7f1c13415000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f1c13415000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200l\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=135366, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14008000 mmap(NULL, 2212904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c12ff6000 mprotect(0x7f1c1300e000, 2093056, PROT_NONE) = 0 mmap(0x7f1c1320d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17000) = 0x7f1c1320d000 mmap(0x7f1c1320f000, 13352, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f1c1320f000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libattr.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\17\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0644, st_size=18552, ...}) = 0 mmap(NULL, 2113736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f1c12df1000 mprotect(0x7f1c12df5000, 2093056, PROT_NONE) = 0 mmap(0x7f1c12ff4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f1c12ff4000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14007000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14005000 arch_prctl(ARCH_SET_FS, 0x7f1c140057c0) = 0 mprotect(0x7f1c137cb000, 16384, PROT_READ) = 0 mprotect(0x7f1c12ff4000, 4096, PROT_READ) = 0 mprotect(0x7f1c1320d000, 4096, PROT_READ) = 0 mprotect(0x7f1c13415000, 4096, PROT_READ) = 0 mprotect(0x7f1c139dc000, 4096, PROT_READ) = 0 mprotect(0x7f1c13be4000, 4096, PROT_READ) = 0 mprotect(0x7f1c13e02000, 4096, PROT_READ) = 0 mprotect(0x618000, 4096, PROT_READ) = 0 mprotect(0x7f1c14027000, 4096, PROT_READ) = 0 munmap(0x7f1c1400a000, 109464) = 0 set_tid_address(0x7f1c14005a90) = 4490 set_robust_list(0x7f1c14005aa0, 0x18) = 0 futex(0x7fff2e09d99c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 7f1c140057c0) = -1 EAGAIN (Resource temporarily unavailable) rt_sigaction(SIGRTMIN, {0x7f1c12ffc750, [], SA_RESTORER|SA_SIGINFO, 0x7f1c13005cb0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {0x7f1c12ffc7e0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f1c13005cb0}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0 statfs("/selinux", {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=238304997, f_bfree=232078639, f_bavail=219973436, f_files=60530688, f_ffree=60120220, f_fsid={-1173666966, -474985328}, f_namelen=255, f_frsize=4096}) = 0 brk(0) = 0x1762000 brk(0x1783000) = 0x1783000 open("/proc/filesystems", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14024000 read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tb"..., 1024) = 328 read(3, "", 1024) = 0 close(3) = 0 munmap(0x7f1c14024000, 4096) = 0 open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=7220736, ...}) = 0 mmap(NULL, 7220736, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f1c1270e000 close(3) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(1, TIOCGWINSZ, {ws_row=41, ws_col=144, ws_xpixel=0, ws_ypixel=0}) = 0 openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 getdents(3, /* 2 entries */, 32768) = 48 getdents(3, /* 0 entries */, 32768) = 0 close(3) = 0 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c14024000 write(1, ". ..\n", 6. .. ) = 6 close(1) = 0 munmap(0x7f1c14024000, 4096) = 0 close(2) = 0 exit_group(0) = ? 

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 openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 getdents(3, /* 2 entries */, 32768) = 48 getdents(3, /* 0 entries */, 32768) = 0 close(3)