Annotation of dietlibc/CHANGES, revision 1.120
1.115 fefe 1: 0.11:
2: fix major oops in DNS routines (only with WANT_FULL_RESOLV_CONF enabled).
1.116 fefe 3: fix vsscanf bug (Thanks, David Chappell).
1.117 fefe 4: add floor, ceil and memchr prototypes.
5: add __builtin_expect and expect #defines for gcc versions below 3.0
1.118 fefe 6: cleaner errno vs __errno_location handling
7: add placeholder iconv (iconv_open will always return EINVAL)
8: try to remove kernel 2.4 header dependency in IPv6 sockaddr_in6
9: initialization of getaddrinfo.
1.119 fefe 10: fix vsnprintf %X (printed lower case)
1.120 ! fefe 11: I wrote a new getopt. It appears to actually work (it is POSIX
! 12: compliant, it does not sort argv like the GNU version) and is only
! 13: a little over 300 bytes on x86.
1.115 fefe 14:
1.74 fefe 15: 0.10:
16: update getpagesize.
17: add personality.
1.75 fefe 18: add "%*s" and "%*.*s" support to vsnprintf.
1.76 fefe 19: add putchar (apparently arm-linux-gcc will substitute printf("\n")
20: with putchar('\n') behind your back...?!
1.77 fefe 21: import include/scsi/ from glibc.
1.78 fefe 22: add iopl.
1.80 fefe 23: add execl and sigdelset prototypes.
24: add getopt_long stuff to getopt.h (may compile but won't link).
1.81 fefe 25: add RPC headers (no code yet).
1.82 fefe 26: add mlockall, munlockall
1.83 fefe 27: make "diet gcc foo.c" work.
28: added Sun RPC code and removed as many warnings as possible in a
29: heroic act of self-mutilation.
30: added getproto* and getdtablesize for the RPC cruft :-(
1.84 fefe 31: added getpass. mount from util-linux actually compiles now!
32: fix the sig*set routines. mount actually works now *bg*
33: fix fwrite dividing by zero when trying to fwrite n records of size 0.
1.85 fefe 34: added an initial regex implementation (3500 bytes!!!).
1.87 fefe 35: add llseek and lseek64 with optional lseek fall-back.
1.88 fefe 36: add res_init.
37: add asprintf (ugh, what an ugly function).
1.89 fefe 38: expanded arpa/nameser.h to include backwards compatibility defines
1.90 fefe 39: add ut_name alias to ut_host in struct utmp.
40: add inet_ntop, inet_pton, gethostbyname2.
1.92 fefe 41: add sysinfo, recvmsg, sendmsg.
1.93 fefe 42: add endmntent, getmntent, setmntent.
1.94 fefe 43: fix fnmatch (thanks, Guillaume Cottenceau!)
1.96 fefe 44: add setenv.
45: remove __restrict from mntent.h, add __restrict__ removal alias for
46: older gcc versions in sys/cdefs.h.
47: add rlim_t, sig_atomic_t declarations.
48: add sigsetjmp #define for __sigsetjmp (oops).
49: (Thanks to Chris Siebenmann for these three bug reports)
1.97 fefe 50: add a gruesome hack to printf floating point to accept %f and kludge
51: together support for %.2f. Don't look at the code, please!
1.98 fefe 52: fixed tcsetpgrp (oops, this is embarassing! Thanks, Chris Siebenmann)
1.99 fefe 53: imported fix for entlib by Jeff Garzik.
1.100 fefe 54: add glob implementation from Guillaume Cottenceau (Thanks!!)
55: add libdl fragments from Olaf (Yeah! One step closer to dynamic linking!)
1.101 fefe 56: add REG_ICASE and word start/end handling to my regular expressions.
57: my regular expressions now actually match substrings (i.e. "foobar" to "bar").
1.102 fefe 58: wrap getcwd to comply to man page (the syscall returns the number of
59: bytes, not the buffer)
60: add realpath.
1.103 fefe 61: fix vfprintf.
1.104 fefe 62: fix *scanf %s zero termination.
63: add abs, labs, llabs.
1.105 fefe 64: add <sys/io.h>, ioperm syscall.
65: add flock to <sys/file.h>
1.106 fefe 66: fixes to bsearch and the regular expressions.
1.107 fefe 67: add fake herror.
1.108 fefe 68: add scandir and alphasort.
1.109 fefe 69: add killpg
1.110 fefe 70: implemented a gross hack to make libpthread compile when
71: dietfeatures.h does not define WANT_THREAD_SAFE (it's empty then).
1.111 fefe 72: add getaddrinfo and freeaddrinfo (man, what a fucked up interface!)
1.112 fefe 73: fix sigsuspend (syscall had completely fscked up arguments!)
1.113 fefe 74: RLIM_INFINITY from the kernel is broken. Thanks to Chris Siebenmann
75: for sending a patch.
1.114 fefe 76: add getserv*.
77: add WANT_FULL_RESOLV_CONF so that the DNS routines use "domain" and
78: "search" from resolv.conf.
1.74 fefe 79:
1.73 fefe 80: 0.9:
1.65 fefe 81: fixed initgroups (oops)
1.66 fefe 82: Cleanup appending file open for stdio (thanks, James Antill)
83: imported vfprintf fix from James Antill.
1.67 fefe 84: add fnmatch
85: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 86: Olaf added character classes to *scanf.
1.69 fefe 87: Put object and library files into a separate directory (bin-$ARCH).
88: Add "cross" make target to make all architectures.
89: Add "diet" program and man page.
1.70 fefe 90: Add getgrnam, getgrgid
1.71 fefe 91: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 92: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 93:
1.64 fefe 94: 0.8:
1.34 fefe 95: vsnprintf(0,...) estimated the length of strings with a padding width
96: incorrectly.
1.35 fefe 97: new reboot() from Olaf.
1.36 fefe 98: added prototypes for getsockopt and setsockopt.
1.39 fefe 99: added experimental sem* and shm*
1.38 fefe 100: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 101: added setvbuf (only changes mode, not buffer)
1.41 fefe 102: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
103: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 104: added qsort() and bsearch(). Benchmark on 1000 random ints:
105: glibc: 679414 cycles qsort and 3352 cycles bsearch
106: diet libc: 300010 cycles qsort, 553 cycles bsearch
107: I have no idea why glibc is so slow.
1.43 fefe 108: added __isnan (references by libm.a from glibc).
109: added popen() and pclose(). Now the diet libc can link slsh (from
110: S-Lang!)
1.44 fefe 111: corrected usleep. It was more of an msleep until now.
1.45 fefe 112: corrected __dtostr (it looped when trying to format "0.0").
113: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 114: added ungetc (does it work?)
1.47 fefe 115: added inet_aton (yuck!)
1.50 fefe 116: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 117: added h_errno and __h_errno_location
118: added inet_ntoa
1.49 fefe 119: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 120: add bcopy, index, rindex macros
121: add isgraph and isxdigit
1.52 fefe 122: add strftime (ugh!!!)
1.53 olaf 123: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 124: Jeff Garzik contributed a spec file. I put it in contrib and hope
125: everbody knows what to do with it...
126: Olaf checked in a ton of libpthread stuff.
1.55 fefe 127: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 128: add large file backwards compatibility support (so gzip will run on
129: kernel 2.2 and 2.0)
1.57 fefe 130: added shutdown
1.58 fefe 131: added nice
132: added pseudo-locale support for is* (they are now weak aliases,
133: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
134: overwrite the default is* functions.
1.59 fefe 135: added liblatin1.a
1.60 fefe 136: added tzfile implementation (does it work for anyone else?)
1.61 fefe 137: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 138: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
139: Thanks!
1.63 fefe 140: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 141:
1.21 fefe 142: 0.7.2:
143: added several prototypes to already implemented functions and
144: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 145: added prototypes for process group and dup syscalls. Thanks to
146: Abraham again. He also contributed an implementation for daemon(),
147: an ugly BSD hack. I decided to diversify the lib/ directory a
148: little and now created a libugly/ directory for stuff like system()
149: and daemon() ;-)
150: added libstdio and moved all that stdio crap from lib/ there. The
151: idea is to start separating now what we will separate for shared
152: libraries anyway.
1.26 fefe 153: optimized x86 unified-syscall by Olaf.
1.27 fefe 154: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
155: limits.h instead)
156: added remove.c and enough cruft to limits.h to make it compile lzo,
157: lzop and bzip2.
1.28 fefe 158: added mktime, asctime_r, asctime and ctime (needed for gzip).
159: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 160: format some day (man tzfile, ugh!) :-(
1.29 fefe 161: added unlink prototype to unistd.h.
162: added gmtime and gmtime_r.
1.31 fefe 163: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 164: removed readdir glibc compatibility cruft.
1.31 fefe 165: removed stat glibc compatibility cruft.
1.32 fefe 166: oops, my fread was broken for pipes.
1.33 fefe 167: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 168:
1.9 fefe 169: 0.7.1:
1.11 fefe 170: optimized away the static arrays from __ltostr and __lltostr.
171: optimized away the static arrays (and more!) from strtoul and strtoull.
172: added system (by Olaf).
1.12 fefe 173: added tolower and toupper
1.13 fefe 174: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 175: added clone for mips (by Olaf).
176: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 177: added pause for all (by Olaf).
1.17 fefe 178: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 179: added isupper and islower.
180: added putc and putchar as macros.
1.17 fefe 181: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
182: insightful discussions and patches I partially used for the last three)
1.18 fefe 183: added getpriority and setpriority (also by Abraham)
1.19 fefe 184: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 185: oi, setjmp and longjmp were broken on other platforms, too!
186: Thanks to Sébastien Côté for reporting this.
1.9 fefe 187:
188: 0.7:
1.6 olaf 189: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 190: Initial dynamic loading glue for i386, also by Olaf.
191: We don't have a dynamic loader yet, so this is not yet usable.
192: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
193: vsprintf, writev, all by Olaf.
1.2 fefe 194: imported readdir fix from Guillaume. Mhh, can the kernel interface
195: really be this broken?
1.3 fefe 196: Found a kludgy way to detect whether the kernel includes define struct
197: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
198: not work for you, please tell me!
1.4 fefe 199: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 200: Fixed stdio line buffering. The code was already there but I forgot
201: to mark stdio and stdout as line buffered. This should really be
202: done dynamically using isatty, though.
1.8 fefe 203: Removed superfluous "if (1)" in execvp.c
1.1 cvs 204:
205: 0.6.14:
206: *scanf did not append the 0 byte for %s.
207: added creat and changed creat to call open directly instead of open64.
208: did for fread what 0.6.10 did for fwrite.
209: repaired buffered stdio a little (line buffering is still not
210: supported).
211: [All of these bugs have been reported by Guillaume. Thanks!]
212: added __pure__ to strchr and strrchr in <string.h>
213:
214: 0.6.13:
215: included COPYING to make clear that the diet libc is covered by the
216: GNU General Public License (and _not_ the LGPL). That means that
217: you need to obtain a license from me if you want to use the diet
218: libc in a proprietary program that you want to distribute.
219: The x86 unified syscall swapped arguments #4 and #5 and noone
220: noticed until now! Thanks to Guillaume Cottenceau for reporting
221: this!
222: The malloc had a subtle bug with small allocations that could cause
223: segfault. Guillaume reported it, Olaf fixed it.
224:
225: 0.6.12:
226: added assert, statfs and fstatfs
227: added include/net/if.h so fget compiles again.
228:
229: 0.6.11:
230: added putenv.
231:
232: 0.6.10:
233: fixed fwrite. It returned the number of bytes written, not the number
234: of records. Thanks to Albert D. Cahalan for pointing this out.
235: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
236: added brk and sbrk. harold@nb.com.sg made me do it.
237:
238: 0.6.9:
239: fixed execvp not to return on ENOENT
240: did for {open|read|close|seek|tell}dir what I did for stat before.
241: The glibc compatibility part is currently non-functional.
242: fixed white space handling in sscanf " (" would not match " (".
243: fixed printf to accept 'l' flag.
244: fixed getpwuid (ignored last line)
245:
246: 0.6.8:
247: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
248: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
249: added strlcpy and strlcat from OpenBSD.
250: added stat64, fstat64 and lstat64.
251: added endian.h and made ending of strlen.c endianness-aware
252: added string routines size tweak to dietfeatures.h. Most of the
253: string routines have been unrolled. This is up to three times as
254: fast but creates up to three times larger code. Now you can disable
255: the unrolling.
256: added sendfile.
257: I also added pread. It works on x86 and sparc but not on ppc and mips.
258: I have no idea what's going on. strace disagrees with the kernel.
259: Can anyone help? I asked the Linux kernel mailing list for help, too.
260: added a few aliases of the type __libc_open for open. nm on
261: libpthreads.so indicates that we will need them.
262:
263: 0.6.7:
264: the sources now compile without warnings with -Wall.
265: printf now prints "(null)" when %s is passed NULL. This can be
266: removed with WANT_NULL_PRINTF in dietfeatures.h
267: added vfprintf, execl, ttyname.
268: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
269: __dietfstat so they can use the normal kernel struct stat.
270: stat, lstat and fstat are now C wrappers that convert to the glibc
271: struct stat. So we can avoid that overhead for programs that use
272: dietlibc headers.
273:
274: 0.6.6:
275: changed the Makefiles so you can now set CFLAGS on the command line
276: added memccmp (analogous to memccpy) and strncmp.
277: Olaf fixed another bug in the sparc unified syscall.
278: Paul Clifford contributed a C version of his strlen.S that is much
279: more efficient than the previous strlen on all platforms! It also
280: looks like technology from Roswell. ;-}
281: added a "real" stdio. Well, almost. Please contribute!
282: added dietfeatures.h so you can remove features you don't need.
283: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
284: stdio now works with simple programs and minigzip from libz.
285: stdio uses some major trickery to avoid linking the stdio, stderr and
286: stdout (and reserving space for them) when they are not used.
287:
288: 0.6.5:
289: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
290: most of them bugs in the new header files, but also missing sigset
291: functions.
292: Paul Clifford contributed an assembly strlen.S for ARM and fixed
293: several bugs.
294: Fixed ppc/setjmp and mips/pipe.
295: Olaf contributed a new sparc unified syscall.
296:
297: 0.6.4:
298: declared is* static inline in getservent.
299: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
300: changed strlen to return 0 when passed NULL.
301: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
302: Scientist who actually implemented this without access to a MIPS
303: box, just from reading the architecture manual. And it worked out
304: of the box.
305: started a set of system includes, mainly so that I can use lcc and
306: my alpha-linux cross compiler (which is unable to cross-compile
307: glibc). diet libc can now be compiled without any include files
308: from a normal libc. The includes do declare more than diet libc
309: currently delivers and they are still far from complete for real
310: applications.
311: I will only add assembly versions that are smaller _and_ faster than
312: the C version. Larger routines are only accepted if they are called
313: very often and are substantially faster.
314: added i386 assembly strchr, which is smaller and faster than the old
315: version. It is, however, larger than the version contributed by
316: proton (thanks, anyway).
317: added i386 strlen (31% faster, 14% smaller)
318: "make t" will now create a map file called "mapfile".
319:
320: 0.6.3:
321: added sys_errlist, strerror and perror
322: added isblank
323: added atol
324:
325: 0.6.2:
326: mmap for ARM didn't compile. Thanks, Paul!
327:
328: 0.6.1:
329: split mmap into the architecture specific subdirectories.
330: getenv now copes with environ==NULL, thanks Paul Clifford.
331: Paul also contributed a smaller ARM startup code.
332:
333: 0.6:
334: strcat returned the wrong result. Thanks, Dietz Pröpper.
335: strtod now understands a negative exponent (oops, thanks Bertram Barth)
336: Port to arm-linux-gnu, but on the Netwinder I use for testing the
337: __dtostr does not work (I have no idea why!)
338: The MIPS port now uses (much smaller) non-PIC code. That means that
339: the applications you link against diet libc also have to be compiled
340: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
341: Thanks to Ralf Bächle for helping me with this!
342: I made subdirectories for the architectures and use VPATH to override
343: VPATH so that make finds the source file automatically. That should
344: simplify the sources greatly.
345: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
346: ARM and MIPS now also have setjmp and longjmp
347: "compile" and "load" are now make targets. Use them for djb programs.
348: added contrib/elftrunc.c which will remove unnecessary ELF headers.
349: Again, contributed from Olaf. Great work!
350:
351: 0.5.12:
352: printf also does signed numbers.
353: If you don't use atexit, dietlibc now does not link exit, only _exit.
354: *printf now correctly returns the number of bytes written.
355: Olaf contributed experimental sscanf and vsscanf implementations.
356: If passed NULL as buffer, snprintf will not write anything but still
357: return the number of bytes it would have written.
358: Initial MIPS port! (Oh, the agony!)
359: No setjmp and longjmp support yet! Please contribute!
360: I even implemented unified syscalls for MIPS. Still, MIPS code is
361: almost twice the size of SPARC code. If anyone knows why: please
362: tell me!
363:
364: 0.5.11:
365: I implemented new unified syscalls for x86, sparc and ppc, this time based
366: on .s files and not .c files, and I moved the syscalls into
367: subdirectores to clean the dietlibc sources up a little.
368: A binary consisting of printf("%s is %d\n","olaf",23) is now
369: 2864 bytes on sparc
370: 2488 bytes on intel
371: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
372: to make a few more applications work.
373: Olaf Dreesen also implemented some unified syscall stuff for x86.
374: He discovered that with our unified syscall interface it actually
375: costs <10 bytes total to make all system calls thread safe!
376: I implemented atexit() (can register up to 4 callbacks).
377: I implemented strtod and __dtostr (the opposite). Now we can add
378: floating point support to vsnprintf and sscanf!
379:
380: 0.5.10:
381: I actually saw that I can not only merge the errno handling code of
382: the system calls on x86, I can also merge the rest (including the
383: arguments) except for setting the system call number. All those
384: system calls are now just a jump to a unified system call handler.
385: I got rid of x86openclose again. The savings are substantial:
386: chown from embutils went from 7664 to 7184 bytes!
387: If I'd move the system call wrappers to assembly language, I could
388: even reduce the alignment (does not matter since it's just a jump
389: anyway) and get rid of the "ret" behind each jump (one byte per
390: system call!)
391:
392: 0.5.9:
393: added memchr, strpbrk, strstr, strtol, isspace (hehe)
394: fixed strdup
395: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
396: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
397: (no signed integers, only strings and unsigned integers (but
398: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
399: that code must be wonderful, I don't understand it at all *bg*)
400: Olaf's printf does understand padding like in "%08d" and "%8d" and
401: automatically pads pointers with '0'.
402: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
403: Thanks to proton for inspiration on this.
404: The new x86 start code also does not reference exit any more, thus saving
405: 64 bytes for executables that don't call exit explicitly.
406: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
407: Moved errno and environ to start.S, saving no byte binary size but
408: speeding up compilation and slightly shortening dietlibc.a ;-)
409: For x86: joined open and close into one assembler file, sharing the
410: errno handling. This is a feasibility test and it actually saves a
411: few bytes. I think I will reimplement the _syscall[1-6] macros on
412: all platforms now to share the errno handling code for them.
413:
414: 0.5.8:
415: fixed strchr to be able to look for 0.
416:
417: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
418: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
419: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
420: contributed by Olaf Dreesen)
421:
422: added execvp, getcwd
423:
424: fixed __xmknod
425:
426: Note: can it be that the ftw interface really is so broken that I
427: cannot implement it without having to implement some searching data
428: structure? I included an experimental ftw implementation that will
429: not follow symlinks.
430:
431: 0.5.7:
432: oops, if_nametoindex was broken!
433:
434: 0.5.6:
435: ported to ppc-linux.
436: fixed i386 sigsetjmp (I mistyped the function name)
437: included sigjmp.c
438:
439: 0.5.5:
440: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
441: actually, it wasn't fork that wasn't working for sparc, it was pipe.
442: I fixed it now.
443: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
444: fixed readdir to use getdents and not the intel inline asm
445:
446: 0.5.4:
447: ported to sparclinux (sparc32 only). Beware: does not work yet.
448: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
449:
450: 0.5.3:
451: added tcsetattr and getenv to compile e3
452:
453: 0.5.2:
454: added vhangup, tcgetattr, isatty and memcmp for fgetty
455: (http://www.fefe.de/fgetty/)
456: added localtime from uC-libc.
457:
458: 0.5.1:
459: stat and friends actually work now. Yuck! Another case of
460: translation between kernel and userland. Why can't the kernel
461: people and the libc people simply agree on a standard?
462: removed many unnecessary includes to speed up compilation.
463: added -fomit-frame-pointer and i386 compilation target to reduce code size.
464: inlined socketcall to reduce code size.
465: "load" and "compile" are examples for djb code.
466:
467: 0.5:
468: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
469: each object file is now treated with "strip -x -R .note -R .comment"
470: split each system call into a separate object file
471: added ntohs, htons, alarm, if_indextoname and if_nametoindex
472:
473: 0.4.1:
474: oops, the strchr implementation was wrong. Thanks Jens Laas!
475:
476: 0.4:
477: copied opendir and friends from uC-libc.
478: added getservent and getservby* in gerservent.c
479:
480: 0.3:
481: remove readdir system call
482: added getdents system call
483: added getpwnam/getpwuid implementation in getpwnam.c
484: added a few string functions (in str*.c)
485:
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