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