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serenity/Libraries/LibC
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Sergey Bugaev f03e452085 LibC: Sync file position when dropping read ahead buffer 
When we flush a FILE, we behave differently depending on whether we reading from
the file or writing to it:

* If we're writing, we actually write out the buffered data.
* If we're reading, we just drop the buffered (read ahead) data.

After flushing, there should be no additional buffered state stdio keeps about a
FILE, compared to what is true about the underlying file. This includes file
position (offset). When flushing writes, this is taken care of automatically,
but dropping the buffer is not enough to achieve that when reading. This commit
fixes that by seeking back explicitly in that case.

One way the problem manifested itself was upon fseek(SEEK_CUR) calls, as the
position of the underlying file was oftentimes different to the logical position
of the FILE. Since FILE::seek() already calls FILE::flush() prior to actually
modifying the position, fixing FILE::flush() to sync the positions is enough to
fix that issue.
2020-05-22 18:58:36 +02:00
..
arpa LibC: Add inet_aton, based on inet_pton 2020-05-11 09:50:42 +02:00
bits LibC: Rewrite stdio 2020-05-20 08:31:31 +02:00
net Userland: ifconfig can change the IP address of the default gateway 2020-03-15 19:09:31 +01:00
netinet LibC: Add minimal <netinet/ip.h> 2020-05-11 09:50:42 +02:00
sys Kernel + LibC: Handle running processes in do_waitid() 2020-05-17 11:58:08 +02:00
alloca.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
assert.cpp LibC: Simplify ASSERT() to reduce code size 2020-04-13 12:27:05 +02:00
assert.h LibC: Hint the compiler that assertions rarely fail 2020-04-30 11:30:27 +02:00
byteswap.h Meta: Add missing copyright headers 2020-04-06 11:09:01 +02:00
CMakeLists.txt Revert "LibC: Implement Itanium C++ ABI for static variable guards" 2020-05-20 16:24:26 +02:00
crt0.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
crti.S Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
crtn.S Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
ctype.cpp Revert "LibC: Implement isblank()" 2020-02-16 10:47:54 +01:00
ctype.h LibC: Don't let ctype isfoo() helpers access array out of bounds 2020-05-17 22:35:25 +02:00
cxxabi.cpp Revert "LibC: Implement Itanium C++ ABI for static variable guards" 2020-05-20 16:24:26 +02:00
dirent.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
dirent.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
dlfcn.cpp LibELF: Move ELF classes into namespace ELF 2020-04-11 22:41:05 +02:00
dlfcn.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
endian.h LibC: Fix big endian definitions 2020-02-19 16:08:28 +01:00
errno.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
errno_numbers.h Kernel+LibC: Remove ESUCCESS 2020-04-10 13:09:35 +02:00
fcntl.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
fcntl.h Kernel+LibC: Switch isatty() to use a fcntl() 2020-05-20 08:31:31 +02:00
fd_set.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
float.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
getopt.cpp LibC: Ensure getopt error messages end with a newline 2019-09-17 21:56:42 +02:00
getopt.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
grp.cpp LibC: Fix truncated strncpy() in /etc/group parsing 2020-04-13 12:27:05 +02:00
grp.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
iconv.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
inttypes.h LibC: Add some missing macros to inttypes.h 2020-02-20 06:51:16 +01:00
ioctl.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
libcinit.cpp LibWeb: Move everything into the Web namespace 2020-03-07 10:27:02 +01:00
libgen.cpp Meta: Claim copyright for files created by me 2020-01-24 15:15:16 +01:00
libgen.h Meta: Claim copyright for files created by me 2020-01-24 15:15:16 +01:00
limits.h LibC: Use more flexible digit parsing code, deduplicate 2020-05-11 10:52:24 +02:00
locale.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
locale.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
malloc.cpp Revert "AK+LibC: Move non-placement new/delete into LibC" 2020-05-20 16:24:26 +02:00
mallocdefs.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
memory.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
mman.cpp Kernel+LibC: Add minherit() and MAP_INHERIT_ZERO 2020-04-12 20:22:26 +02:00
mman.h Kernel+LibC: Add minherit() and MAP_INHERIT_ZERO 2020-04-12 20:22:26 +02:00
mntent.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
mntent.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
netdb.cpp LibC: getprotoent() family of functions 2020-04-18 10:11:55 +02:00
netdb.h LibC: getprotoent() family of functions 2020-04-18 10:11:55 +02:00
poll.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
poll.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
pwd.cpp LibC: Fix strncpy() overflow in /etc/passwd parsing 2020-04-13 12:27:05 +02:00
pwd.h LibC: Implement putpwent() 2020-02-02 10:58:45 +01:00
qsort.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
scanf.cpp LibC: Some build fixes for strange platforms 2019-09-29 21:02:13 +02:00
sched.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
sched.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
serenity.cpp Kernel: Add sys$get_stack_bounds() for finding the stack base & size 2020-03-16 19:06:33 +01:00
serenity.h Kernel: Add sys$get_stack_bounds() for finding the stack base & size 2020-03-16 19:06:33 +01:00
setjmp.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
setjmp.S Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
signal.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
signal.h Kernel+LibC: Add some Unix signal types & definitions 2020-02-05 18:14:37 +01:00
signal_numbers.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
stat.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
stdarg.h Kernel: Absorb LibBareMetal back into the kernel 2020-05-16 12:00:04 +02:00
stdbool.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
stddef.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
stdint.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
stdio.cpp LibC: Sync file position when dropping read ahead buffer 2020-05-22 18:58:36 +02:00
stdio.h LibC: Move FILE definition to bits/FILE.h 2020-02-02 10:58:45 +01:00
stdlib.cpp LibC: Always assign the offset pointer to endptr in strto{u,}ll() 2020-05-12 13:28:57 +02:00
stdlib.h LibC: Add posix_openpt(), grantpt() and unlockpt() 2020-02-05 21:17:41 +01:00
string.cpp LibC: Implement strchrnul() 2020-02-22 21:36:54 +01:00
string.h LibC: Implement strchrnul() 2020-02-22 21:36:54 +01:00
strings.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
strings.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
syslog.cpp AK: Add a forward declaration header 2020-02-14 23:31:18 +01:00
syslog.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
termcap.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
termcap.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
termios.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
termios.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
time.cpp Kernel: Remove now-unused KernelInfoPage.h 2020-05-16 11:34:54 +02:00
time.h LibC: Add new syscall to allow changing the system date 2020-03-19 15:48:00 +01:00
times.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
ulimit.cpp LibC: Log calls to getrusage 2020-05-07 23:32:11 +02:00
ulimit.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
unistd.cpp Kernel+LibC: Switch isatty() to use a fcntl() 2020-05-20 08:31:31 +02:00
unistd.h Kernel: Remove sys$getdtablesize() 2020-05-16 11:34:01 +02:00
utime.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
utime.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
utmp.h LibC: Add missing <sys/time.h> include in <utmp.h> 2020-05-11 09:50:42 +02:00
utsname.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
wchar.cpp Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
wchar.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00