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2011-04-17clean up handling of thread/nothread mode, lockingRich Felker-5/+1
2011-04-17debloat: use __syscall instead of syscall where possibleRich Felker-5/+5
don't waste time (and significant code size due to function call overhead!) setting errno when the result of a syscall does not matter or when it can't fail.
2011-04-15avoid setting errno when checking for ttyRich Felker-2/+2
setting errno here is completely valid, but some programs, notably busybox printf, assume that errno will not be set during output and treat this as an error condition. in any case, skipping it slightly reduces code size and saves time.
2011-04-14make tmpfile slightly more efficient (use unlink syscall instead of remove)Rich Felker-1/+1
2011-04-12fix printf("%.9g", 1.1) and similar not dropping trailing zerosRich Felker-1/+3
2011-04-11fix fputwc return valueRich Felker-1/+1
2011-04-09work around a nasty bug in linux readv syscallRich Felker-3/+4
according to posix, readv "shall be equivalent to read(), except..." that it places the data into the buffers specified by the iov array. however on linux, when reading from a terminal, each iov element behaves almost like a separate read. this means that if the first iov exactly satisfied the request (e.g. a length-one read of '\n') and the second iov is nonzero length, the syscall will block again after getting the blank line from the terminal until another line is read. simply put, entering a single blank line becomes impossible. the solution, fortunately, is simple. whenever the buffer size is nonzero, reduce the length of the requested read by one byte and let the last byte go through the buffer. this way, readv will already be in the second (and last) iov, and won't re-block on the second iov.
2011-04-05add more legacy functions: setlinebuf and setbufferRich Felker-1/+15
2011-04-05fix overflow in printf %N$ argument handlingRich Felker-2/+2
2011-04-05fix various floating point rounding and formatting errors in *printfRich Felker-17/+25
2011-04-04simplify vdprintf implementation greatly based on recent vfprintf changesRich Felker-5/+2
since vfprintf will provide a temporary buffer in the case where the target FILE has a zero buffer size, don't bother setting up a real buffer for vdprintf. this also allows us to skip the call to fflush since we know everything will be written out before vfprintf returns.
2011-04-04use a local temp buffer for unbuffered streams in vfprintfRich Felker-0/+14
this change makes it so most calls to fprintf(stderr, ...) will result in a single writev syscall, as opposed to roughly 2*N syscalls (and possibly more) where N is the number of format specifiers. in principle we could use a much larger buffer, but it's best not to increase the stack requirements too much. most messages are under 80 chars.
2011-04-02don't disable seeking after first seek failureRich Felker-8/+0
this could cause problems if the application uses dup2(fd,fileno(f)) to redirect, and the old fd was not seekable but the new fd is.
2011-04-02apparently fseek should not set the error flag on failed seekRich Felker-4/+1
2011-03-29fix tempnam name generation, and a small bug in tmpnam on retry limitRich Felker-21/+20
2011-03-29make tmpfile fail after exceeding max tries.Rich Felker-2/+6
2011-03-29fix tmpnam to generate better names, not depend on non-ISO-C symbolsRich Felker-25/+17
2011-03-29fix messed-up errno if remove fails for a non-EISDIR reasonRich Felker-2/+2
2011-03-29learned something new - remove is supposed to support directories on POSIXRich Felker-1/+3
2011-03-28revert some more spin optimizations that turned out to be pessimizationsRich Felker-1/+1
2011-03-28fix getc - the classic error of trying to store EOF+0-255 in a char type..Rich Felker-3/+3
2011-03-28major stdio overhaul, using readv/writev, plus other changesRich Felker-268/+235
the biggest change in this commit is that stdio now uses readv to fill the caller's buffer and the FILE buffer with a single syscall, and likewise writev to flush the FILE buffer and write out the caller's buffer in a single syscall. making this change required fundamental architectural changes to stdio, so i also made a number of other improvements in the process: - the implementation no longer assumes that further io will fail following errors, and no longer blocks io when the error flag is set (though the latter could easily be changed back if desired) - unbuffered mode is no longer implemented as a one-byte buffer. as a consequence, scanf unreading has to use ungetc, to the unget buffer has been enlarged to hold at least 2 wide characters. - the FILE structure has been rearranged to maintain the locations of the fields that might be used in glibc getc/putc type macros, while shrinking the structure to save some space. - error cases for fflush, fseek, etc. should be more correct. - library-internal macros are used for getc_unlocked and putc_unlocked now, eliminating some ugly code duplication. __uflow and __overflow are no longer used anywhere but these macros. switch to read or write mode is also separated so the code can be better shared, e.g. with ungetc. - lots of other small things.
2011-03-25fix all implicit conversion between signed/unsigned pointersRich Felker-8/+8
sadly the C language does not specify any such implicit conversion, so this is not a matter of just fixing warnings (as gcc treats it) but actual errors. i would like to revisit a number of these changes and possibly revise the types used to reduce the number of casts required.
2011-03-24simplify and optimize FILE lock handlingRich Felker-11/+12
2011-03-24fix non-atomicity of putsRich Felker-1/+5
2011-03-20global cleanup to use the new syscall interfaceRich Felker-19/+19
2011-03-18implement [v]swprintfRich Felker-0/+60
2011-03-17implement wprintf family of functionsRich Felker-0/+387
this implementation is extremely ugly and inefficient, but it avoids a good deal of code duplication and bloat. it may be cleaned up later to eliminate the remaining code duplication and some of the warts, but i don't really care about its performance. note that swprintf is not yet implemented.
2011-03-16optimize file locking: avoid cache-polluting writes to global storageRich Felker-3/+5
2011-03-14partially-written draft of fmemopen, still in #if 0Rich Felker-3/+48
2011-03-12implement flockfile api, rework stdio lockingRich Felker-3/+54
2011-02-22rewind must clear the error indicator in addition to seekingRich Felker-2/+5
2011-02-20avoid referencing address of extern function from vdprintfRich Felker-1/+6
this change is in preparation for upcoming PIC/shared library support. the intent is to avoid going through the GOT, mainly so that dprintf is operable immediately, prior to processing of relocations. having dprintf accessible from the dynamic linker will make writing and debugging the dynamic linker much easier.
2011-02-20cleanup asprintf stuffRich Felker-2/+2
2011-02-20fix %n specifier, again. this time it was storing the wrong value.Rich Felker-7/+7
2011-02-16fix printf %n specifier - missing breaks had it clobbering memoryRich Felker-7/+7
2011-02-14fix some pointer signedness issues (this was invalid C)Rich Felker-3/+3
2011-02-13cleaning up syscalls in preparation for x86_64 portRich Felker-1/+7
- hide all the legacy xxxxxx32 name cruft in syscall.h so the actual source files can be clean and uniform across all archs. - cleanup llseek/lseek and mmap2/mmap handling for 32/64 bit systems - alternate implementation for nice if the target lacks nice syscall
2011-02-12initial check-in, version 0.5.0v0.5.0Rich Felker-0/+2857