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2010-01-26Add xmallocz()Libravatar Ilari Liusvaara1-4/+11
Add routine for allocating NUL-terminated memory block without risking integer overflow in addition of +1 for NUL byte. [jc: with suggestion from Bill Lear] Signed-off-by: Ilari Liusvaara <ilari.liusvaara@elisanet.fi> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-27Convert existing die(..., strerror(errno)) to die_errno()Libravatar Thomas Rast1-4/+4
Change calls to die(..., strerror(errno)) to use the new die_errno(). In the process, also make slight style adjustments: at least state _something_ about the function that failed (instead of just printing the pathname), and put paths in single quotes. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-29Introduce an unlink(2) wrapper which gives warning if unlink failedLibravatar Alex Riesen1-0/+16
This seem to be a very common pattern in the current code. The function prints a generic removal failure message, the file name which failed and readable errno presentation. The function preserves errno and always returns the value unlink(2) returned, but prints no message for ENOENT, as it was the most often filtered out in the code calling unlink. Besides, removing a file is anyway the purpose of calling unlink. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-02-28Merge branch 'jc/maint-1.6.0-pack-directory'Libravatar Junio C Hamano1-1/+2
* jc/maint-1.6.0-pack-directory: Fix odb_mkstemp() on AIX
2009-02-26Fix odb_mkstemp() on AIXLibravatar Mike Ralphson1-1/+2
The AIX mkstemp() modifies its template parameter to an empty string if the call fails. The existing code had already recomputed the template, but too late to be good. See also 6ff6af62, which fixed this problem in a different spot. Signed-off-by: Mike Ralphson <mike@abacus.co.uk> Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-02-25Merge branch 'jc/maint-1.6.0-pack-directory'Libravatar Junio C Hamano1-0/+32
* jc/maint-1.6.0-pack-directory: Make sure objects/pack exists before creating a new pack
2009-02-25Make sure objects/pack exists before creating a new packLibravatar Junio C Hamano1-0/+32
In a repository created with git older than f49fb35 (git-init-db: create "pack" subdirectory under objects, 2005-06-27), objects/pack/ directory is not created upon initialization. It was Ok because subdirectories are created as needed inside directories init-db creates, and back then, packfiles were recent invention. After the said commit, new codepaths started relying on the presense of objects/pack/ directory in the repository. This was exacerbated with 8b4eb6b (Do not perform cross-directory renames when creating packs, 2008-09-22) that moved the location temporary pack files are created from objects/ directory to objects/pack/ directory, because moving temporary to the final location was done carefully with lazy leading directory creation. Many packfile related operations in such an old repository can fail mysteriously because of this. This commit introduces two helper functions to make things work better. - odb_mkstemp() is a specialized version of mkstemp() to refactor the code and teach it to create leading directories as needed; - odb_pack_keep() refactors the code to create a ".keep" file while create leading directories as needed. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-11Wrap inflate and other zlib routines for better error reportingLibravatar Linus Torvalds1-0/+60
R. Tyler Ballance reported a mysterious transient repository corruption; after much digging, it turns out that we were not catching and reporting memory allocation errors from some calls we make to zlib. This one _just_ wraps things; it doesn't do the "retry on low memory error" part, at least not yet. It is an independent issue from the reporting. Some of the errors are expected and passed back to the caller, but we die when zlib reports it failed to allocate memory for now. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-20Move read_in_full() and write_in_full() to wrapper.cLibravatar Junio C Hamano1-0/+38
A few compat/* layer functions call these functions, but we would really want to keep them thin, without depending too much on the libgit proper. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22Shrink the git binary a bit by avoiding unnecessary inline functionsLibravatar Linus Torvalds1-0/+160
So I was looking at the disgusting size of the git binary, and even with the debugging removed, and using -Os instead of -O2, the size of the text section was pretty high. In this day and age I guess almost a megabyte of text isn't really all that surprising, but it still doesn't exactly make me think "lean and mean". With -Os, a surprising amount of text space is wasted on inline functions that end up just being replicated multiple times, and where performance really isn't a valid reason to inline them. In particular, the trivial wrapper functions like "xmalloc()" are used _everywhere_, and making them inline just duplicates the text (and the string we use to 'die()' on failure) unnecessarily. So this just moves them into a "wrapper.c" file, getting rid of a tiny bit of unnecessary bloat. The following numbers are both with "CFLAGS=-Os": Before: [torvalds@woody git]$ size git text data bss dec hex filename 700460 15160 292184 1007804 f60bc git After: [torvalds@woody git]$ size git text data bss dec hex filename 670540 15160 292184 977884 eebdc git so it saves almost 30k of text-space (it actually saves more than that with the default -O2, but I don't think that's necessarily a very relevant number from a "try to shrink git" standpoint). It might conceivably have a performance impact, but none of this should be _that_ performance critical. The real cost is not generally in the wrapper anyway, but in the code it wraps (ie the cost of "xread()" is all in the read itself, not in the trivial wrapping of it). Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>