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* pre-POSIX.1-2001 systems do not have <sys/select.h>Robert Schiele2008-01-241-0/+2
| | | | | | | | | | | | | | | | | | | POSIX.1-2001 has declaration of select(2) in <sys/select.h>, but in the previous version of SUS, it was declared in <sys/time.h> (which is already included in git-compat-util.h). This introduces NO_SYS_SELECT_H macro in the Makefile to be set on older systems, to skip inclusion of <sys/select.h> that does not exist on them. We could check _POSIX_VERSION with 200112L and do this automatically, but earlier it was reported that the approach does not work well on some vintage of HP-UX. Other systems may get _POSIX_VERSION itself wrong. At least for now, this manual configuration is safer. Signed-off-by: Robert Schiele <rschiele@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Uninline prefixcmp()Junio C Hamano2008-01-031-9/+2
| | | | | | | | | Now the routine is an open-coded loop that avoids an extra strlen() in the previous implementation, it got a bit too big to be inlined. Uninlining it makes code footprint smaller but the result still retains the avoidance of strlen() cost. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Optimize prefixcmp()Johannes Schindelin2008-01-021-1/+5
| | | | | | | | | | | Certain codepaths (notably "git log --pretty=format...") use prefixcmp() extensively, with very short prefixes. In those cases, calling strlen() is a wasteful operation, so avoid it. Initial patch by Marco Costalba. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'js/mingw-fallouts'Junio C Hamano2007-11-241-0/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * js/mingw-fallouts: fetch-pack: Prepare for a side-band demultiplexer in a thread. rehabilitate some t5302 tests on 32-bit off_t machines Allow ETC_GITCONFIG to be a relative path. Introduce git_etc_gitconfig() that encapsulates access of ETC_GITCONFIG. Allow a relative builtin template directory. Close files opened by lock_file() before unlinking. builtin run_command: do not exit with -1. Move #include <sys/select.h> and <sys/ioctl.h> to git-compat-util.h. Use is_absolute_path() in sha1_file.c. Skip t3902-quoted.sh if the file system does not support funny names. t5302-pack-index: Skip tests of 64-bit offsets if necessary. t7501-commit.sh: Not all seds understand option -i t5300-pack-object.sh: Split the big verify-pack test into smaller parts.
| * Move #include <sys/select.h> and <sys/ioctl.h> to git-compat-util.h.Johannes Sixt2007-11-141-0/+2
| | | | | | | | | | | | | | ... since all system headers are pulled in via git-compat-util.h Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | git-compat-util.h: auto-adjust to compiler support of FLEX_ARRAY a bit betterJunio C Hamano2007-11-201-4/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | When declaring a structure with a flexible array member, instead of defaulting to the c99 syntax for non-gnu compilers (which burned people with older compilers), default to the traditional and more portable "member[1]; /* more */" syntax. At the same time, other c99 compilers should be able to take advantage of the modern syntax to flexible array members without being gcc. Check __STDC_VERSION__ for that. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Merge branch 'ph/diffopts'Junio C Hamano2007-11-181-0/+1
|\ \ | |/ |/| | | | | | | | | | | | | | | * ph/diffopts: Reorder diff_opt_parse options more logically per topics. Make the diff_options bitfields be an unsigned with explicit masks. Use OPT_BIT in builtin-pack-refs Use OPT_BIT in builtin-for-each-ref Use OPT_SET_INT and OPT_BIT in builtin-branch parse-options new features.
| * parse-options new features.Pierre Habouzit2007-11-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | options flags: ~~~~~~~~~~~~~ PARSE_OPT_NONEG allow the caller to disallow the negated option to exists. option types: ~~~~~~~~~~~~ OPTION_BIT: ORs (or NANDs) a mask. OPTION_SET_INT: force the value to be set to this integer. OPTION_SET_PTR: force the value to be set to this pointer. helper: ~~~~~~ HAS_MULTI_BITS (in git-compat-util.h) is a bit-hack to check if an unsigned integer has more than one bit set, useful to check if conflicting options have been used. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Fix preprocessor logic that determines the availablity of strchrnul().Johannes Sixt2007-11-121-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | Apart from the error in the condition (&& should actually be ||), the construct #if !defined(A) || !A leads to a syntax error in the C preprocessor if A is indeed not defined. Tested-by: David Symonds <dsymonds@gmail.com> Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Simplify strchrnul() compat codeAndreas Ericsson2007-11-111-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | strchrnul() was introduced in glibc in April 1999 and included in glibc-2.1. Checking for that version means the majority of all git users would get to use the optimized version in glibc. Of the remaining few some might get to use a slightly slower version than necessary but probably not slower than what we have today. Unfortunately, __GLIBC_PREREQ() macro was not available in glibc 2.1.1 which was short lived but already supported strchrnul(). Odd minority users of that library needs to live with our compatibility inline version. Rediffed-against-next-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Add strchrnul()René Scharfe2007-11-091-0/+5
|/ | | | | | | | | | As suggested by Pierre Habouzit, add strchrnul(). It's a useful GNU extension and can simplify string parser code. There are several places in git that can be converted to strchrnul(); as a trivial example, this patch introduces its usage to builtin-fetch--tool.c. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* revert/cherry-pick: work on merge commits as wellJunio C Hamano2007-10-261-0/+13
| | | | | | | | | | | | | | | | | | | | | | Usually you cannot revert a merge because you do not know which side of the merge should be considered the mainline (iow, what change to reverse). With this patch, cherry-pick and revert learn -m (--mainline) option that lets you specify the parent number (starting from 1) of the mainline, so that you can: git revert -m 1 $merge to reverse the changes introduced by the $merge commit relative to its first parent, and: git cherry-pick -m 2 $merge to replay the changes introduced by the $merge commit relative to its second parent. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Define compat version of mkdtemp for systems lacking itShawn O. Pearce2007-10-201-0/+5
| | | | | | | | | | Solaris 9 doesn't have mkdtemp() so we need to emulate it for the rsync transport implementation. Since Solaris 9 is lacking this function we can also reasonably assume it is not available on Solaris 8 either. The new Makfile definition NO_MKDTEMP can be set to enable the git compat version. Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
* Add xmemdupz() that duplicates a block of memory, and NUL terminates it.Pierre Habouzit2007-09-181-8/+9
| | | | | | | | | | | | | | | | | | | A lot of places in git's code use code like: char *res; len = ... find length of an interesting segment in src ...; res = xmalloc(len + 1); memcpy(res, src, len); res[len] = '\0'; return res; A new function xmemdupz() captures the allocation, copy and NUL termination. Existing xstrndup() is reimplemented in terms of this new function. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* add memmem()René Scharfe2007-09-061-0/+6
| | | | | | | | | | | | | | | | | | memmem() is a nice GNU extension for searching a length limited string in another one. This compat version is based on the version found in glibc 2.2 (GPL 2); I only removed the optimization of checking the first char by hand, and generally tried to keep the code simple. We can add it back if memcmp shows up high in a profile, but for now I prefer to keep it (almost trivially) simple. Since I don't really know which platforms beside those with a glibc have their own memmem(), I used a heuristic: if NO_STRCASESTR is set, then NO_MEMMEM is set, too. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Introduces xmkstemp()Luiz Fernando N. Capitulino2007-08-141-0/+10
| | | | | | | | This is a wrapper for mkstemp() that performs error checking and calls die() when an error occur. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* git-log: detect dup and fdopen failureJim Meyering2007-06-271-0/+16
| | | | | | | | | | This defines xdup() and xfdopen() in git-compat-util.h to give us error-catching variants of them without cluttering the code too much. Signed-off-by: Jim Meyering <jim@meyering.net> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Add a local implementation of hstrerror for the system which do not have itAlex Riesen2007-06-151-0/+5
| | | | | | | | | | The function converts the value of h_errno (last error of name resolver library, see netdb.h). One of systems which supposedly do not have the function is SunOS. POSIX does not mandate its presence. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'maint'Junio C Hamano2007-05-161-0/+3
|\ | | | | | | | | | | | | | | | | * maint: format-patch: add MIME-Version header when we add content-type. Fixed link in user-manual import-tars: Use the "Link indicator" to identify directories git name-rev writes beyond the end of malloc() with large generations Documentation/branch: fix small typo in -D example
| * git name-rev writes beyond the end of malloc() with large generationsAndy Whitcroft2007-05-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using git name-rev on my kernel tree I triggered a malloc() corruption warning from glibc. apw@pinky$ git log --pretty=one $N/base.. | git name-rev --stdin *** glibc detected *** malloc(): memory corruption: 0x0bff8950 *** Aborted This comes from name_rev() which is building the name of the revision in a malloc'd string, which it sprintf's into: char *new_name = xmalloc(len + 8); [...] sprintf(new_name, "%.*s~%d^%d", len, tip_name, generation, parent_number); This allocation is only sufficient if the generation number is less than 5 digits, in my case generation was 13432. In reality parent_number can be up to 16 so that also can require two digits, reducing us to 3 digits before we are at risk of blowing this allocation. This patch introduces a decimal_length() which approximates the number of digits a type may hold, it produces the following: Type Longest Value Len Est ---- ------------- --- --- unsigned char 256 3 4 unsigned short 65536 5 6 unsigned long 4294967296 10 11 unsigned long long 18446744073709551616 20 21 char -128 4 4 short -32768 6 6 long -2147483648 11 11 long long -9223372036854775808 20 21 This is then used to size the new_name. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* | Merge branch 'maint'Junio C Hamano2007-05-031-0/+13
|\ \ | |/ | | | | | | | | | | | | | | | | | | * maint: gitweb: use decode_utf8 directly posix compatibility for t4200 Document 'opendiff' value in config.txt and git-mergetool.txt Allow PERL_PATH="/usr/bin/env perl" Make xstrndup common diff.c: fix "size cache" handling. http-fetch: Disable use of curl multi support for libcurl < 7.16.
| * Make xstrndup commonDaniel Barkalow2007-05-031-0/+13
| | | | | | | | | | | | | | | | | | | | This also improves the implementation to match how strndup is specified (by GNU): if the length given is longer than the string, only the string's length is allocated and copied, but the string need not be null-terminated if it is at least as long as the given length. Signed-off-by: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* | Merge branch 'maint'Junio C Hamano2007-04-251-6/+6
|\ \ | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * maint: Start preparing for 1.5.1.3 Sanitize @to recipients. git-svn: Ignore usernames in URLs in find_by_url Document --dry-run and envelope-sender for git-send-email. Allow users to optionally specify their envelope sender. Ensure clean addresses are always used with Net::SMTP Validate @recipients before using it for sendmail and Net::SMTP. Perform correct quoting of recipient names. Change the scope of the $cc variable as it is not needed outside of send_message. Debugging cleanup improvements Prefix Dry- to the message status to denote dry-runs. Document --dry-run parameter to send-email. git-svn: Don't rely on $_ after making a function call Fix handle leak in write_tree Actually handle some-low memory conditions Conflicts: RelNotes git-send-email.perl
| * Actually handle some-low memory conditionsShawn O. Pearce2007-04-251-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tim Ansell discovered his Debian server didn't permit git-daemon to use as much memory as it needed to handle cloning a project with a 128 MiB packfile. Filtering the strace provided by Tim of the rev-list child showed this gem of a sequence: open("./objects/pack/pack-*.pack", O_RDONLY|O_LARGEFILE <unfinished ...> <... open resumed> ) = 5 OK, so the packfile is fd 5... mmap2(NULL, 33554432, PROT_READ, MAP_PRIVATE, 5, 0 <unfinished ...> <... mmap2 resumed> ) = 0xb5e2d000 and we mapped one 32 MiB window from it at position 0... mmap2(NULL, 31020635, PROT_READ, MAP_PRIVATE, 5, 0x6000 <unfinished ...> <... mmap2 resumed> ) = -1 ENOMEM (Cannot allocate memory) And we asked for another window further into the file. But got denied. In Tim's case this was due to a resource limit on the git-daemon process, and its children. Now where are we in the code? We're down inside use_pack(), after we have called unuse_one_window() enough times to make sure we stay within our allowed maximum window size. However since we didn't unmap the prior window at 0xb5e2d000 we aren't exceeding the current limit (which probably was just the defaults). But we're actually down inside xmmap()... So we release the window we do have (by calling release_pack_memory), assuming there is some memory pressure... munmap(0xb5e2d000, 33554432 <unfinished ...> <... munmap resumed> ) = 0 close(5 <unfinished ...> <... close resumed> ) = 0 And that was the last window in this packfile. So we closed it. Way to go us. Our xmmap did not expect release_pack_memory to close the fd its about to map... mmap2(NULL, 31020635, PROT_READ, MAP_PRIVATE, 5, 0x6000 <unfinished ...> <... mmap2 resumed> ) = -1 EBADF (Bad file descriptor) And so the Linux kernel happily tells us f' off. write(2, "fatal: ", 7 <unfinished ...> <... write resumed> ) = 7 write(2, "Out of memory? mmap failed: Bad "..., 47 <unfinished ...> <... write resumed> ) = 47 And we report the bad file descriptor error, and not the ENOMEM, and die, claiming we are out of memory. But actually that mmap should have succeeded, as we had enough memory for that window, seeing as how we released the prior one. Originally when I developed the sliding window mmap feature I had this exact same bug in fast-import, and I dealt with it by handing in the struct packed_git* we want to open the new window for, as the caller wasn't prepared to reopen the packfile if unuse_one_window closed it. The same is true here from xmmap, but the caller doesn't have the struct packed_git* handy. So I'm using the file descriptor instead to perform the same test. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
| * sscanf/strtoul: parse integers robustlyJim Meyering2007-04-141-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | * builtin-grep.c (strtoul_ui): Move function definition from here, to... * git-compat-util.h (strtoul_ui): ...here, with an added "base" parameter. * builtin-grep.c (cmd_grep): Update use of strtoul_ui to include base, "10". * builtin-update-index.c (read_index_info): Diagnose an invalid mode integer that is out of range or merely larger than INT_MAX. (cmd_update_index): Use strtoul_ui, not sscanf. * convert-objects.c (write_subdirectory): Likewise. Signed-off-by: Jim Meyering <jim@meyering.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
* | Merge branch 'np/pack'Junio C Hamano2007-04-211-0/+8
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * np/pack: (27 commits) document --index-version for index-pack and pack-objects pack-objects: remove obsolete comments pack-objects: better check_object() performances add get_size_from_delta() pack-objects: make in_pack_header_size a variable of its own pack-objects: get rid of create_final_object_list() pack-objects: get rid of reuse_cached_pack pack-objects: clean up list sorting pack-objects: rework check_delta_limit usage pack-objects: equal objects in size should delta against newer objects pack-objects: optimize preferred base handling a bit clean up add_object_entry() tests for various pack index features use test-genrandom in tests instead of /dev/urandom simple random data generator for tests validate reused pack data with CRC when possible allow forcing index v2 and 64-bit offset treshold pack-redundant.c: learn about index v2 show-index.c: learn about index v2 sha1_file.c: learn about index version 2 ...
| * | make overflow test on delta base offset work regardless of variable sizeNicolas Pitre2007-04-101-0/+8
| |/ | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces the MSB() macro to obtain the desired number of most significant bits from a given variable independently of the variable type. It is then used to better implement the overflow test on the OBJ_OFS_DELTA base offset variable with the property of always working correctly regardless of the type/size of that variable. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* | sscanf/strtoul: parse integers robustlyJim Meyering2007-04-111-0/+13
|/ | | | | | | | | | | | | * builtin-grep.c (strtoul_ui): Move function definition from here, to... * git-compat-util.h (strtoul_ui): ...here, with an added "base" parameter. * builtin-grep.c (cmd_grep): Update use of strtoul_ui to include base, "10". * builtin-update-index.c (read_index_info): Diagnose an invalid mode integer that is out of range or merely larger than INT_MAX. (cmd_update_index): Use strtoul_ui, not sscanf. * convert-objects.c (write_subdirectory): Likewise. Signed-off-by: Jim Meyering <jim@meyering.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Rename warn() to warning() to fix symbol conflicts on BSD and Mac OSTheodore Ts'o2007-03-311-1/+1
| | | | | | | | | | | | | | | | | This fixes a problem reported by Randal Schwartz: >I finally tracked down all the (albeit inconsequential) errors I was getting >on both OpenBSD and OSX. It's the warn() function in usage.c. There's >warn(3) in BSD-style distros. It'd take a "great rename" to change it, but if >someone with better C skills than I have could do that, my linker and I would >appreciate it. It was annoying to me, too, when I was doing some mergetool testing on Mac OS X, so here's a fix. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: "Randal L. Schwartz" <merlyn@stonehenge.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Cast 64 bit off_t to 32 bit size_tShawn O. Pearce2007-03-071-0/+5
| | | | | | | | | | | | | | | | | | Some systems have sizeof(off_t) == 8 while sizeof(size_t) == 4. This implies that we are able to access and work on files whose maximum length is around 2^63-1 bytes, but we can only malloc or mmap somewhat less than 2^32-1 bytes of memory. On such a system an implicit conversion of off_t to size_t can cause the size_t to wrap, resulting in unexpected and exciting behavior. Right now we are working around all gcc warnings generated by the -Wshorten-64-to-32 option by passing the off_t through xsize_t(). In the future we should make xsize_t on such problematic platforms detect the wrapping and die if such a file is accessed. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Use off_t when we really mean a file offset.Shawn O. Pearce2007-03-071-0/+4
| | | | | | | | | | | | | | | Not all platforms have declared 'unsigned long' to be a 64 bit value, but we want to support a 64 bit packfile (or close enough anyway) in the near future as some projects are getting large enough that their packed size exceeds 4 GiB. By using off_t, the POSIX type that is declared to mean an offset within a file, we support whatever maximum file size the underlying operating system will handle. For most modern systems this is up around 2^60 or higher. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Merge branch 'maint'Junio C Hamano2007-03-031-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | * maint: Unset NO_C99_FORMAT on Cygwin. Fix a "pointer type missmatch" warning. Fix some "comparison is always true/false" warnings. Fix an "implicit function definition" warning. Fix a "label defined but unreferenced" warning. Document the config variable format.suffix git-merge: fail correctly when we cannot fast forward. builtin-archive: use RUN_SETUP Fix git-gc usage note
| * Fix an "implicit function definition" warning.Ramsay Jones2007-03-031-0/+6
| | | | | | | | | | | | | | | | | | The function at issue being initgroups() from the <grp.h> header file. On Cygwin, setting _XOPEN_SOURCE suppresses the definition of initgroups(), which causes the warning while compiling daemon.c. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <junkio@cox.net>
* | Support for large files on 32bit systems.Martin Waitz2007-02-201-0/+2
| | | | | | | | | | | | | | | | Glibc uses the same size for int and off_t by default. In order to support large pack sizes (>2GB) we force Glibc to a 64bit off_t. Signed-off-by: Martin Waitz <tali@admingilde.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* | Add prefixcmp()Junio C Hamano2007-02-201-0/+5
|/ | | | | | We have too many strncmp(a, b, strlen(b)). Signed-off-by: Junio C Hamano <junkio@cox.net>
* Add a compat/strtoumax.c for Solaris 8.Jason Riedy2007-02-191-0/+5
| | | | | | | | | | | | | | | Solaris 8 was pre-c99, and they weren't willing to commit to the strtoumax definition according to /usr/include/inttypes.h. This adds NO_STRTOUMAX and NO_STRTOULL for ancient systems. If NO_STRTOUMAX is defined, the routine in compat/strtoumax.c will be used instead. That routine passes its arguments to strtoull unless NO_STRTOULL is defined. If NO_STRTOULL, then the routine uses strtoul (unsigned long). Signed-off-by: Jason Riedy <ejr@cs.berkeley.edu> Acked-by: Shawn O Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Make sure packedgitwindowsize is multiple of (pagesize * 2)Junio C Hamano2007-02-141-0/+3
| | | | | | The next patch depends on this. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Use inttypes.h rather than stdint.h.Jason Riedy2007-01-261-1/+1
| | | | | | | | | Older Solaris machines lack stdint.h but have inttypes.h. The standard has inttypes.h including stdint.h, so at worst this pollutes the namespace a bit. Signed-off-by: Jason Riedy <ejr@cs.berkeley.edu> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Use fixed-size integers for the on-disk pack structure.Simon 'corecode' Schubert2007-01-181-0/+1
| | | | | | | | | | Plain integer types without a fixed size can vary between platforms. Even though all common platforms use 32-bit ints, there is no guarantee that this won't change at some point. Furthermore, specifying an integer type with explicit size makes the definition of structures more obvious. Signed-off-by: Simon 'corecode' Schubert <corecode@fs.ei.tum.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Set _ALL_SOURCE for AIX, but avoid its struct list.Jason Riedy2007-01-151-2/+5
| | | | | | | | AIX 5.3 seems to need _ALL_SOURCE for struct addrinfo, but that introduces a struct list in grp.h. Signed-off-by: Jason Riedy <ejr@cs.berkeley.edu> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Better error messages for corrupt databasesLinus Torvalds2007-01-111-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes another problem that Andy's case showed: git-fsck-objects reports nonsensical results for corrupt objects. There were actually two independent and confusing problems: - when we had a zero-sized file and used map_sha1_file, mmap() would return EINVAL, and git-fsck-objects would report that as an insane and confusing error. I don't know when this was introduced, it might have been there forever. - when "parse_object()" returned NULL, fsck would say "object not found", which can be very confusing, since obviously the object might "exist", it's just unparseable because it's totally corrupt. So this just makes "xmmap()" return NULL for a zero-sized object (which is a valid thing pointer, exactly the same way "malloc()" can return NULL for a zero-sized allocation). That fixes the first problem (but we could have fixed it in the caller too - I don't personally much care whichever way it goes, but maybe somebody should check that the NO_MMAP case does something sane in this case too?). And the second problem is solved by just making the error message slightly clearer - the failure to parse an object may be because it's missing or corrupt, not necessarily because it's not "found". Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Replacing the system call pread() with lseek()/xread()/lseek() sequence.Stefan-W. Hahn2007-01-091-0/+5
| | | | | | | | | Using cygwin with cygwin.dll before 1.5.22 the system call pread() is buggy. This patch introduces NO_PREAD. If NO_PREAD is set git uses a sequence of lseek()/xread()/lseek() to emulate pread. Signed-off-by: Stefan-W. Hahn <stefan.hahn@s-hahn.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Spell default packedgitlimit slightly differentlyJunio C Hamano2007-01-071-3/+1
| | | | | | | This is shorter and easier to read, and also makes sure the constant expression does not overflow integer range. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Increase packedGit{Limit,WindowSize} on 64 bit systems.Shawn O. Pearce2007-01-061-2/+8
| | | | | | | | | | | | | | If we have a 64 bit address space we can easily afford to commit a larger amount of virtual address space to pack file access. So on these platforms we should increase the default settings of core.packedGit{Limit,WindowSize} to something that will better handle very large projects. Thanks to Andy Whitcroft for pointing out that we can safely increase these defaults on such systems. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Replace mmap with xmmap, better handling MAP_FAILED.Shawn O. Pearce2006-12-291-0/+13
| | | | | | | | | | | | | | | | | | In some cases we did not even bother to check the return value of mmap() and just assume it worked. This is bad, because if we are out of virtual address space the kernel returned MAP_FAILED and we would attempt to dereference that address, segfaulting without any real error output to the user. We are replacing all calls to mmap() with xmmap() and moving all MAP_FAILED checking into that single location. If a mmap call fails we try to release enough least-recently-used pack windows to possibly succeed, then retry the mmap() attempt. If we cannot mmap even after releasing pack memory then we die() as none of our callers have any reasonable recovery strategy for a failed mmap. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Release pack windows before reporting out of memory.Shawn O. Pearce2006-12-291-8/+32
| | | | | | | | | | | | | | | | | | If we are about to fail because this process has run out of memory we should first try to automatically control our appetite for address space by releasing enough least-recently-used pack windows to gain back enough memory such that we might actually be able to meet the current allocation request. This should help users who have fairly large repositories but are working on systems with relatively small virtual address space. Many times we see reports on the mailing list of these users running out of memory during various Git operations. Dynamically decreasing the amount of pack memory used when the demand for heap memory is increasing is an intelligent solution to this problem. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Default core.packdGitWindowSize to 1 MiB if NO_MMAP.Shawn O. Pearce2006-12-291-0/+5
| | | | | | | | | | | | | | | | | | If the compiler has asked us to disable use of mmap() on their platform then we are forced to use git_mmap and its emulation via pread. In this case large (e.g. 32 MiB) windows for pack access are simply too big as a command will wind up reading a lot more data than it will ever need, significantly reducing response time. To prevent a high latency when NO_MMAP has been selected we now use a default of 1 MiB for core.packedGitWindowSize. Credit goes to Linus and Junio for recommending this more reasonable setting. [jc: upcased the name of the symbolic constant, and made another hardcoded constant into a symbolic constant while at it. ] Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Rename gitfakemmap to git_mmap.Shawn O. Pearce2006-12-241-4/+4
| | | | | | | | | | | This minor cleanup was suggested by Johannes Schindelin. The mmap is still fake in the sense that we don't support PROT_WRITE or MAP_SHARED with external modification at all, but that hasn't stopped us from using mmap() thoughout the Git code. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Really fix headers for __FreeBSD__Junio C Hamano2006-12-221-1/+1
| | | | | | The symbol to detect FreeBSD is __FreeBSD__, not __FreeBSD. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Introduce a global level warn() function.Shawn O. Pearce2006-12-211-0/+2
| | | | | | | | | | | | | | Like the existing error() function the new warn() function can be used to describe a situation that probably should not be occuring, but which the user (and Git) can continue to work around without running into too many problems. An example situation is a bad commit SHA1 found in a reflog. Attempting to read this record out of the reflog isn't really an error as we have skipped over it in the past. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
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