path: root/exec_cmd.c
AgeCommit message (Collapse)Author
2011-03-17Name make_*_path functions more accuratelyCarlos Martín Nieto
Rename the make_*_path functions so it's clearer what they do, in particlar make clear what the differnce between make_absolute_path and make_nonrelative_path is by renaming them real_path and absolute_path respectively. make_relative_path has an understandable name and is renamed to relative_path to maintain the name convention. The function calls have been replaced 1-to-1 in their usage. Signed-off-by: Carlos Martín Nieto <> Signed-off-by: Junio C Hamano <>
2011-01-19exec_cmd: remove unused externErik Faye-Lund
This definition was added by commit 77cb17e9, but it's left unused since commit 511707d. Remove the left-over definition. Signed-off-by: Erik Faye-Lund <> Signed-off-by: Junio C Hamano <>
2010-05-21Merge branch 'cw/maint-exec-defpath'Junio C Hamano
* cw/maint-exec-defpath: autoconf: Check if <paths.h> exists and set HAVE_PATHS_H exec_cmd.c: replace hard-coded path list with one from <paths.h>
2010-04-15exec_cmd.c: replace hard-coded path list with one from <paths.h>Chris Webb
The default executable path list used by exec_cmd.c is hard-coded to be "/usr/local/bin:/usr/bin:/bin". Use an appropriate value for the system from <paths.h> when available. Add HAVE_PATHS_H make variables and enable it on Linux, FreeBSD, NetBSD, OpenBSD and GNU where it is known to exist for now. Somebody else may want to do an autoconf support later. Signed-off-by: Chris Webb <> Signed-off-by: Junio C Hamano <>
2010-02-23Print RUNTIME_PREFIX warning only when GIT_TRACE is setJohannes Sixt
When RUNTIME_PREFIX is enabled, the installation prefix is derived by trying a limited set of known locations where the git executable can reside. If none of these is found, a warning is emitted. When git is built in a directory that matches neither of these known names, the warning would always be emitted when the uninstalled executable is run. This is a problem on Windows, where gitk picks the uninstalled git when invoked from the build directory and gets confused by the warning. Print the warning only when GIT_TRACE is set. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-03-26Merge branch 'js/maint-1.6.0-exec-path-env'Junio C Hamano
* js/maint-1.6.0-exec-path-env: Propagate --exec-path setting to external commands via GIT_EXEC_PATH
2009-03-22Propagate --exec-path setting to external commands via GIT_EXEC_PATHJohannes Sixt
Let PATH0=$PATH that was set before the invocation. Let /foo be a build directory. Let /pfx be the installation prefix. Let pfxexecpath=/pfx/libexec/git-core. The following is going on when 'git --exec-path=/foo gc' is invoked: 1. git sets PATH=/foo:$PATH0 using the path from --exec-path 2. gc execs 'git repack' (note: no dash). 3. Since there is a git in /foo (it's a build directory), /foo/git is taken. 4. No explicit exec-path is set this time, hence, this secondary git sets PATH=$pfxexecpath:/foo:$PATH 5. Since 'repack' is not a built-in, execv_dashed_external execs 'git-repack' (note: dash). 6. There is a $pfxexecpath/git-repack, and it is taken. 7. This git-repack runs 'git pack-objects' (note: no dash). 8. There is no git in $pfxexecpath, but there is one in /foo. Hence, /foo/git is run. 9. pack-objects is a builtin, hence, in effect /foo/git-pack-objects is run. As you can see, the way in which we previously set the PATH allowed to mix gits of different vintage. By setting GIT_EXEC_PATH when --exec-path was given on the command line, we reduce the confusion. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-02-20system_path(): simplify using strip_path_suffix(), and add suffix "git"Johannes Schindelin
At least for the author of this patch, the logic in system_path() was too hard to understand. Using the function strip_path_suffix() documents the idea of the code better. The real change is to add the suffix "git", so that a runtime prefix will be computed correctly even when the executable was called in /git/ as is the case in msysGit (Windows insists to search the current directory before the PATH when looking for an executable). Signed-off-by: Johannes Schindelin <> Acked-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-01-26Compute prefix at runtime if RUNTIME_PREFIX is setSteffen Prohaska
This commit adds support for relocatable binaries (called RUNTIME_PREFIX). Such binaries can be moved together with the system configuration files to a different directory, as long as the relative paths from the binary to the configuration files is preserved. This functionality is essential on Windows where we deliver git binaries with an installer that allows to freely choose the installation location. If RUNTIME_PREFIX is unset we use the static prefix. This will be the default on Unix. Thus, the behavior on Unix will remain identical to the old implementation, which used to add the prefix in the Makefile. If RUNTIME_PREFIX is set the prefix is computed from the location of the executable. In this case, system_path() tries to strip known directories that executables can be located in from the path of the executable. If the path is successfully stripped it is used as the prefix. For example, if the executable is "/msysgit/bin/git" and BINDIR is "bin", then the prefix computed is "/msysgit". If the runtime prefix computation fails, we fall back to the static prefix specified in the makefile. This can be the case if the executable is not installed at a known location. Note that our test system sets GIT_CONFIG_NOSYSTEM to tell git to ignore global configuration files during testing. Hence testing does not trigger the fall back. Note that RUNTIME_PREFIX only works on Windows, though adding support on Unix should not be too hard. The implementation requires argv0_path to be set to an absolute path. argv0_path must point to the directory of the executable. We use assert() to verify this in debug builds. On Windows, the wrapper for main() (see compat/mingw.h) guarantees that argv0_path is correctly initialized. On Unix, further work is required before RUNTIME_PREFIX can be enabled. Signed-off-by: Steffen Prohaska <> Acked-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-01-26Modify setup_path() to only add git_exec_path() to PATHSteffen Prohaska
Searching git programs only in the highest priority location is sufficient. It does not make sense that some of the required programs are located at the highest priority location but other programs are picked up from a lower priority exec-path. If exec-path is overridden a complete set of commands should be provided, otherwise several different versions could get mixed, which is likely to cause confusion. If a user explicitly overrides the default location (by --exec-path or GIT_EXEC_PATH), we now expect that all the required programs are found there. Instead of adding the directories "argv_exec_path", "getenv(EXEC_PATH_ENVIRONMENT)", and "system_path(GIT_EXEC_PATH)" to PATH, we now rely on git_exec_path(), which implements the same order, but only returns the highest priority location to search for executables. Accessing only the location with highest priority is also required for testing executables built with RUNTIME_PREFIX. The call to system_path() should be avoided if RUNTIME_PREFIX is set and the executable is not installed at its final destination. Because we test before installing, we want to avoid calling system_path() during tests. The modifications in this commit avoid calling system_path(GIT_EXEC_PATH) if a higher-priority location is provided, which is the case when running the tests. Signed-off-by: Steffen Prohaska <> Acked-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-01-26git_extract_argv0_path(): Move check for valid argv0 from caller to calleeSteffen Prohaska
This simplifies the calling code. Signed-off-by: Steffen Prohaska <> Acked-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-01-26Refactor git_set_argv0_path() to git_extract_argv0_path()Steve Haslam
This commit moves the code that computes the dirname of argv[0] from git.c's main() to git_set_argv0_path() and renames the function to git_extract_argv0_path(). This makes the code in git.c's main less cluttered, and we can use the dirname computation from other main() functions too. [ spr: - split Steve's original commit and wrote new commit message. - Integrated Johannes Schindelin's cca1704897e7fdb182f68d4c48a437c5d7bc5203 while rebasing onto master. ] Signed-off-by: Steve Haslam <> Signed-off-by: Steffen Prohaska <> Acked-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2009-01-26Move computation of absolute paths from Makefile to runtime (in preparation ↵Steffen Prohaska
for RUNTIME_PREFIX) This commit prepares the Makefile for relocatable binaries (called RUNTIME_PREFIX). Such binaries will be able to be moved together with the system configuration files to a different directory, requiring to compute the prefix at runtime. In a first step, we make all paths relative in the Makefile and teach system_path() to add the prefix instead. We used to compute absolute paths in the Makefile and passed them to C as defines. We now pass relative paths to C and call system_path() to add the prefix at runtime. Signed-off-by: Steffen Prohaska <> Acked-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2008-10-12Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializerBrandon Casey
Many call sites use strbuf_init(&foo, 0) to initialize local strbuf variable "foo" which has not been accessed since its declaration. These can be replaced with a static initialization using the STRBUF_INIT macro which is just as readable, saves a function call, and takes up fewer lines. Signed-off-by: Brandon Casey <> Signed-off-by: Shawn O. Pearce <>
2008-07-29Refactor, adding prepare_git_cmd(const char **argv)Steffen Prohaska
prepare_git_cmd(const char **argv) adds a first entry "git" to the array argv. The new array is allocated on the heap. It's the caller's responsibility to release it with free(). The code was already present in execv_git_cmd() but could not be used from outside. Now it can also be called for preparing the command list in the MinGW codepath in run-command.c. Signed-off-by: Steffen Prohaska <> Signed-off-by: Junio C Hamano <>
2008-07-26Allow add_path() to add non-existent directories to the pathJohannes Sixt
This function had used make_absolute_path(); but this function dies if the directory that contains the entry whose relative path was supplied in the argument does not exist. This is a problem if the argument is, for example, "../libexec/git-core", and that "../libexec" does not exist. Since the resolution of symbolic links is not required for elements in PATH, we can fall back to using make_nonrelative_path(), which simply prepends $PWD to the path. We have to move make_nonrelative_path() alongside make_absolute_path() in abspath.c so that git-shell can be linked. See 5b8e6f85f. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2008-07-26Allow the built-in exec path to be relative to the command invocation pathJohannes Sixt
If GIT_EXEC_PATH (the macro that is defined in the Makefile) is relative, it is interpreted relative to the command's invocation path, which usually is $(bindir). The Makefile rules were written with the assumption that $(gitexecdir) is an absolute path. We introduce a separate variable that names the (absolute) installation directory. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2008-07-26Fix relative built-in paths to be relative to the command invocationJohannes Sixt
$(gitexecdir) (as defined in the Makefile) has gained another path component, but the relative paths in the MINGW section of the Makefile, which are interpreted relative to it, do not account for it. Instead of adding another ../ in front of the path, we change the code that constructs the absolute paths to do it relative to the command's directory, which is essentially $(bindir). We do it this way because we will also allow a relative $(gitexecdir) later. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2008-07-26Record the command invocation path earlyJohannes Sixt
We will need the command invocation path in system_path(). This path was passed to setup_path(), but system_path() can be called earlier, for example via: main commit_pager_choice setup_pager git_config git_etc_gitconfig system_path Therefore, we introduce git_set_argv0_path() and call it as soon as possible. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2008-07-13Move code interpreting path relative to exec-dir to new function system_path()Steffen Prohaska
Expanding system paths relative to git_exec_path can be used for creating an installation that can be moved to a different directory without re-compiling. We use this approach for template_dir and the system wide gitconfig. The Windows installer (msysgit) is an example for such a setup. This commit moves common code to a new function system_path(). System paths that are to be interpreted relative to git_exec_path are passed to system_path() and the return value is used instead of the original path. system_path() prefixes a relative path with git_exec_path and leaves absolute paths unmodified. For example, we now write template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR); [j6t: moved from path.c to exec_cmd.c] Signed-off-by: Steffen Prohaska <> Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2008-07-03Merge branch 'j6t/mingw'Junio C Hamano
* j6t/mingw: (38 commits) compat/pread.c: Add a forward declaration to fix a warning Windows: Fix ntohl() related warnings about printf formatting Windows: TMP and TEMP environment variables specify a temporary directory. Windows: Make 'git help -a' work. Windows: Work around an oddity when a pipe with no reader is written to. Windows: Make the pager work. When installing, be prepared that template_dir may be relative. Windows: Use a relative default template_dir and ETC_GITCONFIG Windows: Compute the fallback for exec_path from the program invocation. Turn builtin_exec_path into a function. Windows: Use a customized struct stat that also has the st_blocks member. Windows: Add a custom implementation for utime(). Windows: Add a new lstat and fstat implementation based on Win32 API. Windows: Implement a custom spawnve(). Windows: Implement wrappers for gethostbyname(), socket(), and connect(). Windows: Work around incompatible sort and find. Windows: Implement asynchronous functions as threads. Windows: Disambiguate DOS style paths from SSH URLs. Windows: A rudimentary poll() emulation. Windows: Implement start_command(). ...
2008-06-26Windows: Compute the fallback for exec_path from the program invocation.Johannes Sixt
Since on Windows the user is fairly free where to install programs, we cannot rely on a hard-coded path. We use the program name to derive the installation directory and use that as exec_path. Signed-off-by: Johannes Sixt <>
2008-06-26Turn builtin_exec_path into a function.Johannes Sixt
builtin_exec_path returns the hard-coded installation path, which is used as the ultimate fallback to look for git commands. Making it into a function enables us in a follow-up patch to return a computed value instead of just a constant string. Signed-off-by: Johannes Sixt <>
2008-06-24Prepare execv_git_cmd() for removal of builtins from the filesystemJunio C Hamano
Currently, execv_git_cmd() always try running the dashed form, which means we cannot easily remove the git-foo hardlinks for built-in commands. This updates the function to always exec "git foo" form, and makes sure "git" potty does not infinitely recurse to itself. Signed-off-by: Junio C Hamano <>
2008-06-22Windows: Use the Windows style PATH separator ';'.Johannes Sixt
Signed-off-by: Johannes Sixt <>
2007-12-04Trace and quote with argv: get rid of unneeded count argument.Christian Couder
Now that str_buf takes care of all the allocations, there is no more gain to pass an argument count. So this patch removes the "count" argument from: - "sq_quote_argv" - "trace_argv_printf" and all the callers. Signed-off-by: Christian Couder <> Signed-off-by: Junio C Hamano <>
2007-10-30use only the $PATH for exec'ing git commandsScott R Parish
We need to correctly set up $PATH for non-c based git commands. Since we already do this, we can just use that $PATH and execvp, instead of looping over the paths with execve. This patch adds a setup_path() function to exec_cmd.c, which sets the $PATH order correctly for our search order. execv_git_cmd() is stripped down to setting up argv and calling execvp(). git.c's main() only only needs to call setup_path(). Signed-off-by: Scott R Parish <> Signed-off-by: Junio C Hamano <>
2007-10-30"current_exec_path" is a misleading name, use "argv_exec_path"Scott R Parish
Signed-off-by: Scott R Parish <> Signed-off-by: Junio C Hamano <>
2007-02-21Mechanical conversion to use prefixcmp()Junio C Hamano
This mechanically converts strncmp() to use prefixcmp(), but only when the parameters match specific patterns, so that they can be verified easily. Leftover from this will be fixed in a separate step, including idiotic conversions like if (!strncmp("foo", arg, 3)) => if (!(-prefixcmp(arg, "foo"))) This was done by using this script in px.perl #!/usr/bin/perl -i.bak -p if (/strncmp\(([^,]+), "([^\\"]*)", (\d+)\)/ && (length($2) == $3)) { s|strncmp\(([^,]+), "([^\\"]*)", (\d+)\)|prefixcmp($1, "$2")|; } if (/strncmp\("([^\\"]*)", ([^,]+), (\d+)\)/ && (length($1) == $3)) { s|strncmp\("([^\\"]*)", ([^,]+), (\d+)\)|(-prefixcmp($2, "$1"))|; } and running: $ git grep -l strncmp -- '*.c' | xargs perl px.perl Signed-off-by: Junio C Hamano <>
2006-12-19Use preprocessor constants for environment variable names.Junio C Hamano
We broke the discipline Linus set up to allow compiler help us avoid typos in environment names in the early days of git over time. This defines a handful preprocessor constants for environment variable names used in relatively core parts of the system. I've left out variable names specific to subsystems such as HTTP and SSL as I do not think they are big problems. Signed-off-by: Junio C Hamano <>
2006-08-31Trace into open fd and refactor tracing code.Christian Couder
Now if GIT_TRACE is set to an integer value greater than 1 and lower than 10, we interpret this as an open fd value and we trace into it. Note that this behavior is not compatible with the previous one. We also trace whole messages using one write(2) call to make sure messages from processes do net get mixed up in the middle. It's now possible to run the tests like this: GIT_TRACE=9 make test 9>/var/tmp/trace.log Signed-off-by: Christian Couder <> Signed-off-by: Junio C Hamano <>
2006-08-16remove unnecessary initializationsDavid Rientjes
[jc: I needed to hand merge the changes to the updated codebase, so the result needs to be checked.] Signed-off-by: David Rientjes <> Signed-off-by: Junio C Hamano <>
2006-07-09GIT_TRACE: fix a mixed declarations and code warningTimo Hirvonen
Signed-off-by: Timo Hirvonen <> Signed-off-by: Junio C Hamano <>
2006-07-09GIT_TRACE: show which built-in/external commands are executedMatthias Lederhofer
With the environment variable GIT_TRACE set git will show - alias expansion - built-in command execution - external command execution on stderr. Signed-off-by: Matthias Lederhofer <> Signed-off-by: Junio C Hamano <>
2006-05-31git_exec_path, execv_git_cmd: ignore empty environment variablesDmitry V. Levin
Ignoring empty environment variables is good common practice. Ignoring --exec-path with empty argument won't harm, too: if user means current directory, there is a "--exec-path=." Signed-off-by: Dmitry V. Levin <> Signed-off-by: Junio C Hamano <>
2006-05-31execv_git_cmd: Fix stack buffer overflow.Dmitry V. Levin
Signed-off-by: Dmitry V. Levin <> Signed-off-by: Junio C Hamano <>
2006-04-17cleanups: remove unused variable from exec_cmd.cSerge E. Hallyn
Not sure whether it should be removed, or whether execv_git_cmd() should return it rather than -1 at bottom. Signed-off-by: Serge E. Hallyn <> Signed-off-by: Junio C Hamano <>
2006-03-09Use #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))Junio C Hamano
Signed-off-by: Junio C Hamano <>
2006-03-05Const tightening.Junio C Hamano
Mark Wooding noticed there was a type mismatch warning in git.c; this patch does things slightly differently (mostly tightening const) and was what I was holding onto, waiting for the setup-revisions change to be merged into the master branch. Signed-off-by: Junio C Hamano <>
2006-02-26Use setenv(), fix warningsTimo Hirvonen
- Fix -Wundef -Wold-style-definition warnings - Make pll_free() static [jc: original patch by Timo had another unrelated bits: - Use setenv() instead of putenv() I'm postponing that part for now.] Signed-off-by: Timo Hirvonen <> Signed-off-by: Junio C Hamano <>
2006-01-14Exec git programs without using PATH.Michal Ostrowski
The git suite may not be in PATH (and thus programs such as git-send-pack could not exec git-rev-list). Thus there is a need for logic that will locate these programs. Modifying PATH is not desirable as it result in behavior differing from the user's intentions, as we may end up prepending "/usr/bin" to PATH. - git C programs will use exec*_git_cmd() APIs to exec sub-commands. - exec*_git_cmd() will execute a git program by searching for it in the following directories: 1. --exec-path (as used by "git") 2. The GIT_EXEC_PATH environment variable. 3. $(gitexecdir) as set in Makefile (default value $(bindir)). - git wrapper will modify PATH as before to enable shell scripts to invoke "git-foo" commands. Ideally, shell scripts should use the git wrapper to become independent of PATH, and then modifying PATH will not be necessary. [jc: with minor updates after a brief review.] Signed-off-by: Michal Ostrowski <> Signed-off-by: Junio C Hamano <>