a7bc01eb25
Teach Git to resolve the executable directory before initializing Trace2. This allows the system configuration directory to be discovered earlier (because it is sometimes relative to the prefix or runtime-prefix). This will be used by the next commit to allow trace2 settings to be loaded from the system config. Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
#include "cache.h"
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#include "exec-cmd.h"
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#include "attr.h"
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/*
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* Many parts of Git have subprograms communicate via pipe, expect the
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* upstream of a pipe to die with SIGPIPE when the downstream of a
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* pipe does not need to read all that is written. Some third-party
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* programs that ignore or block SIGPIPE for their own reason forget
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* to restore SIGPIPE handling to the default before spawning Git and
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* break this carefully orchestrated machinery.
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*
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* Restore the way SIGPIPE is handled to default, which is what we
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* expect.
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*/
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static void restore_sigpipe_to_default(void)
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{
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sigset_t unblock;
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sigemptyset(&unblock);
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sigaddset(&unblock, SIGPIPE);
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sigprocmask(SIG_UNBLOCK, &unblock, NULL);
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signal(SIGPIPE, SIG_DFL);
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}
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int main(int argc, const char **argv)
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{
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int result;
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trace2_initialize_clock();
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/*
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* Always open file descriptors 0/1/2 to avoid clobbering files
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* in die(). It also avoids messing up when the pipes are dup'ed
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* onto stdin/stdout/stderr in the child processes we spawn.
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*/
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sanitize_stdfds();
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restore_sigpipe_to_default();
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git_resolve_executable_dir(argv[0]);
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trace2_initialize();
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trace2_cmd_start(argv);
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trace2_collect_process_info();
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git_setup_gettext();
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initialize_the_repository();
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attr_start();
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result = cmd_main(argc, argv);
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trace2_cmd_exit(result);
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return result;
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}
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