зеркало из https://github.com/microsoft/git.git
86 строки
2.1 KiB
C
86 строки
2.1 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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struct strbuf tmp = STRBUF_INIT;
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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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setlocale(LC_CTYPE, "");
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git_setup_gettext();
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initialize_the_repository();
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attr_start();
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trace2_initialize();
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trace2_cmd_start(argv);
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trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
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if (!strbuf_getcwd(&tmp))
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tmp_original_cwd = strbuf_detach(&tmp, NULL);
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result = cmd_main(argc, argv);
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/* Not exit(3), but a wrapper calling our common_exit() */
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exit(result);
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}
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static void check_bug_if_BUG(void)
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{
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if (!bug_called_must_BUG)
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return;
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BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()");
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}
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/* We wrap exit() to call common_exit() in git-compat-util.h */
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int common_exit(const char *file, int line, int code)
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{
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/*
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* For non-POSIX systems: Take the lowest 8 bits of the "code"
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* to e.g. turn -1 into 255. On a POSIX system this is
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* redundant, see exit(3) and wait(2), but as it doesn't harm
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* anything there we don't need to guard this with an "ifdef".
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*/
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code &= 0xff;
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check_bug_if_BUG();
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trace2_cmd_exit_fl(file, line, code);
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return code;
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}
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