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-rw-r--r--common-main.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/common-main.c b/common-main.c
new file mode 100644
index 0000000000..44a29e8b13
--- /dev/null
+++ b/common-main.c
@@ -0,0 +1,41 @@
+#include "cache.h"
+#include "exec_cmd.h"
+
+/*
+ * Many parts of Git have subprograms communicate via pipe, expect the
+ * upstream of a pipe to die with SIGPIPE when the downstream of a
+ * pipe does not need to read all that is written. Some third-party
+ * programs that ignore or block SIGPIPE for their own reason forget
+ * to restore SIGPIPE handling to the default before spawning Git and
+ * break this carefully orchestrated machinery.
+ *
+ * Restore the way SIGPIPE is handled to default, which is what we
+ * expect.
+ */
+static void restore_sigpipe_to_default(void)
+{
+ sigset_t unblock;
+
+ sigemptyset(&unblock);
+ sigaddset(&unblock, SIGPIPE);
+ sigprocmask(SIG_UNBLOCK, &unblock, NULL);
+ signal(SIGPIPE, SIG_DFL);
+}
+
+int main(int argc, const char **argv)
+{
+ /*
+ * Always open file descriptors 0/1/2 to avoid clobbering files
+ * in die(). It also avoids messing up when the pipes are dup'ed
+ * onto stdin/stdout/stderr in the child processes we spawn.
+ */
+ sanitize_stdfds();
+
+ git_setup_gettext();
+
+ argv[0] = git_extract_argv0_path(argv[0]);
+
+ restore_sigpipe_to_default();
+
+ return cmd_main(argc, argv);
+}