common-init.c

   1 #define USE_THE_REPOSITORY_VARIABLE
   2
   3 #include "git-compat-util.h"
   4 #include "common-init.h"
   5 #include "exec-cmd.h"
   6 #include "gettext.h"
   7 #include "attr.h"
   8 #include "repository.h"
   9 #include "setup.h"
  10 #include "strbuf.h"
  11 #include "trace2.h"
  12
  13 /*
  14  * Many parts of Git have subprograms communicate via pipe, expect the
  15  * upstream of a pipe to die with SIGPIPE when the downstream of a
  16  * pipe does not need to read all that is written.  Some third-party
  17  * programs that ignore or block SIGPIPE for their own reason forget
  18  * to restore SIGPIPE handling to the default before spawning Git and
  19  * break this carefully orchestrated machinery.
  20  *
  21  * Restore the way SIGPIPE is handled to default, which is what we
  22  * expect.
  23  */
  24 static void restore_sigpipe_to_default(void)
  25 {
  26         sigset_t unblock;
  27
  28         sigemptyset(&unblock);
  29         sigaddset(&unblock, SIGPIPE);
  30         sigprocmask(SIG_UNBLOCK, &unblock, NULL);
  31         signal(SIGPIPE, SIG_DFL);
  32 }
  33
  34 void init_git(const char **argv)
  35 {
  36         struct strbuf tmp = STRBUF_INIT;
  37
  38         trace2_initialize_clock();
  39
  40         /*
  41          * Always open file descriptors 0/1/2 to avoid clobbering files
  42          * in die().  It also avoids messing up when the pipes are dup'ed
  43          * onto stdin/stdout/stderr in the child processes we spawn.
  44          */
  45         sanitize_stdfds();
  46         restore_sigpipe_to_default();
  47
  48         git_resolve_executable_dir(argv[0]);
  49
  50         setlocale(LC_CTYPE, "");
  51         git_setup_gettext();
  52
  53         initialize_repository(the_repository);
  54
  55         attr_start();
  56
  57         trace2_initialize();
  58         trace2_cmd_start(argv);
  59         trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
  60
  61         if (!strbuf_getcwd(&tmp))
  62                 tmp_original_cwd = strbuf_detach(&tmp, NULL);
  63 }