builtin/show: do not prune by pathspec
[git/mjg.git] / common-main.c
blob8e68ac9e42993dcbc1ed00ad04318fa0b642b812
1 #define USE_THE_REPOSITORY_VARIABLE
3 #include "git-compat-util.h"
4 #include "exec-cmd.h"
5 #include "gettext.h"
6 #include "attr.h"
7 #include "repository.h"
8 #include "setup.h"
9 #include "strbuf.h"
10 #include "trace2.h"
13 * Many parts of Git have subprograms communicate via pipe, expect the
14 * upstream of a pipe to die with SIGPIPE when the downstream of a
15 * pipe does not need to read all that is written. Some third-party
16 * programs that ignore or block SIGPIPE for their own reason forget
17 * to restore SIGPIPE handling to the default before spawning Git and
18 * break this carefully orchestrated machinery.
20 * Restore the way SIGPIPE is handled to default, which is what we
21 * expect.
23 static void restore_sigpipe_to_default(void)
25 sigset_t unblock;
27 sigemptyset(&unblock);
28 sigaddset(&unblock, SIGPIPE);
29 sigprocmask(SIG_UNBLOCK, &unblock, NULL);
30 signal(SIGPIPE, SIG_DFL);
33 int main(int argc, const char **argv)
35 int result;
36 struct strbuf tmp = STRBUF_INIT;
38 trace2_initialize_clock();
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.
45 sanitize_stdfds();
46 restore_sigpipe_to_default();
48 git_resolve_executable_dir(argv[0]);
50 setlocale(LC_CTYPE, "");
51 git_setup_gettext();
53 initialize_repository(the_repository);
55 attr_start();
57 trace2_initialize();
58 trace2_cmd_start(argv);
59 trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
61 if (!strbuf_getcwd(&tmp))
62 tmp_original_cwd = strbuf_detach(&tmp, NULL);
64 result = cmd_main(argc, argv);
66 /* Not exit(3), but a wrapper calling our common_exit() */
67 exit(result);
70 static void check_bug_if_BUG(void)
72 if (!bug_called_must_BUG)
73 return;
74 BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()");
77 /* We wrap exit() to call common_exit() in git-compat-util.h */
78 int common_exit(const char *file, int line, int code)
81 * For non-POSIX systems: Take the lowest 8 bits of the "code"
82 * to e.g. turn -1 into 255. On a POSIX system this is
83 * redundant, see exit(3) and wait(2), but as it doesn't harm
84 * anything there we don't need to guard this with an "ifdef".
86 code &= 0xff;
88 check_bug_if_BUG();
89 trace2_cmd_exit_fl(file, line, code);
91 return code;