| /* |
| * GIT - The information manager from hell |
| * |
| * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org> |
| * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net> |
| * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu> |
| * Copyright (C) 2006 Mike McCormack |
| * Copyright (C) 2006 Christian Couder |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include "cache.h" |
| #include "quote.h" |
| |
| /* Get a trace file descriptor from "key" env variable. */ |
| static int get_trace_fd(const char *key, int *need_close) |
| { |
| char *trace = getenv(key); |
| |
| if (!trace || !strcmp(trace, "") || |
| !strcmp(trace, "0") || !strcasecmp(trace, "false")) |
| return 0; |
| if (!strcmp(trace, "1") || !strcasecmp(trace, "true")) |
| return STDERR_FILENO; |
| if (strlen(trace) == 1 && isdigit(*trace)) |
| return atoi(trace); |
| if (is_absolute_path(trace)) { |
| int fd = open(trace, O_WRONLY | O_APPEND | O_CREAT, 0666); |
| if (fd == -1) { |
| fprintf(stderr, |
| "Could not open '%s' for tracing: %s\n" |
| "Defaulting to tracing on stderr...\n", |
| trace, strerror(errno)); |
| return STDERR_FILENO; |
| } |
| *need_close = 1; |
| return fd; |
| } |
| |
| fprintf(stderr, "What does '%s' for %s mean?\n", trace, key); |
| fprintf(stderr, "If you want to trace into a file, " |
| "then please set %s to an absolute pathname " |
| "(starting with /).\n", key); |
| fprintf(stderr, "Defaulting to tracing on stderr...\n"); |
| |
| return STDERR_FILENO; |
| } |
| |
| static const char err_msg[] = "Could not trace into fd given by " |
| "GIT_TRACE environment variable"; |
| |
| static void trace_vprintf(const char *key, const char *fmt, va_list ap) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| |
| if (!trace_want(key)) |
| return; |
| |
| set_try_to_free_routine(NULL); /* is never reset */ |
| strbuf_vaddf(&buf, fmt, ap); |
| trace_strbuf(key, &buf); |
| strbuf_release(&buf); |
| } |
| |
| __attribute__((format (printf, 2, 3))) |
| static void trace_printf_key(const char *key, const char *fmt, ...) |
| { |
| va_list ap; |
| va_start(ap, fmt); |
| trace_vprintf(key, fmt, ap); |
| va_end(ap); |
| } |
| |
| void trace_printf(const char *fmt, ...) |
| { |
| va_list ap; |
| va_start(ap, fmt); |
| trace_vprintf("GIT_TRACE", fmt, ap); |
| va_end(ap); |
| } |
| |
| void trace_strbuf(const char *key, const struct strbuf *buf) |
| { |
| int fd, need_close = 0; |
| |
| fd = get_trace_fd(key, &need_close); |
| if (!fd) |
| return; |
| |
| write_or_whine_pipe(fd, buf->buf, buf->len, err_msg); |
| |
| if (need_close) |
| close(fd); |
| } |
| |
| void trace_argv_printf(const char **argv, const char *fmt, ...) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| va_list ap; |
| int fd, need_close = 0; |
| |
| fd = get_trace_fd("GIT_TRACE", &need_close); |
| if (!fd) |
| return; |
| |
| set_try_to_free_routine(NULL); /* is never reset */ |
| va_start(ap, fmt); |
| strbuf_vaddf(&buf, fmt, ap); |
| va_end(ap); |
| |
| sq_quote_argv(&buf, argv, 0); |
| strbuf_addch(&buf, '\n'); |
| write_or_whine_pipe(fd, buf.buf, buf.len, err_msg); |
| strbuf_release(&buf); |
| |
| if (need_close) |
| close(fd); |
| } |
| |
| static const char *quote_crnl(const char *path) |
| { |
| static char new_path[PATH_MAX]; |
| const char *p2 = path; |
| char *p1 = new_path; |
| |
| if (!path) |
| return NULL; |
| |
| while (*p2) { |
| switch (*p2) { |
| case '\\': *p1++ = '\\'; *p1++ = '\\'; break; |
| case '\n': *p1++ = '\\'; *p1++ = 'n'; break; |
| case '\r': *p1++ = '\\'; *p1++ = 'r'; break; |
| default: |
| *p1++ = *p2; |
| } |
| p2++; |
| } |
| *p1 = '\0'; |
| return new_path; |
| } |
| |
| /* FIXME: move prefix to startup_info struct and get rid of this arg */ |
| void trace_repo_setup(const char *prefix) |
| { |
| static const char *key = "GIT_TRACE_SETUP"; |
| const char *git_work_tree; |
| char cwd[PATH_MAX]; |
| |
| if (!trace_want(key)) |
| return; |
| |
| if (!getcwd(cwd, PATH_MAX)) |
| die("Unable to get current working directory"); |
| |
| if (!(git_work_tree = get_git_work_tree())) |
| git_work_tree = "(null)"; |
| |
| if (!prefix) |
| prefix = "(null)"; |
| |
| trace_printf_key(key, "setup: git_dir: %s\n", quote_crnl(get_git_dir())); |
| trace_printf_key(key, "setup: worktree: %s\n", quote_crnl(git_work_tree)); |
| trace_printf_key(key, "setup: cwd: %s\n", quote_crnl(cwd)); |
| trace_printf_key(key, "setup: prefix: %s\n", quote_crnl(prefix)); |
| } |
| |
| int trace_want(const char *key) |
| { |
| const char *trace = getenv(key); |
| |
| if (!trace || !strcmp(trace, "") || |
| !strcmp(trace, "0") || !strcasecmp(trace, "false")) |
| return 0; |
| return 1; |
| } |