1/* 2 * GIT - The information manager from hell 3 * 4 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org> 5 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net> 6 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu> 7 * Copyright (C) 2006 Mike McCormack 8 * Copyright (C) 2006 Christian Couder 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25#include"cache.h" 26#include"quote.h" 27 28/* Get a trace file descriptor from "key" env variable. */ 29static intget_trace_fd(const char*key,int*need_close) 30{ 31char*trace =getenv(key); 32 33if(!trace || !strcmp(trace,"") || 34!strcmp(trace,"0") || !strcasecmp(trace,"false")) 35return0; 36if(!strcmp(trace,"1") || !strcasecmp(trace,"true")) 37return STDERR_FILENO; 38if(strlen(trace) ==1&&isdigit(*trace)) 39returnatoi(trace); 40if(is_absolute_path(trace)) { 41int fd =open(trace, O_WRONLY | O_APPEND | O_CREAT,0666); 42if(fd == -1) { 43fprintf(stderr, 44"Could not open '%s' for tracing:%s\n" 45"Defaulting to tracing on stderr...\n", 46 trace,strerror(errno)); 47return STDERR_FILENO; 48} 49*need_close =1; 50return fd; 51} 52 53fprintf(stderr,"What does '%s' for%smean?\n", trace, key); 54fprintf(stderr,"If you want to trace into a file, " 55"then please set%sto an absolute pathname " 56"(starting with /).\n", key); 57fprintf(stderr,"Defaulting to tracing on stderr...\n"); 58 59return STDERR_FILENO; 60} 61 62static const char err_msg[] ="Could not trace into fd given by " 63"GIT_TRACE environment variable"; 64 65static voidtrace_vprintf(const char*key,const char*format,va_list ap) 66{ 67struct strbuf buf = STRBUF_INIT; 68 69if(!trace_want(key)) 70return; 71 72set_try_to_free_routine(NULL);/* is never reset */ 73strbuf_vaddf(&buf, format, ap); 74trace_strbuf(key, &buf); 75strbuf_release(&buf); 76} 77 78__attribute__((format(printf,2,3))) 79voidtrace_printf_key(const char*key,const char*format, ...) 80{ 81va_list ap; 82va_start(ap, format); 83trace_vprintf(key, format, ap); 84va_end(ap); 85} 86 87voidtrace_printf(const char*format, ...) 88{ 89va_list ap; 90va_start(ap, format); 91trace_vprintf("GIT_TRACE", format, ap); 92va_end(ap); 93} 94 95voidtrace_strbuf(const char*key,const struct strbuf *buf) 96{ 97int fd, need_close =0; 98 99 fd =get_trace_fd(key, &need_close); 100if(!fd) 101return; 102 103write_or_whine_pipe(fd, buf->buf, buf->len, err_msg); 104 105if(need_close) 106close(fd); 107} 108 109voidtrace_argv_printf(const char**argv,const char*format, ...) 110{ 111struct strbuf buf = STRBUF_INIT; 112va_list ap; 113int fd, need_close =0; 114 115 fd =get_trace_fd("GIT_TRACE", &need_close); 116if(!fd) 117return; 118 119set_try_to_free_routine(NULL);/* is never reset */ 120va_start(ap, format); 121strbuf_vaddf(&buf, format, ap); 122va_end(ap); 123 124sq_quote_argv(&buf, argv,0); 125strbuf_addch(&buf,'\n'); 126write_or_whine_pipe(fd, buf.buf, buf.len, err_msg); 127strbuf_release(&buf); 128 129if(need_close) 130close(fd); 131} 132 133static const char*quote_crnl(const char*path) 134{ 135static char new_path[PATH_MAX]; 136const char*p2 = path; 137char*p1 = new_path; 138 139if(!path) 140return NULL; 141 142while(*p2) { 143switch(*p2) { 144case'\\': *p1++ ='\\'; *p1++ ='\\';break; 145case'\n': *p1++ ='\\'; *p1++ ='n';break; 146case'\r': *p1++ ='\\'; *p1++ ='r';break; 147default: 148*p1++ = *p2; 149} 150 p2++; 151} 152*p1 ='\0'; 153return new_path; 154} 155 156/* FIXME: move prefix to startup_info struct and get rid of this arg */ 157voidtrace_repo_setup(const char*prefix) 158{ 159static const char*key ="GIT_TRACE_SETUP"; 160const char*git_work_tree; 161char cwd[PATH_MAX]; 162 163if(!trace_want(key)) 164return; 165 166if(!getcwd(cwd, PATH_MAX)) 167die("Unable to get current working directory"); 168 169if(!(git_work_tree =get_git_work_tree())) 170 git_work_tree ="(null)"; 171 172if(!prefix) 173 prefix ="(null)"; 174 175trace_printf_key(key,"setup: git_dir:%s\n",quote_crnl(get_git_dir())); 176trace_printf_key(key,"setup: worktree:%s\n",quote_crnl(git_work_tree)); 177trace_printf_key(key,"setup: cwd:%s\n",quote_crnl(cwd)); 178trace_printf_key(key,"setup: prefix:%s\n",quote_crnl(prefix)); 179} 180 181inttrace_want(const char*key) 182{ 183const char*trace =getenv(key); 184 185if(!trace || !strcmp(trace,"") || 186!strcmp(trace,"0") || !strcasecmp(trace,"false")) 187return0; 188return1; 189}