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 GIT_TRACE env variable. */ 29static intget_trace_fd(int*need_close) 30{ 31char*trace =getenv("GIT_TRACE"); 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 GIT_TRACE mean?\n", trace); 54fprintf(stderr,"If you want to trace into a file, " 55"then please set GIT_TRACE to an absolute pathname " 56"(starting with /).\n"); 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 65voidtrace_vprintf(const char*fmt,va_list ap) 66{ 67struct strbuf buf = STRBUF_INIT; 68int fd, need_close =0; 69 70 fd =get_trace_fd(&need_close); 71if(!fd) 72return; 73 74set_try_to_free_routine(NULL);/* is never reset */ 75strbuf_vaddf(&buf, fmt, ap); 76write_or_whine_pipe(fd, buf.buf, buf.len, err_msg); 77strbuf_release(&buf); 78 79if(need_close) 80close(fd); 81} 82 83voidtrace_printf(const char*fmt, ...) 84{ 85va_list ap; 86va_start(ap, fmt); 87trace_vprintf(fmt, ap); 88va_end(ap); 89} 90 91voidtrace_argv_printf(const char**argv,const char*fmt, ...) 92{ 93struct strbuf buf = STRBUF_INIT; 94va_list ap; 95int fd, need_close =0; 96 97 fd =get_trace_fd(&need_close); 98if(!fd) 99return; 100 101set_try_to_free_routine(NULL);/* is never reset */ 102va_start(ap, fmt); 103strbuf_vaddf(&buf, fmt, ap); 104va_end(ap); 105 106sq_quote_argv(&buf, argv,0); 107strbuf_addch(&buf,'\n'); 108write_or_whine_pipe(fd, buf.buf, buf.len, err_msg); 109strbuf_release(&buf); 110 111if(need_close) 112close(fd); 113} 114 115static const char*quote_crnl(const char*path) 116{ 117static char new_path[PATH_MAX]; 118const char*p2 = path; 119char*p1 = new_path; 120 121if(!path) 122return NULL; 123 124while(*p2) { 125switch(*p2) { 126case'\\': *p1++ ='\\'; *p1++ ='\\';break; 127case'\n': *p1++ ='\\'; *p1++ ='n';break; 128case'\r': *p1++ ='\\'; *p1++ ='r';break; 129default: 130*p1++ = *p2; 131} 132 p2++; 133} 134*p1 ='\0'; 135return new_path; 136} 137 138/* FIXME: move prefix to startup_info struct and get rid of this arg */ 139voidtrace_repo_setup(const char*prefix) 140{ 141const char*git_work_tree; 142char cwd[PATH_MAX]; 143char*trace =getenv("GIT_TRACE"); 144 145if(!trace || !strcmp(trace,"") || 146!strcmp(trace,"0") || !strcasecmp(trace,"false")) 147return; 148 149if(!getcwd(cwd, PATH_MAX)) 150die("Unable to get current working directory"); 151 152if(!(git_work_tree =get_git_work_tree())) 153 git_work_tree ="(null)"; 154 155if(!prefix) 156 prefix ="(null)"; 157 158trace_printf("setup: git_dir:%s\n",quote_crnl(get_git_dir())); 159trace_printf("setup: worktree:%s\n",quote_crnl(git_work_tree)); 160trace_printf("setup: cwd:%s\n",quote_crnl(cwd)); 161trace_printf("setup: prefix:%s\n",quote_crnl(prefix)); 162}