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/* Stolen from "imap-send.c". */ 29static intgit_vasprintf(char**strp,const char*fmt,va_list ap) 30{ 31int len; 32char tmp[1024]; 33 34if((len =vsnprintf(tmp,sizeof(tmp), fmt, ap)) <0|| 35!(*strp =xmalloc(len +1))) 36return-1; 37if(len >= (int)sizeof(tmp)) 38vsprintf(*strp, fmt, ap); 39else 40memcpy(*strp, tmp, len +1); 41return len; 42} 43 44/* Stolen from "imap-send.c". */ 45intnfvasprintf(char**str,const char*fmt,va_list va) 46{ 47int ret =git_vasprintf(str, fmt, va); 48if(ret <0) 49die("Fatal: Out of memory\n"); 50return ret; 51} 52 53/* Get a trace file descriptor from GIT_TRACE env variable. */ 54static intget_trace_fd() 55{ 56char*trace =getenv("GIT_TRACE"); 57 58if(!trace || !strcmp(trace,"0") || !strcasecmp(trace," false")) 59return0; 60if(!strcmp(trace,"1") || !strcasecmp(trace,"true")) 61return STDERR_FILENO; 62if(strlen(trace) ==1&&isdigit(*trace)) 63returnatoi(trace); 64 65fprintf(stderr,"What does '%s' for GIT_TRACE means ?\n", trace); 66fprintf(stderr,"Defaulting to tracing on stderr...\n"); 67return STDERR_FILENO; 68} 69 70static const char err_msg[] ="Could not trace into fd given by " 71"GIT_TRACE environment variable"; 72 73voidtrace_printf(const char*format, ...) 74{ 75char*trace_str; 76va_list rest; 77int fd =get_trace_fd(); 78 79if(!fd) 80return; 81 82va_start(rest, format); 83nfvasprintf(&trace_str, format, rest); 84va_end(rest); 85 86write_or_whine(fd, trace_str,strlen(trace_str), err_msg); 87 88free(trace_str); 89} 90 91voidtrace_argv_printf(const char**argv,int count,const char*format, ...) 92{ 93char*argv_str, *format_str, *trace_str; 94size_t argv_len, format_len, trace_len; 95va_list rest; 96int fd =get_trace_fd(); 97 98if(!fd) 99return; 100 101/* Get the argv string. */ 102 argv_str =sq_quote_argv(argv, count); 103 argv_len =strlen(argv_str); 104 105/* Get the formated string. */ 106va_start(rest, format); 107nfvasprintf(&format_str, format, rest); 108va_end(rest); 109 110/* Allocate buffer for trace string. */ 111 format_len =strlen(format_str); 112 trace_len = argv_len + format_len +1;/* + 1 for \n */ 113 trace_str =xmalloc(trace_len +1); 114 115/* Copy everything into the trace string. */ 116strncpy(trace_str, format_str, format_len); 117strncpy(trace_str + format_len, argv_str, argv_len); 118strcpy(trace_str + trace_len -1,"\n"); 119 120write_or_whine(fd, trace_str, trace_len, err_msg); 121 122free(argv_str); 123free(format_str); 124free(trace_str); 125}