Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 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 | |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 28 | /* Get a trace file descriptor from GIT_TRACE env variable. */ |
| 29 | static int get_trace_fd(int *need_close) |
| 30 | { |
| 31 | char *trace = getenv("GIT_TRACE"); |
| 32 | |
Christian Couder | 6844fc8 | 2006-10-14 16:05:25 +0200 | [diff] [blame] | 33 | if (!trace || !strcmp(trace, "") || |
| 34 | !strcmp(trace, "0") || !strcasecmp(trace, "false")) |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 35 | return 0; |
| 36 | if (!strcmp(trace, "1") || !strcasecmp(trace, "true")) |
| 37 | return STDERR_FILENO; |
| 38 | if (strlen(trace) == 1 && isdigit(*trace)) |
| 39 | return atoi(trace); |
Steffen Prohaska | ecf4831 | 2007-11-25 23:29:03 +0100 | [diff] [blame] | 40 | if (is_absolute_path(trace)) { |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 41 | int fd = open(trace, O_WRONLY | O_APPEND | O_CREAT, 0666); |
| 42 | if (fd == -1) { |
| 43 | fprintf(stderr, |
| 44 | "Could not open '%s' for tracing: %s\n" |
| 45 | "Defaulting to tracing on stderr...\n", |
| 46 | trace, strerror(errno)); |
| 47 | return STDERR_FILENO; |
| 48 | } |
| 49 | *need_close = 1; |
| 50 | return fd; |
| 51 | } |
| 52 | |
| 53 | fprintf(stderr, "What does '%s' for GIT_TRACE means ?\n", trace); |
| 54 | fprintf(stderr, "If you want to trace into a file, " |
| 55 | "then please set GIT_TRACE to an absolute pathname " |
| 56 | "(starting with /).\n"); |
| 57 | fprintf(stderr, "Defaulting to tracing on stderr...\n"); |
| 58 | |
| 59 | return STDERR_FILENO; |
| 60 | } |
| 61 | |
| 62 | static const char err_msg[] = "Could not trace into fd given by " |
| 63 | "GIT_TRACE environment variable"; |
| 64 | |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 65 | void trace_printf(const char *fmt, ...) |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 66 | { |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 67 | struct strbuf buf; |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 68 | va_list ap; |
| 69 | int fd, len, need_close = 0; |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 70 | |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 71 | fd = get_trace_fd(&need_close); |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 72 | if (!fd) |
| 73 | return; |
| 74 | |
Shawn O. Pearce | f141bd8 | 2007-11-13 03:22:44 -0500 | [diff] [blame] | 75 | strbuf_init(&buf, 64); |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 76 | va_start(ap, fmt); |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 77 | len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap); |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 78 | va_end(ap); |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 79 | if (len >= strbuf_avail(&buf)) { |
| 80 | strbuf_grow(&buf, len - strbuf_avail(&buf) + 128); |
| 81 | va_start(ap, fmt); |
| 82 | len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap); |
| 83 | va_end(ap); |
| 84 | if (len >= strbuf_avail(&buf)) |
| 85 | die("broken vsnprintf"); |
| 86 | } |
| 87 | strbuf_setlen(&buf, len); |
| 88 | |
| 89 | write_or_whine_pipe(fd, buf.buf, buf.len, err_msg); |
| 90 | strbuf_release(&buf); |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 91 | |
| 92 | if (need_close) |
| 93 | close(fd); |
| 94 | } |
| 95 | |
Christian Couder | b319ce4 | 2007-12-03 05:51:50 +0100 | [diff] [blame] | 96 | void trace_argv_printf(const char **argv, const char *fmt, ...) |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 97 | { |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 98 | struct strbuf buf; |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 99 | va_list ap; |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 100 | int fd, len, need_close = 0; |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 101 | |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 102 | fd = get_trace_fd(&need_close); |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 103 | if (!fd) |
| 104 | return; |
| 105 | |
Shawn O. Pearce | f141bd8 | 2007-11-13 03:22:44 -0500 | [diff] [blame] | 106 | strbuf_init(&buf, 64); |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 107 | va_start(ap, fmt); |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 108 | len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap); |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 109 | va_end(ap); |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 110 | if (len >= strbuf_avail(&buf)) { |
| 111 | strbuf_grow(&buf, len - strbuf_avail(&buf) + 128); |
| 112 | va_start(ap, fmt); |
| 113 | len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap); |
| 114 | va_end(ap); |
| 115 | if (len >= strbuf_avail(&buf)) |
| 116 | die("broken vsnprintf"); |
| 117 | } |
| 118 | strbuf_setlen(&buf, len); |
Pierre Habouzit | 19247e5 | 2007-09-20 10:43:11 +0200 | [diff] [blame] | 119 | |
Christian Couder | b319ce4 | 2007-12-03 05:51:50 +0100 | [diff] [blame] | 120 | sq_quote_argv(&buf, argv, 0); |
Pierre Habouzit | 7a33bcb | 2007-09-20 00:42:13 +0200 | [diff] [blame] | 121 | strbuf_addch(&buf, '\n'); |
| 122 | write_or_whine_pipe(fd, buf.buf, buf.len, err_msg); |
| 123 | strbuf_release(&buf); |
Christian Couder | 6ce4e61 | 2006-09-02 18:23:48 +0200 | [diff] [blame] | 124 | |
| 125 | if (need_close) |
| 126 | close(fd); |
| 127 | } |