2 * GIT - The information manager from hell
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
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.
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.
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
28 /* Get a trace file descriptor from GIT_TRACE env variable. */
29 static int get_trace_fd(int *need_close
)
31 char *trace
= getenv("GIT_TRACE");
33 if (!trace
|| !strcmp(trace
, "") ||
34 !strcmp(trace
, "0") || !strcasecmp(trace
, "false"))
36 if (!strcmp(trace
, "1") || !strcasecmp(trace
, "true"))
38 if (strlen(trace
) == 1 && isdigit(*trace
))
41 int fd
= open(trace
, O_WRONLY
| O_APPEND
| O_CREAT
, 0666);
44 "Could not open '%s' for tracing: %s\n"
45 "Defaulting to tracing on stderr...\n",
46 trace
, strerror(errno
));
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");
62 static const char err_msg
[] = "Could not trace into fd given by "
63 "GIT_TRACE environment variable";
65 void trace_printf(const char *fmt
, ...)
69 int fd
, len
, need_close
= 0;
71 fd
= get_trace_fd(&need_close
);
76 len
= vsnprintf(buf
, sizeof(buf
), fmt
, ap
);
78 if (len
>= sizeof(buf
))
79 die("unreasonnable trace length");
80 write_or_whine_pipe(fd
, buf
, len
, err_msg
);
86 void trace_argv_printf(const char **argv
, int count
, const char *fmt
, ...)
92 int fd
, len
, need_close
= 0;
94 fd
= get_trace_fd(&need_close
);
99 len
= vsnprintf(buf
, sizeof(buf
), fmt
, ap
);
101 if (len
>= sizeof(buf
))
102 die("unreasonnable trace length");
104 /* Get the argv string. */
105 argv_str
= sq_quote_argv(argv
, count
);
106 argv_len
= strlen(argv_str
);
108 write_or_whine_pipe(fd
, buf
, len
, err_msg
);
109 write_or_whine_pipe(fd
, argv_str
, argv_len
, err_msg
);
110 write_or_whine_pipe(fd
, "\n", 1, err_msg
);