2 * Copyright (c) 1999-2017 The strace developers.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include "error_prints.h"
40 extern char *program_invocation_name;
43 verror_msg(int err_no, const char *fmt, va_list p)
49 /* We want to print entire message with single fprintf to ensure
50 * message integrity if stderr is shared with other programs.
51 * Thus we use vasprintf + single fprintf.
54 if (vasprintf(&msg, fmt, p) >= 0) {
56 fprintf(stderr, "%s: %s: %s\n",
57 program_invocation_name, msg, strerror(err_no));
59 fprintf(stderr, "%s: %s\n",
60 program_invocation_name, msg);
63 /* malloc in vasprintf failed, try it without malloc */
64 fprintf(stderr, "%s: ", program_invocation_name);
65 vfprintf(stderr, fmt, p);
67 fprintf(stderr, ": %s\n", strerror(err_no));
71 /* We don't switch stderr to buffered, thus fprintf(stderr)
72 * always flushes its output and this is not necessary: */
77 error_msg(const char *fmt, ...)
81 verror_msg(0, fmt, p);
86 error_msg_and_die(const char *fmt, ...)
90 verror_msg(0, fmt, p);
95 error_msg_and_help(const char *fmt, ...)
100 verror_msg(0, fmt, p);
102 fprintf(stderr, "Try '%s -h' for more information.\n",
103 program_invocation_name);
108 perror_msg(const char *fmt, ...)
112 verror_msg(errno, fmt, p);
117 perror_msg_and_die(const char *fmt, ...)
121 verror_msg(errno, fmt, p);