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use %m printf specifier where appropriate

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function                                             old     new   delta
out                                                   85      75     -10
udhcpd_main                                         1472    1461     -11
open_stdio_to_tty                                     98      85     -13
init_exec                                            245     232     -13
udhcpc_main                                         2763    2749     -14
do_cmd                                              4771    4755     -16
status_line_bold_errno                                32      14     -18
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(add/remove: 0/0 grow/shrink: 0/7 up/down: 0/-95)             Total: -95 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-09-29 18:17:25 +02:00
parent f625836e60
commit 6f97b30a90
9 changed files with 25 additions and 19 deletions
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11
include/libbb.h
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@@ -162,6 +162,17 @@
#ifndef HAVE_XTABS
# define XTABS TAB3
#endif
/*
* Use '%m' to append error string on platforms that support it,
* '%s' and strerror() on those that don't.
*/
#ifdef HAVE_PRINTF_PERCENTM
# define STRERROR_FMT "%m"
# define STRERROR_ERRNO /*nothing*/
#else
# define STRERROR_FMT "%s"
# define STRERROR_ERRNO ,strerror(errno)
#endif
/* Some libc's forget to declare these, do it ourself */