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authorRon Yorston2017-07-27 13:53:39 +0100
committerDenys Vlasenko2017-07-28 15:39:26 +0200
commitbe366e5afac1d9f5b3958bd3899a389308d5d9d3 (patch)
tree60c41a15eed758d0cee5a637c063fe53eff36046 /include
parent619d9b5e6848a72350126ea9c1e413fd133181e3 (diff)
downloadbusybox-be366e5afac1d9f5b3958bd3899a389308d5d9d3.zip
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ash: support platforms that don't have '%m' printf specifier
The '%m' conversion specifier prints an error message based on the current value of 'errno'. It is available in the GNU C library, Cygwin (since 2012), uClibc and musl. It is not available in various BSDs, BSD-derived systems (MacOS, Android) or Microsoft Windows. Use a symbol defined in platform.h to control how error messages can be formatted to display the 'errno' message. On platforms that support it use '%m'; on other platforms use '%s' and strerror(). On platforms that have '%m' there is essentially no change in the size of the binary. Otherwise: function old new delta redirect 1287 1310 +23 xtcsetpgrp 27 44 +17 dup2_or_raise 34 51 +17 setinputfile 267 275 +8 .rodata 163379 163371 -8 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/1 up/down: 65/-8) Total: 57 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'include')
-rw-r--r--include/platform.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/platform.h b/include/platform.h
index ea49c7e..b81c59d 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -406,6 +406,7 @@ typedef unsigned smalluint;
#define HAVE_MNTENT_H 1
#define HAVE_NET_ETHERNET_H 1
#define HAVE_SYS_STATFS_H 1
+#define HAVE_PRINTF_PERCENTM 1
#if defined(__UCLIBC__)
# if UCLIBC_VERSION < KERNEL_VERSION(0, 9, 32)
@@ -461,6 +462,7 @@ typedef unsigned smalluint;
# undef HAVE_DPRINTF
# undef HAVE_UNLOCKED_STDIO
# undef HAVE_UNLOCKED_LINE_OPS
+# undef HAVE_PRINTF_PERCENTM
#endif
#if defined(__dietlibc__)
@@ -483,6 +485,7 @@ typedef unsigned smalluint;
# undef HAVE_STRVERSCMP
# undef HAVE_XTABS
# undef HAVE_UNLOCKED_LINE_OPS
+# undef HAVE_PRINTF_PERCENTM
# include <osreldate.h>
# if __FreeBSD_version < 1000029
# undef HAVE_STRCHRNUL /* FreeBSD added strchrnul() between 1000028 and 1000029 */
@@ -517,6 +520,7 @@ typedef unsigned smalluint;
# undef HAVE_STRVERSCMP
# undef HAVE_UNLOCKED_LINE_OPS
# undef HAVE_NET_ETHERNET_H
+# undef HAVE_PRINTF_PERCENTM
#endif
/*