linux-kernel - [PATCH 1/1] perf beauty: Don't use 'find ... -printf' as it isn't available in busybox

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Message-ID: <ZWkEeqdmCHMLhLr2@kernel.org>
Date:   Thu, 30 Nov 2023 18:54:02 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Jiri Olsa <jolsa@...nel.org>, linux-perf-users@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/1] perf beauty: Don't use 'find ... -printf' as it isn't
 available in busybox

Namhyung reported:

  I'm seeing a build error on my Alpine linux image which uses busybox +
  musl libc:

    In file included from trace/beauty/arch_errno_names.c:1,
                     from builtin-trace.c:899:
    /build/trace/beauty/generated/arch_errno_name_array.c: In function 'arch_syscalls__strerrno':
    /build/trace/beauty/generated/arch_errno_name_array.c:142:49: error: unused parameter 'arch' [-Werror=unused-parameter]
      142 | const char *arch_syscalls__strerrno(const char *arch, int err)

  It looks like busybox find command doesn't have -printf option

    find: unrecognized: -printf
    , Yesterday 9:16 PM
    ,
    BusyBox v1.36.1 (2023-07-27 17:12:24 UTC) multi-call binary.

    Usage: find [-HL] [PATH]... [OPTIONS] [ACTIONS]

    Search for files and perform actions on them.
    First failed action stops processing of current file.
    Defaults: PATH is current directory, action is '-print'

So just remove it and pipe find's entry to a basename loop to produce
the same result.

Fixes: 0337cf74ccf2a434 ("perf util: Introduce architecture specific errno/name mapping")
Reported-by: Namhyung Kim <namhyung@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Michael Petlan <mpetlan@...hat.com>
Cc: Thomas Richter <tmricht@...ux.vnet.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/trace/beauty/arch_errno_names.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/trace/beauty/arch_errno_names.sh b/tools/perf/trace/beauty/arch_errno_names.sh
index cc09dcaa891e04bb..3ec8781344db13ba 100755
--- a/tools/perf/trace/beauty/arch_errno_names.sh
+++ b/tools/perf/trace/beauty/arch_errno_names.sh
@@ -76,7 +76,7 @@ EoHEADER
 
 # Create list of architectures that have a specific errno.h.
 archlist=""
-for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d -printf "%f\n" | sort -r); do
+for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d | while read arch ; do basename $arch ; done | sort -r); do
 	test -f $toolsdir/arch/$arch/include/uapi/asm/errno.h && archlist="$archlist $arch"
 done
 
-- 
2.41.0