tini: Fix compilation with musl libc 1.2.5

Support POSIX basename used in musl libc 1.2.5.

This fixes compilation with musl libc 1.2.5.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/utils/tini/patches/002-Support-POSIX-basename-from-musl-libc.patch b/utils/tini/patches/002-Support-POSIX-basename-from-musl-libc.patch
new file mode 100644 (file)
index 0000000..3fce314
--- /dev/null
+++ b/utils/tini/patches/002-Support-POSIX-basename-from-musl-libc.patch
@@ -0,0 +1,72 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 14 Apr 2024 15:33:51 +0200
+Subject: Support POSIX basename() from musl libc
+
+Musl libc 1.2.5 removed the definition of the basename() function from
+string.h and only provides it in libgen.h as the POSIX standard
+defines it.
+
+This change fixes compilation with musl libc 1.2.5.
+````
+build_dir/target-mips_24kc_musl/tini-0.19.0/src/tini.c:227:36: error: implicit declaration of function 'basename' [-Wimplicit-function-declaration]
+  227 |         fprintf(file, "%s (%s)\n", basename(name), TINI_VERSION_STRING);
+build_dir/target-mips_24kc_musl/tini-0.19.0/src/tini.c:227:25: error: format '%s' expects argument of type 'char *', but argument 3 has type 'int' [-Werror=format=]
+  227 |         fprintf(file, "%s (%s)\n", basename(name), TINI_VERSION_STRING);
+      |                        ~^          ~~~~~~~~~~~~~~
+      |                         |          |
+      |                         char *     int
+      |                        %d
+
+````
+
+basename() modifies the input string, copy it first with strdup(), If
+strdup() returns NULL the code will handle it.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ src/tini.c | 15 +++++++++++----
+ 1 file changed, 11 insertions(+), 4 deletions(-)
+
+--- a/src/tini.c
++++ b/src/tini.c
+@@ -14,6 +14,7 @@
+ #include <stdlib.h>
+ #include <unistd.h>
+ #include <stdbool.h>
++#include <libgen.h>
+ 
+ #include "tiniConfig.h"
+ #include "tiniLicense.h"
+@@ -224,14 +225,19 @@ int spawn(const signal_configuration_t*
+ }
+ 
+ void print_usage(char* const name, FILE* const file) {
+-      fprintf(file, "%s (%s)\n", basename(name), TINI_VERSION_STRING);
++      char *dirc, *bname;
++
++      dirc = strdup(name);
++      bname = basename(dirc);
++
++      fprintf(file, "%s (%s)\n", bname, TINI_VERSION_STRING);
+ 
+ #if TINI_MINIMAL
+-      fprintf(file, "Usage: %s PROGRAM [ARGS] | --version\n\n", basename(name));
++      fprintf(file, "Usage: %s PROGRAM [ARGS] | --version\n\n", bname);
+ #else
+-      fprintf(file, "Usage: %s [OPTIONS] PROGRAM -- [ARGS] | --version\n\n", basename(name));
++      fprintf(file, "Usage: %s [OPTIONS] PROGRAM -- [ARGS] | --version\n\n", bname);
+ #endif
+-      fprintf(file, "Execute a program under the supervision of a valid init process (%s)\n\n", basename(name));
++      fprintf(file, "Execute a program under the supervision of a valid init process (%s)\n\n", bname);
+ 
+       fprintf(file, "Command line options:\n\n");
+ 
+@@ -261,6 +267,7 @@ void print_usage(char* const name, FILE*
+       fprintf(file, "  %s: Send signals to the child's process group.\n", KILL_PROCESS_GROUP_GROUP_ENV_VAR);
+ 
+       fprintf(file, "\n");
++      free(dirc);
+ }
+ 
+ void print_license(FILE* const file) {