From 1b2232978fb15321e6f4232889e1c2be9bd1ba9b Mon Sep 17 00:00:00 2001
From: Manos Pitsidianakis <manos@pitsidianak.is>
Date: Fri, 20 Sep 2024 11:59:55 +0300
Subject: [PATCH] Add fnmatch.h

Add fnmatch() function and FNM_* constants.

Documentation:

Header file:
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/fnmatch.h.html

fnmatch() function:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/fnmatch.html

Signed-off-by: Manos Pitsidianakis <manos@pitsidianak.is>

(backport <https://github.com/rust-lang/libc/pull/3937>)
(cherry picked from commit 70de2da72a5ed176628e9d93408d5f7b95230db6)
---
 libc-test/build.rs        | 12 ++++++++++++
 libc-test/semver/unix.txt |  6 ++++++
 src/unix/mod.rs           | 22 ++++++++++++++++++++++
 3 files changed, 40 insertions(+)

diff --git a/libc-test/build.rs b/libc-test/build.rs
index dfa6185195dbc..844a458fcd5a0 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -205,6 +205,7 @@ fn test_apple(target: &str) {
         "errno.h",
         "execinfo.h",
         "fcntl.h",
+        "fnmatch.h",
         "getopt.h",
         "glob.h",
         "grp.h",
@@ -482,6 +483,7 @@ fn test_openbsd(target: &str) {
         "errno.h",
         "execinfo.h",
         "fcntl.h",
+        "fnmatch.h",
         "getopt.h",
         "libgen.h",
         "limits.h",
@@ -793,6 +795,7 @@ fn test_redox(target: &str) {
         "dlfcn.h",
         "errno.h",
         "fcntl.h",
+        "fnmatch.h",
         "grp.h",
         "limits.h",
         "locale.h",
@@ -852,6 +855,7 @@ fn test_solarish(target: &str) {
         "errno.h",
         "execinfo.h",
         "fcntl.h",
+        "fnmatch.h",
         "getopt.h",
         "glob.h",
         "grp.h",
@@ -1092,6 +1096,7 @@ fn test_netbsd(target: &str) {
         "elf.h",
         "errno.h",
         "fcntl.h",
+        "fnmatch.h",
         "getopt.h",
         "libgen.h",
         "limits.h",
@@ -1308,6 +1313,7 @@ fn test_dragonflybsd(target: &str) {
         "errno.h",
         "execinfo.h",
         "fcntl.h",
+        "fnmatch.h",
         "getopt.h",
         "glob.h",
         "grp.h",
@@ -1531,6 +1537,7 @@ fn test_wasi(target: &str) {
         "dirent.h",
         "errno.h",
         "fcntl.h",
+        "fnmatch.h",
         "langinfo.h",
         "limits.h",
         "locale.h",
@@ -1646,6 +1653,7 @@ fn test_android(target: &str) {
                "elf.h",
                "errno.h",
                "fcntl.h",
+               "fnmatch.h",
                "getopt.h",
                "grp.h",
                "ifaddrs.h",
@@ -2145,6 +2153,7 @@ fn test_freebsd(target: &str) {
                 "errno.h",
                 "execinfo.h",
                 "fcntl.h",
+                "fnmatch.h",
                 "getopt.h",
                 "glob.h",
                 "grp.h",
@@ -2762,6 +2771,7 @@ fn test_emscripten(target: &str) {
                "dlfcn.h",
                "errno.h",
                "fcntl.h",
+               "fnmatch.h",
                "glob.h",
                "grp.h",
                "ifaddrs.h",
@@ -3030,6 +3040,7 @@ fn test_neutrino(target: &str) {
         "dlfcn.h",
         "sys/elf.h",
         "fcntl.h",
+        "fnmatch.h",
         "glob.h",
         "grp.h",
         "iconv.h",
@@ -3427,6 +3438,7 @@ fn test_linux(target: &str) {
                "dlfcn.h",
                "elf.h",
                "fcntl.h",
+               "fnmatch.h",
                "getopt.h",
                "glob.h",
                [gnu]: "gnu/libc-version.h",
diff --git a/libc-test/semver/unix.txt b/libc-test/semver/unix.txt
index bb8e319def299..1ada0edd77b5d 100644
--- a/libc-test/semver/unix.txt
+++ b/libc-test/semver/unix.txt
@@ -132,6 +132,11 @@ FD_ZERO
 FILE
 FIOCLEX
 FIONBIO
+FNM_CASEFOLD
+FNM_NOESCAPE
+FNM_NOMATCH
+FNM_PATHNAME
+FNM_PERIOD
 F_DUPFD
 F_DUPFD_CLOEXEC
 F_GETFD
@@ -525,6 +530,7 @@ fgetpos
 fgets
 fileno
 flock
+fnmatch
 fopen
 fork
 fpathconf
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 3f1148043f532..6495a348d9d28 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -313,6 +313,24 @@ pub const ATF_PERM: ::c_int = 0x04;
 pub const ATF_PUBL: ::c_int = 0x08;
 pub const ATF_USETRAILERS: ::c_int = 0x10;
 
+pub const FNM_PERIOD: c_int = 1 << 2;
+pub const FNM_CASEFOLD: c_int = 1 << 4;
+pub const FNM_NOMATCH: c_int = 1;
+
+cfg_if! {
+    if #[cfg(any(
+        target_os = "macos",
+        target_os = "freebsd",
+        target_os = "android",
+    ))] {
+        pub const FNM_PATHNAME: c_int = 1 << 1;
+        pub const FNM_NOESCAPE: c_int = 1 << 0;
+    } else {
+        pub const FNM_PATHNAME: c_int = 1 << 0;
+        pub const FNM_NOESCAPE: c_int = 1 << 1;
+    }
+}
+
 extern "C" {
     pub static in6addr_loopback: in6_addr;
     pub static in6addr_any: in6_addr;
@@ -1580,6 +1598,10 @@ cfg_if! {
    }
 }
 
+extern "C" {
+    pub fn fnmatch(pattern: *const c_char, name: *const c_char, flags: c_int) -> c_int;
+}
+
 cfg_if! {
     if #[cfg(target_env = "newlib")] {
         mod newlib;