modem/msm-modem: embed keepfileopen utility

This is only used in this program, so we can have one less package

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7495>

modem/msm-modem/APKBUILD

@@ -1,5 +1,5 @@
 pkgname=msm-modem
-pkgver=10
+pkgver=11
 pkgrel=0
 pkgdesc="Common support for Qualcomm MSM modems"
 url="https://postmarketos.org/"
@@ -16,6 +16,7 @@ subpackages="
 "
 
 source="
+	keepfileopen.c
 	msm-modem-downstream.initd
 	msm-modem-uim-selection
 	msm-modem-uim-selection.confd
@@ -26,9 +27,15 @@ source="
 "
 options="!check"
 
+build() {
+	gcc -o keepfileopen "$srcdir"/keepfileopen.c
+}
+
 package() {
 	install -Dm755 "$srcdir"/msm-modem-uim-selection \
 		-t "$pkgdir"/usr/libexec/
+	install -Dm755 keepfileopen \
+		-t "$pkgdir"/usr/bin/
 
 	install -Dm644 "$srcdir"/msm-modem-uim-selection.service \
 		-t "$pkgdir"/usr/lib/systemd/system/
@@ -56,7 +63,9 @@ uim_selection_openrc() {
 
 downstream() {
 	pkgdesc="$pkgdesc (downstream)"
-	depends="$pkgname libqipcrtr4msmipc libsmdpkt_wrapper keepfileopen"
+	depends="$pkgname libqipcrtr4msmipc libsmdpkt_wrapper"
+
+	amove usr/bin/keepfileopen
 
 	install -Dm644 "$srcdir/udev-downstream.rules" "$subpkgdir/usr/lib/udev/rules.d/55-$pkgname.rules"
 }
@@ -79,6 +88,7 @@ openrc() {
 }
 
 sha512sums="
+ac9ed0f6ec07ef813ce3a539919acbe8a5a70d5765a5fff267674a3fb239cdb1dba58a14d72a64f990bdcb87c6476d30ef7add21f152df7cb48e36932ef14dbb  keepfileopen.c
 3172f8c409f552f13d1da29f14ab6c79072cd6da4acab151a1a0ea1858a416974456852609f14fe29cf97a6a45e60b99d0a57ddcde751da243ee5ac6fa8b672c  msm-modem-downstream.initd
 cea8a74d705a53e0f8a5d5da11f3ffc8ba25410906c4fe048617cb5a0d18b86070129d51fc7d6ec90906abe0d0e1dc2df1b19206824eb106237af2c9737544a6  msm-modem-uim-selection
 abc985c76170601a22a1d5ab0c68bdf63fa2be2796593048ea3ba0d7e5cd26b2fcee2043703e46c2910c53b01e9e8092b7a8e715d57baf243a5f4612dd595443  msm-modem-uim-selection.confd

modem/msm-modem/keepfileopen.c

@@ -0,0 +1,19 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+	if (argc != 2) {
+		fprintf(stderr, "Usage: keepfileopen <file>\n");
+		return EXIT_FAILURE;
+	}
+
+	if (open(argv[1], O_RDONLY) < 0) {
+		perror("Failed to open file");
+		return EXIT_FAILURE;
+	}
+
+	pause();
+	return EXIT_SUCCESS;
+}