From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Fri, 28 Apr 2023 11:42:11 +0000 (+0200)
Subject: enosys: add --list
X-Git-Tag: v2.40-rc1~466^2~4
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7f104027e2a0929e71fa1307dcfe94f5217799a5;p=thirdparty%2Futil-linux.git

enosys: add --list
---

diff --git a/bash-completion/enosys b/bash-completion/enosys
index 4f63e6640a..61aff46c84 100644
--- a/bash-completion/enosys
+++ b/bash-completion/enosys
@@ -8,6 +8,9 @@ _waitpid_module()
 		'-s'|'--syscall')
 			return 0
 			;;
+		'-l'|'--list')
+			return 0
+			;;
 		'-h'|'--help'|'-V'|'--version')
 			return 0
 			;;
@@ -15,6 +18,7 @@ _waitpid_module()
 	case $cur in
 		-*)
 			OPTS="--syscall
+			        --list
 				--help
 				--version"
 			COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
diff --git a/misc-utils/enosys.1.adoc b/misc-utils/enosys.1.adoc
index 189f1488af..9ce272860b 100644
--- a/misc-utils/enosys.1.adoc
+++ b/misc-utils/enosys.1.adoc
@@ -27,6 +27,9 @@ syscalls as would happen when running on old kernels.
 *-s*, *--syscall*::
 Syscall to block. Can be specified multiple times.
 
+*-l*, *--list*::
+List syscalls known to *enosys*.
+
 include::man-common/help-version.adoc[]
 
 == EXIT STATUS
diff --git a/misc-utils/enosys.c b/misc-utils/enosys.c
index 4aedda4b39..83e1847ff5 100644
--- a/misc-utils/enosys.c
+++ b/misc-utils/enosys.c
@@ -84,6 +84,7 @@ static void __attribute__((__noreturn__)) usage(void)
 
 	fputs(USAGE_OPTIONS, out);
 	fputs(_(" -s, --syscall           syscall to block\n"), out);
+	fputs(_(" -l, --list              list known syscalls\n"), out);
 
 	fputs(USAGE_SEPARATOR, out);
 	fprintf(out, USAGE_HELP_OPTIONS(25));
@@ -100,6 +101,7 @@ int main(int argc, char **argv)
 	bool found;
 	static const struct option longopts[] = {
 		{ "syscall", required_argument, NULL, 's' },
+		{ "list",    no_argument,       NULL, 'l' },
 		{ "version", no_argument,       NULL, 'V' },
 		{ "help",    no_argument,       NULL, 'h' },
 		{ 0 }
@@ -107,7 +109,7 @@ int main(int argc, char **argv)
 
 	bool blocked_syscalls[ARRAY_SIZE(syscalls)] = {};
 
-	while ((c = getopt_long (argc, argv, "Vhs:", longopts, NULL)) != -1) {
+	while ((c = getopt_long (argc, argv, "Vhs:l", longopts, NULL)) != -1) {
 		switch (c) {
 		case 's':
 			found = 0;
@@ -121,6 +123,10 @@ int main(int argc, char **argv)
 			if (!found)
 				errx(EXIT_FAILURE, _("Unknown syscall '%s'"), optarg);
 			break;
+		case 'l':
+			for (i = 0; i < ARRAY_SIZE(syscalls); i++)
+				printf("%s\n", syscalls[i].name);
+			return EXIT_SUCCESS;
 		case 'V':
 			print_version(EXIT_SUCCESS);
 		case 'h':