From 6a47f2a7149ec86eb682cc178b3ea7fcf3151564 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Fri, 12 Jul 2019 10:34:04 +0200 Subject: [PATCH] sysctl: add sysctl_writef() helper --- src/shared/sysctl-util.c | 15 +++++++++++++++ src/shared/sysctl-util.h | 1 + 2 files changed, 16 insertions(+) diff --git a/src/shared/sysctl-util.c b/src/shared/sysctl-util.c index 9be4055b37..93bdcf11bf 100644 --- a/src/shared/sysctl-util.c +++ b/src/shared/sysctl-util.c @@ -60,6 +60,21 @@ int sysctl_write(const char *property, const char *value) { return 0; } +int sysctl_writef(const char *property, const char *format, ...) { + _cleanup_free_ char *v = NULL; + va_list ap; + int r; + + va_start(ap, format); + r = vasprintf(&v, format, ap); + va_end(ap); + + if (r < 0) + return -ENOMEM; + + return sysctl_write(property, v); +} + int sysctl_write_ip_property(int af, const char *ifname, const char *property, const char *value) { const char *p; diff --git a/src/shared/sysctl-util.h b/src/shared/sysctl-util.h index d50c6e4381..cb30a97752 100644 --- a/src/shared/sysctl-util.h +++ b/src/shared/sysctl-util.h @@ -11,6 +11,7 @@ char *sysctl_normalize(char *s); int sysctl_read(const char *property, char **value); int sysctl_write(const char *property, const char *value); +int sysctl_writef(const char *propery, const char *format, ...) _printf_(2, 3); int sysctl_read_ip_property(int af, const char *ifname, const char *property, char **ret); int sysctl_write_ip_property(int af, const char *ifname, const char *property, const char *value); -- 2.25.1