From 6d9d48a77e76851362ade3e441e1e993c83ef3f8 Mon Sep 17 00:00:00 2001
From: Guo Wenxue <guowenxue@gmail.com>
Date: Sat, 10 Nov 2018 14:28:40 +0800
Subject: [PATCH] Add rlimit.c sample code
---
ch3_fork/rlimit.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/ch3_fork/rlimit.c b/ch3_fork/rlimit.c
new file mode 100644
index 0000000..367adb7
--- /dev/null
+++ b/ch3_fork/rlimit.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/resource.h>
+
+void print_limits(char* name, int resource)
+{
+ struct rlimit limit;
+ if(getrlimit(resource, &limit) <0)
+ {
+ printf("getrlimit for %s failure: %s\n", strerror(errno));
+ return ;
+ }
+
+ printf("%-15s ",name);
+ if(limit.rlim_cur == RLIM_INFINITY)
+ {
+ printf("(infinite) ");
+ }
+ else
+ {
+ printf("%-15ld",limit.rlim_cur);
+ }
+
+ if(limit.rlim_max == RLIM_INFINITY)
+ {
+ printf("(infinite) ");
+ }else
+ {
+ printf("%-15ld",limit.rlim_max);
+ }
+ printf("\n");
+}
+
+int main(void)
+{
+ struct rlimit limit = {0};
+
+ print_limits("RLIMIT_NPROC", RLIMIT_NPROC);
+ print_limits("RLIMIT_DATA", RLIMIT_DATA);
+ print_limits("RLIMIT_STACK", RLIMIT_STACK);
+ print_limits("RLIMIT_NOFILE", RLIMIT_NOFILE);
+
+ printf("\nAfter set RLIMIT_NOFILE:\n");
+ getrlimit(RLIMIT_NOFILE, &limit );
+ limit.rlim_cur = limit.rlim_max;
+ setrlimit(RLIMIT_NOFILE, &limit );
+
+ print_limits("RLIMIT_NOFILE", RLIMIT_NOFILE);
+
+ return 0;
+}
--
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