From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Thu, 29 Sep 2016 12:56:27 +0000 (+0300)
Subject: Add function for getting errno string
X-Git-Tag: v4.14~14
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6fdb10455a7215f736a7dc1fc424376d4159a18b;p=strace

Add function for getting errno string

* defs.h (err_name): New prototype.
* syscall.c (err_name): New function.
---

diff --git a/defs.h b/defs.h
index b2d7da97..ff133a56 100644
--- a/defs.h
+++ b/defs.h
@@ -453,6 +453,7 @@ extern void clear_regs(void);
 extern void get_regs(pid_t pid);
 extern int get_scno(struct tcb *tcp);
 extern const char *syscall_name(long scno);
+extern const char *err_name(unsigned long err);
 
 extern bool is_erestart(struct tcb *);
 extern void temporarily_clear_syserror(struct tcb *);
diff --git a/syscall.c b/syscall.c
index 5c9b034d..a4eb5cd1 100644
--- a/syscall.c
+++ b/syscall.c
@@ -767,6 +767,15 @@ syscall_name(long scno)
 	}
 }
 
+const char *
+err_name(unsigned long err)
+{
+	if ((err < nerrnos) && errnoent[err])
+		return errnoent[err];
+
+	return NULL;
+}
+
 static long get_regs_error;
 
 void