Back out errno preserving

lib/libc/stdlib/atof.3

@@ -64,8 +64,6 @@ It is equivalent to:
 strtod(nptr, (char **)NULL);
 .Ed
 .Pp
-except the handling of errors.
-.Pp
 The decimal point
 character is defined in the program's locale (category
 .Dv LC_NUMERIC ) .
@@ -80,9 +78,9 @@ function has been deprecated by
 .Fn strtod
 and should not be used in new code.
 .Sh ERRORS
-The
+The function
 .Fn atof
-function does not detect errors.
+need not affect the value of errno on an error.
 .Sh SEE ALSO
 .Xr atoi 3 ,
 .Xr atol 3 ,

lib/libc/stdlib/atof.c

@@ -37,18 +37,11 @@
 static char sccsid[] = "@(#)atof.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 
-#include <errno.h>
 #include <stdlib.h>
 
 double
 atof(ascii)
 	const char *ascii;
 {
-	double r;
-	int saverr;
-
-	saverr = errno;
-	r = strtod(ascii, (char **)NULL);
-	errno = saverr;
-	return r;
+	return strtod(ascii, (char **)NULL);
 }

lib/libc/stdlib/atoi.3

@@ -63,8 +63,6 @@ It is equivalent to:
 .Bd -literal -offset indent
 (int)strtol(nptr, (char **)NULL, 10);
 .Ed
-.Pp
-except the handling of errors.
 .Sh IMPLEMENTATION NOTES
 The
 .Fn atoi
@@ -76,9 +74,9 @@ function has been deprecated by
 .Fn strtol
 and should not be used in new code.
 .Sh ERRORS
-The
+The function
 .Fn atoi
-function does not detect errors.
+need not affect the value of errno on an error.
 .Sh SEE ALSO
 .Xr atof 3 ,
 .Xr atol 3 ,

lib/libc/stdlib/atoi.c

@@ -37,17 +37,11 @@
 static char sccsid[] = "@(#)atoi.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 
-#include <errno.h>
 #include <stdlib.h>
 
 int
 atoi(str)
 	const char *str;
 {
-	int r, saverr;
-
-	saverr = errno;
-	r = (int)strtol(str, (char **)NULL, 10);
-	errno = saverr;
-	return r;
+	return (int)strtol(str, (char **)NULL, 10);
 }

lib/libc/stdlib/atol.3

@@ -70,8 +70,6 @@ It is equivalent to:
 .Pp
 .Dl "strtol(nptr, (char **)NULL, 10);"
 .Pp
-except the handling of errors.
-.Pp
 The
 .Fn atoll
 function converts the initial portion of the string pointed to by
@@ -84,15 +82,13 @@ representation.
 It is equivalent to:
 .Pp
 .Dl "strtoll(nptr, (char **)NULL, 10);"
-.Pp
-except the handling of errors.
 .Sh ERRORS
-The
+The functions
 .Fn atol
-function does not detect errors.
-The
+and
 .Fn atoll
-function does not detect errors.
+need not
+affect the value of errno on an error.
 .Sh SEE ALSO
 .Xr atof 3 ,
 .Xr atoi 3 ,

lib/libc/stdlib/atol.c

@@ -37,18 +37,11 @@
 static char sccsid[] = "@(#)atol.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 
-#include <errno.h>
 #include <stdlib.h>
 
 long
 atol(str)
 	const char *str;
 {
-	long r;
-	int saverr;
-
-	saverr = errno;
-	r = strtol(str, (char **)NULL, 10);
-	errno = saverr;
-	return r;
+	return strtol(str, (char **)NULL, 10);
 }

lib/libc/stdlib/atoll.c

@@ -33,18 +33,11 @@
  * $FreeBSD$
  */
 
-#include <errno.h>
 #include <stdlib.h>
 
 long long
 atoll(str)
 	const char *str;
 {
-	long long r;
-	int saverr;
-
-	saverr = errno;
-	r = strtoll(str, (char **)NULL, 10);
-	errno = saverr;
-	return r;
+	return strtoll(str, (char **)NULL, 10);
 }