shithub: npe

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add realpath() and ENAMETOOLONG

--- a/include/npe/errno.h

+++ b/include/npe/errno.h

@@ -7,6 +7,7 @@

 	ENOENT = 2,

 	EINVAL = 22,

 	ERANGE = 34,

+	ENAMETOOLONG = 36,

 };

 extern int errno;

--- a/include/npe/stdlib.h

+++ b/include/npe/stdlib.h

@@ -8,5 +8,6 @@

 #define EXIT_FAILURE 1

 int setenv(char *name, char *value, int overwrite);

+char *realpath(char *path, char *buffer);

 #endif

--- a/libnpe/mkfile

+++ b/libnpe/mkfile

@@ -37,6 +37,7 @@

 	mktime.$O\

 	opendir.$O\

 	readdir.$O\

+	realpath.$O\

 	rename.$O\

 	round.$O\

 	setenv.$O\

--- /dev/null

+++ b/libnpe/realpath.c

@@ -1,0 +1,19 @@

+#include <u.h>

+#include <libc.h>

+#include "limits.h"

+

+char *

+realpath(char *path, char *buffer)

+{

+	char *s, p[PATH_MAX];

+	int f;

+

+	s = nil;

+	if((f = open(path, OREAD)) < 0){

+		if(fd2path(f, p, sizeof(p)) == 0)

+			s = buffer == nil ? strdup(p) : strcpy(buffer, p);

+		close(f);

+	}

+

+	return s;

+}