Mercurial > hg > octave-nkf > gnulib-hg
changeset 4408:84ab196c83d8
Provide the correct errno.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Thu, 26 Jun 2003 11:03:35 +0000 |
parents | 95a2013d54ed |
children | e107cd15c495 |
files | lib/readlink.c |
diffstat | 1 files changed, 14 insertions(+), 2 deletions(-) [+] |
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--- a/lib/readlink.c +++ b/lib/readlink.c @@ -20,16 +20,28 @@ #endif #include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> #if !HAVE_READLINK /* readlink() substitute for systems that don't have a readlink() function, such as DJGPP 2.03 and mingw32. */ +/* The official POSIX return type of readlink() is ssize_t, but since here + we have no declaration in a public header file, we use 'int' as return + type. */ + int -readlink (const char *filename, char *buffer, size_t bufsize) +readlink (const char *path, char *buf, size_t bufsize) { - errno = EINVAL; + struct stat statbuf; + + /* In general we should use lstat() here, not stat(). But on platforms + without symbolic links lstat() - if it exists - would be equivalent to + stat(), therefore we can use stat(). This saves us a configure check. */ + if (stat (path, &statbuf) >= 0) + errno = EINVAL; return -1; }