Commit 28585a58bdd0308c516d2b1caee76977283942da
2011-05-14T17:58:08
Add fpurge function
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diff --git a/Makefile b/Makefile
index 94cf55c..5a04ae3 100644
--- a/Makefile
+++ b/Makefile
@@ -27,6 +27,7 @@ LIB_SRCS := \
err.c \
fgetln.c \
flopen.c \
+ fpurge.c \
getpeereid.c \
heapsort.c \
merge.c \
diff --git a/Versions b/Versions
index 619da34..fde5a8a 100644
--- a/Versions
+++ b/Versions
@@ -86,5 +86,7 @@ LIBBSD_0.3 {
mergesort;
radixsort;
sradixsort;
+
+ fpurge;
} LIBBSD_0.2;
diff --git a/include/bsd/stdio.h b/include/bsd/stdio.h
index dfde0c3..cdf4e50 100644
--- a/include/bsd/stdio.h
+++ b/include/bsd/stdio.h
@@ -1,5 +1,5 @@
/*
- * Copyright © 2004, 2005, 2009 Guillem Jover
+ * Copyright © 2004, 2005, 2009, 2011 Guillem Jover
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -40,6 +40,8 @@ __BEGIN_DECLS
const char *fmtcheck(const char *, const char *);
char *fgetln(FILE *fp, size_t *lenp);
+
+int fpurge(FILE *fp);
__END_DECLS
#endif
diff --git a/src/fpurge.c b/src/fpurge.c
new file mode 100644
index 0000000..19d6537
--- /dev/null
+++ b/src/fpurge.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright © 2011 Guillem Jover
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define _GNU_SOURCE 1
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+
+#ifdef __GLIBC__
+int
+fpurge(FILE *fp)
+{
+ if (fp == NULL || fileno(fp) < 0) {
+ errno = EBADF;
+ return EOF;
+ }
+
+ __fpurge(fp);
+
+ return 0;
+}
+#else
+#error "Function fpurge() needs to be ported."
+#endif
+
+#ifdef TEST
+int
+main()
+{
+ static FILE fp_bad;
+ FILE *fp;
+
+ if (fpurge(&fp_bad) == 0)
+ return 1;
+
+ fp = fopen("/dev/zero", "r");
+ if (fpurge(fp) < 0)
+ return 1;
+
+ fclose(fp);
+
+ return 0;
+}
+#endif