Import sources from 2011-03-30 iso image

sys/src/ape/lib/ap/stdio/fdopen.c

@@ -0,0 +1,33 @@
+/*
+ * Posix stdio -- fdopen
+ */
+#include "iolib.h"
+/*
+ * Open the named file with the given mode, using the given FILE
+ * Legal modes are given below, `additional characters may follow these sequences':
+ * r rb		open to read
+ * w wb		open to write, truncating
+ * a ab		open to write positioned at eof, creating if non-existant
+ * r+ r+b rb+	open to read and write, creating if non-existant
+ * w+ w+b wb+	open to read and write, truncating
+ * a+ a+b ab+	open to read and write, positioned at eof, creating if non-existant.
+ */
+FILE *fdopen(const int fd, const char *mode){
+	FILE *f;
+	for(f=_IO_stream;f!=&_IO_stream[FOPEN_MAX];f++)
+		if(f->state==CLOSED)
+			break;
+	if(f==&_IO_stream[FOPEN_MAX])
+		return NULL;
+	f->fd=fd;
+	if(mode[0]=='a')
+		lseek(f->fd, 0L, 2);
+	if(f->fd==-1) return NULL;
+	f->flags=0;
+	f->state=OPEN;
+	f->buf=0;
+	f->rp=0;
+	f->wp=0;
+	f->lp=0;
+	return f;
+}