Initial Alpine Version

1 files changed, 102 insertions, 0 deletions

diff --git a/pith/pipe.c b/pith/pipe.c
new file mode 100644
index 00000000..35549eef
--- /dev/null
+++ b/pith/pipe.c
@@ -0,0 +1,102 @@
+#if !defined(lint) && !defined(DOS)
+static char rcsid[] = "$Id: pipe.c 761 2007-10-23 22:35:18Z hubert@u.washington.edu $";
+#endif
+/*
+ * ========================================================================
+ * Copyright 2006 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * ========================================================================
+ */
+
+#include "../pith/headers.h"
+#include "../pith/pipe.h"
+#include "../pith/status.h"
+
+
+/* Internal prototypes */
+
+
+
+/*
+ * pipe_* functions introduced so out.f, in.f don't need to be used
+ * by whatever's setting up the pipe.  
+ * Should be similar on unix and windows, but since we're faking piping
+ * in windows, closing the write pipe would signify that the child
+ * process can start running.  This makes it possible for PIPE_WRITE
+ * and PIPE_READ flags to be simultaneously set across all platforms.
+ * Unix piping should eventually have NON_BLOCKING_IO stuff rolled up
+ * into it.
+ */
+
+int
+pipe_putc(int c, PIPE_S *syspipe)
+{
+    if(!syspipe || !syspipe->out.f)
+      return -1;
+
+    return(fputc(c, syspipe->out.f));
+}
+
+int
+pipe_puts(char *str, PIPE_S *syspipe)
+{
+    if(!syspipe || !syspipe->out.f)
+      return -1;
+
+    return(fputs(str, syspipe->out.f));
+}
+
+char *
+pipe_gets(char *str, int size, PIPE_S *syspipe)
+{
+    if(!syspipe || !syspipe->in.f)
+      return NULL;
+
+    return(fgets(str, size, syspipe->in.f));
+}
+
+int
+pipe_readc(unsigned char *c, PIPE_S *syspipe)
+{
+    int rv = 0;
+
+    if(!syspipe || !syspipe->in.f)
+      return -1;
+
+    do {
+	errno = 0;
+	clearerr(syspipe->in.f);
+	rv = fread(c, sizeof(unsigned char), (size_t)1, syspipe->in.f);
+    } while(!rv && ferror(syspipe->in.f) && errno == EINTR);
+
+    return(rv);
+}
+
+int
+pipe_writec(int c, PIPE_S *syspipe)
+{
+    unsigned char ch = (unsigned char)c;
+    int rv = 0;
+
+    if(!syspipe || !syspipe->out.f)
+      return -1;
+
+    do
+      rv = fwrite(&ch, sizeof(unsigned char), (size_t)1, syspipe->out.f);
+    while(!rv && ferror(syspipe->out.f) && errno == EINTR);
+
+    return(rv);
+}
+
+
+void
+pipe_report_error(char *errormsg)
+{
+    q_status_message(SM_ORDER, 3, 3, errormsg);
+}