Add a check for libosl to configure.ac.

[paraslash.git] / stdin.c

diff --git a/stdin.c b/stdin.c
index d33be3588b9211c8efa4a98991c9a6bd1b1ce2ca..fea30dd90ca0e493bb6f4ce54f1515ea072761dc 100644 (file)
--- a/stdin.c
+++ b/stdin.c
@@ -1,3 +1,15 @@
+/*
+ * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file stdin.c Functions that deal with reading from stdin. */
+
+#include <dirent.h> /* readdir() */
+#include <assert.h>
+
+

 #include "para.h"
 #include "string.h"
 #include "list.h"
 #include "para.h"
 #include "string.h"
 #include "list.h"


@@ -6,50 +18,87 @@
 #include "error.h"
 #include "stdin.h"
 
 #include "error.h"
 #include "stdin.h"
 

-void stdin_pre_select(struct sched *s, struct task *t)
+/**
+ * The pre_select function of the stdin task.
+ *
+ * \param s The scheduler this task was registered to.
+ * \param t The task structure of the stdin task.
+ *
+ * This function is always successful. If there is space left in the
+ * buffer of the stdin task, it adds \p STDIN_FILENO to the read fd set
+ * of \a s.
+ */
+static void stdin_pre_select(struct sched *s, struct task *t)

 {
 {

-       struct stdin_task *sit = t->private_data;
-       if (sit->loaded < sit->bufsize)
-               para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
-       t->ret = 1; /* success */
-}
+       struct stdin_task *sit = container_of(t, struct stdin_task, task);

 
 

-static void stdin_default_event_handler(struct task *t)
-{
-       PARA_NOTICE_LOG("%p: %s\n", t, PARA_STRERROR(-t->ret));
-       unregister_task(t);
+       if (sit->output_error && *sit->output_error < 0) {
+               t->error = *sit->output_error;
+               return;
+       }
+       t->error = 0;
+       sit->check_fd = 0;
+       if (sit->loaded >= sit->bufsize)
+               return;
+       sit->check_fd = 1;
+       para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);

 }
 
 }
 

-void stdin_post_select(struct sched *s, struct task *t)
+/**
+ * The post select function of the stdin task.
+ *
+ * \param s The scheduler this task was registered to.
+ * \param t The task structure of the stdin task.
+ *
+ * This function checks if \p STDIN_FILENO was included by in the read fd set
+ * of \a s during the previous pre_select call.  If yes, and \p STDIN_FILENO
+ * appears to be readable, data is read from stdin into the buffer of the
+ * stdin task.
+ */
+static void stdin_post_select(struct sched *s, struct task *t)

 {
 {

-       struct stdin_task *sit = t->private_data;
+       struct stdin_task *sit = container_of(t, struct stdin_task, task);

        ssize_t ret;
 
        ssize_t ret;
 

-       t->ret = 1;
-       if (sit->loaded >= sit->bufsize)
+       if (sit->output_error && *sit->output_error < 0) {
+               t->error = *sit->output_error;
+               return;
+       }
+       t->error = 0;
+       if (!sit->check_fd)

                return;
        if (!FD_ISSET(STDIN_FILENO, &s->rfds))
                return;
        ret = read(STDIN_FILENO, sit->buf + sit->loaded, sit->bufsize - sit->loaded);
        if (ret < 0)
                return;
        if (!FD_ISSET(STDIN_FILENO, &s->rfds))
                return;
        ret = read(STDIN_FILENO, sit->buf + sit->loaded, sit->bufsize - sit->loaded);
        if (ret < 0)

-               t->ret = -E_STDIN_READ;
-       else if (ret > 0) {
+               t->error = ERRNO_TO_PARA_ERROR(errno);
+       else if (ret > 0)

                sit->loaded += ret;
                sit->loaded += ret;

-               t->ret = ret;
-       } else
-               t->ret = -E_STDIN_EOF;
-       if (t->ret < 0)
-               sit->eof = 1;
+       else
+               t->error = -E_STDIN_EOF;

 }
 
 }
 

+/**
+ * Initialize a stdin task structure with default values.
+ *
+ * \param sit The stdin task structure.
+ *
+ * This fills in the pre/post select function pointers of the task structure
+ * given by \a sit. Moreover, the stdin file desctiptor is set to nonblocking
+ * mode and \a bufsize is initialized to 16 KB (but no buffer is allocated).
+ */

 void stdin_set_defaults(struct stdin_task *sit)
 {
 void stdin_set_defaults(struct stdin_task *sit)
 {

+       int ret;
+

        sit->bufsize = 16 * 1024,
        sit->bufsize = 16 * 1024,

-       sit->loaded = 0,
-       sit->eof = 0,

        sit->task.pre_select = stdin_pre_select;
        sit->task.post_select = stdin_post_select;
        sit->task.pre_select = stdin_pre_select;
        sit->task.post_select = stdin_post_select;

-       sit->task.event_handler = stdin_default_event_handler;
-       sit->task.private_data = sit;

        sprintf(sit->task.status, "stdin reader");
        sprintf(sit->task.status, "stdin reader");

+       ret = mark_fd_nonblocking(STDIN_FILENO);
+       if (ret >= 0)
+               return;
+       sit->output_error = NULL;
+       PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+       exit(EXIT_FAILURE);

 }
 }