added compat module and functions

Signed-off-by: lns <matzeton@googlemail.com>

1 files changed, 104 insertions, 0 deletions

diff --git a/src/compat.c b/src/compat.c
new file mode 100644
index 0000000..72c78a3
--- /dev/null
+++ b/src/compat.c
@@ -0,0 +1,104 @@
+/*
+ * compat.c
+ * potd is licensed under the BSD license:
+ *
+ * Copyright (c) 2018 Toni Uhlig <matzeton@googlemail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - The names of its contributors may not be used to endorse or promote
+ *   products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "compat.h"
+
+
+char *
+potd_strtok(char *str, const char *delim, char **saveptr)
+{
+#ifdef HAVE_STRTOK_R
+    return strtok_r(str, delim, saveptr);
+#else
+    (void) saveptr;
+
+    return strtok(str, delim);
+#endif
+}
+
+struct tm *
+potd_localtime(const time_t *timep, struct tm *result)
+{
+#ifdef HAVE_LOCALTIME_R
+    return localtime_r(timep, result);
+#else
+    (void) result;
+
+    return localtime(timep);
+#endif
+}
+
+int
+potd_getpwnam(const char *name, struct passwd *pwd)
+{
+    struct passwd *result = NULL;
+
+    errno = 0;
+#ifdef HAVE_GETPWNAM_R
+    char buf[BUFSIZ];
+
+    return getpwnam_r(name, pwd, buf, sizeof buf, &result) || !result;
+#else
+    result = getpwnam(name);
+    if (result)
+        *pwd = *result;
+
+    return result == NULL;
+#endif
+}
+
+int
+potd_getgrnam(const char *name, struct group *grp)
+{
+    struct group *result = NULL;
+
+    errno = 0;
+#ifdef HAVE_GETGRNAM_R
+    char buf[BUFSIZ];
+
+    return getgrnam_r(name, grp, buf, sizeof buf, &result) || !result;
+#else
+    result = getgrnam(name);
+    if (result)
+        *grp = *result;
+
+    return result == NULL;
+#endif
+}