Made up for missing getservent() and endservent()

1 files changed, 143 insertions, 0 deletions

diff --git a/missing/getservent.c b/missing/getservent.c
new file mode 100644
index 00000000..c2dc620d
--- /dev/null
+++ b/missing/getservent.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 1983, 1993	The Regents of the University of California.
+ * Copyright (c) 1993 Digital Equipment Corporation.
+ * Copyright (c) 2012 G. Vanem <gvanem@yahoo.no>.
+ * Copyright (c) 2017 Ali Abdulkadir <autostart.ini@gmail.com>.
+ * All rights reserved.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <netdissect-stdinc.h>
+#include <getservent.h>
+
+static FILE *servf = NULL;
+static char line[BUFSIZ+1];
+static struct servent serv;
+static char *serv_aliases[MAXALIASES];
+int _serv_stayopen;
+const char *etc_path(const char *file);
+
+/*
+* Return either "%SYSTEMROOT%\System32\drivers\etc\<file>",
+* $PREFIX/etc/<file> or simply "<file>" if those failed.
+* "<file>" is aka __PATH_SERVICES (aka "services" on Windows and
+* "/etc/services" on other platforms that would need this)
+*/
+const char *etc_path(const char *file)
+{
+    const char *env = getenv(__PATH_SYSROOT);
+    static char path[_MAX_PATH];
+
+    if (!env)
+/*
+* #ifdef _DEBUG
+*   printf("Warning: Environment Variable \"%s\" invalid\nResorting to [CurrentDirectory]/%s\n",
+*       __PATH_SYSROOT, file);
+* #endif
+*/
+        return (file);
+
+    snprintf(path, sizeof(path), "%s%s%s", env, __PATH_ETC_INET, file);
+    return (path);
+}
+
+void
+setservent(int f)
+{
+    if (servf == NULL)
+        servf = fopen(etc_path(__PATH_SERVICES), "r");
+    else
+        rewind(servf);
+    _serv_stayopen |= f;
+}
+
+void
+endservent(void)
+{
+    if (servf) {
+        fclose(servf);
+        servf = NULL;
+    }
+    _serv_stayopen = 0;
+}
+
+struct servent *
+getservent(void)
+{
+    char *p;
+    register char *cp, **q;
+
+    if (servf == NULL && (servf = fopen(etc_path(__PATH_SERVICES), "r")) == NULL)
+        return (NULL);
+
+again:
+    if ((p = fgets(line, BUFSIZ, servf)) == NULL)
+        return (NULL);
+    if (*p == '#')
+        goto again;
+    cp = strpbrk(p, "#\n");
+    if (cp == NULL)
+        goto again;
+    *cp = '\0';
+    serv.s_name = p;
+    p = strpbrk(p, " \t");
+    if (p == NULL)
+        goto again;
+    *p++ = '\0';
+    while (*p == ' ' || *p == '\t')
+        p++;
+    cp = strpbrk(p, ",/");
+    if (cp == NULL)
+        goto again;
+    *cp++ = '\0';
+    serv.s_port = htons((u_short)atoi(p));
+    serv.s_proto = cp;
+    q = serv.s_aliases = serv_aliases;
+    cp = strpbrk(cp, " \t");
+    if (cp != NULL)
+        *cp++ = '\0';
+    while (cp && *cp) {
+        if (*cp == ' ' || *cp == '\t') {
+            cp++;
+            continue;
+        }
+        if (q < &serv_aliases[MAXALIASES - 1])
+            *q++ = cp;
+        cp = strpbrk(cp, " \t");
+        if (cp != NULL)
+            *cp++ = '\0';
+    }
+    *q = NULL;
+    return (&serv);
+}