Adding upstream version 2.4.57.upstream/2.4.57

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 419 insertions, 0 deletions

diff --git a/os/bs2000/ebcdic.c b/os/bs2000/ebcdic.c
new file mode 100644
index 0000000..7ec0076
--- /dev/null
+++ b/os/bs2000/ebcdic.c
@@ -0,0 +1,210 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ap_config.h"
+#if APR_CHARSET_EBCDIC
+#include "ebcdic.h"
+/*
+           Initial Port for  Apache-1.3 by <Martin.Kraemer Mch.SNI.De>
+
+"BS2000 OSD" is a POSIX on a main frame. It is made by Siemens AG, Germany.
+Within the POSIX subsystem, the same character set was chosen as in
+"native BS2000", namely EBCDIC.
+
+EBCDIC Table. (Yes, in EBCDIC, the letters 'a'..'z' are not contiguous!)
+This apr_table_t is bijective, i.e. there are no ambiguous or duplicate characters
+00    00 01 02 03 85 09 86 7f  87 8d 8e 0b 0c 0d 0e 0f  *................*
+10    10 11 12 13 8f 0a 08 97  18 19 9c 9d 1c 1d 1e 1f  *................*
+20    80 81 82 83 84 92 17 1b  88 89 8a 8b 8c 05 06 07  *................*
+30    90 91 16 93 94 95 96 04  98 99 9a 9b 14 15 9e 1a  *................*
+40    20 a0 e2 e4 e0 e1 e3 e5  e7 f1 60 2e 3c 28 2b 7c  * .........`.<(+|*
+50    26 e9 ea eb e8 ed ee ef  ec df 21 24 2a 29 3b 9f  *&.........!$*);.*
+60    2d 2f c2 c4 c0 c1 c3 c5  c7 d1 5e 2c 25 5f 3e 3f  *-/........^,%_>?*
+70    f8 c9 ca cb c8 cd ce cf  cc a8 3a 23 40 27 3d 22  *..........:#@'="*
+80    d8 61 62 63 64 65 66 67  68 69 ab bb f0 fd fe b1  *.abcdefghi......*
+90    b0 6a 6b 6c 6d 6e 6f 70  71 72 aa ba e6 b8 c6 a4  *.jklmnopqr......*
+a0    b5 af 73 74 75 76 77 78  79 7a a1 bf d0 dd de ae  *..stuvwxyz......*
+b0    a2 a3 a5 b7 a9 a7 b6 bc  bd be ac 5b 5c 5d b4 d7  *...........[\]..*
+c0    f9 41 42 43 44 45 46 47  48 49 ad f4 f6 f2 f3 f5  *.ABCDEFGHI......*
+d0    a6 4a 4b 4c 4d 4e 4f 50  51 52 b9 fb fc db fa ff  *.JKLMNOPQR......*
+e0    d9 f7 53 54 55 56 57 58  59 5a b2 d4 d6 d2 d3 d5  *..STUVWXYZ......*
+f0    30 31 32 33 34 35 36 37  38 39 b3 7b dc 7d da 7e  *0123456789.{.}.~*
+*/
+
+/* The bijective ebcdic-to-ascii table: */
+const unsigned char os_toascii_strictly[256] = {
+/*00*/ 0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f,
+       0x87, 0x8d, 0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /*................*/
+/*10*/ 0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97,
+       0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f, /*................*/
+/*20*/ 0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b,
+       0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, /*................*/
+/*30*/ 0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
+       0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, /*................*/
+/*40*/ 0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5,
+       0xe7, 0xf1, 0x60, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, /* .........`.<(+|*/
+/*50*/ 0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef,
+       0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x9f, /*&.........!$*);.*/
+/*60*/ 0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5,
+       0xc7, 0xd1, 0x5e, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, /*-/........^,%_>?*/
+/*70*/ 0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf,
+       0xcc, 0xa8, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, /*..........:#@'="*/
+/*80*/ 0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+       0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, /*.abcdefghi......*/
+/*90*/ 0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
+       0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4, /*.jklmnopqr......*/
+/*a0*/ 0xb5, 0xaf, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
+       0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0xdd, 0xde, 0xae, /*..stuvwxyz......*/
+/*b0*/ 0xa2, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc,
+       0xbd, 0xbe, 0xac, 0x5b, 0x5c, 0x5d, 0xb4, 0xd7, /*...........[\]..*/
+/*c0*/ 0xf9, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+       0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5, /*.ABCDEFGHI......*/
+/*d0*/ 0xa6, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
+       0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xdb, 0xfa, 0xff, /*.JKLMNOPQR......*/
+/*e0*/ 0xd9, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
+       0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5, /*..STUVWXYZ......*/
+/*f0*/ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+       0x38, 0x39, 0xb3, 0x7b, 0xdc, 0x7d, 0xda, 0x7e  /*0123456789.{.}.~*/
+};
+
+/* This apr_table_t is (almost) identical to the previous one. The only difference
+ * is the fact that it maps every EBCDIC *except 0x0A* to its ASCII
+ * equivalent. The reason for this apr_table_t is simple: Throughout the
+ * server, protocol strings are used in the form
+ *  "Content-Type: text/plain\015\012". Now all the characters in the string
+ * are stored as EBCDIC, only the semantics of \012 is completely
+ * different from LF (look it up in the apr_table_t above). \015 happens to be
+ * mapped to \015 anyway, so there's no special case for it.
+ *
+ * In THIS table, EBCDIC-\012 is mapped to ASCII-\012.
+ * This apr_table_t is therefore used wherever an EBCDIC to ASCII conversion is
+ * needed in the server.
+ */
+/* ebcdic-to-ascii with \012 mapped to ASCII-\n */
+const unsigned char os_toascii[256] = {
+/*00*/ 0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f,
+       0x87, 0x8d, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /*................*/
+/*10*/ 0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97,
+       0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f, /*................*/
+/*20*/ 0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b,
+       0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, /*................*/
+/*30*/ 0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
+       0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, /*................*/
+/*40*/ 0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5,
+       0xe7, 0xf1, 0x60, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, /* .........`.<(+|*/
+/*50*/ 0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef,
+       0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x9f, /*&.........!$*);.*/
+/*60*/ 0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5,
+       0xc7, 0xd1, 0x5e, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, /*-/........^,%_>?*/
+/*70*/ 0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf,
+       0xcc, 0xa8, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, /*..........:#@'="*/
+/*80*/ 0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+       0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, /*.abcdefghi......*/
+/*90*/ 0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
+       0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4, /*.jklmnopqr......*/
+/*a0*/ 0xb5, 0xaf, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
+       0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0xdd, 0xde, 0xae, /*..stuvwxyz......*/
+/*b0*/ 0xa2, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc,
+       0xbd, 0xbe, 0xac, 0x5b, 0x5c, 0x5d, 0xb4, 0xd7, /*...........[\]..*/
+/*c0*/ 0xf9, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+       0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5, /*.ABCDEFGHI......*/
+/*d0*/ 0xa6, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
+       0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xdb, 0xfa, 0xff, /*.JKLMNOPQR......*/
+/*e0*/ 0xd9, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
+       0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5, /*..STUVWXYZ......*/
+/*f0*/ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+       0x38, 0x39, 0xb3, 0x7b, 0xdc, 0x7d, 0xda, 0x7e  /*0123456789.{.}.~*/
+};
+
+/* The ascii-to-ebcdic table:
+00    00 01 02 03 37 2d 2e 2f  16 05 15 0b 0c 0d 0e 0f  *................*
+10    10 11 12 13 3c 3d 32 26  18 19 3f 27 1c 1d 1e 1f  *................*
+20    40 5a 7f 7b 5b 6c 50 7d  4d 5d 5c 4e 6b 60 4b 61  * !"#$%&'()*+,-./
+30    f0 f1 f2 f3 f4 f5 f6 f7  f8 f9 7a 5e 4c 7e 6e 6f  *0123456789:;<=>?*
+40    7c c1 c2 c3 c4 c5 c6 c7  c8 c9 d1 d2 d3 d4 d5 d6  *@ABCDEFGHIJKLMNO*
+50    d7 d8 d9 e2 e3 e4 e5 e6  e7 e8 e9 bb bc bd 6a 6d  *PQRSTUVWXYZ[\]^_*
+60    4a 81 82 83 84 85 86 87  88 89 91 92 93 94 95 96  *`abcdefghijklmno*
+70    97 98 99 a2 a3 a4 a5 a6  a7 a8 a9 fb 4f fd ff 07  *pqrstuvwxyz{|}~.*
+80    20 21 22 23 24 04 06 08  28 29 2a 2b 2c 09 0a 14  *................*
+90    30 31 25 33 34 35 36 17  38 39 3a 3b 1a 1b 3e 5f  *................*
+a0    41 aa b0 b1 9f b2 d0 b5  79 b4 9a 8a ba ca af a1  *................*
+b0    90 8f ea fa be a0 b6 b3  9d da 9b 8b b7 b8 b9 ab  *................*
+c0    64 65 62 66 63 67 9e 68  74 71 72 73 78 75 76 77  *................*
+d0    ac 69 ed ee eb ef ec bf  80 e0 fe dd fc ad ae 59  *................*
+e0    44 45 42 46 43 47 9c 48  54 51 52 53 58 55 56 57  *................*
+f0    8c 49 cd ce cb cf cc e1  70 c0 de db dc 8d 8e df  *................*
+*/
+const unsigned char os_toebcdic[256] = {
+/*00*/  0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f,
+        0x16, 0x05, 0x15, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,  /*................*/
+/*10*/  0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26,
+        0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f,  /*................*/
+/*20*/  0x40, 0x5a, 0x7f, 0x7b, 0x5b, 0x6c, 0x50, 0x7d,
+        0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61,  /* !"#$%&'()*+,-./ */
+/*30*/  0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+        0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f,  /*0123456789:;<=>?*/
+/*40*/  0x7c, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
+        0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,  /*@ABCDEFGHIJKLMNO*/
+/*50*/  0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6,
+        0xe7, 0xe8, 0xe9, 0xbb, 0xbc, 0xbd, 0x6a, 0x6d,  /*PQRSTUVWXYZ[\]^_*/
+/*60*/  0x4a, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+        0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,  /*`abcdefghijklmno*/
+/*70*/  0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
+        0xa7, 0xa8, 0xa9, 0xfb, 0x4f, 0xfd, 0xff, 0x07,  /*pqrstuvwxyz{|}~.*/
+/*80*/  0x20, 0x21, 0x22, 0x23, 0x24, 0x04, 0x06, 0x08,
+        0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x09, 0x0a, 0x14,  /*................*/
+/*90*/  0x30, 0x31, 0x25, 0x33, 0x34, 0x35, 0x36, 0x17,
+        0x38, 0x39, 0x3a, 0x3b, 0x1a, 0x1b, 0x3e, 0x5f,  /*................*/
+/*a0*/  0x41, 0xaa, 0xb0, 0xb1, 0x9f, 0xb2, 0xd0, 0xb5,
+        0x79, 0xb4, 0x9a, 0x8a, 0xba, 0xca, 0xaf, 0xa1,  /*................*/
+/*b0*/  0x90, 0x8f, 0xea, 0xfa, 0xbe, 0xa0, 0xb6, 0xb3,
+        0x9d, 0xda, 0x9b, 0x8b, 0xb7, 0xb8, 0xb9, 0xab,  /*................*/
+/*c0*/  0x64, 0x65, 0x62, 0x66, 0x63, 0x67, 0x9e, 0x68,
+        0x74, 0x71, 0x72, 0x73, 0x78, 0x75, 0x76, 0x77,  /*................*/
+/*d0*/  0xac, 0x69, 0xed, 0xee, 0xeb, 0xef, 0xec, 0xbf,
+        0x80, 0xe0, 0xfe, 0xdd, 0xfc, 0xad, 0xae, 0x59,  /*................*/
+/*e0*/  0x44, 0x45, 0x42, 0x46, 0x43, 0x47, 0x9c, 0x48,
+        0x54, 0x51, 0x52, 0x53, 0x58, 0x55, 0x56, 0x57,  /*................*/
+/*f0*/  0x8c, 0x49, 0xcd, 0xce, 0xcb, 0xcf, 0xcc, 0xe1,
+        0x70, 0xc0, 0xde, 0xdb, 0xdc, 0x8d, 0x8e, 0xdf   /*................*/
+};
+
+/* Translate a memory block from EBCDIC (host charset) to ASCII (net charset)
+ * dest and srce may be identical, or separate memory blocks, but
+ * should not overlap.
+ */
+void
+ebcdic2ascii(unsigned char *dest, const unsigned char *srce, size_t count)
+{
+        while (count-- != 0) {
+                *dest++ = os_toascii[*srce++];
+        }
+}
+void
+ebcdic2ascii_strictly(unsigned char *dest, const unsigned char *srce, size_t count)
+{
+        while (count-- != 0) {
+                *dest++ = os_toascii_strictly[*srce++];
+        }
+}
+void
+ascii2ebcdic(unsigned char *dest, const unsigned char *srce, size_t count)
+{
+        while (count-- != 0) {
+                *dest++ = os_toebcdic[*srce++];
+        }
+}
+#endif /*APR_CHARSET_EBCDIC*/
diff --git a/os/bs2000/ebcdic.h b/os/bs2000/ebcdic.h
new file mode 100644
index 0000000..e48b859
--- /dev/null
+++ b/os/bs2000/ebcdic.h
@@ -0,0 +1,33 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file  bs2000/ebcdic.h
+ * @brief EBCDIC/ASCII converson function declarations
+ *
+ * @addtogroup APACHE_OS_BS2000
+ * @{
+ */
+
+#include <sys/types.h>
+
+extern const unsigned char os_toascii[256];
+extern const unsigned char os_toebcdic[256];
+void ebcdic2ascii(unsigned char *dest, const unsigned char *srce, size_t count);
+void ebcdic2ascii_strictly(unsigned char *dest, const unsigned char *srce, size_t count);
+void ascii2ebcdic(unsigned char *dest, const unsigned char *srce, size_t count);
+/** @} */
+
diff --git a/os/bs2000/os.c b/os/bs2000/os.c
new file mode 100644
index 0000000..199706f
--- /dev/null
+++ b/os/bs2000/os.c
@@ -0,0 +1,136 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * This file will include OS specific functions which are not inlineable.
+ * Any inlineable functions should be defined in os-inline.c instead.
+ */
+
+#ifdef _OSD_POSIX
+
+#include "os.h"
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "apr_lib.h"
+
+#define USER_LEN 8
+
+APLOG_USE_MODULE(core);
+
+typedef enum
+{
+    bs2_unknown,     /* not initialized yet. */
+    bs2_noFORK,      /* no fork() because -X flag was specified */
+    bs2_FORK,        /* only fork() because uid != 0 */
+    bs2_UFORK        /* Normally, ufork() is used to switch identities. */
+} bs2_ForkType;
+
+static bs2_ForkType forktype = bs2_unknown;
+
+/* Determine the method for forking off a child in such a way as to
+ * set both the POSIX and BS2000 user id's to the unprivileged user.
+ */
+static bs2_ForkType os_forktype(int one_process)
+{
+    /* have we checked the OS version before? If yes return the previous
+     * result - the OS release isn't going to change suddenly!
+     */
+    if (forktype == bs2_unknown) {
+        /* not initialized yet */
+
+        /* No fork if the one_process option was set */
+        if (one_process) {
+            forktype = bs2_noFORK;
+        }
+        /* If the user is unprivileged, use the normal fork() only. */
+        else if (getuid() != 0) {
+            forktype = bs2_FORK;
+        }
+        else
+            forktype = bs2_UFORK;
+    }
+    return forktype;
+}
+
+
+
+/* This routine complements the setuid() call: it causes the BS2000 job
+ * environment to be switched to the target user's user id.
+ * That is important if CGI scripts try to execute native BS2000 commands.
+ */
+int os_init_job_environment(server_rec *server, const char *user_name, int one_process)
+{
+    bs2_ForkType            type = os_forktype(one_process);
+
+    /* We can be sure that no change to uid==0 is possible because of
+     * the checks in http_core.c:set_user()
+     */
+
+    if (one_process) {
+
+        type = forktype = bs2_noFORK;
+
+        ap_log_error(APLOG_MARK, APLOG_ERR, 0, server, APLOGNO(02170)
+                     "The debug mode of Apache should only "
+                     "be started by an unprivileged user!");
+        return 0;
+    }
+
+    return 0;
+}
+
+/* BS2000 requires a "special" version of fork() before a setuid() call */
+pid_t os_fork(const char *user)
+{
+    pid_t pid;
+    char  username[USER_LEN+1];
+
+    switch (os_forktype(0)) {
+
+      case bs2_FORK:
+        pid = fork();
+        break;
+
+      case bs2_UFORK:
+        apr_cpystrn(username, user, sizeof username);
+
+        /* Make user name all upper case - for some versions of ufork() */
+        ap_str_toupper(username);
+
+        pid = ufork(username);
+        if (pid == -1 && errno == EPERM) {
+            ap_log_error(APLOG_MARK, APLOG_EMERG, errno, ap_server_conf,
+                         APLOGNO(02171) "ufork: Possible mis-configuration "
+                         "for user %s - Aborting.", user);
+            exit(1);
+        }
+        break;
+
+      default:
+        pid = 0;
+        break;
+    }
+
+    return pid;
+}
+
+#else /* _OSD_POSIX */
+void bs2000_os_is_not_here()
+{
+}
+#endif /* _OSD_POSIX */
diff --git a/os/bs2000/os.h b/os/bs2000/os.h
new file mode 100644
index 0000000..3b64c6e
--- /dev/null
+++ b/os/bs2000/os.h
@@ -0,0 +1,40 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file bs2000/os.h
+ * @brief This file in included in all Apache source code. It contains definitions
+ * of facilities available on _this_ operating system (HAVE_* macros),
+ * and prototypes of OS specific functions defined in os.c or os-inline.c
+ *
+ * @defgroup APACHE_OS_BS2000 bs2000
+ * @ingroup  APACHE_OS
+ * @{
+ */
+
+#ifndef APACHE_OS_BS2000_H
+#define APACHE_OS_BS2000_H
+
+#define PLATFORM "BS2000"
+
+#include "../unix/os.h"
+
+/* Other ap_os_ routines not used by this platform */
+
+extern pid_t os_fork(const char *user);
+
+#endif /* APACHE_OS_BS2000_H */
+/** @} */