View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000504 | file | General | public | 2024-02-20 09:09 | 2024-03-01 03:33 |
| Reporter | skissane | Assigned To | christos | ||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Product Version | 5.45 | ||||
| Fixed in Version | HEAD | ||||
| Summary | 0000504: Recognise z/OS Program Objects | ||||
| Description | Currently, magic/Magdir/ibm370 recognises various old IBM mainframe executable format, but does not recognise the current z/OS executable format defined by IBM ("z/OS Program Object"), which is the IBM mainframe executable format you are most likely to encounter in the wild today. I am supplying a patch to recognise this format. (It is quite simple, it is just "IEWPLMH " as magic at start of the file, except that is in EBCDIC instead of ASCII.) | ||||
| Steps To Reproduce | 1. Download https://github.com/ZOSOpenTools/bashport/releases/download/STABLE_bashport_2038/bash-5.2.21.20240126_140514.zos.pax.Z (port of bash to IBM z/OS) 2. Extract the file bin/bash from that archive (it is a compressed tar archive, so tar xzf can extract it) 3. file ./bash EXPECTED: something like "z/OS Program Object executable" ACTUAL: reports "data" 4. Apply attached patch to magic/Magdir/ibm370 5. file -m ibm370.new ./bash ACTUAL: reports "z/OS Program Object executable" | ||||
| Additional Information | I attach a patch to magic/Magdir/ibm370. I also attach (gzipped) the bash executable I mention above so you don't have to download and extract it. Also, there was a comment line saying "What the heck *is* "USS/370"?" The answer is, "USS/370" is a very old (early 1990s) name for the IBM's Unix compatibility subsystem for z/OS (formerly known as MVS or OS/390). So I replaced that question with its answer. I haven't changed the name in the magic rules, since for those very old executable formats (which IBM doesn't use any more) it is arguably the correct name. | ||||
| Tags | magic | ||||
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ibm370.patch (937 bytes)
diff --git a/magic/Magdir/ibm370 b/magic/Magdir/ibm370 index dc976f87..c3153b84 100644 --- a/magic/Magdir/ibm370 +++ b/magic/Magdir/ibm370 @@ -4,7 +4,7 @@ # ibm370: file(1) magic for IBM 370 and compatibles. # # "ibm370" said that 0x15d == 0535 was "ibm 370 pure executable". -# What the heck *is* "USS/370"? +# "USS/370" is an old name for the z/OS Unix subsystem # AIX 4.1's "/etc/magic" has # # 0 short 0535 370 sysV executable @@ -50,3 +50,9 @@ # NETDATA (https://en.wikipedia.org/wiki/NETDATA) # -\INMR01 In EBCDIC 0 string \x60\xe0\xc9\xd5\xd4\xd9\xf0\xf1 IBM NETDATA file + +# z/OS Program Object executable +# Starts with "IEWPLMH" in EBCDIC, followed by a single EBCDIC space to pad +# to 8 bytes. According to https://www.ibm.com/support/pages/apar/PK91585 +# IEWPLMH is eyecatcher for "Binder Program Load Module Header" control block +0 string \xc9\xc5\xe6\xd7\xd3\xd4\xc8\x40 z/OS Program Object executable |
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Added, thanks! |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2024-02-20 09:09 | skissane | New Issue | |
| 2024-02-20 09:09 | skissane | File Added: ibm370.patch | |
| 2024-02-20 09:09 | skissane | File Added: bash.zos.gz | |
| 2024-02-20 18:26 | skissane | Tag Attached: magic | |
| 2024-03-01 03:32 | christos | Assigned To | => christos |
| 2024-03-01 03:32 | christos | Status | new => assigned |
| 2024-03-01 03:33 | christos | Status | assigned => resolved |
| 2024-03-01 03:33 | christos | Resolution | open => fixed |
| 2024-03-01 03:33 | christos | Fixed in Version | => HEAD |
| 2024-03-01 03:33 | christos | Note Added: 0004016 |
