[Discuss] Seeking information on binaries called "entities" and "fixup"

[bill at horne.net (Bill Horne)]

On 7/29/2014 6:06 PM, Tom Metro wrote:
> Bill Horne wrote:
>> moder8 at telecom:~/bin$ ls -lh /home/moder8/bin/entities
>> -rwxrwxr-x 1 moder8 telecom 8.8K Jan 27  2012 /home/moder8/bin/entities
>>
>> moder8 at telecom:~$ strace /home/moder8/bin/entities /var/www/html/archives/back.issues/recent.single.issues/I125
>> execve("/home/moder8/bin/entities", ["/home/moder8/bin/entities", "/var/www/html/archives/back.issu"...], [/* 21 vars */]) = -1 ENOENT (No such file or directory)
>> write(2, "strace: exec: No such file or di"..., 40strace: exec: No such file or directory
>> ) = 40
> Have you examined /home/moder8/bin/entities with 'file', strings, and less?
>
> I would guess that it is a shell script with a missing interpreter, but
> the error message is not right for that.
>
> Actually, that might be it:
>
> % touch foo
> % chmod u+x foo
> % echo #\!/bin/bogus>  foo
> fringe:/tmp% strace ./foo
> execve("./foo", ["./foo"], [/* 54 vars */]) = -1 ENOENT (No such file or
> directory)
> [...]
> write(3, "strace: exec: No such file or di"..., 40strace: exec: No such
> file or directory
> ) = 40
>
> It's a misleading error message. The "No such file" is not referring to
> ./foo, but to the specified interpreter, /bin/bogus, but because the
> bang-path magic is embedded in execve(), and it only returns an error
> code (it doesn't generate the error message to STDERR), you're left with
> a generic error and no object being identified.
>
>
> I assume the above was on the new server. What happens when you strace
> it on the old server?
>
>   -Tom
>

Tom,

I ran the "entities" binary on the "old" machine, and I've pasted the 
output here: "I125" is a standard MBOX-format email file, with a single 
issue of The Telecom Digest in it. It works as expected.

moder8 at old-massis:/tmp$ strace -o/tmp/strace_out2.txt 
/home/moder8/bin/entities <I125

execve("/home/moder8/bin/entities", ["/home/moder8/bin/entities"], [/* 
20 vars */]) = 0
brk(0)                                  = 0x8749000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or 
directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0xb77df000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or 
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=23117, ...}) = 0
mmap2(NULL, 23117, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb77d9000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or 
directory)
open("/lib/i686/cmov/libc.so.6", O_RDONLY) = 3
read(3, 
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\0n\1\0004\0\0\0"..., 
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1327556, ...}) = 0
mmap2(NULL, 1337704, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0xb7692000
mprotect(0xb77d2000, 4096, PROT_NONE)   = 0
mmap2(0xb77d3000, 12288, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x140) = 0xb77d3000
mmap2(0xb77d6000, 10600, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb77d6000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0xb7691000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb76916c0, 
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, 
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xb77d3000, 8192, PROT_READ)   = 0
mprotect(0xb77fd000, 4096, PROT_READ)   = 0
munmap(0xb77d9000, 23117)               = 0
fstat64(0, {st_mode=S_IFREG|0666, st_size=3174, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0xb77de000
read(0, "From telecom-owner+DV033N00125=b"..., 4096) = 3174
fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0xb77dd000
write(1, "From telecom-owner+DV033N00125=b"..., 108) = 108
write(1, "Return-path: &lt;telecom-owner+D"..., 99) = 99
write(1, "Envelope-to: backups-digest at tele"..., 46) = 46
write(1, "Delivery-date: Sun, 27 Jul 2014 "..., 47) = 47
write(1, "Received: from listmail.iecc.com"..., 50) = 50
write(1, "\tby telecom.xen.prgmr.com with e"..., 49) = 49
write(1, "\t(envelope-from &lt;telecom-owne"..., 103) = 103
write(1, "\tid 1XBIko-0000XY-Dp\n", 21) = 21
write(1, "\tfor backups-digest at telecomdiges"..., 71) = 71
write(1, "Received: (qmail 62112 invoked b"..., 72) = 72
write(1, "DKIM-Signature: v=1; a=rsa-sha25"..., 599) = 599
write(1, "Content-Type: text/plain\n", 25) = 25
write(1, "Content-Disposition: inline\n", 28) = 28
write(1, "Content-Transfer-Encoding: 8bit\n", 32) = 32
write(1, "MIME-Version: 1.0\n", 18)     = 18
write(1, "X-Mailer: MIME-tools 5.505 (Enti"..., 42) = 42
write(1, "Subject: The Telecom Digest (1 m"..., 41) = 41
write(1, "From: telecom-owner at telecom-dige"..., 39) = 39
write(1, "To: telecom at telecom-digest.org\n", 31) = 31
write(1, "Date: Sun, 27 Jul 2014 03:20:03 "..., 38) = 38
write(1, "Reply-To: telecomdigestsubmissio"..., 54) = 54
write(1, "List-Help: &lt;mailto:telecom-re";..., 94) = 94
write(1, " Instructions)\n", 15)        = 15
write(1, "List-Unsubscribe: (Use this comm"..., 57) = 57
write(1, "+&lt;mailto: telecom-request at tel"..., 79) = 79
write(1, "List-Subscribe: (Use this comman"..., 52) = 52
write(1, "+&lt;mailto: telecom-request at tel"..., 77) = 77
write(1, "List-Post: &lt;mailto:telecomdig";..., 70) = 70
write(1, "List-Owner: &lt;mailto:owner-tel";..., 80) = 80
write(1, " Help)\n", 7)                 = 7
write(1, "List-ID: &lt;telecom.telecom-dig"..., 44) = 44
write(1, "X-Loop: majordomo\n", 18)     = 18
write(1, "Precedence: bulk\n", 17)      = 17
write(1, "Sender: telecom-owner at telecom-di"..., 41) = 41
write(1, "Errors-To: telecom-owner at telecom"..., 44) = 44
write(1, "Reply-To: telecomdigestmoderator"..., 52) = 52
write(1, "Status: RO\n", 11)            = 11
write(1, "Content-Length: 823\n", 20)   = 20
write(1, "Lines: 32\n", 10)             = 10
write(1, "\n", 1)                       = 1
write(1, "The Telecom Digest \n", 20)   = 20
write(1, "Volume 33 : Issue 125 : &quot;te"..., 48) = 48
write(1, "\n", 1)                       = 1
write(1, "Messages in this Issue:\n", 24) = 24
write(1, "  Bill Horne has returned [nfp] "..., 77) = 77
write(1, "\n", 1)                       = 1
write(1, "--------------------------------"..., 71) = 71
write(1, "\n", 1)                       = 1
write(1, "Date: Fri, 25 Jul 2014 14:29:16 "..., 38) = 38
write(1, "From: Telecom Digest Moderator &"..., 93) = 93
write(1, "To: telecomdigestmoderator at telec"..., 47) = 47
write(1, "Subject: Bill Horne has returned"..., 39) = 39
write(1, "Message-ID: &lt;20140725182916.G"..., 69) = 69
write(1, "\n", 1)                       = 1
write(1, "\n", 1)                       = 1
write(1, "I&#39;ve decided to resume my du"..., 51) = 51
write(1, "\n", 1)                       = 1
write(1, "Fred Goldstein has done a great "..., 74) = 74
write(1, "me in thanking him for his selfl"..., 63) = 63
write(1, "difficult time.\n", 16)       = 16
write(1, "\n", 1)                       = 1
write(1, "Bill\n", 5)                   = 5
write(1, "\n", 1)                       = 1
write(1, "-- \n", 4)                    = 4
write(1, "Bill Horne \n", 12)           = 12
write(1, "Moderator\n", 10)             = 10
write(1, "\n", 1)                       = 1
write(1, "\n", 1)                       = 1
write(1, "------------------------------\n", 31) = 31
write(1, "\n", 1)                       = 1
write(1, "End of The Telecom Digest (1 mes"..., 39) = 39
write(1, "**********\n", 11)            = 11
write(1, "\n", 1)                       = 1
read(0, "", 4096)                       = 0
exit_group(0)                           = ?

-- 
E. William Horne
William Warren Consulting
339-364-8487