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To: Mark Geisert via Cygwin-apps
 <cygwin-apps AT cygwin DOT com>,
        camm AT maguirefamily DOT org
Cc: Mark Geisert <mark AT maxrnd DOT com>,
        The Cygwin Mailing List
 <cygwin AT cygwin DOT com>
Subject: Re: posix_spawn
References: <87plh7x4qp DOT fsf AT maguirefamily DOT org>
 <cd536b39-2eb3-4a9e-b5e3-f0a55bf006ee AT maxrnd DOT com>
Date: Tue, 22 Apr 2025 15:31:11 -0400
In-Reply-To: <cd536b39-2eb3-4a9e-b5e3-f0a55bf006ee@maxrnd.com> (Mark Geisert
 via Cygwin-apps's message of "Mon, 21 Apr 2025 01:21:16 -0700")
Message-ID: <87o6wogfi8.fsf@maguirefamily.org>
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From: Camm Maguire via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Camm Maguire <camm AT maguirefamily DOT org>
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Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Greetings!  posix_spawnp is returning 10, or ECHILD, on the following
call.  At least on my first reading (:-)), ECHILD is not one of the
documented errors for fork, vfork, or clone referenced by the Linux
manpage for posix_spawnp.  Suggestions?

Take care,

=============================================================================

  massert(!posix_spawn_file_actions_init(&file_actions));
  massert(!posix_spawnattr_init(&attr));

  printf("spawn 2 %s\n",*p1);
  for (pp=p1;pp<pe && *pp;pp++)
    printf("spawn 2a %s\n",*pp);
  for (pp=(void *)environ;*pp;pp++)
    printf("spawn 2e %s\n",*pp);
  
  s=posix_spawnp(&pid, *p1, &file_actions, &attr,  (void *)p1, environ);
  printf("spawn %d\n",s);fflush(stdout);

=============================================================================
spawn 2 C:\cygwin64\bin\gcc.exe
spawn 2a C:\cygwin64\bin\gcc.exe
spawn 2a -c
spawn 2a -g
spawn 2a -fsigned-char
spawn 2a -pipe
spawn 2a -fcommon
spawn 2a -fno-builtin-malloc
spawn 2a -fno-builtin-free
spawn 2a -fno-PIE
spawn 2a -fno-pie
spawn 2a -fno-PIC
spawn 2a -fno-pic
spawn 2a -std=gnu17
spawn 2a -Wall
spawn 2a -Wno-empty-body
spawn 2a -Wno-unused-but-set-variable
spawn 2a -D_FILE_OFFSET_BITS=64
spawn 2a -D_TIME_BITS=64
spawn 2a -fno-zero-initialized-in-bss
spawn 2a -mms-bitfields
spawn 2a -I/usr/include/tirpc
spawn 2a -I/cygdrive/c/Users/cammm/32/gclm/gcl/gcl/unixport/../h
spawn 2a -O2
spawn 2a -c
spawn 2a /cygdrive/c/Users/cammm/AppData/Local/Temp/gazonk_942_0.c
spawn 2a -o
spawn 2a /cygdrive/c/Users/cammm/AppData/Local/Temp/gazonk_942_0.o
spawn 2e ProgramFiles(x86)=C:\Program Files (x86)
spawn 2e CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files
spawn 2e !C:=c:\cygwin64\bin
spawn 2e SHELL=C:/Users/Camm Maguire/Downloads/emacs-25.2-x86_64/libexec/emacs/25.2/x86_64-w64-mingw32/cmdproxy.exe
spawn 2e NUMBER_OF_PROCESSORS=2
spawn 2e FPS_BROWSER_USER_PROFILE_STRING=Default
spawn 2e PROCESSOR_LEVEL=6
spawn 2e USERDOMAIN_ROAMINGPROFILE=DESKTOP-6UF6CJJ
spawn 2e HOSTNAME=DESKTOP-6UF6CJJ
spawn 2e PROGRAMFILES=C:\Program Files
spawn 2e TERMCAP=emacs:co#123:tc=unknown:
spawn 2e PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
spawn 2e INSIDE_EMACS=25.2.1,comint
spawn 2e OS=Windows_NT
spawn 2e HOMEDRIVE=C:
spawn 2e USERDOMAIN=DESKTOP-6UF6CJJ
spawn 2e PWD=/cygdrive/c/Users/cammm/32/gclm/gcl/gcl/unixport
spawn 2e USERPROFILE=C:\Users\cammm
spawn 2e PRINTER=Microsoft Print to PDF
spawn 2e TZ=America/Los_Angeles
spawn 2e ALLUSERSPROFILE=C:\ProgramData
spawn 2e ORIGINAL_PATH=/usr/bin:/cygdrive/c/Windows/system32:/cygdrive/c/Windows:/cygdrive/c/Windows/System32/Wbem:/cygdrive/c/Windows/System32/WindowsPowerShell/v1.0:/cygdrive/c/Windows/System32/OpenSSH:/cygdrive/c/Program Files/Git/cmd:/cygdrive/c/Users/cammm/AppData/Local/Microsoft/WindowsApps
spawn 2e CommonProgramW6432=C:\Program Files\Common Files
spawn 2e HOME=/cygdrive/c/Users/cammm/AppData/Roaming
spawn 2e USERNAME=cammm
spawn 2e LANG=ENU
spawn 2e OneDrive=C:\Users\cammm\OneDrive
spawn 2e COMSPEC=C:\Windows\system32\cmd.exe
spawn 2e TMPDIR=/cygdrive/c/Users/cammm/AppData/Local/Temp
spawn 2e APPDATA=C:\Users\cammm\AppData\Roaming
spawn 2e SYSTEMROOT=C:\Windows
spawn 2e LOCALAPPDATA=C:\Users\cammm\AppData\Local
spawn 2e PROMPT=$P$G
spawn 2e COMPUTERNAME=DESKTOP-6UF6CJJ
spawn 2e INFOPATH=/usr/local/info:/usr/share/info:/usr/info
spawn 2e TERM=xterm-256color
spawn 2e LOGONSERVER=\\DESKTOP-6UF6CJJ
spawn 2e USER=cammm
spawn 2e PSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules
spawn 2e TEMP=/tmp
spawn 2e DISPLAY=w32
spawn 2e SHLVL=1
spawn 2e PROCESSOR_REVISION=7e05
spawn 2e DriverData=C:\Windows\System32\Drivers\DriverData
spawn 2e COMMONPROGRAMFILES=C:\Program Files\Common Files
spawn 2e PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 126 Stepping 5, GenuineIntel
spawn 2e SESSIONNAME=Console
spawn 2e PS1=\[\e]0;\w\a\]\n\[\e[32m\]\u@\h \[\e[33m\]\w\[\e[0m\]\n\$ 
spawn 2e HOMEPATH=\Users\cammm
spawn 2e EM_PARENT_PROCESS_ID=4432
spawn 2e TMP=/tmp
spawn 2e PATH=/usr/local/bin:/usr/bin:/usr/bin:/cygdrive/c/Windows/system32:/cygdrive/c/Windows:/cygdrive/c/Windows/System32/Wbem:/cygdrive/c/Windows/System32/WindowsPowerShell/v1.0:/cygdrive/c/Windows/System32/OpenSSH:/cygdrive/c/Program Files/Git/cmd:/cygdrive/c/Users/cammm/AppData/Local/Microsoft/WindowsApps
spawn 2e ProgramW6432=C:\Program Files
spawn 2e PROFILEREAD=true
spawn 2e WINDIR=C:\Windows
spawn 2e FPS_BROWSER_APP_PROFILE_STRING=Internet Explorer
spawn 2e PROCESSOR_ARCHITECTURE=AMD64
spawn 2e PUBLIC=C:\Users\Public
spawn 2e SYSTEMDRIVE=C:
spawn 2e EXECIGNORE=*.dll
spawn 2e OLDPWD=/cygdrive/c/Users/cammm/32/gclm/gcl/gcl
spawn 2e ProgramData=C:\ProgramData
spawn 2e emacs_dir=C:/Users/Camm Maguire/Downloads/emacs-25.2-x86_64
spawn 2e _=./saved_pre_gcl
spawn 10
=============================================================================

Mark Geisert via Cygwin-apps <cygwin-apps AT cygwin DOT com> writes:

> On 4/19/2025 1:42 PM, Camm Maguire via Cygwin-apps wrote:
>> Greetings!
>> posix_spawn is returning non-zero without setting errno:
>>    massert(!posix_spawnp(&pid, *p1, &file_actions, &attr,  (void
>> *)p1, environ));
>> Is this intended to be supported?  Is it known to be working or not
>> working elsewhere?
>
> This kind of question should be sent to the main Cygwin mailing list
> cygwin AT cygwin DOT com, now CC'd.  Please follow up there if necessary.
>
> On failure, posix_spawnp() returns the error number rather than
> setting errno.  This is a convention followed by some number of the
> posix_*() functions; which ones is a question for readers of the POSIX
> standard ;-).
>
> ..mark
>
>
>

-- 
Camm Maguire			     		    camm AT maguirefamily DOT org
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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