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From: | Brian Inglis <Brian DOT Inglis AT SystematicSW DOT Invalid> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: system() return value if no program present |
Organization: | Systematic Software |
Message-ID: | <7b8rl0hfv6q3g3hq6i5uclvha49ta50hil@4ax.com> |
References: | <cielml$fln$1 AT nsnmpen3-gest DOT nuria DOT telefonica-data DOT net> <01c49d67$Blat.v2.2.2$625a64a0 AT zahav DOT net DOT il> <42da7100 DOT 0409200424 DOT 59601f01 AT posting DOT google DOT com> <01c49f48$Blat.v2.2.2$03122900 AT zahav DOT net DOT il> <42da7100 DOT 0409210019 DOT 1af1c09d AT posting DOT google DOT com> <01c4a00c$Blat.v2.2.2$f8f56520 AT zahav DOT net DOT il> <cjjc4u$2r6$1 AT nsnmpen3-gest DOT nuria DOT telefonica-data DOT net> |
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Date: | Fri, 01 Oct 2004 18:29:00 GMT |
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NNTP-Posting-Date: | Fri, 01 Oct 2004 12:29:00 MDT |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
On Fri, 01 Oct 2004 12:37:33 +0200 in comp.os.msdos.djgpp, Rafael García <rafael_no_spam_no_ AT geninfor DOT com> wrote: >Eli Zaretskii escribió: >>>>>When executed in my system I find myself in a new shell: >>>>> >>>>>Microsoft Windows XP [Versin 5.1.2600] >>>>>(C) Copyright 1985-2001 Microsoft Corp. >>>>> >>>>>c:\c> >>>> > >I have found the same problem in another computer and I have found that >this only happens when an environment variable "SHELL" is defined. If I >undefined it, no interactive shell is launched. > >set SHELL= > - system("grep")=2 and works as expected > - system("notexist")=0 and works as expected ("not found") > - system("dir")=0 and works as expected > >set SHELL=cmd > - system("grep")=2 and works as expected > - system("notexist")=-1 and works as expected ("not found") > - system("dir")=-1 and it does nothing (¿why?) > >set SHELL=c:\wtsrv\system32\cmd.exe (correct path) > - system("grep")=2 and works as expected > - system("notexist") runs interactive shell and then returns 0 (¿why?) > (this was what begun my question) > - system("dir") runs interactive shell and then returns 0 (¿why?) SHELL is expected to name a Unix like shell, COMSPEC is expected to name a DOS like shell, so your first setting is correct. -- Thanks. Take care, Brian Inglis Calgary, Alberta, Canada Brian DOT Inglis AT CSi DOT com (Brian[dot]Inglis{at}SystematicSW[dot]ab[dot]ca) fake address use address above to reply
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