contrib/tcsh_completion
author Augie Fackler <augie@google.com>
Mon, 08 Jul 2019 13:12:20 -0400
branchstable
changeset 42562 97ada9b8d51b
parent 13515 2616325766e3
permissions -rw-r--r--
posix: always seek to EOF when opening a file in append mode Python 3 already does this, so skip it there. Consider the program: #include <stdio.h> int main() { FILE *f = fopen("narf", "w"); fprintf(f, "narf\n"); fclose(f); f = fopen("narf", "a"); printf("%ld\n", ftell(f)); fprintf(f, "troz\n"); printf("%ld\n", ftell(f)); return 0; } on macOS, FreeBSD, and Linux with glibc, this program prints 5 10 but on musl libc (Alpine Linux and probably others) this prints 0 10 By my reading of https://pubs.opengroup.org/onlinepubs/009695399/functions/fopen.html this is technically correct, specifically: > Opening a file with append mode (a as the first character in the > mode argument) shall cause all subsequent writes to the file to be > forced to the then current end-of-file, regardless of intervening > calls to fseek(). in other words, the file position doesn't really matter in append-mode files, and we can't depend on it being at all meaningful unless we perform a seek() before tell() after open(..., 'a'). Experimentally after a .write() we can do a .tell() and it'll always be reasonable, but I'm unclear from reading the specification if that's a smart thing to rely on. This matches what we do on Windows and what Python 3 does for free, so let's just be consistent. Thanks to Yuya for the idea.
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#
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# tcsh completion for Mercurial
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#
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# This file has been auto-generated by tcsh_completion_build.sh for
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# Mercurial Distributed SCM (version 1.7.5+157-8a220ae0b2ba)
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#
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# Copyright (C) 2005 TK Soh.
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#
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# This is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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#
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complete hg \
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  'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \
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  'C/-/( -R --repository \
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    --cwd \
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    -y --noninteractive \
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    -q --quiet \
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    -v --verbose \
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    --config \
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    --debug \
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    --debugger \
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    --encoding \
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    --encodingmode \
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    --traceback \
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    --time \
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    --profile \
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    --version \
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    -h --help)/' \
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  'p/1/(add addremove annotate blame archive \
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    backout bisect bookmarks branch branches \
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    bundle cat clone commit ci \
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    copy cp debugancestor debugbuilddag debugcheckstate \
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    debugcommands debugcomplete debugdag debugdata debugdate \
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    debugfsinfo debugignore debugindex debugindexdot debuginstall \
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    debugpushkey debugrebuildstate debugrename debugrevspec debugsetparents \
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    debugstate debugsub debugwalk diff export \
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    forget grep heads help identify \
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    id import patch incoming in \
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    init locate log history manifest \
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    merge outgoing out parents paths \
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    pull push recover remove rm \
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    rename move mv resolve revert \
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    rollback root serve showconfig debugconfig \
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    status st summary sum tag \
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    tags tip unbundle update up \
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    checkout co verify version)/'
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