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Disable file command system call sandboxing

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Because the "Bad system call" maybe happened on some machines.

```
[root@xxx tmp]# file a.txt
a.txt: empty
Bad system call
[root@xxx tmp]# echo $?
159
[root@xxx tmp]# file -S a.txt
a.txt: empty
[root@xxx tmp]# echo $?
0
```
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vkill 2021-03-25 09:46:34 +08:00 committed by GitHub
parent b69cb86bba
commit d0717c730d
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@ -126,7 +126,7 @@ elif [[ "${@: -1}" == "debtap" ]] || [[ "${@: -1}" =~ /debtap$ ]] || [[ "${@: -1
echo -e "${red}Error: You haven't specified a deb package${NC}\nSyntax: debtap [options] package_filename\n\nOptions:\n\n -h --help Print this help message\n -u --update Update debtap database\n -q --quiet Bypass all questions, except for editing metadata file(s)\n -Q --Quiet Bypass all questions (not recommended)\n -s --pseudo Create a pseudo-64-bit package from a 32-bit .deb package\n -w --wipeout Wipeout versions from all dependencies, conflicts etc.\n -p --pkgbuild Additionally generate a PKGBUILD file\n -P --Pkgbuild Generate a PKGBUILD file only\n -v --version Print version"; exit 1
elif [[ "${@: -1}" =~ ^(-)+(.)*$ ]] || [[ $(ls "${@: -1}" &> /dev/null; echo $?) != 0 ]]; then
echo -e "${red}Error: No such file or directory or invalid option${NC}"; exit 1
elif [[ $(file -b "${@: -1}" | grep -q "Debian binary package"; echo $?) != 0 ]]; then
elif [[ $(file -S -b "${@: -1}" | grep -q "Debian binary package"; echo $?) != 0 ]]; then
echo -e "${red}Error: You haven't specified a valid deb package${NC}"; exit 1
fi