mirror of
https://github.com/notwa/rc
synced 2024-11-05 07:29:04 -08:00
116 lines
3.9 KiB
Bash
Executable file
116 lines
3.9 KiB
Bash
Executable file
#!/usr/bin/env sh
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# YES_ZSH YES_BASH YES_DASH YES_ASH
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__maybesudo() { ### @maybesudo
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### mimic certain features of `sudo` for systems without it installed.
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### as it stands, this mostly just handles some environment variables.
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###
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### try this: `maybesudo_ -u "$USER" printenv`
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name=
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env_cleanup=0
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while getopts :AEHKPSVbhiklnsvC:U:g:p:r:t:u: name; do
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case "$name" in
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K|V|k)
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# K: sure kill
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# V: version
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# k: kill
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note 'maybesudo: your system does not have sudo installed!'
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return 0
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;;
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h)
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printf "%s\n" 'maybesudo - a dumb utility for systems without sudo'
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printf "\n"
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printf "%s\n" 'usage: maybesudo -h | -V'
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printf "%s\n" 'usage: maybesudo [command]'
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return 0
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;;
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A|E|H|P|S|n|p)
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# A: askpass
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# E: preserve environment
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# H: HOME
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# P: preserve group vector
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# S: stdin (password)
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# n: non-interactive
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# p: prompt
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note 'maybesudo: option has no effect --' "'$name'"
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;;
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C|U|b|g|i|l|r|s|t)
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# C: close from (fd)
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# U: other user (in conjunction with -l)
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# b: background
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# g: group
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# i: simulate initial login (TODO)
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# l: list
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# r: role (SELinux)
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# s: shell (TODO)
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# t: type (SELinux)
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note "maybesudo: unsupported option --" "'$name'"
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return 1
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;;
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u) # user
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if [ -z "$USER" ] || [ "$OPTARG" != "$USER" ]; then
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note 'maybesudo: users other than yourself are unsupported!'
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return 1
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fi
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env_cleanup=1
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;;
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:)
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note 'maybesudo: option requires an argument --' "'$OPTARG'"
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return 1
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;;
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default)
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note 'maybesudo: invalid option --' "'$OPTARG'"
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return 1
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;;
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esac
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done
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shift "$((OPTIND-1))"
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if [ "$env_cleanup" = 1 ]; then
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# portably listing exported variable names is virtually impossible
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# without the blessing of null-terminated strings, so don't even try.
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# just export the bare minimum that a fairly stock sudo would.
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# TODO: you know, awk has an ENVIRON array that might be easier to work with.
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# don't eat up precious command space with dumb colors.
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# xargs --show-limits says:
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# Maximum length of command we could actually use: 5080
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[ "${#LS_COLORS}" -le 1024 ] || LS_COLORS=
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# doas seems to override PATH with /bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
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# sudo also sets SUDO_COMMAND, SUDO_GID, SUDO_UID, SUDO_USER, and MAIL,
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# but who needs those?
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# "${USER:+DOAS_USER=}${USER}"
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# "${USER:+SUDO_USER=}${USER}"
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# "${LOGNAME:+LOGNAME=}${USER:--i}"
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[ -z "$XAUTHORIZATION" ] || set -- XAUTHORIZATION="$XAUTHORIZATION" "$@"
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[ -z "$XAUTHORITY" ] || set -- XAUTHORITY="$XAUTHORITY" "$@"
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[ -z "$USERNAME" ] || set -- USERNAME="$USERNAME" "$@"
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[ -z "$USER" ] || set -- USER="$USER" "$@"
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[ -z "$TERM" ] || set -- TERM="$TERM" "$@"
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[ -z "$SHELL" ] || set -- SHELL="$SHELL" "$@"
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[ -z "$PATH" ] || set -- PATH="$PATH" "$@"
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[ -z "$LS_COLORS" ] || set -- LS_COLORS="$LS_COLORS" "$@"
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[ -z "$KRB5CCNAME" ] || set -- KRB5CCNAME="$KRB5CCNAME" "$@"
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[ -z "$HOSTNAME" ] || set -- HOSTNAME="$HOSTNAME" "$@"
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[ -z "$HOME" ] || set -- HOME="$HOME" "$@"
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[ -z "$DPKG_COLORS" ] || set -- DPKG_COLORS="$DPKG_COLORS" "$@"
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[ -z "$DISPLAY" ] || set -- DISPLAY="$DISPLAY" "$@"
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[ -z "$COLORS" ] || set -- COLORS="$COLORS" "$@"
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set -- -i "$@"
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fi
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env "$@"
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}
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maybesudo_()(__maybesudo "$@")
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[ -n "${preload+-}" ] || __maybesudo "$@"
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