Miembro de la Comunidad de Soporte Técnico de Apple Linc Davis desarrolló este comando para ayudar en el diagnóstico de problemas. La salida da una visión general del sistema de uno y es muy similar al programa etrecheck . Pero, lo hace usando un solo comando. Deseo desglosar su funcionamiento ya que gran parte de la sintaxis utilizada no se encuentra en las páginas de MAN. De nuevo, este script es propiedad de Linc Davis. Simplemente deseo entender cómo se ejecuta. Gracias de antemano.
clear; shopt -s extglob; Fb='%s\n\t(%s)\n'; Fm='\n%s:\n\n%s\n'; Fs='\n%s: %s\n'; PB="/usr/libexec/PlistBuddy -c Print"; Pm () { [[ "$o" ]] && o=$(sed 's/^/ /' <<< "$o") && printf "$Fm" "$1" "$o"; }; Pc () { o=$(egrep -v '^[[:blank:]]*($|#)' "$2"); Pm "$1"; }; Pp () { o=$($PB "$2" | awk -F'= ' \/$3'/{print $2}'); Pm "$1"; }; Ps () { o="${o##+( )}"; [[ "$o" -ne 0 ]] && printf "$Fs" "$1" "$o"; }; a=$(id | grep -w '80(admin)'); r=1; [[ "$a" ]] && { sudo true; r=$?; }; { [[ "$a" ]] || echo $'No admin access\n'; [[ "$a" && "$r" -ne 0 ]] && echo $'No root access\n'; system_profiler SPSoftwareDataType | sed '8!d;s/^ *//'; o=$(system_profiler SPDiagnosticsDataType | sed '5,6!d'); fgrep -q P <<< "$o" && o=; Pm "POST"; o=$(nvram boot-args | awk '{$1=""; print}'); Ps "boot-args"; o=$(df -m / | awk 'NR==2 {print $4}'); [[ $o -lt 5120 ]] && Ps "Free space (MiB)"; o=$(($(vm_stat | awk '/Pageo/{sub("\\.",""); print $2}')/256)); o=$((o>=1024?o:0)); Ps "Pageouts (MiB)"; s=( $(sar -u 1 10 | sed '$!d') ); [[ ${s[4]} -lt 90 ]] && o=$(printf 'User %s%%\t\tSystem %s%%' ${s[1]} ${s[3]}) || o=; Pm "Total CPU usage" && o=$(ps acrx -o comm,ruid,%cpu | sed '2!d'); Pm "Max %CPU by process (name, UID, %)"; o=$(kextstat -kl | grep -v com\\.apple | cut -c53- | cut -d\< -f1); Pm "Loaded extrinsic kernel extensions"; o=$(launchctl list | sed 1d | awk '!/0x|com\.apple|org\.(x|openbsd)|\.[0-9]+$/{print $3}'); Pm "Loaded extrinsic user agents"; o=$(launchctl getenv DYLD_INSERT_LIBRARIES); Pm "Inserted libraries"; for f in crontab fstab launchd.conf sysctl.conf; do Pc $f /etc/$f; done; Pc "hosts" <(sed '1,10d' /etc/hosts); Pc "User crontab" <(crontab -l); Pc "User launchd" ~/.launchd; o=$(find {,/u*/lo*}/e*/periodic -type f -mtime -10d); Pm "Modified periodic scripts"; Pp "Global login items" /L*/P*/loginw* Path; Pp "User login items" L*/P*/*loginit* Name; Pp "Safari extensions" L*/Saf*/*/E*.plist Bundle | sed 's/\..*$//;s/-[1-9]$//'; o=$(find ~ $TMPDIR.. \( -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 \) | wc -l); Ps "Restricted user files"; cd; o=$(find -L /S*/L*/E* {/,}L*/{A*d,Compon,Ex,In,Keyb,Mail/Bu,P*P,Qu,Scripti,Servi,Spo}* -type d -name Contents -prune | while read d; do ID=$($PB\ :CFBundleIdentifier "$d/Info.plist") || ID="No bundle ID"; egrep -qv "^com\.apple\.[^x]|Accusys|ArcMSR|ATTO|HDPro|HighPoint|driver\.stex|hp-fax|\.hpio|JMicron|microsoft\.MDI|print|SoftRAID" <<< $ID && printf "$Fb" "${d%/Contents}" "$ID"; done); Pm "Extrinsic loadable bundles"; o=$(find /u*/{,*/}lib -type f -exec sh -c 'file -b "$1" | grep -qw shared && ! codesign -v "$1"' {} {} \; -print); Pm "Unsigned shared libraries"; o=$(system_profiler SPFontsDataType | egrep "Valid: N|Duplicate: Y" | wc -l); Ps "Font problems"; for d in {/,}L*/{La,Priv,Sta}*; do o=$(ls -A "$d" | egrep -v '\.DS_Store|^com\.apple'); Pm "$d"; done; o=$(ls /L*/L*/Dia*/*.panic | wc -l); Ps "Panics"; o=$(ls /L*/L*/Dia*/*.c* | tail); Pm "System crash logs"; o=$(ls L*/L*/Dia* | tail); Pm "User crash logs"; [[ "$r" -eq 0 ]] && { o=$(sudo profiles -P); Pm "Profiles"; o=$(sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix\.cron)|org\.(amav|apac|calendarse|cups|dove|isc|ntp|post[fg]|x)/{print $3}'); Pm "Loaded extrinsic daemons"; o=$(sudo defaults read com.apple.loginwindow LoginHook); Pm "Login hook"; Pc "Root crontab" <(sudo crontab -l);}; o=$(syslog -F bsd -k Sender kernel -k Message CReq 'GPU |hfs: Ru|I/O e|n Cause: -|NVDA\(|pagin|timed? ?o' | tail -n25 | awk '/:/{$4=""; $5=""; print}'); Pm "Kernel messages"; } 2> /dev/null | pbcopy; exit
