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v6.2
tests/options-syntax.test
419 строк
22 KB
Eugene Syromyatnikov
Raise strace awareness
02 апр 2022, 22:38
02 апр 2022, 22:38
5a0e2de
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О чём код?
#!/bin/sh # # Check strace options syntax. # # Copyright (c) 2016 Dmitry V. Levin <ldv@strace.io> # Copyright (c) 2016-2022 The strace developers. # All rights reserved. # # SPDX-License-Identifier: GPL-2.0-or-later . "${srcdir=.}/syntax.sh" compiled_with_secontext=$(get_config_option ENABLE_SECONTEXT "y") compiled_with_stacktrace="$(get_config_option ENABLE_STACKTRACE 1)" check_e "Invalid process id: '0'" -p 0 check_e "Invalid process id: '0'" --attach=0 check_e "Invalid process id: '-42'" -p -42 check_e "Invalid process id: '-42'" --attach=-42 check_e "Invalid process id: '$$.'" -p $$. check_e "Invalid process id: '$$.'" --attach=$$. check_e "Invalid process id: 'a'" -p 1,a check_e "Invalid process id: 'a'" --attach=1,a check_e "Syscall 'chdir' for -b isn't supported" -b chdir check_e "Syscall 'chdir' for -b isn't supported" --detach-on=chdir check_e "Syscall 'chdir' for -b isn't supported" -b execve -b chdir check_e "Syscall 'chdir' for -b isn't supported" --detach-on=execve --detach-on=chdir check_e_using_grep 'exec: File *name too long' "$(printf '%4096s' ' ')" ff_name="$(printf '%4084s' ' ')" check_e_using_grep "$ff_name: File *name too long" -ff -o "$ff_name" true check_e_using_grep "$ff_name: File *name too long" -ff --output="$ff_name" true check_h 'must have PROG [ARGS] or -p PID' check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps= check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps=, check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps=,s check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps=s, check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps=,, check_h "must have PROG [ARGS] or -p PID" --absolute-timestamps=s,,none check_h "must have PROG [ARGS] or -p PID" --timestamps --absolute-timestamps=ns --timestamps=none --absolute-timestamps=format:time,precision:s --timestamps=ns,format:unix --absolute-timestamps=us,precision:ms,unix,precision:ns --timestamps=format:none,time,precision:us check_h "invalid --absolute-timestamps argument: 'ss'" --absolute-timestamps=ss check_h "invalid --timestamps argument: 'format:s'" --timestamps=format:s check_h "invalid --timestamps argument: 's,non'" --timestamps=s,non check_h "invalid --timestamps argument: 'precision:none'" --timestamps=precision:none check_e '-t and --absolute-timestamps cannot be provided simultaneously' -t --timestamps -p $$ check_e '-t and --absolute-timestamps cannot be provided simultaneously' --absolute-timestamps -ttt -p $$ check_e '-t and --absolute-timestamps cannot be provided simultaneously' -t --timestamps=ns -t -p $$ check_e '-t and --absolute-timestamps cannot be provided simultaneously' --timestamps=ns -t --absolute-timestamps=unix -p $$ if [ -n "$compiled_with_secontext" ]; then for opt in '--secontext' '-e secontext'; do check_e "invalid secontext ''" $opt= check_e "invalid secontext 'ss'" $opt=ss check_e "invalid secontext 'ss'" $opt=ss,full,mismatch check_e "invalid secontext 'ss'" $opt=full,ss,mismatch check_e "invalid secontext 'ss'" $opt=full,ss check_e "invalid secontext 'ss'" $opt=full,mismatch,ss check_e "invalid secontext 'ss'" $opt=!full,ss check_e "invalid secontext 'ss'" $opt=!full,mismatch,ss done else for opt in '--secontext' '--secontext=full' '-e secontext=mismatch'; do check_e "SELinux context printing (--secontext option) is not supported by this build of strace" $opt done fi for opt in 'id' \ 'id:' \ '-1' \ '2147483648' \ 'id:rand' \ 'id:randomm' \ '2,3,radomm,4' \ 'format' \ 'format:' \ 'id:format' \ 'id:format:full' \ 'format:id:0' do check_h "invalid --tips argument: '$opt'" --tips="$opt" done for opt in '--tips' \ '--tips=' \ '--tips=0' \ '--tips=id:0 --tips' \ '--tips=1,id:42' \ '--tips=1 --tips=id:42' \ '--tips=random' \ '--tips --tips=random' \ '--tips=id:random,23' \ '--tips=id:random,23 --tips=random,2,3,id:4,5' \ '--tips=format:none' \ '--tips=format:compact --tips' \ '--tips --tips=format:full,3,none,id:42,compact' do check_h "must have PROG [ARGS] or -p PID" $opt done check_h 'PROG [ARGS] must be specified with -D/--daemonize' -D -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' -DD -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' -DDD -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' -DDDD -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' --daemonize -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' --daemonize=grandchild -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' --daemonize=pgroup -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' --daemonize=Pgrp -p $$ check_h 'PROG [ARGS] must be specified with -D/--daemonize' --daemonize=SESSION -p $$ check_h 'Too many -D'\''s (4), maximum supported -D count is 3' -DDDD /bin/true check_e '-D and --daemonize cannot be provided simultaneously' -D --daemonize -p $$ check_e '-D and --daemonize cannot be provided simultaneously' --daemonize -D -p $$ check_e '-D and --daemonize cannot be provided simultaneously' --daemonize -v -D /bit/true check_h "invalid --daemonize argument: 'pgr'" --daemonize=pgr check_h '-c/--summary-only and -C/--summary are mutually exclusive' -c -C true check_h '-c/--summary-only and -C/--summary are mutually exclusive' --summary-only --summary true check_h '-c/--summary-only and -C/--summary are mutually exclusive' -C -c true check_h '-c/--summary-only and -C/--summary are mutually exclusive' --summary --summary-only true check_h '(-c/--summary-only or -C/--summary) and -ff/--output-separately are mutually exclusive' -c -ff true check_h '(-c/--summary-only or -C/--summary) and -ff/--output-separately are mutually exclusive' --summary-only -ff true check_h '(-c/--summary-only or -C/--summary) and -ff/--output-separately are mutually exclusive' -C -ff true check_h '(-c/--summary-only or -C/--summary) and -ff/--output-separately are mutually exclusive' --summary -ff true check_h '-w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' -w true check_h '-w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' --summary-wall-clock true check_h '-U/--summary-columns must be given with (-c/--summary-only or -C/--summary)' -U name,time,count,errors true check_h '-U/--summary-columns must be given with (-c/--summary-only or -C/--summary)' --summary-columns=name,time,count,errors true check_h 'piping the output and -ff/--output-separately are mutually exclusive' -o '|' -ff true check_h 'piping the output and -ff/--output-separately are mutually exclusive' --output='|' -ff true check_h 'piping the output and -ff/--output-separately are mutually exclusive' -o '!' -ff true check_h 'piping the output and -ff/--output-separately are mutually exclusive' --output='!' -ff true check_h "invalid -a argument: '-42'" -a -42 check_h "invalid -O argument: '-42'" -O -42 check_h "invalid -s argument: '-42'" -s -42 check_h "invalid --string-limit argument: '-42'" --string-limit=-42 check_h "invalid -s argument: '1073741824'" -s 1073741824 check_h "invalid --string-limit argument: '1073741824'" --string-limit=1073741824 check_h "must have PROG [ARGS] or -p PID" --follow-forks check_h "must have PROG [ARGS] or -p PID" --follow-forks --output-separately check_h "must have PROG [ARGS] or -p PID" -f --output-separately check_h "must have PROG [ARGS] or -p PID" --output-separately check_e '-f and --follow-forks cannot be provided simultaneously' -f --follow-forks -p $$ check_e '-ff and --output-separately cannot be provided simultaneously' --output-separately -ff -p $$ check_h "invalid -I argument: '0x1'" -I 0x1 check_h "invalid -I argument: '0'" -I 0 check_h "must have PROG [ARGS] or -p PID" -I1 check_h "must have PROG [ARGS] or -p PID" -I 2 check_h "must have PROG [ARGS] or -p PID" -I3 check_h "must have PROG [ARGS] or -p PID" -I 4 check_h "invalid -I argument: '5'" -I 5 check_h "must have PROG [ARGS] or -p PID" -I always check_h "must have PROG [ARGS] or -p PID" -I anywhere check_h "must have PROG [ARGS] or -p PID" -Iwaiting check_h "must have PROG [ARGS] or -p PID" -I never check_h "must have PROG [ARGS] or -p PID" -Inever_tstp check_h "invalid -I argument: '=never'" -I=never check_h "invalid -I argument: 'nevertheless'" -Inevertheless check_h "invalid -I argument: 'nev'" -Inev check_h "invalid --interruptible argument: '0x1'" --interruptible=0x1 check_h "invalid --interruptible argument: '0'" --interruptible=0 check_h "must have PROG [ARGS] or -p PID" --interruptible 1 check_h "must have PROG [ARGS] or -p PID" --interruptible=2 check_h "invalid --interruptible argument: '5'" --interruptible=5 check_h "must have PROG [ARGS] or -p PID" --interruptible=anywhere check_h "must have PROG [ARGS] or -p PID" --interruptible=waiting check_h "must have PROG [ARGS] or -p PID" --interruptible=never check_h "must have PROG [ARGS] or -p PID" --interruptible=never_tstp check_h "invalid --interruptible argument: 'nevertheless'" --interruptible=nevertheless check_h "invalid --interruptible argument: 'nev'" --interruptible=nev check_h "must have PROG [ARGS] or -p PID" --relative-timestamps check_h "must have PROG [ARGS] or -p PID" --relative-timestamps=s check_h "must have PROG [ARGS] or -p PID" --relative-timestamps=ms check_h "must have PROG [ARGS] or -p PID" --relative-timestamps=us check_h "must have PROG [ARGS] or -p PID" --relative-timestamps=ns check_h "invalid --relative-timestamps argument: 'n'" --relative-timestamps=n check_h "invalid --relative-timestamps argument: 'ss'" --relative-timestamps=ss check_h "must have PROG [ARGS] or -p PID" --syscall-times check_h "must have PROG [ARGS] or -p PID" --syscall-times=s check_h "must have PROG [ARGS] or -p PID" --syscall-times=ms check_h "must have PROG [ARGS] or -p PID" --syscall-times=us check_h "must have PROG [ARGS] or -p PID" --syscall-times=ns check_h "invalid --syscall-times argument: 'n'" --syscall-times=n check_h "invalid --syscall-times argument: 'ss'" --syscall-times=ss check_h "must have PROG [ARGS] or -p PID" --strings-in-hex check_h "must have PROG [ARGS] or -p PID" --strings-in-hex=all check_h "must have PROG [ARGS] or -p PID" --strings-in-hex=non-ascii check_h "invalid --strings-in-hex argument: 'al'" --strings-in-hex=al check_h "invalid --strings-in-hex argument: 'alll'" --strings-in-hex=alll check_h "invalid --strings-in-hex argument: 'ascii'" --strings-in-hex=ascii check_h "must have PROG [ARGS] or -p PID" --quiet=all check_h "must have PROG [ARGS] or -p PID" --quiet=none check_h "must have PROG [ARGS] or -p PID" --quiet=\!attach check_h "must have PROG [ARGS] or -p PID" --quiet=exit,exits,personality check_e "invalid quiet 'detach'" --quiet=detach -p $$ check_e "invalid quiet 'fds'" -q --quiet=fds -p $$ check_e "invalid quiet 'detach'" --quiet=detach -p $$ check_e '-q and -e quiet/--quiet cannot be provided simultaneously' -q --quiet -p $$ check_e '-q and -e quiet/--quiet cannot be provided simultaneously' -q -e q=none -p $$ check_e '-q and -e quiet/--quiet cannot be provided simultaneously' -q -e silent=attach,personality -p $$ check_h 'must have PROG [ARGS] or -p PID' -P . check_h 'must have PROG [ARGS] or -p PID' -P . -P.. check_h 'must have PROG [ARGS] or -p PID' --trace-path=. check_h 'must have PROG [ARGS] or -p PID' --trace-path=. --trace-path .. check_e "Requested path \"///\" resolved into \"/\" $STRACE_EXE: Requested path \"/.\" resolved into \"/\" $STRACE_EXE: -q and -e quiet/--quiet cannot be provided simultaneously" -q --quiet -P /// -P/. . for i in time time_percent time-percent time_total time-total total_time total-time min_time min-time time_min time-min shortest max_time max-time time_max time-max longest avg_time avg-time time_avg time-avg calls count error errors name syscall syscall_name syscall-name none nothing; do check_h "must have PROG [ARGS] or -p PID" -S "$i" check_h "must have PROG [ARGS] or -p PID" --summary-sort-by="$i" if [ "x$i" != xnone -a "x$i" != xnothing ]; then check_h "must have PROG [ARGS] or -p PID" -c -U "$i" check_h "must have PROG [ARGS] or -p PID" --summary-only --summary-columns="$i" fi done for i in time,time_total,avg_time,calls,errors,name time_percent,total_time,time_avg,count,error,syscall_name; do check_h "must have PROG [ARGS] or -p PID" -c -U "$i" check_h "must have PROG [ARGS] or -p PID" --summary-only --summary-columns="$i" done for i in non syscall_names; do check_h "invalid sortby: '$i'" -S "$i" check_h "invalid sortby: '$i'" --summary-sort-by="$i" check_h "unknown column name: '$i'" -U "$i" check_h "unknown column name: '$i'" --summary-columns="$i" done check_h "unknown column name: ''" -U time,,name check_h "call summary column has been provided more than once: 'time_percent' (-U option residual: 'time_percent,time_total')" -U time,time_percent,time_total check_e '-x and --strings-in-hex cannot be provided simultaneously' -x --strings-in-hex -p $$ check_e '-x and --strings-in-hex cannot be provided simultaneously' --strings-in-hex -p $$ -xx check_h "invalid -X argument: 'test'" -Xtest check_h "invalid --const-print-style argument: 'test'" --const-print-style=test check_h "invalid -X argument: 'a'" -Xa check_h "invalid --const-print-style argument: 'a'" --const-print-style=a check_h "invalid -X argument: 'abbreviated'" -X abbreviated check_h "invalid --const-print-style argument: 'abbreviated'" --const-print-style=abbreviated check_h "must have PROG [ARGS] or -p PID" --decode-fds check_h "must have PROG [ARGS] or -p PID" --decode-fds=all check_h "must have PROG [ARGS] or -p PID" --decode-fds=none check_h "must have PROG [ARGS] or -p PID" --decode-fds=path check_h "must have PROG [ARGS] or -p PID" --decode-fds=socket,dev check_h "must have PROG [ARGS] or -p PID" --decode-fds=\!path check_h "must have PROG [ARGS] or -p PID" --decode-fds=socket,path,dev check_e "invalid decode-fds 'p'" --decode-fds=p -p $$ check_e "invalid decode-fds 'device'" -y --decode-fds=device -p $$ check_e "invalid decode-fds 'name'" --decode-fds=path,name -p $$ check_e "invalid decode-fds 'sock'" -e decode-fd=sock -y -p $$ check_e '-y and --decode-fds cannot be provided simultaneously' -y --decode-fds -p $$ check_e '-y and --decode-fds cannot be provided simultaneously' -e decode-fd=all -yy -p $$ check_e '-y and --decode-fds cannot be provided simultaneously' --decode-fds=none -y -p $$ check_h "incorrect personality designator '' in qualification 'getcwd@'" -e trace=getcwd@ check_h "incorrect personality designator '42' in qualification 'getcwd@42'" -e trace=getcwd@42 check_h "incorrect personality designator '42' in qualification 'getcwd@42'" -e trace=gettid,getcwd@42 check_h "incorrect personality designator '42' in qualification '23@42'" -e trace=23@42,123 check_h "incorrect personality designator 'ohmy' in qualification '/getcwd@ohmy'" \ -e trace=/getcwd@ohmy check_h '--seccomp-bpf cannot be used without -f/--follow-forks, disabling -w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' --seccomp-bpf -w / check_h '--seccomp-bpf is not enabled for processes attached with -p -w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' --seccomp-bpf -f -p 1 -w check_h 'option -F is deprecated, please use -f/--follow-forks instead -w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' -F -w / check_h 'option -F is deprecated, please use -f/--follow-forks instead -w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' -FF -w / check_h 'deprecated option -F ignored -w/--summary-wall-clock must be given with (-c/--summary-only or -C/--summary)' -fF -w / check_e "invalid -e kvm= argument: 'chdir'" -e kvm=chdir check_e "invalid -e kvm= argument: 'chdir'" --kvm=chdir check_h "must have PROG [ARGS] or -p PID" -e decode-pid=all check_h "must have PROG [ARGS] or -p PID" --decode-pid=none check_h "must have PROG [ARGS] or -p PID" -e decode-pids=comm check_h "must have PROG [ARGS] or -p PID" --decode-pid=pidns,comm check_h "must have PROG [ARGS] or -p PID" -e decode-pid=\!pidns check_h "must have PROG [ARGS] or -p PID" --decode-pids=\!comm,pidns check_h "must have PROG [ARGS] or -p PID" -Y -e decode-pids=\!comm,pidns check_h "must have PROG [ARGS] or -p PID" --decode-pids=\!comm,pidns -Y check_h "must have PROG [ARGS] or -p PID" --pidns-translation -e decode-pids=\!comm,pidns -Y check_h "must have PROG [ARGS] or -p PID" --decode-pids=\!comm,pidns --pidns-translation check_e "invalid decode-pids ''" --decode-pids= check_e "invalid decode-pids ''" -e decode-pids= check_e "invalid decode-pids 'chdir'" --decode-pids=chdir check_e "invalid decode-pids 'gettid'" -e decode-pid=comm,gettid case "$STRACE_NATIVE_ARCH" in x86_64) check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@64 check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@32 check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@x32 ;; x32) check_h "incorrect personality designator '64' in qualification 'getcwd@64'" -e trace=getcwd@64 check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@32 check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@x32 ;; aarch64|powerpc64|s390x|sparc64|tile) check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@64 check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@32 check_h "incorrect personality designator 'x32' in qualification 'getcwd@x32'" -e trace=getcwd@x32 ;; *) pers="$((SIZEOF_LONG * 8))" inv_pers="$((96 - pers))" check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@"$pers" check_h "incorrect personality designator '$inv_pers' in qualification 'getcwd@$inv_pers'" -e trace=getcwd@"$inv_pers" check_h "incorrect personality designator 'x32' in qualification 'getcwd@x32'" -e trace=getcwd@x32 esac ../zeroargc "$STRACE_EXE" /bin/true 2> "$LOG" && dump_log_and_fail_with \ 'zeroargc strace failed to handle the error properly' cat > "$EXP" << __EOF__ $STRACE_EXE: must have PROG [ARGS] or -p PID Try '$STRACE_EXE -h' for more information. __EOF__ diff -u -- "$EXP" "$LOG" > /dev/null || { cat > "$EXP" <<- '__EOF__' strace: must have PROG [ARGS] or -p PID Try 'strace -h' for more information. __EOF__ match_diff "$LOG" "$EXP" \ "zeroargc $STRACE $args output mismatch" } uid="${UID:-`id -u`}" if [ "$uid" -ge 0 ]; then if [ "$uid" -eq 0 ]; then umsg="Cannot find user ':nosuchuser:'" else umsg='You must be root to use the -u/--username option' fi check_e "$umsg" -u :nosuchuser: true for c in i/--instruction-pointer n/--syscall-number r/--relative-timestamps t/--absolute-timestamps T/--syscall-times y/--decode-fds; do check_e "-$c has no effect with -c/--summary-only $STRACE_EXE: $umsg" -u :nosuchuser: -c -${c%%/*} true done check_e "-i/--instruction-pointer has no effect with -c/--summary-only $STRACE_EXE: -n/--syscall-number has no effect with -c/--summary-only $STRACE_EXE: -r/--relative-timestamps has no effect with -c/--summary-only $STRACE_EXE: -t/--absolute-timestamps has no effect with -c/--summary-only $STRACE_EXE: -T/--syscall-times has no effect with -c/--summary-only $STRACE_EXE: -y/--decode-fds has no effect with -c/--summary-only $STRACE_EXE: Only the last of -z/--successful-only/-Z/--failed-only options will take effect. See status qualifier for more complex filters. $STRACE_EXE: $umsg" -u :nosuchuser: -cinrtTyzZ true if [ -n "$compiled_with_secontext" ]; then check_e "--secontext has no effect with -c/--summary-only $STRACE_EXE: $umsg" -u :nosuchuser: -c --secontext true else check_e "SELinux context printing (--secontext option) is not supported by this build of strace" -c --secontext true fi if [ -n "$compiled_with_stacktrace" ]; then check_e "-k/--stack-traces has no effect with -c/--summary-only $STRACE_EXE: $umsg" -u :nosuchuser: -c -k true fi for c in --output-separately -A/--output-append-mode; do check_e "$c has no effect without -o/--output $STRACE_EXE: $umsg" -u :nosuchuser: ${c%%/*} true done check_e "-S/--summary-sort-by has no effect without (-c/--summary-only or -C/--summary) $STRACE_EXE: $umsg" -u :nosuchuser: --summary-sort-by errors true check_e "--output-separately has no effect without -o/--output $STRACE_EXE: -A/--output-append-mode has no effect without -o/--output $STRACE_EXE: $umsg" -u :nosuchuser: --output-separately --output-append-mode true check_e "$umsg" -u :nosuchuser: -ff true check_e "$umsg" -u :nosuchuser: --output-separately --follow-forks true check_e "Only the last of -z/--successful-only/-Z/--failed-only options will take effect. See status qualifier for more complex filters. $STRACE_EXE: $umsg" -u :nosuchuser: -z --successful-only true check_e "Only the last of -z/--successful-only/-Z/--failed-only options will take effect. See status qualifier for more complex filters. $STRACE_EXE: $umsg" -u :nosuchuser: --successful-only -Z true check_e "Only the last of -z/--successful-only/-Z/--failed-only options will take effect. See status qualifier for more complex filters. $STRACE_EXE: $umsg" -u :nosuchuser: --successful-only --failed-only true check_e "-n/--syscall-number has no effect with -c/--summary-only $STRACE_EXE: $umsg" --user=:nosuchuser: --syscall-number --summary-only true check_e "-i/--instruction-pointer has no effect with -c/--summary-only $STRACE_EXE: $umsg" --user=:nosuchuser: --instruction-pointer --summary-only true fi check_e_using_grep 'ptrace_setoptions = 0x[[:xdigit:]]+' -d / check_e_using_grep 'ptrace_setoptions = 0x[[:xdigit:]]+' --debug / if [ -z "$compiled_with_stacktrace" ]; then check_e "Stack traces (-k/--stack-traces option) are not supported by this build of strace" -k check_e "Stack traces (-k/--stack-traces option) are not supported by this build of strace" --stack-traces fi args='-p 2147483647' $STRACE $args 2> "$LOG" && dump_log_and_fail_with \ "strace $args failed to handle the error properly" for cmd in PTRACE_SEIZE PTRACE_ATTACH; do cat > "$EXP" << __EOF__ $STRACE_EXE: attach: ptrace($cmd, 2147483647): No such process __EOF__ diff -- "$EXP" "$LOG" || continue args= break done [ -z "$args" ] || dump_log_and_fail_with \ "strace $args failed to print expected diagnostics"