#!/bin/sh

# Check how ftruncate, lseek and stat family syscalls are traced.

. "${srcdir=.}/init.sh"

check_prog dd
check_prog find
check_prog grep

OUT="$LOG.out"
size=46118400000
sample=stat_sample

rm -f $sample
umask 022

truncate_cmd="dd seek=$size bs=1 count=0 if=/dev/null of=$sample"
$truncate_cmd > "$OUT" 2>&1 || {
	cat "$OUT"
	framework_skip_ 'failed to create a large sparse file'
}

find_cmd="find $sample -quit"
$find_cmd || framework_skip_ "$find_cmd failed"

find_L_cmd="find -L $sample -quit"
$find_L_cmd || framework_skip_ "$find_L_cmd failed"

rm -f $sample

$STRACE -o "$LOG" -edesc $truncate_cmd 2>&1 > "$OUT" 2>&1 || {
	cat "$LOG" "$OUT"
	fail_ "$STRACE -edesc $truncate_cmd failed"
}

rm -f "$OUT"

r_ftruncate="ftruncate(64)?\\(1, $size\\) += 0"
LC_ALL=C grep -E -x "$r_ftruncate" "$LOG" > /dev/null || {
	cat "$LOG"
	fail_ 'strace -edesc failed to trace ftruncate/ftruncate64 properly'
}

r_lseek="lseek\\(1, $size, SEEK_CUR\\) += $size"
r_llseek="_llseek\\(1, $size, \\[$size\\], SEEK_CUR\\) += 0"
LC_ALL=C grep -E -x "$r_lseek|$r_llseek" "$LOG" > /dev/null || {
	cat "$LOG"
	fail_ 'strace -edesc failed to trace lseek/_llseek properly'
}

$STRACE -o "$LOG" -efile $find_L_cmd || {
	cat "$LOG"
	fail_ "$STRACE -efile $find_L_cmd failed"
}

stat="\\{st_mode=S_IFREG\\|0644, st_size=$size, \\.\\.\\.\\}"
r_stat="stat(64)?\\(\"$sample\", $stat\\) += 0"
r_fstatat="(new)?fstatat(64)?\\(AT_FDCWD, \"$sample\", $stat, 0\\) += 0"
LC_ALL=C grep -E -x "$r_stat|$r_fstatat" "$LOG" > /dev/null || {
	cat "$LOG"
	fail_ 'strace -efile failed to trace stat/stat64 properly'
}

$STRACE -o "$LOG" -efile $find_cmd || {
	cat "$LOG"
	fail_ "$STRACE -efile $find_cmd failed"
}

r_lstat="lstat(64)?\\(\"$sample\", $stat\\) += 0"
r_lfstatat="(new)?fstatat(64)?\\(AT_FDCWD, \"$sample\", $stat, AT_SYMLINK_NOFOLLOW\\) += 0"
LC_ALL=C grep -E -x "$r_lstat|$r_lfstatat" "$LOG" > /dev/null || {
	cat "$LOG"
	fail_ 'strace -efile failed to trace fstatat/fstatat64 properly'
}

rm -f $sample

exit 0