bash - Shell script strange echo behavior -

i want print content have obtained split of array in way :

string="abc test;abctest.it"  ifs=';' read -a array <<< "$string" name="${array[0]}" url="${array[1]}"  echo -ne "\n$url,$name" >> "$outputdir/$filename" 

but output file doesn't contain url part

i think problem "." don't know how fix it

if try

echo $url 

it's work!

thanks

---

i've tried printf , hardcoded filename nothing!

printf '%s %s\n' "$url" "$name"  >> test.txt 

it seems when try concatenate thing after variable $url part of variable deleted or overwritten output file

for example if try

printf '%s %s\n' "$url" "pp"  >> test.txt 

what simple cat test.txt :

 pptest.it 

but content of variable $url must abctest.it

it's strange

to complement chepner's helpful answer:

• if output doesn't look expect like, it's worth examining contents hidden control characters may change data's appearance on output.

• \r, cr (carriage return; ascii value 13) notorious example 2 reasons:

  • (as @chepner has stated) moves cursor beginning of line mid-string, erasing @ least part of came before it; e.g.:
    • echo $'abcd\refg' prints efgd: \r causes after restart printing @ beginning of line, d string before \r surviving, because happened be 1 char. longer string came after.
      (note: $'...' syntax so-called ansi c-quoted string, allows use of escape sequences such \r in $'...\r...' create actual control characters.)
  • files unexpected \r chars. occur when interfacing windows world, line breaks aren't \n chars., \r\n sequences, , such files behave strangely in unix world.
• a simple way examine data pipe cat -et, highlights control characters ^<char> sequences:
  • ^m represents \r (cr)
  • ^i represents \t (tab. char)
  • ^[ represents esc char.
  • ... # see 'man cat'
  • the end of line represented $
  • thus, file windows-style line endings show ^m$ @ end of lines output cat -et.
• cat -et applied above example yields following, makes easy diagnose problem:
  • echo $'abcd\refg' | cat -et # -> 'abcd^mefg$' - note ^m
• dos2unix go-to tool converting windows-style line endings (\r\n) unix ones (\r\n), tool doesn't come preinstalled on unix-like platforms, , it's easy use standard posix utilities perform such conversion:
  • awk 'sub("\r$", "")+1' win.txt > unix.txt
  • note posix-compliant command doesn't allow replace file in-place, however:
    • if have gnu sed, following perform conversion in place:
      • sed -i 's/\r$//' winin_unixout.txt
    • ditto bsd sed (also used on osx), bash, ksh, or zsh:
      • sed -i '' $'s/\r$//' winin_unixout.txt