從linux shell中的'ftp'命令獲取退出狀態代碼

Question

我需要從命令行程序中檢索退出狀態代碼。 不用擔心，我用過$？ 但對於ftp，即使它沒有連接，也會打開ftp shell，所以我無法理解連接沒有發生。

試試這段代碼吧：

#!/bin/sh

ftp 1234567
OUT=$?
if [ $OUT -eq 0 ];then
   echo "ftp OK"
else
   echo "ftp Error: "$OUT
fi

exit 0

有幫助嗎？ 謝謝菲利波

Answer 1

您應該從ftp命令中尋找成功消息，而不是尋找狀態。 這是“226轉移完成”。 您可以在系統上使用ftp manual確認。

200 PORT command successful.
150 Opening ASCII mode data connection for filename.
226 Transfer complete.
189 bytes sent in 0.145 seconds (0.8078 Kbytes/s)

這是一個示例腳本。

FTPLOG=/temp/ftplogfile
ftp -inv <<! > $FTPLOG
open server
user ftp pwd
put filename
close
quit
!

FTP_SUCCESS_MSG="226 Transfer complete"
if fgrep "$FTP_SUCCESS_MSG" $FTPLOG ;then
   echo "ftp OK"
else
   echo "ftp Error: "$OUT
fi
exit 0

Answer 2

如果您需要下載某些內容並查看下載是否成功，為什么不使用wget ？ 它支持FTP協議。

它將使用多個返回代碼報告下載狀態（手冊頁引用）：

EXIT STATUS
   Wget may return one of several error codes if it encounters problems.
   0   No problems occurred.
   1   Generic error code.
   2   Parse error---for instance, when parsing command-line options, the .wgetrc or .netrc...
   3   File I/O error.
   4   Network failure.
   5   SSL verification failure.
   6   Username/password authentication failure.
   7   Protocol errors.
   8   Server issued an error response.

Answer 3

請嘗試以下腳本。

復印：

#!/bin/bash
# cftp.sh
# set -x

FTPSERVER="$1"
FTPPORT="$2"
REMOTEDIR="$3"

[[ "$REMOTEDIR" ]] || { echo -e "Usage: $0 <ftpserver> <ftpport> <remotedir> [file1] [file2] ..." > /dev/stderr ; exit 1 ; }

L=$((BASH_ARGC-3))

LOCALFILES=("${BASH_ARGV[@]:0:$L}")

RETCODE=0

for LOCALFILE in "${LOCALFILES[@]}"
do
  THISRETCODE=0
  [[ -f "$LOCALFILE" ]] || THISRETCODE=1

  LOCALDIR="$(dirname "$LOCALFILE")"
  LOCALFILENAME="$(basename "$LOCALFILE")"

  [[ $THISRETCODE = 0 ]] &&
  /usr/bin/ftp -iv "$FTPSERVER" << EOF | grep -q '226 Transfer complete' || THISRETCODE=1
    lcd $LOCALDIR
    cd $REMOTEDIR
    put $LOCALFILENAME
EOF

  RETCODE=$((RETCODE+THISRETCODE))
done

exit $RETCODE

移動：

#!/bin/bash
# mftp.sh
# set -x

FTPSERVER="$1"
FTPPORT="$2"
REMOTEDIR="$3"

[[ "$REMOTEDIR" ]] || { echo -e "Usage: $0 <ftpserver> <ftpport> <remotedir> [file1] [file2] ..." > /dev/stderr ; exit 1 ; }

L=$((BASH_ARGC-3))

LOCALFILES=("${BASH_ARGV[@]:0:$L}")

RETCODE=0

for LOCALFILE in "${LOCALFILES[@]}"
do
  THISRETCODE=0
  [[ -f "$LOCALFILE" ]] || THISRETCODE=1

  LOCALDIR="$(dirname "$LOCALFILE")"
  LOCALFILENAME="$(basename "$LOCALFILE")"

  [[ $THISRETCODE = 0 ]] &&
  /usr/bin/ftp -iv "$FTPSERVER" << EOF | grep -q '226 Transfer complete' || THISRETCODE=1
    lcd $LOCALDIR
    cd $REMOTEDIR
    put $LOCALFILENAME
EOF

  [[ $THISRETCODE = 0 ]] &&
  /bin/rm -f "$LOCALFILE" || THISRETCODE=1

  RETCODE=$((RETCODE+THISRETCODE))
done

exit $RETCODE

以下是一些測試用例：

用於復制。

$ ./cftp.sh ; echo return code: $?
Usage: ./cftp.sh <ftpserver> <ftpport> <remotedir> [file1] [file2] ...
return code: 1
$ ./cftp.sh ftpserver 21 /mnt/disk4/d0/test ; echo return code: $?
return code: 0
$ ./cftp.sh ftpserver 21 /mnt/disk4/d0/test cftp.sh mftp.sh ; echo return code: $?
return code: 0
$ ./cftp.sh ftpserver 21 /mnt/disk4/d0/test *ftp.sh ; echo return code: $?
return code: 0
$ ./cftp.sh ftpserver 21 /mnt/disk4/d0/test cftp.s ; echo return code: $?
return code: 1
$ ./cftp.sh ftpserver 21 /mnt/disk4/d0/test cftp.s mftp.s ; echo return code: $?
return code: 2
$ ./cftp.sh ftpserver 21 /mnt/disk4/d0/tes cftp.sh ; echo return code: $?
return code: 1

為了移動。

$ ./mftp.sh ftpserver 21 /mnt/disk4/d0/test cftp.sh ; echo return code: $?
/bin/rm: cannot remove `cftp.sh': Permission denied
return code: 1
$ echo foo > /tmp/bar
$ ./mftp.sh ftpserver 21 /mnt/disk4/d0/test /tmp/bar ; echo return code: $?
return code: 0
$ ls -lha /tmp/bar
ls: cannot access /tmp/bar: No such file or directory

更新：記得閱讀man 5 netrc

Answer 4

一些腳本做 -

ftp -n $HOST > /tmp/ftp.worked 2> /tmp/ftp.failed <<END_SCRIPT
blah blah
END_SCRIPT

EXITSTATUS=$?

if [ $EXITSTATUS != "0" ]
then
    # handle the error...
fi 

除了以上並不總是有效之外 - 大多數FTP客戶端總是以狀態0退出。這會導致丑陋的“漏報”：文件傳輸失敗，但腳本沒有檢測到問題。

驗證文件傳輸發生的一種方法 - 將其傳回：

#!/bin/sh

ftp -n << END_SCRIPT
open $1
user $2 $3
put $4
get $4 retrieval.$$
bye
END_SCRIPT

if [ -f retrieval.$$ ]
then
    echo "FTP of $4 to $1 worked"
    rm -f retrieval.$$
else
    echo "FTP of $4 did not work"
fi

Answer 5

另一種方法是檢查您的服務器上是否有文件傳輸！

就像是...

 if ![ -s "$INPUT_DIR/HOP_PSA_Transactions_$BATCH_ID.csv" ] then ## No Transactions file FAIL_TIME=`date +"%d-%m-%Y %H:%M"` echo "ERROR: File HOP_PSA_Transactions_$BATCH_ID.csv not found @ $FAIL_TIME" >>$LOGFILE_DIR$LOGFILE_NAME exit $ERR_NO_TRANS_FILE fi 

如果它不在那里那么它沒有成功轉移！

Answer 6

我最后一次需要在腳本中使用ftp時，我對它感到非常沮喪，我終於找到了一個獲得BSD許可的ftp客戶端源代碼並簡單地修改它以給它我需要的行為，並使用它而不是提供的版本操作系統。

丑陋，但立方體牆上的頭部凹痕的深度開始變得荒謬