調度python腳本時出錯：fcron [12036]：無法執行'/ usr / bin / sendmail'：沒有這樣的文件或目錄

Question

我有一個python腳本，我想用fcrontab安排。 此腳本根據其中一列中設置的狀態字段發送電子郵件。 當我調用以下內容時，腳本以預期的方式執行：

python2 mail.py

這導致以下和預期的輸出：

Successfully sent email... 
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx
Update sent status on EdPost...  xxxxxx

但是，當我嘗試將此腳本作為cron作業運行時，我最終得到了上述錯誤。

克龍：

0 15 * * * /home/x/JobParse/mail.py >> /home/x/JobParse/mailer.log

錯誤：

fcron[23191]: Couldn't exec '/usr/bin/sendmail': No such file or directory

我有另一個python腳本以類似的方式安排，與#!/usr/bin/env python2 shebang運行良好。 該腳本不使用smtplib庫。

我正在嘗試安排的腳本如下：

mail.py

#!/usr/bin/python2
import smtplib
from db import get_records,update_sent_status
import traceback
import datetime
configs = [line.rstrip('\n') for line in open('configs')]
usr = configs[0]
pwd = configs[1]
rcvr = configs[2]
receivers = [rcvr]
date = datetime.datetime.now().date()
posts = []
edpost_tbl_rows= ""
appli_tbl_rows= ""

ed_posts = get_records(0) # * non-appli and  unsent
ed_posts_ids = [row[0] for row in ed_posts]
ed_posts_sent = get_records(1) # post_id

uniq_appli = get_records(2) # unique unsent appli
uniq_appli_ids = [row[0] for row in uniq_appli]

all_appli_sent = [row[0] for row in get_records(4)] # all app_id sent
all_appli_unsent = [row[0] for row in get_records(5)] # all app_id unsent


# No jobs to send so exit
if len(all_appli_unsent) == 0 and len(ed_posts) == 0:
    print "Exit: No new unique posts.."
    exit()

# Transform db data into html table row format
for row in ed_posts:
    edpost_tbl_rows += \
            "<tr style=\"border:1px solid black\"><td style=\"border:1px solid black\">"\
            +str(row[0])\
            +"</td><td style=\"border:1px solid black\"><a href="\
            +'"'\
            +row[1]\
            +'"'\
            +">"\
            +row[4]\
            +"</a></td><td style=\"border:1px solid black\">"\
            +row[5]\
            +"</td><td style=\"border:1px solid black\">"\
            +row[6]\
            +"</td></tr>"

# Transform applitrack posts into html table
for row in uniq_appli:
    # check if sent before - app_id not unique on edpost
    if row[3] not in all_appli_sent:
        print "New unique & unsent applitrack post... ",row[3]
        appli_tbl_rows += \
            "<tr style=\"border:1px solid black\"><td style=\"border:1px solid black\">"\
            +str(row[0])\
            +"</td><td style=\"border:1px solid black\"><a href="\
            +'"'\
            +row[2]\
            +'"'\
            +">"\
            +str(row[3])\
            +"</a></td><td style=\"border:1px solid black\"><a href="\
            +'"'\
            +row[1]\
            +'"'\
            +">"\
            +row[4]\
            +"</a></td><td style=\"border:1px solid black\">"\
            +row[5]\
            +"</td><td style=\"border:1px solid black\">"\
            +row[6]\
            +"</td></tr>"
    else:
        print "Skipping applitrack post... ",row[3]


message = """From: JobUpdates <{usr}>
To: xxxx <{rcvr}>
MIME-Version: 1.0
Content-type: text/html; charset=utf-8
Subject: New Job Postings: {date}

<p>Check out these postings you may have not have seen yet :)</p>
<p>Searched: words

<h2>Jobs With Applitrack</h2>
<table style="width:100%;border:1px solid black">
    <tr style="border:1px solid black">
        <th style="border:1px solid black">EdPost ID</th>
        <th style="border:1px solid black">AppliTrack ID</th>
        <th style="border:1px solid black">Description</th>
        <th style="border:1px solid black">Post DT</th>
        <th style="border:1px solid black">Exp DT</th>
    </tr>
    {appli_tbl_rows}
</table>
</br>
</br>
<h2>Jobs Without Applitrack</h2>
<table style="width:100%;border:1px solid black">
    <tr style="border:1px solid black">
        <th style="border:1px solid black">EdPost ID</th>
        <th style="border:1px solid black">Description</th>
        <th style="border:1px solid black">Post DT</th>
        <th style="border:1px solid black">Exp DT</th>
    </tr>
    {edpost_tbl_rows}
</table>
""".format(usr=usr,rcvr=rcvr,date=date,edpost_tbl_rows=edpost_tbl_rows,appli_tbl_rows=appli_tbl_rows)

try:
    smtpObj = smtplib.SMTP('localhost',1025)
    smtpObj.login(usr,pwd)
    smtpObj.sendmail(usr, rcvr, message)
    print "Successfully sent email... "
    for post_id in ed_posts_ids:
        print "Update sent status on EdPost... ",post_id
        update_sent_status(post_id)

    for app_id in all_appli_unsent:
        print "Update sent status on Appli... ",app_id
        update_sent_status(app_id,1)

except smtplib.SMTPException:
    print "ERROR: unable to send email... "
    print traceback.format_exc()

我用#!/usr/bin/env python2 shebang試過這個也無濟於事。

Answer 1

我能夠在不安裝sendmail的情況下解決問題。 這是通過將Python路徑移動到腳本開頭來完成的，如下所示：

import os
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.chdir(dname)

見Pitto的答案在這里 。

我猜測從crontab本身更新cron環境的路徑變量也是一個可行的解決方案。