{"id":33825,"date":"2025-11-07T15:41:27","date_gmt":"2025-11-07T12:41:27","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=33825"},"modified":"2025-11-07T15:41:27","modified_gmt":"2025-11-07T12:41:27","slug":"giris-python-ile-sistem-komutlarini-calistirmak","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/","title":{"rendered":"Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak"},"content":{"rendered":"

<\/p>\n

Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak<\/h2>\n

Python, otomasyon, sistem y\u00f6netimi ve di\u011fer uygulamalar i\u00e7in g\u00fc\u00e7l\u00fc bir dil olup, harici programlar\u0131 veya i\u015fletim sistemi komutlar\u0131n\u0131 \u00e7al\u0131\u015ft\u0131rma yetene\u011fi, i\u015flevselli\u011fini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r. Bir Python beti\u011fi i\u00e7inden bir kabuk komutu \u00e7al\u0131\u015ft\u0131rmak, sistemdeki ara\u00e7larla etkile\u015fim kurman\u0131za, veritaban\u0131 yedeklemeleri alman\u0131za, dosya i\u015flemleri yapman\u0131za veya \u00f6zel komut dosyalar\u0131n\u0131 tetiklemenize olanak tan\u0131r. Python’da bu t\u00fcr g\u00f6revleri yerine getirmek i\u00e7in tarihsel olarak farkl\u0131 y\u00f6ntemler bulunsa da, g\u00fcn\u00fcm\u00fczde os.system()<\/code> ve \u00f6zellikle subprocess<\/code> mod\u00fcl\u00fc en yayg\u0131n kullan\u0131lan yakla\u015f\u0131mlard\u0131r.<\/p>\n

Bu rehberde, Python’da sistem komutlar\u0131n\u0131 \u00e7al\u0131\u015ft\u0131rman\u0131n temel yollar\u0131n\u0131, os.system()<\/code> ve subprocess.call()<\/code> fonksiyonlar\u0131n\u0131 detayl\u0131ca inceleyece\u011fiz. Her bir y\u00f6ntemin avantajlar\u0131n\u0131, dezavantajlar\u0131n\u0131, kullan\u0131m senaryolar\u0131n\u0131 ve g\u00fcvenlik hususlar\u0131n\u0131 pratik kod \u00f6rnekleriyle a\u00e7\u0131klayaca\u011f\u0131z. Amac\u0131m\u0131z, Python projelerinizde harici komutlar\u0131 g\u00fcvenli ve etkili bir \u015fekilde nas\u0131l entegre edece\u011finizi anlaman\u0131za yard\u0131mc\u0131 olmakt\u0131r.<\/p>\n

os.system(): Basit Komut \u00c7al\u0131\u015ft\u0131rma<\/h2>\n

os.system()<\/code> fonksiyonu, Python’da sistem komutlar\u0131n\u0131 \u00e7al\u0131\u015ft\u0131rmak i\u00e7in en eski ve en basit y\u00f6ntemlerden biridir. Bu fonksiyon, verilen komut dizisini i\u015fletim sisteminin kabu\u011funda (shell) y\u00fcr\u00fct\u00fcr ve komutun tamamlanmas\u0131n\u0131 bekler.<\/p>\n

Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/h3>\n

os.system()<\/code> fonksiyonu, kendisine arg\u00fcman olarak verilen stringi do\u011frudan i\u015fletim sisteminin kabu\u011funa iletir. Bu, komutun kabuk taraf\u0131ndan yorumland\u0131\u011f\u0131 ve \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131 anlam\u0131na gelir. Komutun \u00e7\u0131kt\u0131s\u0131 do\u011frudan Python beti\u011finin standart \u00e7\u0131kt\u0131s\u0131na (stdout) veya standart hatas\u0131na (stderr) g\u00f6nderilir ve Python kodu bu \u00e7\u0131kt\u0131y\u0131 yakalayamaz. Fonksiyon, \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131 komutun \u00e7\u0131k\u0131\u015f durumunu (exit status) d\u00f6nd\u00fcr\u00fcr. Genellikle 0, komutun ba\u015far\u0131yla tamamland\u0131\u011f\u0131n\u0131, s\u0131f\u0131rdan farkl\u0131 bir de\u011fer ise bir hata olu\u015ftu\u011funu g\u00f6sterir.<\/p>\n

S\u00f6zdizimi ve \u00d6rnekler<\/h3>\n
import os\n\n
Basit bir komut \u00e7al\u0131\u015ft\u0131rma<\/h2>\nprint(\"--- os.system() ile ls -l ---\")\nexit_code_ls = os.system(\"ls -l\")\nprint(f\"ls -l komutunun \u00e7\u0131k\u0131\u015f kodu: {exit_code_ls}\")\n\n
Hatal\u0131 bir komut \u00e7al\u0131\u015ft\u0131rma<\/h2>\nprint(\"\\n--- os.system() ile hatal\u0131 komut ---\")\nexit_code_error = os.system(\"komut_yok_boyle_bisey\")\nprint(f\"Hatal\u0131 komutun \u00e7\u0131k\u0131\u015f kodu: {exit_code_error}\")\n\n
Windows'ta \u00f6rnek (cmd.exe \u00fczerinden)<\/h2>\n
import platform<\/h2>\n
if platform.system() == \"Windows\":<\/h2>\n
print(\"\\n--- os.system() ile Windows komutu (dir) ---\")<\/h2>\n
exit_code_dir = os.system(\"dir\")<\/h2>\n
print(f\"dir komutunun \u00e7\u0131k\u0131\u015f kodu: {exit_code_dir}\")<\/code><\/pre>\n<\/h2>\n
Yukar\u0131daki \u00f6rnekte, ls -l<\/code> komutu \u00e7al\u0131\u015ft\u0131r\u0131l\u0131r ve \u00e7\u0131kt\u0131s\u0131 do\u011frudan konsola yaz\u0131l\u0131r. Komut ba\u015far\u0131yla tamamland\u0131\u011f\u0131 i\u00e7in exit_code_ls<\/code> genellikle 0 d\u00f6necektir (Unix benzeri sistemlerde). \u0130kinci \u00f6rnekte ise var olmayan bir komut \u00e7al\u0131\u015ft\u0131r\u0131lmaya \u00e7al\u0131\u015f\u0131l\u0131r ve bu durumda s\u0131f\u0131rdan farkl\u0131 bir \u00e7\u0131k\u0131\u015f kodu al\u0131n\u0131r.<\/p>\n
os.system()’\u0131n Avantajlar\u0131 ve Dezavantajlar\u0131<\/h3>\n
Avantajlar\u0131:<\/strong>
\n*   Basitlik:<\/strong> \u00c7ok basit komutlar\u0131 h\u0131zl\u0131ca \u00e7al\u0131\u015ft\u0131rmak i\u00e7in kolay bir s\u00f6zdizimi sunar. Tek bir sat\u0131rda kullan\u0131labilir.<\/p>\n
Dezavantajlar\u0131:<\/strong>
\n*   G\u00fcvenlik Riskleri (Shell Injection):<\/strong> En b\u00fcy\u00fck dezavantaj\u0131 g\u00fcvenliktir. Kullan\u0131c\u0131dan al\u0131nan girdileri do\u011frudan os.system()<\/code>‘e iletmek, “shell injection” sald\u0131r\u0131lar\u0131na yol a\u00e7abilir. K\u00f6t\u00fc niyetli bir kullan\u0131c\u0131, komut dizisine ek komutlar ekleyerek sistem \u00fczerinde istenmeyen i\u015flemler yapabilir.<\/p>\n
# K\u00f6t\u00fc bir \u00f6rnek: G\u00fcvenlik a\u00e7\u0131\u011f\u0131 i\u00e7erir!\n    # user_input = input(\"Dosya ad\u0131 girin: \") # Kullan\u0131c\u0131 \"dosya.txt; rm -rf \/\" girebilir\n    # os.system(f\"cat {user_input}\")<\/code><\/pre>\n
*   \u00c7\u0131kt\u0131 Yakalama Yok:<\/strong> \u00c7al\u0131\u015ft\u0131r\u0131lan komutun standart \u00e7\u0131kt\u0131s\u0131n\u0131 (stdout) veya standart hatas\u0131n\u0131 (stderr) Python de\u011fi\u015fkenlerine yakalaman\u0131n do\u011frudan bir yolu yoktur. \u00c7\u0131kt\u0131 do\u011frudan konsola yaz\u0131l\u0131r.
\n*   Kontrol Eksikli\u011fi:<\/strong> Komutun \u00e7al\u0131\u015fma dizinini, ortam de\u011fi\u015fkenlerini veya giri\u015f\/\u00e7\u0131k\u0131\u015f ak\u0131\u015flar\u0131n\u0131 ayr\u0131nt\u0131l\u0131 olarak kontrol etme yetene\u011fi s\u0131n\u0131rl\u0131d\u0131r.
\n*   Bloklama:<\/strong> Komut tamamlanana kadar Python beti\u011finin y\u00fcr\u00fct\u00fclmesini durdurur (bloklar).
\n*   Platform Ba\u011f\u0131ml\u0131l\u0131\u011f\u0131:<\/strong> Kabuk komutlar\u0131 i\u015fletim sistemine g\u00f6re farkl\u0131l\u0131k g\u00f6sterebilir (\u00f6rn: ls<\/code> vs dir<\/code>).<\/p>\n
Bu dezavantajlar nedeniyle, os.system()<\/code> modern Python uygulamalar\u0131nda genellikle tavsiye edilmez. \u00d6zellikle kullan\u0131c\u0131 girdisi i\u00e7eren veya komut \u00e7\u0131kt\u0131s\u0131n\u0131n i\u015flenmesi gereken durumlarda kesinlikle ka\u00e7\u0131n\u0131lmal\u0131d\u0131r.<\/p>\n
subprocess Mod\u00fcl\u00fc: Modern ve G\u00fcvenli Yakla\u015f\u0131m<\/h2>\n
Python’\u0131n subprocess<\/code> mod\u00fcl\u00fc, os.system()<\/code>, os.spawn<\/code> ailesi ve popen<\/em><\/code> gibi eski fonksiyonlar\u0131n yerine ge\u00e7mek \u00fczere tasarlanm\u0131\u015f modern ve g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. Bu mod\u00fcl, yeni s\u00fcre\u00e7ler olu\u015fturmak, giri\u015f\/\u00e7\u0131k\u0131\u015f borular\u0131n\u0131 y\u00f6netmek, hata kodlar\u0131n\u0131 kontrol etmek ve s\u00fcre\u00e7lerle daha ayr\u0131nt\u0131l\u0131 etkile\u015fim kurmak i\u00e7in kapsaml\u0131 bir API sunar.<\/p>\n
subprocess<\/code> mod\u00fcl\u00fc, harici komutlar\u0131 \u00e7al\u0131\u015ft\u0131rma konusunda \u00e7ok daha fazla esneklik, g\u00fcvenlik ve kontrol sa\u011flar. Temel olarak, i\u015fletim sisteminin bir alt s\u00fcrecini (subprocess) ba\u015flat\u0131r ve bu s\u00fcre\u00e7le ileti\u015fim kurman\u0131za olanak tan\u0131r.<\/p>\n
subprocess<\/code> mod\u00fcl\u00fcn\u00fcn temel fonksiyonlar\u0131 \u015funlard\u0131r:
\n*   subprocess.run()<\/code>: Python 3.5 ve sonraki s\u00fcr\u00fcmlerde \u00f6nerilen, en genel ama\u00e7l\u0131 fonksiyondur. Komutu \u00e7al\u0131\u015ft\u0131r\u0131r, tamamlanmas\u0131n\u0131 bekler, \u00e7\u0131k\u0131\u015f kodunu ve \u00e7\u0131kt\u0131y\u0131 (iste\u011fe ba\u011fl\u0131 olarak) yakalar.
\n*   subprocess.call()<\/code>: Komutu \u00e7al\u0131\u015ft\u0131r\u0131r, tamamlanmas\u0131n\u0131 bekler ve \u00e7\u0131k\u0131\u015f kodunu d\u00f6nd\u00fcr\u00fcr. \u00c7\u0131kt\u0131y\u0131 yakalamaz.
\n*   subprocess.check_call()<\/code>: subprocess.call()<\/code> gibidir ancak komut s\u0131f\u0131r olmayan bir \u00e7\u0131k\u0131\u015f koduyla biterse CalledProcessError<\/code> istisnas\u0131 y\u00fckseltir.
\n*   subprocess.check_output()<\/code>: Komutu \u00e7al\u0131\u015ft\u0131r\u0131r, tamamlanmas\u0131n\u0131 bekler ve komutun standart \u00e7\u0131kt\u0131s\u0131n\u0131 (stdout) d\u00f6nd\u00fcr\u00fcr. S\u0131f\u0131r olmayan bir \u00e7\u0131k\u0131\u015f kodu durumunda CalledProcessError<\/code> y\u00fckseltir.
\n*   subprocess.Popen<\/code>: En d\u00fc\u015f\u00fck seviyeli ve en esnek aray\u00fczd\u00fcr. S\u00fcreci ba\u015flat\u0131r ve hemen geri d\u00f6ner, b\u00f6ylece Python program\u0131 s\u00fcreci bloke etmeden ba\u015fka i\u015fler yapabilir. S\u00fcrecin giri\u015f\/\u00e7\u0131k\u0131\u015f ak\u0131\u015flar\u0131n\u0131 manuel olarak y\u00f6netmenizi sa\u011flar.<\/p>\n
Bu rehberde, \u00f6zellikle subprocess.call()<\/code> fonksiyonuna odaklanaca\u011f\u0131z, \u00e7\u00fcnk\u00fc os.system()<\/code>‘\u0131n do\u011frudan yerine ge\u00e7ebilecek, benzer bir bloklama davran\u0131\u015f\u0131na sahip, ancak daha fazla kontrol sunan bir alternatiftir.<\/p>\n
subprocess.call(): Geli\u015fmi\u015f Komut Y\u00f6netimi<\/h2>\n
subprocess.call()<\/code> fonksiyonu, bir komutu \u00e7al\u0131\u015ft\u0131r\u0131r, komutun tamamlanmas\u0131n\u0131 bekler ve ard\u0131ndan komutun \u00e7\u0131k\u0131\u015f kodunu d\u00f6nd\u00fcr\u00fcr. os.system()<\/code> ile benzer \u015fekilde, varsay\u0131lan olarak komutun \u00e7\u0131kt\u0131s\u0131n\u0131 yakalamaz; \u00e7\u0131kt\u0131lar do\u011frudan ebeveyn s\u00fcrecin (Python beti\u011finizin) standart \u00e7\u0131kt\u0131\/hata ak\u0131\u015flar\u0131na y\u00f6nlendirilir. Ancak, os.system()<\/code>‘dan farkl\u0131 olarak, subprocess.call()<\/code> daha g\u00fcvenli arg\u00fcman i\u015fleme ve daha fazla yap\u0131land\u0131rma se\u00e7ene\u011fi sunar.<\/p>\n
S\u00f6zdizimi ve Temel Parametreler<\/h3>\n
subprocess.call()<\/code>‘\u0131n temel s\u00f6zdizimi \u015f\u00f6yledir:<\/p>\n
subprocess.call(args, , stdin=None, stdout=None, stderr=None, shell=False, cwd=None, env=None, timeout=None, <\/em>*kwargs)<\/code><\/pre>\n
En \u00f6nemli parametreleri inceleyelim:<\/p>\n
*   args<\/code> (gerekli):<\/strong> \u00c7al\u0131\u015ft\u0131r\u0131lacak komut ve arg\u00fcmanlar\u0131d\u0131r.
\n    *   Liste olarak (\u00f6nerilir):<\/strong> En g\u00fcvenli ve \u00f6nerilen y\u00f6ntem, komutu ve her bir arg\u00fcman\u0131n\u0131 ayr\u0131 ayr\u0131 stringler olarak i\u00e7eren bir liste vermektir. \u00d6rne\u011fin: [\"ls\", \"-l\", \"\/tmp\"]<\/code>. Bu durumda shell=False<\/code> varsay\u0131lan olarak kullan\u0131l\u0131r ve kabuk yorumlamas\u0131 olmaz, dolay\u0131s\u0131yla shell injection riski ortadan kalkar.
\n    *   Tek bir string olarak:<\/strong> E\u011fer shell=True<\/code> olarak ayarlan\u0131rsa, args<\/code> tek bir string olabilir. Bu durumda string, i\u015fletim sisteminin kabu\u011fu taraf\u0131ndan yorumlan\u0131r. Bu, kabuk \u00f6zellikleri (boru hatlar\u0131, joker karakterler vb.) kullanmak istedi\u011finizde faydal\u0131 olabilir ancak g\u00fcvenlik riski ta\u015f\u0131r.
\n*   shell<\/code> (varsay\u0131lan: False<\/code>):<\/strong> True<\/code> olarak ayarlan\u0131rsa, komut i\u015fletim sisteminin kabu\u011fu \u00fczerinden \u00e7al\u0131\u015ft\u0131r\u0131l\u0131r. False<\/code> oldu\u011funda, komut do\u011frudan \u00e7al\u0131\u015ft\u0131r\u0131l\u0131r ve kabuk \u00f6zellikleri kullan\u0131lamaz. G\u00fcvenlik nedeniyle genellikle False<\/code> tutulmas\u0131 \u00f6nerilir.
\n*   cwd<\/code> (varsay\u0131lan: None<\/code>):<\/strong> Komutun \u00e7al\u0131\u015faca\u011f\u0131 dizini belirtir. None<\/code> ise, mevcut \u00e7al\u0131\u015fma dizini kullan\u0131l\u0131r.
\n*   env<\/code> (varsay\u0131lan: None<\/code>):<\/strong> Komut i\u00e7in ortam de\u011fi\u015fkenlerini belirten bir s\u00f6zl\u00fck. None<\/code> ise, ebeveyn s\u00fcrecin ortam de\u011fi\u015fkenleri kullan\u0131l\u0131r.
\n*   stdin<\/code>, stdout<\/code>, stderr<\/code>:<\/strong> Alt s\u00fcrecin giri\u015f, standart \u00e7\u0131kt\u0131 ve standart hata ak\u0131\u015flar\u0131n\u0131n nereye y\u00f6nlendirilece\u011fini kontrol eder. subprocess.DEVNULL<\/code>, ak\u0131\u015flar\u0131 yok saymak i\u00e7in kullan\u0131labilir. Dosya nesneleri de verilebilir. subprocess.PIPE<\/code> ise Popen<\/code> ile \u00e7\u0131kt\u0131 yakalamak i\u00e7in kullan\u0131l\u0131r, call<\/code> ile do\u011frudan \u00e7\u0131kt\u0131 yakalanmaz.
\n*   timeout<\/code>:<\/strong> Komutun tamamlanmas\u0131 i\u00e7in beklenecek maksimum s\u00fcreyi (saniye cinsinden) belirtir. S\u00fcre a\u015f\u0131l\u0131rsa TimeoutExpired<\/code> istisnas\u0131 y\u00fckseltilir.<\/p>\n
subprocess.call() \u00d6rnekleri<\/h3>\n
import subprocess\nimport os\nimport platform\n\n
1. En g\u00fcvenli yol: Komut ve arg\u00fcmanlar\u0131 liste olarak<\/h2>\nprint(\"--- subprocess.call() ile ls -l (liste format\u0131) ---\")\ntry:\n    exit_code_ls_safe = subprocess.call([\"ls\", \"-l\", \"\/tmp\"])\n    print(f\"ls -l \/tmp komutunun \u00e7\u0131k\u0131\u015f kodu: {exit_code_ls_safe}\")\nexcept FileNotFoundError:\n    print(\"Hata: 'ls' komutu bulunamad\u0131.\")\nexcept Exception as e:\n    print(f\"Beklenmedik bir hata olu\u015ftu: {e}\")\n\n
2. shell=True ile komut \u00e7al\u0131\u015ft\u0131rma (daha az g\u00fcvenli, kabuk \u00f6zellikleri i\u00e7in)<\/h2>\n
Sadece g\u00fcvenilir kaynaklardan gelen komutlar i\u00e7in kullan\u0131n!<\/h2>\nprint(\"\\n--- subprocess.call() ile echo ve pipe (shell=True) ---\")\ntry:\n    exit_code_pipe = subprocess.call(\"echo Merhaba Dunya | grep Merhaba\", shell=True)\n    print(f\"echo ... | grep ... komutunun \u00e7\u0131k\u0131\u015f kodu: {exit_code_pipe}\")\nexcept Exception as e:\n    print(f\"Hata olu\u015ftu: {e}\")\n\n
3. cwd (\u00e7al\u0131\u015fma dizini) belirterek komut \u00e7al\u0131\u015ft\u0131rma<\/h2>\n
Ge\u00e7ici bir dizin olu\u015fturup i\u00e7inde komut \u00e7al\u0131\u015ft\u0131ral\u0131m<\/h2>\ntemp_dir = \"temp_test_dir\"\nos.makedirs(temp_dir, exist_ok=True)\nprint(f\"\\n--- subprocess.call() ile cwd kullan\u0131m\u0131 (dizin: {temp_dir}) ---\")\ntry:\n    if platform.system() == \"Windows\":\n        exit_code_cwd = subprocess.call([\"dir\"], cwd=temp_dir, shell=True) # Windows'ta dir tek ba\u015f\u0131na \u00e7al\u0131\u015fmazsa shell=True gerekebilir\n    else:\n        exit_code_cwd = subprocess.call([\"pwd\"], cwd=temp_dir)\n    print(f\"pwd\/dir komutunun \u00e7\u0131k\u0131\u015f kodu (cwd: {temp_dir}): {exit_code_cwd}\")\nfinally:\n    os.rmdir(temp_dir)\n\n
4. stdout\/stderr y\u00f6nlendirme (\u00e7\u0131kt\u0131y\u0131 yok sayma)<\/h2>\nprint(\"\\n--- subprocess.call() ile \u00e7\u0131kt\u0131lar\u0131 DEVNULL'a y\u00f6nlendirme ---\")\ntry:\n    # 'ls -l \/nonexistent' bir hata verir, ancak stderr'i yok sayd\u0131\u011f\u0131m\u0131z i\u00e7in ekranda g\u00f6r\u00fcnmez\n    exit_code_devnull = subprocess.call([\"ls\", \"-l\", \"\/nonexistent\"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)\n    print(f\"Hatal\u0131 komutun (\u00e7\u0131kt\u0131 yok say\u0131ld\u0131) \u00e7\u0131k\u0131\u015f kodu: {exit_code_devnull}\")\nexcept Exception as e:\n    print(f\"Hata olu\u015ftu: {e}\")<\/code><\/pre>\n
subprocess.call()’\u0131n Avantajlar\u0131 ve Dezavantajlar\u0131<\/h3>\n
Avantajlar\u0131:<\/strong>
\n*   G\u00fcvenlik:<\/strong> shell=False<\/code> (varsay\u0131lan) ile kullan\u0131ld\u0131\u011f\u0131nda, komut ve arg\u00fcmanlar\u0131 ayr\u0131 ayr\u0131 i\u015flendi\u011fi i\u00e7in shell injection riskini b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azalt\u0131r.
\n*   Kontrol:<\/strong> cwd<\/code>, env<\/code>, stdin<\/code>, stdout<\/code>, stderr<\/code> gibi parametrelerle komutun y\u00fcr\u00fctme ortam\u0131 \u00fczerinde daha fazla kontrol sa\u011flar.
\n*   Hata Y\u00f6netimi:<\/strong> Komut bulunamad\u0131\u011f\u0131nda veya farkl\u0131 hatalar olu\u015ftu\u011funda Python istisnalar\u0131 (\u00f6rne\u011fin FileNotFoundError<\/code>) yakalanabilir.
\n*   Bloklama Davran\u0131\u015f\u0131:<\/strong> os.system()<\/code> ile ayn\u0131 bloklama davran\u0131\u015f\u0131na sahip oldu\u011fu i\u00e7in basit ge\u00e7i\u015f senaryolar\u0131nda kolayl\u0131k sa\u011flar.<\/p>\n
Dezavantajlar\u0131:<\/strong>
\n*   \u00c7\u0131kt\u0131 Yakalama Yok:<\/strong> os.system()<\/code> gibi, subprocess.call()<\/code> da komutun standart \u00e7\u0131kt\u0131s\u0131n\u0131 do\u011frudan Python de\u011fi\u015fkenine yakalamaz. Bunun i\u00e7in subprocess.run(capture_output=True)<\/code> veya subprocess.check_output()<\/code> tercih edilmelidir.
\n*   Sadece \u00c7\u0131k\u0131\u015f Kodu:<\/strong> Sadece komutun \u00e7\u0131k\u0131\u015f kodunu d\u00f6nd\u00fcr\u00fcr, bu da bazen yeterli olmayabilir.<\/p>\n
\u00d6zetle, subprocess.call()<\/code> os.system()<\/code>‘dan \u00e7ok daha iyi bir alternatiftir ve basit komutlar\u0131 \u00e7al\u0131\u015ft\u0131r\u0131p sadece \u00e7\u0131k\u0131\u015f kodunu kontrol etmek istedi\u011finizde tercih edilebilir. Ancak komutun \u00e7\u0131kt\u0131s\u0131n\u0131 yakalamak istiyorsan\u0131z, subprocess.run()<\/code> veya subprocess.check_output()<\/code> gibi di\u011fer subprocess<\/code> fonksiyonlar\u0131na bakman\u0131z gerekir.<\/p>\n
Pratik \u0130pu\u00e7lar\u0131 ve En \u0130yi Uygulamalar<\/h2>\n
Python ile sistem komutlar\u0131 \u00e7al\u0131\u015ft\u0131r\u0131rken dikkat etmeniz gereken baz\u0131 \u00f6nemli noktalar ve en iyi uygulamalar \u015funlard\u0131r:<\/p>\n
G\u00fcvenlik Her \u015eeyden \u00d6nce Gelir<\/h3>\n
*   shell=False<\/code> Kullan\u0131n:<\/strong> Daima subprocess<\/code> mod\u00fcl\u00fcn\u00fc shell=False<\/code> (varsay\u0131lan) ile kullan\u0131n ve komut ile arg\u00fcmanlar\u0131 bir liste olarak sa\u011flay\u0131n. Bu, shell injection sald\u0131r\u0131lar\u0131n\u0131 \u00f6nlemenin en etkili yoludur.
\n*   Kullan\u0131c\u0131 Girdisine Dikkat:<\/strong> Kullan\u0131c\u0131dan al\u0131nan herhangi bir girdiyi do\u011frudan bir komutun par\u00e7as\u0131 olarak kullanmaktan ka\u00e7\u0131n\u0131n, \u00f6zellikle shell=True<\/code> ile \u00e7al\u0131\u015f\u0131rken. E\u011fer ka\u00e7\u0131n\u0131lmazsa, girdiyi dikkatlice do\u011frulay\u0131n ve temizleyin (sanitize).<\/p>\n
\u00c7\u0131kt\u0131 Yakalama ve \u0130\u015fleme<\/h3>\n
*   subprocess.run()<\/code> veya subprocess.check_output()<\/code> Kullan\u0131n:<\/strong> E\u011fer bir komutun standart \u00e7\u0131kt\u0131s\u0131n\u0131 (stdout) veya hata \u00e7\u0131kt\u0131s\u0131n\u0131 (stderr) Python de\u011fi\u015fkeni olarak almak istiyorsan\u0131z, subprocess.call()<\/code> yerine subprocess.run(capture_output=True, text=True)<\/code> veya subprocess.check_output()<\/code> kullan\u0131n.<\/p>\n
import subprocess\n    try:\n        output = subprocess.check_output([\"ls\", \"-a\"], text=True) # text=True ile \u00e7\u0131kt\u0131y\u0131 string olarak al\u0131r\n        print(\"ls -a \u00e7\u0131kt\u0131s\u0131:\\n\", output)\n    except subprocess.CalledProcessError as e:\n        print(f\"Hata olu\u015ftu: {e.output}\")<\/code><\/pre>\n
Hata Y\u00f6netimi<\/h3>\n
*   D\u00f6n\u00fc\u015f Kodunu Kontrol Edin:<\/strong> os.system()<\/code> ve subprocess.call()<\/code> ile komutun d\u00f6n\u00fc\u015f kodunu kontrol etmek, i\u015flemin ba\u015far\u0131l\u0131 olup olmad\u0131\u011f\u0131n\u0131 anlaman\u0131n ilk ad\u0131m\u0131d\u0131r. S\u0131f\u0131r olmayan bir kod genellikle bir hatay\u0131 g\u00f6sterir.
\n*   try-except<\/code> Bloklar\u0131 Kullan\u0131n:<\/strong> subprocess<\/code> mod\u00fcl\u00fc, komut bulunamad\u0131\u011f\u0131nda (FileNotFoundError<\/code>) veya timeout a\u015f\u0131ld\u0131\u011f\u0131nda (TimeoutExpired<\/code>) gibi durumlarda istisnalar y\u00fckseltebilir. Bu istisnalar\u0131 yakalamak i\u00e7in try-except<\/code> bloklar\u0131 kullan\u0131n. subprocess.check_call()<\/code> ve subprocess.check_output()<\/code> ise s\u0131f\u0131r olmayan d\u00f6n\u00fc\u015f kodlar\u0131nda subprocess.CalledProcessError<\/code> y\u00fckseltir, bu da hata y\u00f6netimini kolayla\u015ft\u0131r\u0131r.<\/p>\n
Bloklama ve Non-Bloklama<\/h3>\n
*   os.system()<\/code> ve subprocess.call()<\/code> gibi fonksiyonlar bloklay\u0131c\u0131d\u0131r<\/strong>, yani \u00e7al\u0131\u015ft\u0131rd\u0131klar\u0131 komut tamamlanana kadar Python beti\u011finin y\u00fcr\u00fct\u00fclmesini durdururlar.
\n*   E\u011fer komutun arka planda \u00e7al\u0131\u015fmas\u0131n\u0131 ve Python beti\u011finizin di\u011fer i\u015flere devam etmesini istiyorsan\u0131z, non-bloklay\u0131c\u0131<\/strong> subprocess.Popen<\/code> s\u0131n\u0131f\u0131n\u0131 kullanman\u0131z gerekir. Bu daha karma\u015f\u0131k bir kullan\u0131m gerektirir ancak e\u015fzamanl\u0131l\u0131k sa\u011flar.<\/p>\n
Platform Farkl\u0131l\u0131klar\u0131<\/h3>\n
*   Komut S\u00f6zdizimi:<\/strong> \u0130\u015fletim sistemleri aras\u0131nda komut s\u00f6zdizimleri farkl\u0131l\u0131k g\u00f6sterebilir (\u00f6rn. Linux’ta ls<\/code>, Windows’ta dir<\/code>). Platforma \u00f6zel komutlar yazarken platform<\/code> mod\u00fcl\u00fcn\u00fc kullanarak i\u015fletim sistemini kontrol edebilirsiniz.
\n*   Kabuk Yorumlamas\u0131:<\/strong> shell=True<\/code> kullan\u0131ld\u0131\u011f\u0131nda, kullan\u0131lan kabuk (bash<\/code>, cmd.exe<\/code>, PowerShell<\/code> vb.) ve onun yorumlama kurallar\u0131 devreye girer. Bu, platformlar aras\u0131 ta\u015f\u0131nabilirli\u011fi zorla\u015ft\u0131rabilir. M\u00fcmk\u00fcnse shell=False<\/code> ile platformdan ba\u011f\u0131ms\u0131z komutlar olu\u015fturmaya \u00e7al\u0131\u015f\u0131n.<\/p>\n
Sonu\u00e7 ve SSS<\/h2>\n
Python’da sistem komutlar\u0131 \u00e7al\u0131\u015ft\u0131rmak, otomasyon ve harici ara\u00e7larla entegrasyon i\u00e7in vazge\u00e7ilmez bir \u00f6zelliktir. Ancak, bu i\u015flemleri g\u00fcvenli ve etkili bir \u015fekilde yapmak b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r.<\/p>\n
os.system()<\/code> fonksiyonu basitli\u011fi nedeniyle cazip g\u00f6r\u00fcnse de, \u00f6zellikle g\u00fcvenlik a\u00e7\u0131klar\u0131 ve \u00e7\u0131kt\u0131 yakalayamama gibi ciddi dezavantajlar\u0131 nedeniyle modern Python geli\u015ftirmelerinde genellikle ka\u00e7\u0131n\u0131lmas\u0131 gereken bir y\u00f6ntemdir.<\/p>\n
subprocess<\/code> mod\u00fcl\u00fc ise Python’da sistem komutlar\u0131n\u0131 \u00e7al\u0131\u015ft\u0131rmak i\u00e7in \u00f6nerilen, modern ve kapsaml\u0131 bir \u00e7\u00f6z\u00fcmd\u00fcr. Bu mod\u00fcl, g\u00fcvenlik, esneklik ve kontrol a\u00e7\u0131s\u0131ndan \u00e7ok daha \u00fcst\u00fcnd\u00fcr. subprocess.call()<\/code> fonksiyonu, os.system()<\/code>‘a g\u00fcvenli bir alternatif olarak, komutlar\u0131 \u00e7al\u0131\u015ft\u0131rmak ve sadece \u00e7\u0131k\u0131\u015f kodunu kontrol etmek istedi\u011finizde idealdir. Ancak komut \u00e7\u0131kt\u0131s\u0131n\u0131 yakalamak veya daha geli\u015fmi\u015f s\u00fcre\u00e7 y\u00f6netimi yapmak istedi\u011finizde, subprocess.run()<\/code> veya subprocess.Popen<\/code> gibi di\u011fer subprocess<\/code> fonksiyonlar\u0131n\u0131 kullanmal\u0131s\u0131n\u0131z.<\/p>\n
En iyi uygulama olarak, her zaman subprocess<\/code> mod\u00fcl\u00fcn\u00fc shell=False<\/code> ve komut ile arg\u00fcmanlar\u0131 liste format\u0131nda kullanarak g\u00fcvenlikten \u00f6d\u00fcn vermeyin.<\/p>\n
S\u0131k\u00e7a Sorulan Sorular (SSS)<\/h3>\n
S1: os.system()<\/code> yerine neden subprocess<\/code> kullanmal\u0131y\u0131m?<\/strong>
\nC: subprocess<\/code> mod\u00fcl\u00fc, os.system()<\/code>‘a g\u00f6re \u00e7ok daha g\u00fcvenli (shell injection riskini azalt\u0131r), daha esnek (\u00e7al\u0131\u015fma dizini, ortam de\u011fi\u015fkenleri kontrol\u00fc) ve daha g\u00fc\u00e7l\u00fc (\u00e7\u0131kt\u0131 yakalama, non-bloklama se\u00e7enekleri, daha iyi hata y\u00f6netimi) oldu\u011fu i\u00e7in tercih edilmelidir.<\/p>\n
S2: Bir komutun \u00e7\u0131kt\u0131s\u0131n\u0131 nas\u0131l al\u0131r\u0131m? subprocess.call()<\/code> bunu yapabilir mi?<\/strong>
\nC: subprocess.call()<\/code> komutun \u00e7\u0131kt\u0131s\u0131n\u0131 do\u011frudan bir Python de\u011fi\u015fkenine yakalamaz. Bunun yerine, \u00e7\u0131kt\u0131y\u0131 yakalamak i\u00e7in subprocess.run(capture_output=True, text=True)<\/code> veya subprocess.check_output(text=True)<\/code> kullanman\u0131z gerekir.<\/p>\n
S3: Komut \u00e7al\u0131\u015fmazsa veya hata verirse ne yapmal\u0131y\u0131m?<\/strong>
\nC: Her zaman komutun d\u00f6n\u00fc\u015f kodunu kontrol edin. os.system()<\/code> ve subprocess.call()<\/code> s\u0131f\u0131r olmayan bir d\u00f6n\u00fc\u015f kodu d\u00f6nd\u00fcr\u00fcr. subprocess.check_call()<\/code> ve subprocess.check_output()<\/code> ise hata durumunda subprocess.CalledProcessError<\/code> istisnas\u0131 y\u00fckseltir. Bu istisnalar\u0131 try-except<\/code> bloklar\u0131 ile yakalayarak hata durumlar\u0131n\u0131 y\u00f6netebilirsiniz.<\/p>\n
S4: shell=True<\/code> ne zaman kullanmal\u0131y\u0131m? G\u00fcvenli mi?<\/strong>
\nC: shell=True<\/code>, komutunuzda kabuk \u00f6zellikleri (boru hatlar\u0131 |<\/code>, y\u00f6nlendirmeler ><\/code>, joker karakterler *<\/code>, vb.) kullanman\u0131z gerekti\u011finde faydal\u0131 olabilir. Ancak, bu parametre g\u00fcvenlik risklerini art\u0131r\u0131r, \u00f6zellikle kullan\u0131c\u0131dan al\u0131nan girdileri komutun bir par\u00e7as\u0131 olarak kullan\u0131yorsan\u0131z. M\u00fcmk\u00fcn oldu\u011funca shell=False<\/code> kullan\u0131n. E\u011fer shell=True<\/code> kullanmak zorundaysan\u0131z, komut stringini dikkatlice olu\u015fturun ve asla g\u00fcvenilmeyen kullan\u0131c\u0131 girdisini do\u011frudan i\u00e7ine katmay\u0131n.<\/p>\n
S5: Python beti\u011fim komutun tamamlanmas\u0131n\u0131 beklemeden devam edebilir mi?<\/strong>
\nC: Evet. os.system()<\/code>, subprocess.call()<\/code>, subprocess.run()<\/code>, subprocess.check_call()<\/code> ve subprocess.check_output()<\/code> bloklay\u0131c\u0131d\u0131r. Python beti\u011finizin komutun tamamlanmas\u0131n\u0131 beklemeden devam etmesini istiyorsan\u0131z, subprocess.Popen<\/code> s\u0131n\u0131f\u0131n\u0131 kullanmal\u0131s\u0131n\u0131z. Bu, non-bloklay\u0131c\u0131 bir yakla\u015f\u0131m sunar ve daha karma\u015f\u0131k s\u00fcre\u00e7 y\u00f6netimi i\u00e7in uygundur.<\/p>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak\nPython, otomasyon, sistem y\u00f6netimi ve di\u011fer uygulamalar i\u00e7in g\u00fc\u00e7l\u00fc bir dil olup, hari","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1403],"tags":[],"class_list":{"0":"post-33825","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-python","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nGiri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak - Kodlar\u0131n Gizemli D\u00fcnyas\u0131<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak\" \/>\n<meta property=\"og:description\" content=\"Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak Python, otomasyon, sistem y\u00f6netimi ve di\u011fer uygulamalar i\u00e7in g\u00fc\u00e7l\u00fc bir dil olup, hari\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-11-07T12:41:27+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"15 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak\",\"datePublished\":\"2025-11-07T12:41:27+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/\"},\"wordCount\":2227,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"articleSection\":[\"Python\"],\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/giris-python-ile-sistem-komutlarini-calistirmak\/\",\"name\":\"Giri\u015f: Python ile Sistem Komutlar\u0131n\u0131 \u00c7al\u0131\u015ft\u0131rmak - 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