Page Information

Title:	POS01-C. Check for the existence of links when dealing with files
Author:	Robert Seacord	Mar 01, 2007
Last Changed by:	Francesco Mariani	Aug 31, 2025
Tiny Link: (useful for email)	https://wiki.sei.cmu.edu/confluence/x/9NYxBQ
Export As:	Word · PDF

SEI CERT C Coding Standard (2)     Page: POS38-C. Beware of race conditions when using fork and file descriptors     Page: FIO32-C. Do not perform operations on devices that are only appropriate for files

Android (1)     Page: Unknown Applicability (C Rules/Recomendations)

Parent Page     Page: Rec. 50. POSIX (POS)

• rose-false-positive
• cwe-59
• cwe-367
• android-unknown
• opening-files
• recommendation
• pos
• cwe-362

Time	Editor
Aug 31, 2025 05:21	Francesco Mariani	View Changes
May 20, 2025 09:32	Will Snavely	View Changes
REM Cost Reform
Nov 16, 2017 14:41	Will Snavely	View Changes
Jan 05, 2017 14:22	Will Snavely	View Changes
Oct 26, 2015 14:10	Sandy Shrum

External Links (10)
    www.opengroup.org/onlinepubs/009695399/functions/open.html
    msdn.microsoft.com/en-us/library/aa363860(VS.85).aspx
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    cwe.mitre.org/data/definitions/59.html
    https://www.kb.cert.org/vulnotes/bymetric?searchview&query=…
    cwe.mitre.org/data/definitions/367.html
    cwe.mitre.org/data/definitions/362.html
    https://www.securecoding.cert.org/confluence/display/seccod…
    cwe.mitre.org/
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…

SEI CERT C Coding Standard (8)     Page: AA. Bibliography     Page: POS35-C. Avoid race conditions while checking for the existence of a symbolic link     Home page: SEI CERT C Coding Standard     Page: FIO03-C. Do not make assumptions about fopen() and file creation     Page: FIO05-C. Identify files using multiple file attributes     Page: Rose     Page: Security Reviewer - Static Reviewer     Page: Security Reviewer - Static Reviewer_V