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An existence check before reading a file can catch and/or prevent a fatal error, for instance. For that reason, most programming language libraries contain a means of checking whether a file exists. An existence check can sometimes involve a " brute force " approach of checking all records for a given identifier, as in this Microsoft Excel ...
File URLs are rarely used in Web pages on the public Internet, since they imply that a file exists on the designated host. The host specifier can be used to retrieve a file from an external source, although no specific file-retrieval protocol is specified; and using it should result in a message that informs the user that no mechanism to access ...
Here, access is intended to check whether the real user who executed the setuid program would normally be allowed to write the file (i.e., access checks the real userid rather than effective userid). This race condition is vulnerable to an attack:
File exists EXDEV: 18: Invalid cross-device link ENODEV: 19: No such device ENOTDIR: 20: Not a directory EISDIR: 21: Is a directory EINVAL: 22: Invalid argument ENFILE: 23: Too many open files in system EMFILE: 24: Too many open files ENOTTY: 25: Inappropriate ioctl for device ETXTBSY: 26: Text file busy EFBIG: 27: File too large ENOSPC: 28: No ...
It is also possible, but not as efficient, to use adjacency lists to test whether an edge exists or does not exist between two specified vertices. In an adjacency list in which the neighbors of each vertex are unsorted, testing for the existence of an edge may be performed in time proportional to the minimum degree of the two given vertices, by ...
NuSMV first tries to read and execute commands from an initialization file if such file exists and is readable unless -s was passed on the command line. File master.nusmvrc is looked for in the directories defined in environment variable NUSMV_LIBRARY_PATH or in the default library path if no such variable is defined.
Groceries are eating up more than just your time — about $270 per week for the average American household. That’s $1,080 a month or a gut-punching $14,051 a year. Yikes. But before you start ...
The JS++ programming language is able to analyze if an array index or map key is out-of-bounds at compile time using existent types, which is a nominal type describing whether the index or key is within-bounds or out-of-bounds and guides code generation. Existent types have been shown to add only 1ms overhead to compile times.