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Off-by-one errors are common in using the C library because it is not consistent with respect to whether one needs to subtract 1 byte – functions like fgets() and strncpy will never write past the length given them (fgets() subtracts 1 itself, and only retrieves (length − 1) bytes), whereas others, like strncat will write past the length given them.
Too many open files ENOTTY: 25: Inappropriate ioctl for device ETXTBSY: 26: Text file busy EFBIG: 27: File too large ENOSPC: 28: No space left on device ESPIPE: 29: Illegal seek EROFS: 30: Read-only file system EMLINK: 31: Too many links EPIPE: 32: Broken pipe EDOM: 33: Numerical argument out of domain ERANGE: 34: Numerical result out of range ...
They provide an elegant way of handling errors, without resorting to exception handling; when a function that may fail returns a result type, the programmer is forced to consider success or failure paths, before getting access to the expected result; this eliminates the possibility of an erroneous programmer assumption.
Integer overflow can be demonstrated through an odometer overflowing, a mechanical version of the phenomenon. All digits are set to the maximum 9 and the next increment of the white digit causes a cascade of carry-over additions setting all digits to 0, but there is no higher digit (1,000,000s digit) to change to a 1, so the counter resets to zero.
It is easier to alter the value of the number, as it is not duplicated. Changing the value of a magic number is error-prone, because the same value is often used several times in different places within a program. [6] Also, when two semantically distinct variables or numbers have the same value they may be accidentally both edited together. [6]
C does not provide direct support to exception handling: it is the programmer's responsibility to prevent errors in the first place and test return values from the functions.
The file contains no relocation or linkage information. These files can be loaded into read/write memory, or stored in read-only memory. For example, the Motorola 6800 MIKBUG monitor contains a routine to read an absolute object file (SREC Format) from paper tape. [5] DOS COM files are a more recent example of absolute object files. [6]
The request is larger than the server is willing or able to process. Previously called "Request Entity Too Large". [16]: §10.4.14 414 URI Too Long The URI provided was too long for the server to process. Often the result of too much data being encoded as a query-string of a GET request, in which case it should be converted to a POST request.