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Man Pages
explain_fgets_or_die(3) FreeBSD Library Functions Manual explain_fgets_or_die(3)

explain_fgets_or_die - input of strings and report errors

#include <libexplain/fgets.h>
char *explain_fgets_or_die(char *data, int data_size, FILE *fp);

The explain_fgets_or_die function is used to call the fgets(3) system call. On failure an explanation will be printed to stderr, obtained from explain_fgets(3), and then the process terminates by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion similar to the following example:
explain_fgets_or_die(data, data_size, fp);
data
The data, exactly as to be passed to the fgets(3) system call.
data_size
The data_size, exactly as to be passed to the fgets(3) system call.
fp
The fp, exactly as to be passed to the fgets(3) system call.
Returns:
This function only returns on success; data when a line is read, or NULL on end‐of‐file. On failure, prints an explanation and exits.

fgets(3)
input of strings
explain_fgets(3)
explain fgets(3) errors
exit(2)
terminate the calling process

libexplain version 1.3
 
Copyright (C) 2008 Peter Miller

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