Answer by Sadeq Dousti for Checking for success of fwrite in C, perror
You can also use explain_fwrite(), explain_errno_fwrite, ... from libexplain.The man page explains:The explain_fwrite function is used to obtain an explanation of an error returned by the fwrite(3)...
View ArticleAnswer by just somebody for Checking for success of fwrite in C, perror
STRERROR(3) FreeBSD Library Functions Manual STRERROR(3)NAME perror, strerror, strerror_r, sys_errlist, sys_nerr — system error mes‐ sagesLIBRARY Standard C Library (libc, -lc)SYNOPSIS #include...
View ArticleAnswer by mctylr for Checking for success of fwrite in C, perror
From the Linux man page of fwritefread() and fwrite() return the number of items successfully read or written (i.e., not the number of characters). If an error occurs, or the end-of-file is reached,...
View ArticleAnswer by Tronic for Checking for success of fwrite in C, perror
Your code might not check for errors properly. Useif (fwrite(ptr, size, num, f) != num) { // An error occurred, handle it somehow}
View ArticleAnswer by user257111 for Checking for success of fwrite in C, perror
In short, not quite. fwrite returns the number of elements successfully written; you need to check this against the number of elements you intended to write i.e. those you passed in argument to fwrite....
View ArticleChecking for success of fwrite in C, perror
With fwrite returning the number of successful elements written to the file, by saying:if (!(fwrite(...))) { fprintf(stderr, "Failure"); //perror(???) I sometimes see code that says perror here and I...
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