explain_mkostemp(3)

🌸 explain_mkostemp — bestie edition 🌸

okay so this is explain_mkostemp(3), a Library Functions Manual page, and it's literally all about turning those cryptic mkostemp(3) errors into actual sentences you can read. no cap, it's giving "translator for your syscalls". 💖

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✨ NAME ✨

explain_mkostemp — explain mkostemp(3) errors 🫶

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✨ SYNOPSIS ✨

#include <libexplain/mkostemp.h>
const char *explain_mkostemp(char *templat, int flags);
const char *explain_errno_mkostemp(int errnum, char *templat, int
flags);
void explain_message_mkostemp(char *message, int message_size, char
*templat, int flags);
void explain_message_errno_mkostemp(char *message, int message_size, int
errnum, char *templat, int flags);

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✨ DESCRIPTION ✨

so like, these functions are your little helpers for getting explanations of errors returned by the mkostemp(3) system call. they're the friend who reads the error message and goes "okay bestie here's what actually happened". 💅

🌈 explain_mkostemp

const char *explain_mkostemp(char *templat, int flags);

the explain_mkostemp function gets you an explanation of an error returned by the mkostemp(3) system call. the least the message will contain is the value of strerror(errno), but usually it does so much better and tells you the underlying cause in way more detail. it's giving overachiever and we love that. ✨

the errno global variable is the one used to obtain the error value to be decoded.

• templat — the original template, exactly as passed to the mkostemp(3) system call.
• flags — the original flags, exactly as passed to the mkostemp(3) system call.

Returns: the message explaining the error. this message buffer is shared by all libexplain functions that don't supply a buffer in their argument list. it will be overwritten by the next call to any libexplain function that shares this buffer, including other threads. 😭

Note: this function is not thread safe, because it shares a return buffer across all threads, and many other functions in this library. periodt. 💀

Example: this function is intended to be used in a fashion similar to the following example:

int result = mkostemp(templat, flags);
if (result < 0)
{
    fprintf(stderr, "%s\n", explain_mkostemp(templat, flags));
    exit(EXIT_FAILURE);
}

the above code example is available pre‐packaged as the explain_mkostemp_or_die(3) function. iconic. 👑

🌈 explain_errno_mkostemp

const char *explain_errno_mkostemp(int errnum, char *templat, int
flags);

the explain_errno_mkostemp function gets you an explanation of an error returned by the mkostemp(3) system call. the least the message will contain is the value of strerror(errno), but usually it does much better and indicates the underlying cause in more detail. fr fr. 💜

• errnum — the error value to be decoded, usually obtained from the errno global variable just before this function is called. this is necessary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno. 🚨
• templat — the original template, exactly as passed to the mkostemp(3) system call.
• flags — the original flags, exactly as passed to the mkostemp(3) system call.

Returns: the message explaining the error. this message buffer is shared by all libexplain functions that don't supply a buffer in their argument list. it will be overwritten by the next call to any libexplain function that shares this buffer, including other threads. 🙈

Note: this function is not thread safe, because it shares a return buffer across all threads, and many other functions in this library.

Example: this function is intended to be used in a fashion similar to the following example:

int result = mkostemp(templat, flags);
if (result < 0)
{
    int err = errno;
    fprintf(stderr, "%s\n", explain_errno_mkostemp(err, templat,
    flags));
    exit(EXIT_FAILURE);
}

the above code example is available pre‐packaged as the explain_mkostemp_or_die(3) function. slay. 🎀

🌈 explain_message_mkostemp

void explain_message_mkostemp(char *message, int message_size, char
*templat, int flags);

the explain_message_mkostemp function gets you an explanation of an error returned by the mkostemp(3) system call. the least the message will contain is the value of strerror(errno), but usually it does much better and indicates the underlying cause in more detail. 🌸

the errno global variable is the one used to obtain the error value to be decoded.

• message — the location in which to store the returned message. if a suitable message return buffer is supplied, this function is thread safe. 🦋
• message_size — the size in bytes of the location in which to store the returned message.
• templat — the original template, exactly as passed to the mkostemp(3) system call.
• flags — the original flags, exactly as passed to the mkostemp(3) system call.

Example: this function is intended to be used in a fashion similar to the following example:

int result = mkostemp(templat, flags);
if (result < 0)
{
    char message[3000];
    explain_message_mkostemp(message, sizeof(message), templat,
    flags);
    fprintf(stderr, "%s\n", message);
    exit(EXIT_FAILURE);
}

the above code example is available pre‐packaged as the explain_mkostemp_or_die(3) function. no cap. 🔥

🌈 explain_message_errno_mkostemp

void explain_message_errno_mkostemp(char *message, int message_size, int
errnum, char *templat, int flags);

the explain_message_errno_mkostemp function gets you an explanation of an error returned by the mkostemp(3) system call. the least the message will contain is the value of strerror(errno), but usually it does much better and indicates the underlying cause in more detail. ✨

• message — the location in which to store the returned message. if a suitable message return buffer is supplied, this function is thread safe. 🫶
• message_size — the size in bytes of the location in which to store the returned message.
• errnum — the error value to be decoded, usually obtained from the errno global variable just before this function is called. this is necessary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno. 😭
• templat — the original template, exactly as passed to the mkostemp(3) system call.
• flags — the original flags, exactly as passed to the mkostemp(3) system call.

Example: this function is intended to be used in a fashion similar to the following example:

int result = mkostemp(templat, flags);
if (result < 0)
{
    int err = errno;
    char message[3000];
    explain_message_errno_mkostemp(message, sizeof(message), err,
    templat, flags);
    fprintf(stderr, "%s\n", message);
    exit(EXIT_FAILURE);
}

the above code example is available pre‐packaged as the explain_mkostemp_or_die(3) function. ate and left no crumbs. 💅

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✨ SEE ALSO ✨

• mkostemp(3) — create a unique temporary file
• explain_mkostemp_or_die(3) — create a unique temporary file and report errors

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✨ COPYRIGHT ✨

libexplain version 1.4 Copyright (C) 2009 Peter Miller

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okay that's the whole thing bestie, go forth and decode those errors 💖 this was explain_mkostemp(3) from the Library Functions Manual, brought to you by libexplain version 1.4 and the 2009 copyright era of Peter Miller — mwah, stan. 🌈👑🍓