explain_mkstemp(3)

🎀 explain_mkstemp — explain mkstemp(3) errors 🎀

okay bestie, welcome to the libexplain corner of the manual, this is explain_mkstemp(3) from the Library Functions Manual and she is here to make your error messages actually make sense 💅

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✨ NAME ✨

explain_mkstemp — explain mkstemp(3) errors

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🌸 SYNOPSIS 🌸

#include <libexplain/mkstemp.h>
const char *explain_mkstemp(char *templat);
const char *explain_errno_mkstemp(int errnum, char *templat);
void explain_message_mkstemp(char *message, int message_size, char *templat);
void explain_message_errno_mkstemp(char *message, int message_size, int errnum, char *templat);

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💜 DESCRIPTION 💜

so these functions are your little translators 🫶 — you use them to obtain explanations for errors that come back from the mkstemp(3) system call. no more staring at a cryptic number like 😭, you get actual words.

🦋 explain_mkstemp

const char *explain_mkstemp(char *templat);

The explain_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.

The errno global variable will be used to obtain the error value to be decoded.

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

Returns:

The message explaining the error. This message buffer is shared by all libexplain functions which do not supply a buffer in their argument list. This will be overwritten by the next call to any libexplain function which 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 = mkstemp(templat);
if (result < 0)
{
    fprintf(stderr, "%s\n", explain_mkstemp(templat));
    exit(EXIT_FAILURE);
}

The above code example is available pre‐packaged as the explain_mkstemp_or_die(3) function. iconic, honestly ✨

🌈 explain_errno_mkstemp

const char *explain_errno_mkstemp(int errnum, char *templat);

The explain_errno_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.

• 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 mkstemp(3) system call.

Returns:

The message explaining the error. This message buffer is shared by all libexplain functions which do not supply a buffer in their argument list. This will be overwritten by the next call to any libexplain function which 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 = mkstemp(templat);
if (result < 0)
{
    int err = errno;
    fprintf(stderr, "%s\n", explain_errno_mkstemp(err, templat));
    exit(EXIT_FAILURE);
}

The above code example is available pre‐packaged as the explain_mkstemp_or_die(3) function.

🧚 explain_message_mkstemp

void explain_message_mkstemp(char *message, int message_size, char *templat);

The explain_message_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.

The errno global variable will be 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 mkstemp(3) system call.

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

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

The above code example is available pre‐packaged as the explain_mkstemp_or_die(3) function.

💖 explain_message_errno_mkstemp

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

The explain_message_errno_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate 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 mkstemp(3) system call.

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

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

The above code example is available pre‐packaged as the explain_mkstemp_or_die(3) function.

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👀 SEE ALSO 👀

• mkstemp(3) — create a unique temporary file
• explain_mkstemp_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 page bestie, you ate that 🫶 libexplain version 1.4, Copyright (C) 2009 Peter Miller — mwah, go forth and decode your errnos 💅✨