explain_pipe(3)

💖 explain_pipe(3) — Library Functions Manual 💖

okay bestie, sit DOWN, because we're about to talk about explain_pipe(3), a whole entire page from the library functions manual that's gonna make your pipe(2) errors make sense. no cap.

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✨ NAME ✨

explain_pipe — explain pipe(2) errors 💅

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🌸 SYNOPSIS 🌸

#include <libexplain/pipe.h>
const char *explain_pipe(int *pipefd);
const char *explain_errno_pipe(int errnum, int *pipefd);
void explain_message_pipe(char *message, int message_size, int *pipefd);
void explain_message_errno_pipe(char *message, int message_size, int
errnum, int *pipefd);

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🎀 DESCRIPTION 🎀

so basically, these functions are your little besties you call when the pipe(2) system call comes back with an error and you're like "girl what happened 😭". They hand you explanations. That's the whole vibe.

🦋 explain_pipe

const char *explain_pipe(int *pipefd);

The explain_pipe function is the one you call to get an explanation of an error returned by the pipe(2) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better and point at the actual underlying cause in more detail. it's giving overachiever, and we love that for it.

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

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

if (pipe(pipefd) < 0)
{
    fprintf(stderr, "%s\n", explain_pipe(pipefd));
    exit(EXIT_FAILURE);
}

The above code example is available pre-packaged as the explain_pipe_or_die(3) function. iconic, honestly.

• pipefd — The original pipefd, exactly as passed to the pipe(2) system call. no editing, no remixing, just the raw original.
• 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. so like… be careful in a multithreaded situation, bestie 💀

🧚 explain_errno_pipe

const char *explain_errno_pipe(int errnum, int *pipefd);

The explain_errno_pipe function is used to obtain an explanation of an error returned by the pipe(2) system call. The least the message will contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail. yes, again, she's thorough. main character energy.

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

if (pipe(pipefd) < 0)
{
    int err = errno;
    fprintf(stderr, "%s\n", explain_errno_pipe(err, pipefd));
    exit(EXIT_FAILURE);
}

The above code example is available pre-packaged as the explain_pipe_or_die(3) function.

• 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. so like, grab that errno early, she's flighty.
• pipefd — The original pipefd, exactly as passed to the pipe(2) 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.

🌈 explain_message_pipe

void explain_message_pipe(char *message, int message_size, int *pipefd);

The explain_message_pipe function may be used to obtain an explanation of an error returned by the pipe(2) 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. periodt.

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

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

if (pipe(pipefd) < 0)
{
    char message[3000];
    explain_message_pipe(message, sizeof(message), pipefd);
    fprintf(stderr, "%s\n", message);
    exit(EXIT_FAILURE);
}

The above code example is available pre-packaged as the explain_pipe_or_die(3) function.

• message — The location in which to store the returned message. If a suitable message return buffer is supplied, this function is thread safe. yes bestie, she said thread safe 💅
• message_size — The size in bytes of the location in which to store the returned message.
• pipefd — The original pipefd, exactly as passed to the pipe(2) system call.

💜 explain_message_errno_pipe

void explain_message_errno_pipe(char *message, int message_size, int
errnum, int *pipefd);

The explain_message_errno_pipe function may be used to obtain an explanation of an error returned by the pipe(2) system call. The least the message will contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail. the way she just knows things 🫶

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

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

The above code example is available pre-packaged as the explain_pipe_or_die(3) function.

• 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.
• pipefd — The original pipefd, exactly as passed to the pipe(2) system call.

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👑 SEE ALSO 👑

• pipe(2) — create pipe
• explain_pipe_or_die(3) — create pipe and report errors

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🍓 COPYRIGHT 🍓

• libexplain version 1.4
• Copyright (C) 2009 Peter Miller

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okay and that's the whole page, bestie 💖 go forth and never wonder what your pipe errors mean ever again. libexplain version 1.4, copyright 2009 Peter Miller, from the explain_pipe(3) era of the manual pages. slay, ate, no crumbs left, periodt ✨🎀