FreeBSD Manual Pages
explain_mkdir(3) Library Functions Manual explain_mkdir(3) NAME explain_mkdir - explain mkdir(2) errors SYNOPSIS #include <libexplain/mkdir.h> const char *explain_mkdir(const char *pathname); const char *explain_errno_mkdir(int errnum, const char *pathname); void explain_message_mkdir(char *message, int message_size, const char *pathname); void explain_message_errno_mkdir(char *message, int message_size, int errnum, const char *pathname); DESCRIPTION These functions may be used to obtain explanations for errors returned by the mkdir(2) system call. explain_mkdir const char *explain_mkdir(const char *pathname); The explain_mkdir function is used to obtain an explanation of an error returned by the mkdir(2) system call. The least the message will con- tain is the value of strerror(errno), but usually it will do much bet- ter, and indicate the underlying cause in more detail. 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 fol- lowing example: if (mkdir(pathname) < 0) { fprintf(stderr, "%s\n", explain_mkdir(pathname)); exit(EXIT_FAILURE); } pathname The original pathname, exactly as passed to the mkdir(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, in- cluding 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_errno_mkdir const char *explain_errno_mkdir(int errnum, const char *pathname); The explain_errno_mkdir function is used to obtain an explanation of an error returned by the mkdir(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. This function is intended to be used in a fashion similar to the fol- lowing example: if (mkdir(pathname) < 0) { int err = errno; fprintf(stderr, "%s\n", explain_errno_mkdir(err, pathname)); exit(EXIT_FAILURE); } 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. pathname The original pathname, exactly as passed to the mkdir(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, in- cluding 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_mkdir void explain_message_mkdir(char *message, int message_size, const char *pathname); The explain_message_mkdir function may be used to obtain an explana- tion of an error returned by the mkdir(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. 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 fol- lowing example: if (mkdir(pathname) < 0) { char message[3000]; explain_message_mkdir(message, sizeof(message), pathname); fprintf(stderr, "%s\n", message); exit(EXIT_FAILURE); } 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 re- turned message. pathname The original pathname, exactly as passed to the mkdir(2) system call. explain_message_errno_mkdir void explain_message_errno_mkdir(char *message, int message_size, int errnum, const char *pathname); The explain_message_errno_mkdir function may be used to obtain an ex- planation of an error returned by the mkdir(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 de- tail. This function is intended to be used in a fashion similar to the fol- lowing example: if (mkdir(pathname) < 0) { int err = errno; char message[3000]; explain_message_errno_mkdir(message, sizeof(message), err, pathname); fprintf(stderr, "%s\n", message); exit(EXIT_FAILURE); } 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 re- turned 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. pathname The original pathname, exactly as passed to the mkdir(2) system call. SEE ALSO mkdir(2) create a directory explain_mkdir_or_die(3) create a directory and report errors COPYRIGHT libexplain version 1.3 Copyright (C) 2008 Peter Miller explain_mkdir(3)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | COPYRIGHT
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=explain_mkdir&sektion=3&manpath=FreeBSD+Ports+15.0.quarterly>