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perror (3)
  • perror (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • >> perror (3) ( Solaris man: Библиотечные вызовы )
  • perror (3) ( FreeBSD man: Библиотечные вызовы )
  • perror (3) ( Русские man: Библиотечные вызовы )
  • perror (3) ( Linux man: Библиотечные вызовы )
  • perror (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    perror, errno - print system error messages
     
    

    SYNOPSIS

    #include <stdio.h>
    
    void perror(const char *s)
    

    #include <errno.h>
    
    int errno;
    

     

    DESCRIPTION

    The perror() function produces a message on the standard error output (file descriptor 2) describing the last error encountered during a call to a system or library function. The argument string s is printed, followed by a colon and a blank, followed by the message and a NEWLINE character. If s is a null pointer or points to a null string, the colon is not printed. The argument string should include the name of the program that incurred the error. The error number is taken from the external variable errno, which is set when errors occur but not cleared when non-erroneous calls are made. See Intro(2).

    In the case of multithreaded applications, the -mt option must be specified on the command line at compilation time (see threads(5)). When the -mt option is specified, errno becomes a macro that enables each thread to have its own errno. This errno macro can be used on either side of the assignment as though it were a variable.  

    USAGE

    Messages printed from this function are in the native language specified by the LC_MESSAGES locale category. See setlocale(3C).  

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Interface StabilityStandard

    MT-Level

     

    SEE ALSO

    Intro(2), fmtmsg(3C), gettext(3C), setlocale(3C), strerror(3C), attributes(5), standards(5), threads(5)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    USAGE
    ATTRIBUTES
    SEE ALSO


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