strerror.c File Reference

#include "c.h"

Include dependency graph for strerror.c:

Go to the source code of this file.

Functions
static char *	gnuish_strerror_r (int errnum, char *buf, size_t buflen)
static char *	get_errno_symbol (int errnum)
char *	pg_strerror (int errnum)
char *	pg_strerror_r (int errnum, char *buf, size_t buflen)

Function Documentation

get_errno_symbol()

static char * get_errno_symbol ( int  errnum )

static

Definition at line 113 of file strerror.c.

{
    switch (errnum)
    {
        case E2BIG:
            return "E2BIG";
        case EACCES:
            return "EACCES";
        case EADDRINUSE:
            return "EADDRINUSE";
        case EADDRNOTAVAIL:
            return "EADDRNOTAVAIL";
        case EAFNOSUPPORT:
            return "EAFNOSUPPORT";
#ifdef EAGAIN
        case EAGAIN:
            return "EAGAIN";
#endif
#ifdef EALREADY
        case EALREADY:
            return "EALREADY";
#endif
        case EBADF:
            return "EBADF";
#ifdef EBADMSG
        case EBADMSG:
            return "EBADMSG";
#endif
        case EBUSY:
            return "EBUSY";
        case ECHILD:
            return "ECHILD";
        case ECONNABORTED:
            return "ECONNABORTED";
        case ECONNREFUSED:
            return "ECONNREFUSED";
        case ECONNRESET:
            return "ECONNRESET";
        case EDEADLK:
            return "EDEADLK";
        case EDOM:
            return "EDOM";
        case EEXIST:
            return "EEXIST";
        case EFAULT:
            return "EFAULT";
        case EFBIG:
            return "EFBIG";
        case EHOSTDOWN:
            return "EHOSTDOWN";
        case EHOSTUNREACH:
            return "EHOSTUNREACH";
        case EIDRM:
            return "EIDRM";
        case EINPROGRESS:
            return "EINPROGRESS";
        case EINTR:
            return "EINTR";
        case EINVAL:
            return "EINVAL";
        case EIO:
            return "EIO";
        case EISCONN:
            return "EISCONN";
        case EISDIR:
            return "EISDIR";
#ifdef ELOOP
        case ELOOP:
            return "ELOOP";
#endif
        case EMFILE:
            return "EMFILE";
        case EMLINK:
            return "EMLINK";
        case EMSGSIZE:
            return "EMSGSIZE";
        case ENAMETOOLONG:
            return "ENAMETOOLONG";
        case ENETDOWN:
            return "ENETDOWN";
        case ENETRESET:
            return "ENETRESET";
        case ENETUNREACH:
            return "ENETUNREACH";
        case ENFILE:
            return "ENFILE";
        case ENOBUFS:
            return "ENOBUFS";
        case ENODEV:
            return "ENODEV";
        case ENOENT:
            return "ENOENT";
        case ENOEXEC:
            return "ENOEXEC";
        case ENOMEM:
            return "ENOMEM";
        case ENOSPC:
            return "ENOSPC";
        case ENOSYS:
            return "ENOSYS";
        case ENOTCONN:
            return "ENOTCONN";
        case ENOTDIR:
            return "ENOTDIR";
        case ENOTEMPTY:
            return "ENOTEMPTY";
        case ENOTSOCK:
            return "ENOTSOCK";
#ifdef ENOTSUP
        case ENOTSUP:
            return "ENOTSUP";
#endif
        case ENOTTY:
            return "ENOTTY";
        case ENXIO:
            return "ENXIO";
#if defined(EOPNOTSUPP) && (!defined(ENOTSUP) || (EOPNOTSUPP != ENOTSUP))
        case EOPNOTSUPP:
            return "EOPNOTSUPP";
#endif
#ifdef EOVERFLOW
        case EOVERFLOW:
            return "EOVERFLOW";
#endif
        case EPERM:
            return "EPERM";
        case EPIPE:
            return "EPIPE";
        case EPROTONOSUPPORT:
            return "EPROTONOSUPPORT";
        case ERANGE:
            return "ERANGE";
#ifdef EROFS
        case EROFS:
            return "EROFS";
#endif
        case ESRCH:
            return "ESRCH";
        case ETIMEDOUT:
            return "ETIMEDOUT";
#ifdef ETXTBSY
        case ETXTBSY:
            return "ETXTBSY";
#endif
#if defined(EWOULDBLOCK) && (!defined(EAGAIN) || (EWOULDBLOCK != EAGAIN))
        case EWOULDBLOCK:
            return "EWOULDBLOCK";
#endif
        case EXDEV:
            return "EXDEV";
    }
 
    return NULL;
}

References EADDRINUSE, EADDRNOTAVAIL, EAFNOSUPPORT, EAGAIN, ECONNABORTED, ECONNREFUSED, ECONNRESET, EHOSTDOWN, EHOSTUNREACH, EIDRM, EINPROGRESS, EINTR, EISCONN, EMSGSIZE, ENETDOWN, ENETRESET, ENETUNREACH, ENOBUFS, ENOTCONN, ENOTSOCK, ENOTSUP, EOPNOTSUPP, EOVERFLOW, EPROTONOSUPPORT, ETIMEDOUT, and EWOULDBLOCK.

Referenced by pg_strerror_r().

gnuish_strerror_r()

static char * gnuish_strerror_r ( int  errnum, char *  buf, size_t  buflen  )

static

Definition at line 85 of file strerror.c.

{
#ifdef HAVE_STRERROR_R
#ifdef STRERROR_R_INT
    /* POSIX API */
    if (strerror_r(errnum, buf, buflen) == 0)
        return buf;
    return NULL;                /* let caller deal with failure */
#else
    /* GNU API */
    return strerror_r(errnum, buf, buflen);
#endif
#else                           /* !HAVE_STRERROR_R */
    char       *sbuf = strerror(errnum);
 
    if (sbuf == NULL)           /* can this still happen anywhere? */
        return NULL;
    /* To minimize thread-unsafety hazard, copy into caller's buffer */
    strlcpy(buf, sbuf, buflen);
    return buf;
#endif
}

References buf, strerror, strerror_r, and strlcpy().

Referenced by pg_strerror_r().

pg_strerror()

char * pg_strerror

(

int

errnum

)

Definition at line 35 of file strerror.c.

{
    static char errorstr_buf[PG_STRERROR_R_BUFLEN];
 
    return pg_strerror_r(errnum, errorstr_buf, sizeof(errorstr_buf));
}

References pg_strerror_r(), and PG_STRERROR_R_BUFLEN.

pg_strerror_r()

char * pg_strerror_r	(	int	errnum,
		char *	buf,
		size_t	buflen
	)

Definition at line 46 of file strerror.c.

{
    char       *str;
 
    /* If it's a Windows Winsock error, that needs special handling */
#ifdef WIN32
    /* Winsock error code range, per WinError.h */
    if (errnum >= 10000 && errnum <= 11999)
        return win32_socket_strerror(errnum, buf, buflen);
#endif
 
    /* Try the platform's strerror_r(), or maybe just strerror() */
    str = gnuish_strerror_r(errnum, buf, buflen);
 
    /*
     * Some strerror()s return an empty string for out-of-range errno.  This
     * is ANSI C spec compliant, but not exactly useful.  Also, we may get
     * back strings of question marks if libc cannot transcode the message to
     * the codeset specified by LC_CTYPE.  If we get nothing useful, first try
     * get_errno_symbol(), and if that fails, print the numeric errno.
     */
    if (str == NULL || *str == '\0' || *str == '?')
        str = get_errno_symbol(errnum);
 
    if (str == NULL)
    {
        snprintf(buf, buflen, _("operating system error %d"), errnum);
        str = buf;
    }
 
    return str;
}

References _, buf, get_errno_symbol(), gnuish_strerror_r(), snprintf, and str.

Referenced by pg_strerror().