root/strerror.c

DEFINITIONS

1. strerror

/* 
 * strerror.c --
 *
 *      Source code for the "strerror" library routine.
 *
 * Copyright 1988 Regents of the University of California
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies.  The University of California
 * makes no representations about the suitability of this
 * software for any purpose.  It is provided "as is" without
 * express or implied warranty.
 */

#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/string/RCS/strerror.c,v 1.5 89/03/22 16:06:57 rab Exp $ SPRITE (Berkeley)";
#endif /* not lint */

#include <stdio.h>
#include <string.h>

#ifdef BSD
/*
 * List of known errors:
 */

char *sys_errlist[] = {
    "no error (operation succeeded",            /* 0 */
    "not owner",                                /* EPERM */
    "no such file or directory",                /* ENOENT */
    "no such process",                          /* ESRCH */
    "interrupted system call",                  /* EINTR */
    "I/O error",                                /* EIO */
    "no such device or address",                /* ENXIO */
    "argument list too long",                   /* E2BIG */
    "exec format error",                        /* ENOEXEC */
    "bad file number",                          /* EBADF */
    "no children",                              /* ECHILD */
    "no more processes",                        /* EAGAIN */
    "not enough memory",                        /* ENOMEM */
    "permission denied",                        /* EACCESS */
    "bad address in system call argument",      /* EFAULT */
    "block device required",                    /* ENOTBLK */
    "mount device busy",                        /* EBUSY */
    "file already exists",                      /* EEXIST */
    "cross-domain link",                        /* EXDEV */
    "no such device",                           /* ENODEV */
    "not a directory",                          /* ENOTDIR */
    "illegal operation on a directory",         /* EISDIR */
    "invalid argument",                         /* EINVAL */
    "file table overflow",                      /* ENFILE */
    "too many open files",                      /* EMFILE */
    "inappropriate device for ioctl",           /* ENOTTY */
    "text file or pseudo-device busy",          /* ETXTBSY */
    "file too large",                           /* EFBIG */
    "no space left in file system domain",      /* ENOSPC */
    "illegal seek",                             /* ESPIPE */
    "read-only file system",                    /* EROFS */
    "too many links",                           /* EMLINK */
    "broken pipe",                              /* EPIPE */
    "math argument out of range",               /* EDOM */
    "math result unrepresentable",              /* ERANGE */
    "operation would block",                    /* EWOULDBLOCK */
    "operation now in progress",                /* EINPROGRESS */
    "operation already in progress",            /* EALREADY */
    "socket operation on non-socket",           /* ENOTSOCK */
    "destination address required",             /* EDESTADDRREQ */
    "message too long",                         /* EMSGSIZE */
    "protocol wrong type for socket",           /* EPROTOTYPE */
    "bad proocol option",                       /* ENOPROTOOPT */
    "protocol not suppored",                    /* EPROTONOSUPPORT */
    "socket type not supported",                /* ESOCKTNOSUPPORT */
    "operation not supported on socket",        /* EOPNOTSUPP */
    "protocol family not supported",            /* EPFNOSUPPORT */
    "address family not supported by protocol family",  /* EAFNOSUPPORT */
    "address already in use",                   /* EADDRINUSE */
    "can't assign requested address",           /* EADDRNOTAVAIL */
    "network is down",                          /* ENETDOWN */
    "network is unreachable",                   /* ENETUNREACH */
    "network dropped connection on reset",      /* ENETRESET */
    "software caused connection abort",         /* ECONNABORTED */
    "connection reset by peer",                 /* ECONNRESET */
    "no buffer space available",                /* ENOBUFS */
    "socket is already connected",              /* EISCONN */
    "socket is not connected",                  /* ENOTCONN */
    "can't send afer socket shutdown",          /* ESHUTDOWN */
    "undefined error (59)",                     /* not used */
    "connection timed out",                     /* ETIMEDOUT */
    "connection refused",                       /* ECONNREFUSED */
    "too many levels of symbolic links",        /* ELOOP */
    "file name too long",                       /* ENAMETOOLONG */
    "host is down",                             /* EHOSTDOWN */
    "host is unreachable",                      /* EHOSTUNREACH */
    "directory not empty",                      /* ENOTEMPTY */
    "too many processes",                       /* EPROCLIM */
    "too many users",                           /* EUSERS */
    "disk quota exceeded",                      /* EDQUOT */
    "stale remote file handle",                 /* ESTALE */
    "pathname hit remote file system",          /* EREMOTE */
};
int sys_nerr = sizeof(sys_errlist)/sizeof(char *);
#else
extern char *sys_errlist[];
extern int sys_nerr;
#endif

/*
 *----------------------------------------------------------------------
 *
 * strerror --
 *
 *      Map an integer error number into a printable string.
 *
 * Results:
 *      The return value is a pointer to a string describing
 *      error.  The first character of string isn't capitalized.
 *
 * Side effects:
 *      Each call to this procedure may overwrite the value returned
 *      by the previous call.
 *
 *----------------------------------------------------------------------
 */

char *
strerror(error)
    int error;                  /* Integer identifying error (must be
                                 * one of the officially-defined Sprite
                                 * errors, as defined in errno.h). */
{
    static char defaultMsg[50];

    if ((error <= sys_nerr) && (error > 0)) {
        return sys_errlist[error];
    }
    (void) sprintf(defaultMsg, "unknown error (%d)", error);
    return defaultMsg;
}