| 1 | /* Extended support for using errno values.
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| 2 | Written by Fred Fish. [email protected]
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| 3 | This file is in the public domain. --Per Bothner. */
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| 4 |
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| 5 | #include "ansidecl.h"
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| 6 | #include "libiberty.h"
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| 7 |
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| 8 | #include "config.h"
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| 9 |
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| 10 | #ifdef HAVE_SYS_ERRLIST
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| 11 | /* Note that errno.h (not sure what OS) or stdio.h (BSD 4.4, at least)
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| 12 | might declare sys_errlist in a way that the compiler might consider
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| 13 | incompatible with our later declaration, perhaps by using const
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| 14 | attributes. So we hide the declaration in errno.h (if any) using a
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| 15 | macro. */
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| 16 | #define sys_errlist sys_errlist__
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| 17 | #endif
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| 18 |
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| 19 | #include <stdio.h>
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| 20 | #include <errno.h>
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| 21 |
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| 22 | #ifdef HAVE_SYS_ERRLIST
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| 23 | #undef sys_errlist
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| 24 | #endif
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| 25 |
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| 26 | /* Routines imported from standard C runtime libraries. */
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| 27 |
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| 28 | #ifdef HAVE_STDLIB_H
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| 29 | #include <stdlib.h>
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| 30 | #else
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| 31 | extern PTR malloc ();
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| 32 | #endif
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| 33 |
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| 34 | #ifdef HAVE_STRING_H
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| 35 | #include <string.h>
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| 36 | #else
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| 37 | extern PTR memset ();
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| 38 | #endif
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| 39 |
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| 40 | #ifndef MAX
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| 41 | # define MAX(a,b) ((a) > (b) ? (a) : (b))
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| 42 | #endif
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| 43 |
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| 44 | static void init_error_tables PARAMS ((void));
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| 45 |
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| 46 | /* Translation table for errno values. See intro(2) in most UNIX systems
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| 47 | Programmers Reference Manuals.
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| 48 |
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| 49 | Note that this table is generally only accessed when it is used at runtime
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| 50 | to initialize errno name and message tables that are indexed by errno
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| 51 | value.
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| 52 |
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| 53 | Not all of these errnos will exist on all systems. This table is the only
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| 54 | thing that should have to be updated as new error numbers are introduced.
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| 55 | It's sort of ugly, but at least its portable. */
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| 56 |
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| 57 | struct error_info
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| 58 | {
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| 59 | int value; /* The numeric value from <errno.h> */
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| 60 | const char *name; /* The equivalent symbolic value */
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| 61 | #ifndef HAVE_SYS_ERRLIST
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| 62 | const char *msg; /* Short message about this value */
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| 63 | #endif
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| 64 | };
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| 65 |
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| 66 | #ifndef HAVE_SYS_ERRLIST
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| 67 | # define ENTRY(value, name, msg) {value, name, msg}
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| 68 | #else
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| 69 | # define ENTRY(value, name, msg) {value, name}
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| 70 | #endif
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| 71 |
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| 72 | static const struct error_info error_table[] =
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| 73 | {
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| 74 | #if defined (EPERM)
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| 75 | ENTRY(EPERM, "EPERM", "Not owner"),
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| 76 | #endif
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| 77 | #if defined (ENOENT)
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| 78 | ENTRY(ENOENT, "ENOENT", "No such file or directory"),
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| 79 | #endif
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| 80 | #if defined (ESRCH)
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| 81 | ENTRY(ESRCH, "ESRCH", "No such process"),
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| 82 | #endif
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| 83 | #if defined (EINTR)
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| 84 | ENTRY(EINTR, "EINTR", "Interrupted system call"),
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| 85 | #endif
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| 86 | #if defined (EIO)
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| 87 | ENTRY(EIO, "EIO", "I/O error"),
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| 88 | #endif
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| 89 | #if defined (ENXIO)
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| 90 | ENTRY(ENXIO, "ENXIO", "No such device or address"),
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| 91 | #endif
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| 92 | #if defined (E2BIG)
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| 93 | ENTRY(E2BIG, "E2BIG", "Arg list too long"),
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| 94 | #endif
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| 95 | #if defined (ENOEXEC)
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| 96 | ENTRY(ENOEXEC, "ENOEXEC", "Exec format error"),
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| 97 | #endif
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| 98 | #if defined (EBADF)
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| 99 | ENTRY(EBADF, "EBADF", "Bad file number"),
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| 100 | #endif
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| 101 | #if defined (ECHILD)
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| 102 | ENTRY(ECHILD, "ECHILD", "No child processes"),
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| 103 | #endif
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| 104 | #if defined (EWOULDBLOCK) /* Put before EAGAIN, sometimes aliased */
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| 105 | ENTRY(EWOULDBLOCK, "EWOULDBLOCK", "Operation would block"),
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| 106 | #endif
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| 107 | #if defined (EAGAIN)
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| 108 | ENTRY(EAGAIN, "EAGAIN", "No more processes"),
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| 109 | #endif
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| 110 | #if defined (ENOMEM)
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| 111 | ENTRY(ENOMEM, "ENOMEM", "Not enough space"),
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| 112 | #endif
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| 113 | #if defined (EACCES)
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| 114 | ENTRY(EACCES, "EACCES", "Permission denied"),
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| 115 | #endif
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| 116 | #if defined (EFAULT)
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| 117 | ENTRY(EFAULT, "EFAULT", "Bad address"),
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| 118 | #endif
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| 119 | #if defined (ENOTBLK)
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| 120 | ENTRY(ENOTBLK, "ENOTBLK", "Block device required"),
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| 121 | #endif
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| 122 | #if defined (EBUSY)
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| 123 | ENTRY(EBUSY, "EBUSY", "Device busy"),
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| 124 | #endif
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| 125 | #if defined (EEXIST)
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| 126 | ENTRY(EEXIST, "EEXIST", "File exists"),
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| 127 | #endif
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| 128 | #if defined (EXDEV)
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| 129 | ENTRY(EXDEV, "EXDEV", "Cross-device link"),
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| 130 | #endif
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| 131 | #if defined (ENODEV)
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| 132 | ENTRY(ENODEV, "ENODEV", "No such device"),
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| 133 | #endif
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| 134 | #if defined (ENOTDIR)
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| 135 | ENTRY(ENOTDIR, "ENOTDIR", "Not a directory"),
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| 136 | #endif
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| 137 | #if defined (EISDIR)
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| 138 | ENTRY(EISDIR, "EISDIR", "Is a directory"),
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| 139 | #endif
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| 140 | #if defined (EINVAL)
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| 141 | ENTRY(EINVAL, "EINVAL", "Invalid argument"),
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| 142 | #endif
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| 143 | #if defined (ENFILE)
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| 144 | ENTRY(ENFILE, "ENFILE", "File table overflow"),
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| 145 | #endif
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| 146 | #if defined (EMFILE)
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| 147 | ENTRY(EMFILE, "EMFILE", "Too many open files"),
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| 148 | #endif
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| 149 | #if defined (ENOTTY)
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| 150 | ENTRY(ENOTTY, "ENOTTY", "Not a typewriter"),
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| 151 | #endif
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| 152 | #if defined (ETXTBSY)
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| 153 | ENTRY(ETXTBSY, "ETXTBSY", "Text file busy"),
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| 154 | #endif
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| 155 | #if defined (EFBIG)
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| 156 | ENTRY(EFBIG, "EFBIG", "File too large"),
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| 157 | #endif
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| 158 | #if defined (ENOSPC)
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| 159 | ENTRY(ENOSPC, "ENOSPC", "No space left on device"),
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| 160 | #endif
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| 161 | #if defined (ESPIPE)
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| 162 | ENTRY(ESPIPE, "ESPIPE", "Illegal seek"),
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| 163 | #endif
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| 164 | #if defined (EROFS)
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| 165 | ENTRY(EROFS, "EROFS", "Read-only file system"),
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| 166 | #endif
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| 167 | #if defined (EMLINK)
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| 168 | ENTRY(EMLINK, "EMLINK", "Too many links"),
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| 169 | #endif
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| 170 | #if defined (EPIPE)
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| 171 | ENTRY(EPIPE, "EPIPE", "Broken pipe"),
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| 172 | #endif
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| 173 | #if defined (EDOM)
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| 174 | ENTRY(EDOM, "EDOM", "Math argument out of domain of func"),
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| 175 | #endif
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| 176 | #if defined (ERANGE)
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| 177 | ENTRY(ERANGE, "ERANGE", "Math result not representable"),
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| 178 | #endif
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| 179 | #if defined (ENOMSG)
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| 180 | ENTRY(ENOMSG, "ENOMSG", "No message of desired type"),
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| 181 | #endif
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| 182 | #if defined (EIDRM)
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| 183 | ENTRY(EIDRM, "EIDRM", "Identifier removed"),
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| 184 | #endif
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| 185 | #if defined (ECHRNG)
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| 186 | ENTRY(ECHRNG, "ECHRNG", "Channel number out of range"),
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| 187 | #endif
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| 188 | #if defined (EL2NSYNC)
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| 189 | ENTRY(EL2NSYNC, "EL2NSYNC", "Level 2 not synchronized"),
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| 190 | #endif
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| 191 | #if defined (EL3HLT)
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| 192 | ENTRY(EL3HLT, "EL3HLT", "Level 3 halted"),
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| 193 | #endif
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| 194 | #if defined (EL3RST)
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| 195 | ENTRY(EL3RST, "EL3RST", "Level 3 reset"),
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| 196 | #endif
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| 197 | #if defined (ELNRNG)
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| 198 | ENTRY(ELNRNG, "ELNRNG", "Link number out of range"),
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| 199 | #endif
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| 200 | #if defined (EUNATCH)
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| 201 | ENTRY(EUNATCH, "EUNATCH", "Protocol driver not attached"),
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| 202 | #endif
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| 203 | #if defined (ENOCSI)
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| 204 | ENTRY(ENOCSI, "ENOCSI", "No CSI structure available"),
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| 205 | #endif
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| 206 | #if defined (EL2HLT)
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| 207 | ENTRY(EL2HLT, "EL2HLT", "Level 2 halted"),
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| 208 | #endif
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| 209 | #if defined (EDEADLK)
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| 210 | ENTRY(EDEADLK, "EDEADLK", "Deadlock condition"),
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| 211 | #endif
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| 212 | #if defined (ENOLCK)
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| 213 | ENTRY(ENOLCK, "ENOLCK", "No record locks available"),
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| 214 | #endif
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| 215 | #if defined (EBADE)
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| 216 | ENTRY(EBADE, "EBADE", "Invalid exchange"),
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| 217 | #endif
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| 218 | #if defined (EBADR)
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| 219 | ENTRY(EBADR, "EBADR", "Invalid request descriptor"),
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| 220 | #endif
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| 221 | #if defined (EXFULL)
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| 222 | ENTRY(EXFULL, "EXFULL", "Exchange full"),
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| 223 | #endif
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| 224 | #if defined (ENOANO)
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| 225 | ENTRY(ENOANO, "ENOANO", "No anode"),
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| 226 | #endif
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| 227 | #if defined (EBADRQC)
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| 228 | ENTRY(EBADRQC, "EBADRQC", "Invalid request code"),
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| 229 | #endif
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| 230 | #if defined (EBADSLT)
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| 231 | ENTRY(EBADSLT, "EBADSLT", "Invalid slot"),
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| 232 | #endif
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| 233 | #if defined (EDEADLOCK)
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| 234 | ENTRY(EDEADLOCK, "EDEADLOCK", "File locking deadlock error"),
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| 235 | #endif
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| 236 | #if defined (EBFONT)
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| 237 | ENTRY(EBFONT, "EBFONT", "Bad font file format"),
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| 238 | #endif
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| 239 | #if defined (ENOSTR)
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| 240 | ENTRY(ENOSTR, "ENOSTR", "Device not a stream"),
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| 241 | #endif
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| 242 | #if defined (ENODATA)
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| 243 | ENTRY(ENODATA, "ENODATA", "No data available"),
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| 244 | #endif
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| 245 | #if defined (ETIME)
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| 246 | ENTRY(ETIME, "ETIME", "Timer expired"),
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| 247 | #endif
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| 248 | #if defined (ENOSR)
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| 249 | ENTRY(ENOSR, "ENOSR", "Out of streams resources"),
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| 250 | #endif
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| 251 | #if defined (ENONET)
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| 252 | ENTRY(ENONET, "ENONET", "Machine is not on the network"),
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| 253 | #endif
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| 254 | #if defined (ENOPKG)
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| 255 | ENTRY(ENOPKG, "ENOPKG", "Package not installed"),
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| 256 | #endif
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| 257 | #if defined (EREMOTE)
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| 258 | ENTRY(EREMOTE, "EREMOTE", "Object is remote"),
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| 259 | #endif
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| 260 | #if defined (ENOLINK)
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| 261 | ENTRY(ENOLINK, "ENOLINK", "Link has been severed"),
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| 262 | #endif
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| 263 | #if defined (EADV)
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| 264 | ENTRY(EADV, "EADV", "Advertise error"),
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| 265 | #endif
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| 266 | #if defined (ESRMNT)
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| 267 | ENTRY(ESRMNT, "ESRMNT", "Srmount error"),
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| 268 | #endif
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| 269 | #if defined (ECOMM)
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| 270 | ENTRY(ECOMM, "ECOMM", "Communication error on send"),
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| 271 | #endif
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| 272 | #if defined (EPROTO)
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| 273 | ENTRY(EPROTO, "EPROTO", "Protocol error"),
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| 274 | #endif
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| 275 | #if defined (EMULTIHOP)
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| 276 | ENTRY(EMULTIHOP, "EMULTIHOP", "Multihop attempted"),
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| 277 | #endif
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| 278 | #if defined (EDOTDOT)
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| 279 | ENTRY(EDOTDOT, "EDOTDOT", "RFS specific error"),
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| 280 | #endif
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| 281 | #if defined (EBADMSG)
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| 282 | ENTRY(EBADMSG, "EBADMSG", "Not a data message"),
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| 283 | #endif
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| 284 | #if defined (ENAMETOOLONG)
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| 285 | ENTRY(ENAMETOOLONG, "ENAMETOOLONG", "File name too long"),
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| 286 | #endif
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| 287 | #if defined (EOVERFLOW)
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| 288 | ENTRY(EOVERFLOW, "EOVERFLOW", "Value too large for defined data type"),
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| 289 | #endif
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| 290 | #if defined (ENOTUNIQ)
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| 291 | ENTRY(ENOTUNIQ, "ENOTUNIQ", "Name not unique on network"),
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| 292 | #endif
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| 293 | #if defined (EBADFD)
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| 294 | ENTRY(EBADFD, "EBADFD", "File descriptor in bad state"),
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| 295 | #endif
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| 296 | #if defined (EREMCHG)
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| 297 | ENTRY(EREMCHG, "EREMCHG", "Remote address changed"),
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| 298 | #endif
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| 299 | #if defined (ELIBACC)
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| 300 | ENTRY(ELIBACC, "ELIBACC", "Can not access a needed shared library"),
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| 301 | #endif
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| 302 | #if defined (ELIBBAD)
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| 303 | ENTRY(ELIBBAD, "ELIBBAD", "Accessing a corrupted shared library"),
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| 304 | #endif
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| 305 | #if defined (ELIBSCN)
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| 306 | ENTRY(ELIBSCN, "ELIBSCN", ".lib section in a.out corrupted"),
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| 307 | #endif
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| 308 | #if defined (ELIBMAX)
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| 309 | ENTRY(ELIBMAX, "ELIBMAX", "Attempting to link in too many shared libraries"),
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| 310 | #endif
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| 311 | #if defined (ELIBEXEC)
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| 312 | ENTRY(ELIBEXEC, "ELIBEXEC", "Cannot exec a shared library directly"),
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| 313 | #endif
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| 314 | #if defined (EILSEQ)
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| 315 | ENTRY(EILSEQ, "EILSEQ", "Illegal byte sequence"),
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| 316 | #endif
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| 317 | #if defined (ENOSYS)
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| 318 | ENTRY(ENOSYS, "ENOSYS", "Operation not applicable"),
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| 319 | #endif
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| 320 | #if defined (ELOOP)
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| 321 | ENTRY(ELOOP, "ELOOP", "Too many symbolic links encountered"),
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| 322 | #endif
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| 323 | #if defined (ERESTART)
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| 324 | ENTRY(ERESTART, "ERESTART", "Interrupted system call should be restarted"),
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| 325 | #endif
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| 326 | #if defined (ESTRPIPE)
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| 327 | ENTRY(ESTRPIPE, "ESTRPIPE", "Streams pipe error"),
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| 328 | #endif
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| 329 | #if defined (ENOTEMPTY)
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| 330 | ENTRY(ENOTEMPTY, "ENOTEMPTY", "Directory not empty"),
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| 331 | #endif
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| 332 | #if defined (EUSERS)
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| 333 | ENTRY(EUSERS, "EUSERS", "Too many users"),
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| 334 | #endif
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| 335 | #if defined (ENOTSOCK)
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| 336 | ENTRY(ENOTSOCK, "ENOTSOCK", "Socket operation on non-socket"),
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| 337 | #endif
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| 338 | #if defined (EDESTADDRREQ)
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| 339 | ENTRY(EDESTADDRREQ, "EDESTADDRREQ", "Destination address required"),
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| 340 | #endif
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| 341 | #if defined (EMSGSIZE)
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| 342 | ENTRY(EMSGSIZE, "EMSGSIZE", "Message too long"),
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| 343 | #endif
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| 344 | #if defined (EPROTOTYPE)
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| 345 | ENTRY(EPROTOTYPE, "EPROTOTYPE", "Protocol wrong type for socket"),
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| 346 | #endif
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| 347 | #if defined (ENOPROTOOPT)
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| 348 | ENTRY(ENOPROTOOPT, "ENOPROTOOPT", "Protocol not available"),
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| 349 | #endif
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| 350 | #if defined (EPROTONOSUPPORT)
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| 351 | ENTRY(EPROTONOSUPPORT, "EPROTONOSUPPORT", "Protocol not supported"),
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| 352 | #endif
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| 353 | #if defined (ESOCKTNOSUPPORT)
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| 354 | ENTRY(ESOCKTNOSUPPORT, "ESOCKTNOSUPPORT", "Socket type not supported"),
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| 355 | #endif
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| 356 | #if defined (EOPNOTSUPP)
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| 357 | ENTRY(EOPNOTSUPP, "EOPNOTSUPP", "Operation not supported on transport endpoint"),
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| 358 | #endif
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| 359 | #if defined (EPFNOSUPPORT)
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| 360 | ENTRY(EPFNOSUPPORT, "EPFNOSUPPORT", "Protocol family not supported"),
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| 361 | #endif
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| 362 | #if defined (EAFNOSUPPORT)
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| 363 | ENTRY(EAFNOSUPPORT, "EAFNOSUPPORT", "Address family not supported by protocol"),
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| 364 | #endif
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| 365 | #if defined (EADDRINUSE)
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| 366 | ENTRY(EADDRINUSE, "EADDRINUSE", "Address already in use"),
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| 367 | #endif
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| 368 | #if defined (EADDRNOTAVAIL)
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| 369 | ENTRY(EADDRNOTAVAIL, "EADDRNOTAVAIL","Cannot assign requested address"),
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| 370 | #endif
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| 371 | #if defined (ENETDOWN)
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| 372 | ENTRY(ENETDOWN, "ENETDOWN", "Network is down"),
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| 373 | #endif
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| 374 | #if defined (ENETUNREACH)
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| 375 | ENTRY(ENETUNREACH, "ENETUNREACH", "Network is unreachable"),
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| 376 | #endif
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| 377 | #if defined (ENETRESET)
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| 378 | ENTRY(ENETRESET, "ENETRESET", "Network dropped connection because of reset"),
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| 379 | #endif
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| 380 | #if defined (ECONNABORTED)
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| 381 | ENTRY(ECONNABORTED, "ECONNABORTED", "Software caused connection abort"),
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| 382 | #endif
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| 383 | #if defined (ECONNRESET)
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| 384 | ENTRY(ECONNRESET, "ECONNRESET", "Connection reset by peer"),
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| 385 | #endif
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| 386 | #if defined (ENOBUFS)
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| 387 | ENTRY(ENOBUFS, "ENOBUFS", "No buffer space available"),
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| 388 | #endif
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| 389 | #if defined (EISCONN)
|
|---|
| 390 | ENTRY(EISCONN, "EISCONN", "Transport endpoint is already connected"),
|
|---|
| 391 | #endif
|
|---|
| 392 | #if defined (ENOTCONN)
|
|---|
| 393 | ENTRY(ENOTCONN, "ENOTCONN", "Transport endpoint is not connected"),
|
|---|
| 394 | #endif
|
|---|
| 395 | #if defined (ESHUTDOWN)
|
|---|
| 396 | ENTRY(ESHUTDOWN, "ESHUTDOWN", "Cannot send after transport endpoint shutdown"),
|
|---|
| 397 | #endif
|
|---|
| 398 | #if defined (ETOOMANYREFS)
|
|---|
| 399 | ENTRY(ETOOMANYREFS, "ETOOMANYREFS", "Too many references: cannot splice"),
|
|---|
| 400 | #endif
|
|---|
| 401 | #if defined (ETIMEDOUT)
|
|---|
| 402 | ENTRY(ETIMEDOUT, "ETIMEDOUT", "Connection timed out"),
|
|---|
| 403 | #endif
|
|---|
| 404 | #if defined (ECONNREFUSED)
|
|---|
| 405 | ENTRY(ECONNREFUSED, "ECONNREFUSED", "Connection refused"),
|
|---|
| 406 | #endif
|
|---|
| 407 | #if defined (EHOSTDOWN)
|
|---|
| 408 | ENTRY(EHOSTDOWN, "EHOSTDOWN", "Host is down"),
|
|---|
| 409 | #endif
|
|---|
| 410 | #if defined (EHOSTUNREACH)
|
|---|
| 411 | ENTRY(EHOSTUNREACH, "EHOSTUNREACH", "No route to host"),
|
|---|
| 412 | #endif
|
|---|
| 413 | #if defined (EALREADY)
|
|---|
| 414 | ENTRY(EALREADY, "EALREADY", "Operation already in progress"),
|
|---|
| 415 | #endif
|
|---|
| 416 | #if defined (EINPROGRESS)
|
|---|
| 417 | ENTRY(EINPROGRESS, "EINPROGRESS", "Operation now in progress"),
|
|---|
| 418 | #endif
|
|---|
| 419 | #if defined (ESTALE)
|
|---|
| 420 | ENTRY(ESTALE, "ESTALE", "Stale NFS file handle"),
|
|---|
| 421 | #endif
|
|---|
| 422 | #if defined (EUCLEAN)
|
|---|
| 423 | ENTRY(EUCLEAN, "EUCLEAN", "Structure needs cleaning"),
|
|---|
| 424 | #endif
|
|---|
| 425 | #if defined (ENOTNAM)
|
|---|
| 426 | ENTRY(ENOTNAM, "ENOTNAM", "Not a XENIX named type file"),
|
|---|
| 427 | #endif
|
|---|
| 428 | #if defined (ENAVAIL)
|
|---|
| 429 | ENTRY(ENAVAIL, "ENAVAIL", "No XENIX semaphores available"),
|
|---|
| 430 | #endif
|
|---|
| 431 | #if defined (EISNAM)
|
|---|
| 432 | ENTRY(EISNAM, "EISNAM", "Is a named type file"),
|
|---|
| 433 | #endif
|
|---|
| 434 | #if defined (EREMOTEIO)
|
|---|
| 435 | ENTRY(EREMOTEIO, "EREMOTEIO", "Remote I/O error"),
|
|---|
| 436 | #endif
|
|---|
| 437 | ENTRY(0, NULL, NULL)
|
|---|
| 438 | };
|
|---|
| 439 |
|
|---|
| 440 | #ifdef EVMSERR
|
|---|
| 441 | /* This is not in the table, because the numeric value of EVMSERR (32767)
|
|---|
| 442 | lies outside the range of sys_errlist[]. */
|
|---|
| 443 | static struct { int value; const char *name, *msg; }
|
|---|
| 444 | evmserr = { EVMSERR, "EVMSERR", "VMS-specific error" };
|
|---|
| 445 | #endif
|
|---|
| 446 |
|
|---|
| 447 | /* Translation table allocated and initialized at runtime. Indexed by the
|
|---|
| 448 | errno value to find the equivalent symbolic value. */
|
|---|
| 449 |
|
|---|
| 450 | static const char **error_names;
|
|---|
| 451 | static int num_error_names = 0;
|
|---|
| 452 |
|
|---|
| 453 | /* Translation table allocated and initialized at runtime, if it does not
|
|---|
| 454 | already exist in the host environment. Indexed by the errno value to find
|
|---|
| 455 | the descriptive string.
|
|---|
| 456 |
|
|---|
| 457 | We don't export it for use in other modules because even though it has the
|
|---|
| 458 | same name, it differs from other implementations in that it is dynamically
|
|---|
| 459 | initialized rather than statically initialized. */
|
|---|
| 460 |
|
|---|
| 461 | #ifndef HAVE_SYS_ERRLIST
|
|---|
| 462 |
|
|---|
| 463 | static int sys_nerr;
|
|---|
| 464 | static const char **sys_errlist;
|
|---|
| 465 |
|
|---|
| 466 | #else
|
|---|
| 467 |
|
|---|
| 468 | extern int sys_nerr;
|
|---|
| 469 | extern char *sys_errlist[];
|
|---|
| 470 |
|
|---|
| 471 | #endif
|
|---|
| 472 |
|
|---|
| 473 |
|
|---|
| 474 | /*
|
|---|
| 475 |
|
|---|
| 476 | NAME
|
|---|
| 477 |
|
|---|
| 478 | init_error_tables -- initialize the name and message tables
|
|---|
| 479 |
|
|---|
| 480 | SYNOPSIS
|
|---|
| 481 |
|
|---|
| 482 | static void init_error_tables ();
|
|---|
| 483 |
|
|---|
| 484 | DESCRIPTION
|
|---|
| 485 |
|
|---|
| 486 | Using the error_table, which is initialized at compile time, generate
|
|---|
| 487 | the error_names and the sys_errlist (if needed) tables, which are
|
|---|
| 488 | indexed at runtime by a specific errno value.
|
|---|
| 489 |
|
|---|
| 490 | BUGS
|
|---|
| 491 |
|
|---|
| 492 | The initialization of the tables may fail under low memory conditions,
|
|---|
| 493 | in which case we don't do anything particularly useful, but we don't
|
|---|
| 494 | bomb either. Who knows, it might succeed at a later point if we free
|
|---|
| 495 | some memory in the meantime. In any case, the other routines know
|
|---|
| 496 | how to deal with lack of a table after trying to initialize it. This
|
|---|
| 497 | may or may not be considered to be a bug, that we don't specifically
|
|---|
| 498 | warn about this particular failure mode.
|
|---|
| 499 |
|
|---|
| 500 | */
|
|---|
| 501 |
|
|---|
| 502 | static void
|
|---|
| 503 | init_error_tables ()
|
|---|
| 504 | {
|
|---|
| 505 | const struct error_info *eip;
|
|---|
| 506 | int nbytes;
|
|---|
| 507 |
|
|---|
| 508 | /* If we haven't already scanned the error_table once to find the maximum
|
|---|
| 509 | errno value, then go find it now. */
|
|---|
| 510 |
|
|---|
| 511 | if (num_error_names == 0)
|
|---|
| 512 | {
|
|---|
| 513 | for (eip = error_table; eip -> name != NULL; eip++)
|
|---|
| 514 | {
|
|---|
| 515 | if (eip -> value >= num_error_names)
|
|---|
| 516 | {
|
|---|
| 517 | num_error_names = eip -> value + 1;
|
|---|
| 518 | }
|
|---|
| 519 | }
|
|---|
| 520 | }
|
|---|
| 521 |
|
|---|
| 522 | /* Now attempt to allocate the error_names table, zero it out, and then
|
|---|
| 523 | initialize it from the statically initialized error_table. */
|
|---|
| 524 |
|
|---|
| 525 | if (error_names == NULL)
|
|---|
| 526 | {
|
|---|
| 527 | nbytes = num_error_names * sizeof (char *);
|
|---|
| 528 | if ((error_names = (const char **) malloc (nbytes)) != NULL)
|
|---|
| 529 | {
|
|---|
| 530 | memset (error_names, 0, nbytes);
|
|---|
| 531 | for (eip = error_table; eip -> name != NULL; eip++)
|
|---|
| 532 | {
|
|---|
| 533 | error_names[eip -> value] = eip -> name;
|
|---|
| 534 | }
|
|---|
| 535 | }
|
|---|
| 536 | }
|
|---|
| 537 |
|
|---|
| 538 | #ifndef HAVE_SYS_ERRLIST
|
|---|
| 539 |
|
|---|
| 540 | /* Now attempt to allocate the sys_errlist table, zero it out, and then
|
|---|
| 541 | initialize it from the statically initialized error_table. */
|
|---|
| 542 |
|
|---|
| 543 | if (sys_errlist == NULL)
|
|---|
| 544 | {
|
|---|
| 545 | nbytes = num_error_names * sizeof (char *);
|
|---|
| 546 | if ((sys_errlist = (const char **) malloc (nbytes)) != NULL)
|
|---|
| 547 | {
|
|---|
| 548 | memset (sys_errlist, 0, nbytes);
|
|---|
| 549 | sys_nerr = num_error_names;
|
|---|
| 550 | for (eip = error_table; eip -> name != NULL; eip++)
|
|---|
| 551 | {
|
|---|
| 552 | sys_errlist[eip -> value] = eip -> msg;
|
|---|
| 553 | }
|
|---|
| 554 | }
|
|---|
| 555 | }
|
|---|
| 556 |
|
|---|
| 557 | #endif
|
|---|
| 558 |
|
|---|
| 559 | }
|
|---|
| 560 |
|
|---|
| 561 | /*
|
|---|
| 562 |
|
|---|
| 563 | NAME
|
|---|
| 564 |
|
|---|
| 565 | errno_max -- return the max errno value
|
|---|
| 566 |
|
|---|
| 567 | SYNOPSIS
|
|---|
| 568 |
|
|---|
| 569 | int errno_max ();
|
|---|
| 570 |
|
|---|
| 571 | DESCRIPTION
|
|---|
| 572 |
|
|---|
| 573 | Returns the maximum errno value for which a corresponding symbolic
|
|---|
| 574 | name or message is available. Note that in the case where
|
|---|
| 575 | we use the sys_errlist supplied by the system, it is possible for
|
|---|
| 576 | there to be more symbolic names than messages, or vice versa.
|
|---|
| 577 | In fact, the manual page for perror(3C) explicitly warns that one
|
|---|
| 578 | should check the size of the table (sys_nerr) before indexing it,
|
|---|
| 579 | since new error codes may be added to the system before they are
|
|---|
| 580 | added to the table. Thus sys_nerr might be smaller than value
|
|---|
| 581 | implied by the largest errno value defined in <errno.h>.
|
|---|
| 582 |
|
|---|
| 583 | We return the maximum value that can be used to obtain a meaningful
|
|---|
| 584 | symbolic name or message.
|
|---|
| 585 |
|
|---|
| 586 | */
|
|---|
| 587 |
|
|---|
| 588 | int
|
|---|
| 589 | errno_max ()
|
|---|
| 590 | {
|
|---|
| 591 | int maxsize;
|
|---|
| 592 |
|
|---|
| 593 | if (error_names == NULL)
|
|---|
| 594 | {
|
|---|
| 595 | init_error_tables ();
|
|---|
| 596 | }
|
|---|
| 597 | maxsize = MAX (sys_nerr, num_error_names);
|
|---|
| 598 | return (maxsize - 1);
|
|---|
| 599 | }
|
|---|
| 600 |
|
|---|
| 601 | #ifndef HAVE_STRERROR
|
|---|
| 602 |
|
|---|
| 603 | /*
|
|---|
| 604 |
|
|---|
| 605 | NAME
|
|---|
| 606 |
|
|---|
| 607 | strerror -- map an error number to an error message string
|
|---|
| 608 |
|
|---|
| 609 | SYNOPSIS
|
|---|
| 610 |
|
|---|
| 611 | char *strerror (int errnoval)
|
|---|
| 612 |
|
|---|
| 613 | DESCRIPTION
|
|---|
| 614 |
|
|---|
| 615 | Maps an errno number to an error message string, the contents of
|
|---|
| 616 | which are implementation defined. On systems which have the external
|
|---|
| 617 | variables sys_nerr and sys_errlist, these strings will be the same
|
|---|
| 618 | as the ones used by perror().
|
|---|
| 619 |
|
|---|
| 620 | If the supplied error number is within the valid range of indices
|
|---|
| 621 | for the sys_errlist, but no message is available for the particular
|
|---|
| 622 | error number, then returns the string "Error NUM", where NUM is the
|
|---|
| 623 | error number.
|
|---|
| 624 |
|
|---|
| 625 | If the supplied error number is not a valid index into sys_errlist,
|
|---|
| 626 | returns NULL.
|
|---|
| 627 |
|
|---|
| 628 | The returned string is only guaranteed to be valid only until the
|
|---|
| 629 | next call to strerror.
|
|---|
| 630 |
|
|---|
| 631 | */
|
|---|
| 632 |
|
|---|
| 633 | char *
|
|---|
| 634 | strerror (errnoval)
|
|---|
| 635 | int errnoval;
|
|---|
| 636 | {
|
|---|
| 637 | char *msg;
|
|---|
| 638 | static char buf[32];
|
|---|
| 639 |
|
|---|
| 640 | #ifndef HAVE_SYS_ERRLIST
|
|---|
| 641 |
|
|---|
| 642 | if (error_names == NULL)
|
|---|
| 643 | {
|
|---|
| 644 | init_error_tables ();
|
|---|
| 645 | }
|
|---|
| 646 |
|
|---|
| 647 | #endif
|
|---|
| 648 |
|
|---|
| 649 | if ((errnoval < 0) || (errnoval >= sys_nerr))
|
|---|
| 650 | {
|
|---|
| 651 | #ifdef EVMSERR
|
|---|
| 652 | if (errnoval == evmserr.value)
|
|---|
| 653 | msg = evmserr.msg;
|
|---|
| 654 | else
|
|---|
| 655 | #endif
|
|---|
| 656 | /* Out of range, just return NULL */
|
|---|
| 657 | msg = NULL;
|
|---|
| 658 | }
|
|---|
| 659 | else if ((sys_errlist == NULL) || (sys_errlist[errnoval] == NULL))
|
|---|
| 660 | {
|
|---|
| 661 | /* In range, but no sys_errlist or no entry at this index. */
|
|---|
| 662 | sprintf (buf, "Error %d", errnoval);
|
|---|
| 663 | msg = buf;
|
|---|
| 664 | }
|
|---|
| 665 | else
|
|---|
| 666 | {
|
|---|
| 667 | /* In range, and a valid message. Just return the message. */
|
|---|
| 668 | msg = (char *) sys_errlist[errnoval];
|
|---|
| 669 | }
|
|---|
| 670 |
|
|---|
| 671 | return (msg);
|
|---|
| 672 | }
|
|---|
| 673 |
|
|---|
| 674 | #endif /* ! HAVE_STRERROR */
|
|---|
| 675 |
|
|---|
| 676 |
|
|---|
| 677 | /*
|
|---|
| 678 |
|
|---|
| 679 | NAME
|
|---|
| 680 |
|
|---|
| 681 | strerrno -- map an error number to a symbolic name string
|
|---|
| 682 |
|
|---|
| 683 | SYNOPSIS
|
|---|
| 684 |
|
|---|
| 685 | const char *strerrno (int errnoval)
|
|---|
| 686 |
|
|---|
| 687 | DESCRIPTION
|
|---|
| 688 |
|
|---|
| 689 | Given an error number returned from a system call (typically
|
|---|
| 690 | returned in errno), returns a pointer to a string containing the
|
|---|
| 691 | symbolic name of that error number, as found in <errno.h>.
|
|---|
| 692 |
|
|---|
| 693 | If the supplied error number is within the valid range of indices
|
|---|
| 694 | for symbolic names, but no name is available for the particular
|
|---|
| 695 | error number, then returns the string "Error NUM", where NUM is
|
|---|
| 696 | the error number.
|
|---|
| 697 |
|
|---|
| 698 | If the supplied error number is not within the range of valid
|
|---|
| 699 | indices, then returns NULL.
|
|---|
| 700 |
|
|---|
| 701 | BUGS
|
|---|
| 702 |
|
|---|
| 703 | The contents of the location pointed to are only guaranteed to be
|
|---|
| 704 | valid until the next call to strerrno.
|
|---|
| 705 |
|
|---|
| 706 | */
|
|---|
| 707 |
|
|---|
| 708 | const char *
|
|---|
| 709 | strerrno (errnoval)
|
|---|
| 710 | int errnoval;
|
|---|
| 711 | {
|
|---|
| 712 | const char *name;
|
|---|
| 713 | static char buf[32];
|
|---|
| 714 |
|
|---|
| 715 | if (error_names == NULL)
|
|---|
| 716 | {
|
|---|
| 717 | init_error_tables ();
|
|---|
| 718 | }
|
|---|
| 719 |
|
|---|
| 720 | if ((errnoval < 0) || (errnoval >= num_error_names))
|
|---|
| 721 | {
|
|---|
| 722 | #ifdef EVMSERR
|
|---|
| 723 | if (errnoval == evmserr.value)
|
|---|
| 724 | name = evmserr.name;
|
|---|
| 725 | else
|
|---|
| 726 | #endif
|
|---|
| 727 | /* Out of range, just return NULL */
|
|---|
| 728 | name = NULL;
|
|---|
| 729 | }
|
|---|
| 730 | else if ((error_names == NULL) || (error_names[errnoval] == NULL))
|
|---|
| 731 | {
|
|---|
| 732 | /* In range, but no error_names or no entry at this index. */
|
|---|
| 733 | sprintf (buf, "Error %d", errnoval);
|
|---|
| 734 | name = (const char *) buf;
|
|---|
| 735 | }
|
|---|
| 736 | else
|
|---|
| 737 | {
|
|---|
| 738 | /* In range, and a valid name. Just return the name. */
|
|---|
| 739 | name = error_names[errnoval];
|
|---|
| 740 | }
|
|---|
| 741 |
|
|---|
| 742 | return (name);
|
|---|
| 743 | }
|
|---|
| 744 |
|
|---|
| 745 | /*
|
|---|
| 746 |
|
|---|
| 747 | NAME
|
|---|
| 748 |
|
|---|
| 749 | strtoerrno -- map a symbolic errno name to a numeric value
|
|---|
| 750 |
|
|---|
| 751 | SYNOPSIS
|
|---|
| 752 |
|
|---|
| 753 | int strtoerrno (char *name)
|
|---|
| 754 |
|
|---|
| 755 | DESCRIPTION
|
|---|
| 756 |
|
|---|
| 757 | Given the symbolic name of a error number, map it to an errno value.
|
|---|
| 758 | If no translation is found, returns 0.
|
|---|
| 759 |
|
|---|
| 760 | */
|
|---|
| 761 |
|
|---|
| 762 | int
|
|---|
| 763 | strtoerrno (name)
|
|---|
| 764 | const char *name;
|
|---|
| 765 | {
|
|---|
| 766 | int errnoval = 0;
|
|---|
| 767 |
|
|---|
| 768 | if (name != NULL)
|
|---|
| 769 | {
|
|---|
| 770 | if (error_names == NULL)
|
|---|
| 771 | {
|
|---|
| 772 | init_error_tables ();
|
|---|
| 773 | }
|
|---|
| 774 | for (errnoval = 0; errnoval < num_error_names; errnoval++)
|
|---|
| 775 | {
|
|---|
| 776 | if ((error_names[errnoval] != NULL) &&
|
|---|
| 777 | (strcmp (name, error_names[errnoval]) == 0))
|
|---|
| 778 | {
|
|---|
| 779 | break;
|
|---|
| 780 | }
|
|---|
| 781 | }
|
|---|
| 782 | if (errnoval == num_error_names)
|
|---|
| 783 | {
|
|---|
| 784 | #ifdef EVMSERR
|
|---|
| 785 | if (strcmp (name, evmserr.name) == 0)
|
|---|
| 786 | errnoval = evmserr.value;
|
|---|
| 787 | else
|
|---|
| 788 | #endif
|
|---|
| 789 | errnoval = 0;
|
|---|
| 790 | }
|
|---|
| 791 | }
|
|---|
| 792 | return (errnoval);
|
|---|
| 793 | }
|
|---|
| 794 |
|
|---|
| 795 |
|
|---|
| 796 | /* A simple little main that does nothing but print all the errno translations
|
|---|
| 797 | if MAIN is defined and this file is compiled and linked. */
|
|---|
| 798 |
|
|---|
| 799 | #ifdef MAIN
|
|---|
| 800 |
|
|---|
| 801 | #include <stdio.h>
|
|---|
| 802 |
|
|---|
| 803 | int
|
|---|
| 804 | main ()
|
|---|
| 805 | {
|
|---|
| 806 | int errn;
|
|---|
| 807 | int errnmax;
|
|---|
| 808 | const char *name;
|
|---|
| 809 | char *msg;
|
|---|
| 810 | char *strerror ();
|
|---|
| 811 |
|
|---|
| 812 | errnmax = errno_max ();
|
|---|
| 813 | printf ("%d entries in names table.\n", num_error_names);
|
|---|
| 814 | printf ("%d entries in messages table.\n", sys_nerr);
|
|---|
| 815 | printf ("%d is max useful index.\n", errnmax);
|
|---|
| 816 |
|
|---|
| 817 | /* Keep printing values until we get to the end of *both* tables, not
|
|---|
| 818 | *either* table. Note that knowing the maximum useful index does *not*
|
|---|
| 819 | relieve us of the responsibility of testing the return pointer for
|
|---|
| 820 | NULL. */
|
|---|
| 821 |
|
|---|
| 822 | for (errn = 0; errn <= errnmax; errn++)
|
|---|
| 823 | {
|
|---|
| 824 | name = strerrno (errn);
|
|---|
| 825 | name = (name == NULL) ? "<NULL>" : name;
|
|---|
| 826 | msg = strerror (errn);
|
|---|
| 827 | msg = (msg == NULL) ? "<NULL>" : msg;
|
|---|
| 828 | printf ("%-4d%-18s%s\n", errn, name, msg);
|
|---|
| 829 | }
|
|---|
| 830 |
|
|---|
| 831 | return 0;
|
|---|
| 832 | }
|
|---|
| 833 |
|
|---|
| 834 | #endif
|
|---|
