1 char *strerror(int errnum);

 1 #include <string.h>    //for strerror(i) 2 #include <stdlib.h> 3 #include <stdio.h> 4  5 int 6 main(void) { 7     int errno; 8     for(errno = 0; errno <= 256; errno++) 9         printf("errno.%2d-%s\n", errno, strerror(errno));10     exit(0);11 }

  1 errno. 0-Success  2 errno. 1-Operation not permitted  3 errno. 2-No such file or directory  4 errno. 3-No such process  5 errno. 4-Interrupted system call  6 errno. 5-Input/output error  7 errno. 6-No such device or address  8 errno. 7-Argument list too long  9 errno. 8-Exec format error 10 errno. 9-Bad file descriptor 11 errno.10-No child processes 12 errno.11-Resource temporarily unavailable 13 errno.12-Cannot allocate memory 14 errno.13-Permission denied 15 errno.14-Bad address 16 errno.15-Block device required 17 errno.16-Device or resource busy 18 errno.17-File exists 19 errno.18-Invalid cross-device link 20 errno.19-No such device 21 errno.20-Not a directory 22 errno.21-Is a directory 23 errno.22-Invalid argument 24 errno.23-Too many open files in system 25 errno.24-Too many open files 26 errno.25-Inappropriate ioctl for device 27 errno.26-Text file busy 28 errno.27-File too large 29 errno.28-No space left on device 30 errno.29-Illegal seek 31 errno.30-Read-only file system 32 errno.31-Too many links 33 errno.32-Broken pipe 34 errno.33-Numerical argument out of domain 35 errno.34-Numerical result out of range 36 errno.35-Resource deadlock avoided 37 errno.36-File name too long 38 errno.37-No locks available 39 errno.38-Function not implemented 40 errno.39-Directory not empty 41 errno.40-Too many levels of symbolic links 42 errno.41-Unknown error 41 43 errno.42-No message of desired type 44 errno.43-Identifier removed 45 errno.44-Channel number out of range 46 errno.45-Level 2 not synchronized 47 errno.46-Level 3 halted 48 errno.47-Level 3 reset 49 errno.48-Link number out of range 50 errno.49-Protocol driver not attached 51 errno.50-No CSI structure available 52 errno.51-Level 2 halted 53 errno.52-Invalid exchange 54 errno.53-Invalid request descriptor 55 errno.54-Exchange full 56 errno.55-No anode 57 errno.56-Invalid request code 58 errno.57-Invalid slot 59 errno.58-Unknown error 58 60 errno.59-Bad font file format 61 errno.60-Device not a stream 62 errno.61-No data available 63 errno.62-Timer expired 64 errno.63-Out of streams resources 65 errno.64-Machine is not on the network 66 errno.65-Package not installed 67 errno.66-Object is remote 68 errno.67-Link has been severed 69 errno.68-Advertise error 70 errno.69-Srmount error 71 errno.70-Communication error on send 72 errno.71-Protocol error 73 errno.72-Multihop attempted 74 errno.73-RFS specific error 75 errno.74-Bad message 76 errno.75-Value too large for defined data type 77 errno.76-Name not unique on network 78 errno.77-File descriptor in bad state 79 errno.78-Remote address changed 80 errno.79-Can not access a needed shared library 81 errno.80-Accessing a corrupted shared library 82 errno.81-.lib section in a.out corrupted 83 errno.82-Attempting to link in too many shared libraries 84 errno.83-Cannot exec a shared library directly 85 errno.84-Invalid or incomplete multibyte or wide character 86 errno.85-Interrupted system call should be restarted 87 errno.86-Streams pipe error 88 errno.87-Too many users 89 errno.88-Socket operation on non-socket 90 errno.89-Destination address required 91 errno.90-Message too long 92 errno.91-Protocol wrong type for socket 93 errno.92-Protocol not available 94 errno.93-Protocol not supported 95 errno.94-Socket type not supported 96 errno.95-Operation not supported 97 errno.96-Protocol family not supported 98 errno.97-Address family not supported by protocol 99 errno.98-Address already in use100 errno.99-Cannot assign requested address101 errno.100-Network is down102 errno.101-Network is unreachable103 errno.102-Network dropped connection on reset104 errno.103-Software caused connection abort105 errno.104-Connection reset by peer106 errno.105-No buffer space available107 errno.106-Transport endpoint is already connected108 errno.107-Transport endpoint is not connected109 errno.108-Cannot send after transport endpoint shutdown110 errno.109-Too many references: cannot splice111 errno.110-Connection timed out112 errno.111-Connection refused113 errno.112-Host is down114 errno.113-No route to host115 errno.114-Operation already in progress116 errno.115-Operation now in progress117 errno.116-Stale NFS file handle118 errno.117-Structure needs cleaning119 errno.118-Not a XENIX named type file120 errno.119-No XENIX semaphores available121 errno.120-Is a named type file122 errno.121-Remote I/O error123 errno.122-Disk quota exceeded124 errno.123-No medium found125 errno.124-Wrong medium type126 errno.125-Operation canceled127 errno.126-Required key not available128 errno.127-Key has expired129 errno.128-Key has been revoked130 errno.129-Key was rejected by service131 errno.130-Owner died132 errno.131-State not recoverable