diff options
Diffstat (limited to 'src/lib/libc/string/strdup.3')
| -rw-r--r-- | src/lib/libc/string/strdup.3 | 54 |
1 files changed, 38 insertions, 16 deletions
diff --git a/src/lib/libc/string/strdup.3 b/src/lib/libc/string/strdup.3 index 925cbf3d46..9c154c7d70 100644 --- a/src/lib/libc/string/strdup.3 +++ b/src/lib/libc/string/strdup.3 | |||
| @@ -1,5 +1,7 @@ | |||
| 1 | .\" Copyright (c) 1990, 1991 The Regents of the University of California. | 1 | .\" $OpenBSD: strdup.3,v 1.10 2000/04/21 15:32:15 aaron Exp $ |
| 2 | .\" All rights reserved. | 2 | .\" |
| 3 | .\" Copyright (c) 1990, 1991, 1993 | ||
| 4 | .\" The Regents of the University of California. All rights reserved. | ||
| 3 | .\" | 5 | .\" |
| 4 | .\" Redistribution and use in source and binary forms, with or without | 6 | .\" Redistribution and use in source and binary forms, with or without |
| 5 | .\" modification, are permitted provided that the following conditions | 7 | .\" modification, are permitted provided that the following conditions |
| @@ -29,10 +31,9 @@ | |||
| 29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | 31 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | .\" SUCH DAMAGE. | 32 | .\" SUCH DAMAGE. |
| 31 | .\" | 33 | .\" |
| 32 | .\" from: @(#)strdup.3 5.3 (Berkeley) 4/19/91 | 34 | .\" @(#)strdup.3 8.1 (Berkeley) 6/9/93 |
| 33 | .\" $Id: strdup.3,v 1.1.1.1 1995/10/18 08:42:22 deraadt Exp $ | ||
| 34 | .\" | 35 | .\" |
| 35 | .Dd April 19, 1991 | 36 | .Dd June 9, 1993 |
| 36 | .Dt STRDUP 3 | 37 | .Dt STRDUP 3 |
| 37 | .Os | 38 | .Os |
| 38 | .Sh NAME | 39 | .Sh NAME |
| @@ -41,25 +42,46 @@ | |||
| 41 | .Sh SYNOPSIS | 42 | .Sh SYNOPSIS |
| 42 | .Fd #include <string.h> | 43 | .Fd #include <string.h> |
| 43 | .Ft char * | 44 | .Ft char * |
| 44 | .Fn strdup "const char *str" | 45 | .Fn strdup "const char *s" |
| 45 | .Sh DESCRIPTION | 46 | .Sh DESCRIPTION |
| 46 | The | 47 | The |
| 47 | .Fn strdup | 48 | .Fn strdup |
| 48 | function | 49 | function allocates sufficient memory for a copy of the string |
| 49 | allocates sufficient memory for a copy | 50 | .Fa s , |
| 50 | of the string | ||
| 51 | .Fa str , | ||
| 52 | does the copy, and returns a pointer to it. | 51 | does the copy, and returns a pointer to it. |
| 53 | The pointer may subsequently be used as an | 52 | The pointer may subsequently be used as an argument to the function |
| 54 | argument to the function | ||
| 55 | .Xr free 3 . | 53 | .Xr free 3 . |
| 54 | .Pp | ||
| 55 | If insufficient memory is available, | ||
| 56 | .Dv NULL | ||
| 57 | is returned. | ||
| 58 | .Sh EXAMPLES | ||
| 59 | The following will point | ||
| 60 | .Va p | ||
| 61 | to an allocated area of memory containing the null-terminated string | ||
| 62 | .Qq foobar : | ||
| 63 | .Bd -literal -offset indent | ||
| 64 | char *p; | ||
| 65 | |||
| 66 | if ((p = strdup("foobar")) == NULL) { | ||
| 67 | fprintf(stderr, "Out of memory.\en"); | ||
| 68 | exit(1); | ||
| 69 | } | ||
| 70 | .Ed | ||
| 71 | .Sh ERRORS | ||
| 72 | The | ||
| 73 | .Fn strdup | ||
| 74 | function may fail and set the external variable | ||
| 75 | .Va errno | ||
| 76 | for any of the errors specified for the library function | ||
| 77 | .Xr malloc 3 . | ||
| 56 | .Sh SEE ALSO | 78 | .Sh SEE ALSO |
| 57 | .Xr free 3 , | 79 | .Xr free 3 , |
| 58 | .Xr malloc 3 , | 80 | .Xr malloc 3 , |
| 59 | .Xt strcpy 3 , | 81 | .Xr strcpy 3 , |
| 60 | .Xt strlen 3 | 82 | .Xr strlen 3 |
| 61 | .Sh HISTORY | 83 | .Sh HISTORY |
| 62 | The | 84 | The |
| 63 | .Fn strdup | 85 | .Fn strdup |
| 64 | function | 86 | function first appeared in |
| 65 | .Ud . | 87 | .Bx 4.4 . |