Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 11 | /* Two PD getcwd() implementations. |
| 12 | Author: Guido van Rossum, CWI Amsterdam, Jan 1991, <guido@cwi.nl>. */ |
Guido van Rossum | de9775a | 1991-01-21 14:27:52 +0000 | [diff] [blame] | 13 | |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 14 | #include <stdio.h> |
| 15 | #include <errno.h> |
Guido van Rossum | de9775a | 1991-01-21 14:27:52 +0000 | [diff] [blame] | 16 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 17 | #ifdef HAVE_GETWD |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 18 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 19 | /* Version for BSD systems -- use getwd() */ |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 20 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 21 | #ifdef HAVE_SYS_PARAM_H |
| 22 | #include <sys/param.h> |
| 23 | #endif |
| 24 | |
| 25 | #ifndef MAXPATHLEN |
| 26 | #define MAXPATHLEN 1024 |
| 27 | #endif |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 28 | |
Guido van Rossum | de9775a | 1991-01-21 14:27:52 +0000 | [diff] [blame] | 29 | extern char *getwd(); |
| 30 | |
| 31 | char * |
| 32 | getcwd(buf, size) |
| 33 | char *buf; |
| 34 | int size; |
| 35 | { |
| 36 | char localbuf[MAXPATHLEN+1]; |
| 37 | char *ret; |
| 38 | |
| 39 | if (size <= 0) { |
| 40 | errno = EINVAL; |
| 41 | return NULL; |
| 42 | } |
| 43 | ret = getwd(localbuf); |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 44 | if (ret != NULL && strlen(localbuf) >= (size_t)size) { |
Guido van Rossum | de9775a | 1991-01-21 14:27:52 +0000 | [diff] [blame] | 45 | errno = ERANGE; |
| 46 | return NULL; |
| 47 | } |
| 48 | if (ret == NULL) { |
| 49 | errno = EACCES; /* Most likely error */ |
| 50 | return NULL; |
| 51 | } |
| 52 | strncpy(buf, localbuf, size); |
| 53 | return buf; |
| 54 | } |
| 55 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 56 | #else /* !HAVE_GETWD */ |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 57 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 58 | /* Version for really old UNIX systems -- use pipe from pwd */ |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 59 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 60 | #ifndef PWD_CMD |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 61 | #define PWD_CMD "/bin/pwd" |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 62 | #endif |
Guido van Rossum | 7927384 | 1991-02-19 12:28:18 +0000 | [diff] [blame] | 63 | |
| 64 | char * |
| 65 | getcwd(buf, size) |
| 66 | char *buf; |
| 67 | int size; |
| 68 | { |
| 69 | FILE *fp; |
| 70 | char *p; |
| 71 | int sts; |
| 72 | if (size <= 0) { |
| 73 | errno = EINVAL; |
| 74 | return NULL; |
| 75 | } |
| 76 | if ((fp = popen(PWD_CMD, "r")) == NULL) |
| 77 | return NULL; |
| 78 | if (fgets(buf, size, fp) == NULL || (sts = pclose(fp)) != 0) { |
| 79 | errno = EACCES; /* Most likely error */ |
| 80 | return NULL; |
| 81 | } |
| 82 | for (p = buf; *p != '\n'; p++) { |
| 83 | if (*p == '\0') { |
| 84 | errno = ERANGE; |
| 85 | return NULL; |
| 86 | } |
| 87 | } |
| 88 | *p = '\0'; |
| 89 | return buf; |
| 90 | } |
| 91 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 92 | #endif /* !HAVE_GETWD */ |