| Revision 12455,
1.2 KB
checked in by danw, 26 years ago
(diff) |
|
This commit was generated by cvs2svn to compensate for changes in r12454,
which included commits to RCS files with non-trunk default branches.
|
| Line | |
|---|
| 1 | |
|---|
| 2 | /* |
|---|
| 3 | * putenv.c -- (un)set an envariable |
|---|
| 4 | * |
|---|
| 5 | * $Id: putenv.c,v 1.1.1.1 1999-02-07 18:14:09 danw Exp $ |
|---|
| 6 | */ |
|---|
| 7 | |
|---|
| 8 | #include <h/mh.h> |
|---|
| 9 | |
|---|
| 10 | extern char **environ; |
|---|
| 11 | |
|---|
| 12 | /* |
|---|
| 13 | * prototypes |
|---|
| 14 | */ |
|---|
| 15 | int m_putenv (char *, char *); |
|---|
| 16 | int unputenv (char *); |
|---|
| 17 | static int nvmatch (char *, char *); |
|---|
| 18 | |
|---|
| 19 | |
|---|
| 20 | int |
|---|
| 21 | m_putenv (char *name, char *value) |
|---|
| 22 | { |
|---|
| 23 | register int i; |
|---|
| 24 | register char **ep, **nep, *cp; |
|---|
| 25 | |
|---|
| 26 | if (!(cp = malloc ((size_t) (strlen (name) + strlen (value) + 2)))) |
|---|
| 27 | return 1; |
|---|
| 28 | |
|---|
| 29 | sprintf (cp, "%s=%s", name, value); |
|---|
| 30 | |
|---|
| 31 | for (ep = environ, i = 0; *ep; ep++, i++) |
|---|
| 32 | if (nvmatch (name, *ep)) { |
|---|
| 33 | *ep = cp; |
|---|
| 34 | return 0; |
|---|
| 35 | } |
|---|
| 36 | |
|---|
| 37 | if (!(nep = (char **) malloc ((size_t) ((i + 2) * sizeof(*nep))))) |
|---|
| 38 | return 1; |
|---|
| 39 | |
|---|
| 40 | for (ep = environ, i = 0; *ep; nep[i++] = *ep++) |
|---|
| 41 | continue; |
|---|
| 42 | nep[i++] = cp; |
|---|
| 43 | nep[i] = NULL; |
|---|
| 44 | environ = nep; |
|---|
| 45 | return 0; |
|---|
| 46 | } |
|---|
| 47 | |
|---|
| 48 | |
|---|
| 49 | int |
|---|
| 50 | unputenv (char *name) |
|---|
| 51 | { |
|---|
| 52 | char **ep, **nep; |
|---|
| 53 | |
|---|
| 54 | for (ep = environ; *ep; ep++) |
|---|
| 55 | if (nvmatch (name, *ep)) |
|---|
| 56 | break; |
|---|
| 57 | if (*ep == NULL) |
|---|
| 58 | return 1; |
|---|
| 59 | |
|---|
| 60 | for (nep = ep + 1; *nep; nep++) |
|---|
| 61 | continue; |
|---|
| 62 | *ep = *--nep; |
|---|
| 63 | *nep = NULL; |
|---|
| 64 | return 0; |
|---|
| 65 | } |
|---|
| 66 | |
|---|
| 67 | |
|---|
| 68 | static int |
|---|
| 69 | nvmatch (char *s1, char *s2) |
|---|
| 70 | { |
|---|
| 71 | while (*s1 == *s2++) |
|---|
| 72 | if (*s1++ == '=') |
|---|
| 73 | return 1; |
|---|
| 74 | |
|---|
| 75 | return (*s1 == '\0' && *--s2 == '='); |
|---|
| 76 | } |
|---|
Note: See
TracBrowser
for help on using the repository browser.
