| 1 |
greg |
2.1 |
/* Copyright (c) 1992 Regents of the University of California */ |
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint |
| 4 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
|
|
#endif |
| 6 |
|
|
|
| 7 |
|
|
/* |
| 8 |
|
|
* Get additional command arguments from file or environment. |
| 9 |
|
|
*/ |
| 10 |
|
|
|
| 11 |
|
|
#include "standard.h" |
| 12 |
|
|
|
| 13 |
|
|
#define MAXARGEXP 512 /* maximum argument expansion */ |
| 14 |
|
|
|
| 15 |
|
|
/* set the following to suit, -1 to disable */ |
| 16 |
|
|
int envexpchr = '$'; /* environment expansion character */ |
| 17 |
|
|
int filexpchr = '^'; /* file expansion character */ |
| 18 |
|
|
|
| 19 |
|
|
|
| 20 |
|
|
expandarg(acp, avp, n) /* expand list at argument n */ |
| 21 |
|
|
int *acp; |
| 22 |
|
|
register char ***avp; |
| 23 |
|
|
int n; |
| 24 |
|
|
{ |
| 25 |
|
|
int ace; |
| 26 |
|
|
char *ave[MAXARGEXP]; |
| 27 |
|
|
char **newav; |
| 28 |
|
|
/* check argument */ |
| 29 |
|
|
errno = 0; |
| 30 |
|
|
if ((*avp)[n][0] == filexpchr) { /* file name */ |
| 31 |
|
|
ace = wordfile(ave, (*avp)[n]+1); |
| 32 |
|
|
if (ace < 0) |
| 33 |
|
|
return(-1); /* no such file */ |
| 34 |
|
|
} else if ((*avp)[n][0] == envexpchr) { /* env. variable */ |
| 35 |
|
|
ace = wordstring(ave, getenv((*avp)[n]+1)); |
| 36 |
|
|
if (ace < 0) |
| 37 |
|
|
return(-1); /* no such variable */ |
| 38 |
|
|
} else /* regular argument */ |
| 39 |
|
|
return(0); |
| 40 |
|
|
/* allocate new pointer list */ |
| 41 |
|
|
newav = (char **)bmalloc((*acp+ace)*sizeof(char *)); |
| 42 |
|
|
if (newav == NULL) |
| 43 |
|
|
return(-1); |
| 44 |
|
|
/* copy preceeding arguments */ |
| 45 |
|
|
bcopy((char *)*avp, (char *)newav, n*sizeof(char *)); |
| 46 |
|
|
/* copy expanded argument */ |
| 47 |
|
|
bcopy((char *)ave, (char *)(newav+n), ace*sizeof(char *)); |
| 48 |
|
|
/* copy trailing arguments + NULL */ |
| 49 |
|
|
bcopy((char *)(*avp+n+1), (char *)(newav+n+ace), (*acp-n)*sizeof(char *)); |
| 50 |
|
|
/* free old list */ |
| 51 |
|
|
bfree((char *)*avp, (*acp+1)*sizeof(char *)); |
| 52 |
|
|
/* assign new list */ |
| 53 |
|
|
*acp += ace-1; |
| 54 |
|
|
*avp = newav; |
| 55 |
|
|
return(1); /* return success */ |
| 56 |
|
|
} |
