73 lines
1.2 KiB
C
73 lines
1.2 KiB
C
/*
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(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/*
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Module: Access to program arguments and environment
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Author: Ceriel J.H. Jacobs
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Version: $Header$
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*/
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extern char **argv, ***_penviron;
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extern int argc;
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unsigned int _Arguments__Argc;
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static char *
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findname(s1, s2)
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register char *s1, *s2;
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{
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while (*s1 == *s2++) s1++;
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if (*s1 == '\0' && *(s2-1) == '=') return s2;
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return 0;
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}
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static unsigned int
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scopy(src, dst, max)
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register char *src, *dst;
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unsigned int max;
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{
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register unsigned int i = 0;
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while (*src && i <= max) {
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i++;
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*dst++ = *src++;
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}
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if (i <= max) {
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*dst = '\0';
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return i+1;
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}
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while (*src++) i++;
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return i + 1;
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}
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_Arguments_()
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{
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_Arguments__Argc = argc;
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}
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unsigned
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_Arguments__Argv(n, argument, l, u, s)
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unsigned int u;
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char *argument;
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{
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if (n >= argc) return 0;
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return scopy(argv[n], argument, u);
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}
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unsigned
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_Arguments__GetEnv(name, nn, nu, ns, value, l, u, s)
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char *name, *value;
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unsigned int nu, u;
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{
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register char **p = *_penviron;
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register char *v = 0;
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while (*p && !(v = findname(name, *p++))) {
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/* nothing */
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}
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if (!v) return 0;
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return scopy(v, value, u);
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}
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