50 lines
881 B
C
50 lines
881 B
C
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#include "f2c.h"
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/*
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* getenv - f77 subroutine to return environment variables
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*
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* called by:
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* call getenv (ENV_NAME, char_var)
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* where:
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* ENV_NAME is the name of an environment variable
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* char_var is a character variable which will receive
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* the current value of ENV_NAME, or all blanks
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* if ENV_NAME is not defined
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*/
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VOID getenv_(fname, value, flen, vlen)
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char *value, *fname;
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long int vlen, flen;
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{
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extern char **environ;
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register char *ep, *fp, *flast;
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register char **env = environ;
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flast = fname + flen;
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for(fp = fname ; fp < flast ; ++fp)
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if(*fp == ' ')
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{
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flast = fp;
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break;
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}
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while (ep = *env++)
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{
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for(fp = fname; fp<flast ; )
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if(*fp++ != *ep++)
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goto endloop;
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if(*ep++ == '=') { /* copy right hand side */
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while( *ep && --vlen>=0 )
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*value++ = *ep++;
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goto blank;
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}
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endloop: ;
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}
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blank:
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while( --vlen >= 0 )
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*value++ = ' ';
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}
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