30 lines
869 B
C
30 lines
869 B
C
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#include "utils.h"
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#include <stdlib.h>
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#include <string.h>
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/*=========================================================================*
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* env_prefix *
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*=========================================================================*/
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PUBLIC int env_prefix(env, prefix)
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char *env; /* environment variable to inspect */
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char *prefix; /* prefix to test for */
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{
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/* An environment setting may be prefixed by a word, usually "pci".
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* Return TRUE if a given prefix is used.
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*/
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char value[EP_BUF_SIZE];
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char punct[] = ":,;.";
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int s;
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size_t n;
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if ((s = sys_getkenv(env, strlen(env), value, sizeof(value))) != 0) {
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if (s != ESRCH) /* only error allowed */
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printf("WARNING: sys_getkenv() failed in env_prefix(): %d\n", s);
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}
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n = strlen(prefix);
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return(value != NULL
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&& strncmp(value, prefix, n) == 0
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&& strchr(punct, value[n]) != NULL);
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}
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