53 lines
1017 B
C
53 lines
1017 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef __NeXT
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/* access macros are not declared in non posix mode in unistd.h -
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don't try to use posix on NeXTstep 3.3 ! */
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#include <libc.h>
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#endif
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#if HAVE_ALLOCA_H
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# include <alloca.h>
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#endif
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#include "findme.h"
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char * findProgramPath(char * argv0) {
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char * path = getenv("PATH");
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char * pathbuf;
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char * start, * chptr;
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char * buf;
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/* If there is a / in the argv[0], it has to be an absolute
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path */
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if (strchr(argv0, '/'))
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return strdup(argv0);
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if (!path) return NULL;
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start = pathbuf = alloca(strlen(path) + 1);
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buf = malloc(strlen(path) + strlen(argv0) + 2);
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strcpy(pathbuf, path);
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chptr = NULL;
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do {
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if ((chptr = strchr(start, ':')))
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*chptr = '\0';
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sprintf(buf, "%s/%s", start, argv0);
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if (!access(buf, X_OK))
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return buf;
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if (chptr)
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start = chptr + 1;
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else
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start = NULL;
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} while (start && *start);
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free(buf);
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return NULL;
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}
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