V7/usr/src/libc/stdio/getpwnam.c

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including files from this version of Unix. 
#include <pwd.h>

struct passwd *
getpwnam(name)
char *name;
{
	register struct passwd *p;
	struct passwd *getpwent();

	setpwent();
	while( (p = getpwent()) && strcmp(name,p->pw_name) );
	endpwent();
	return(p);
}