[unix-history] / usr / src / contrib / rc-1.4 / open.c

/* open.c: to insulate <fcntl.h> from the rest of rc. */

#include <fcntl.h>
#include "rc.h"

/* prototype for open() follows. comment out if necessary */

/*extern int open(const char *, int,...);*/

/*
   Opens a file with the necessary flags. Assumes the following
   declaration for redirtype:

	enum redirtype {
		rFrom, rCreate, rAppend, rHeredoc, rHerestring
	};
*/

static const int mode_masks[] = {
	/* rFrom */	O_RDONLY,
	/* rCreate */	O_TRUNC | O_CREAT | O_WRONLY,
	/* rAppend */	O_APPEND | O_CREAT | O_WRONLY
};

extern int rc_open(const char *name, redirtype m) {
	if ((unsigned) m >= arraysize(mode_masks))
		panic("bad mode passed to rc_open");
	return open(name, mode_masks[m], 0666);
}
Commit	Line	Data
9d25673b C	1	/* open.c: to insulate <fcntl.h> from the rest of rc. */
	2
	3	#include <fcntl.h>
	4	#include "rc.h"
	5
	6	/* prototype for open() follows. comment out if necessary */
	7
	8	/extern int open(const char , int,...);*/
	9
	10	/*
	11	Opens a file with the necessary flags. Assumes the following
	12	declaration for redirtype:
	13
	14	enum redirtype {
	15	rFrom, rCreate, rAppend, rHeredoc, rHerestring
	16	};
	17	*/
	18
	19	static const int mode_masks[] = {
	20	/* rFrom */ O_RDONLY,
	21	/* rCreate */ O_TRUNC \| O_CREAT \| O_WRONLY,
	22	/* rAppend */ O_APPEND \| O_CREAT \| O_WRONLY
	23	};
	24
	25	extern int rc_open(const char *name, redirtype m) {
	26	if ((unsigned) m >= arraysize(mode_masks))
	27	panic("bad mode passed to rc_open");
	28	return open(name, mode_masks[m], 0666);
	29	}