limits.h

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/* Runtime invariant values (Possibly indeterminate) */
#define NGROUPS_MAX    65536    /* supplemental group IDs are available */
#define RTSIG_MAX         32
#define _PAGESIZE       4096
#define PAGESIZE _PAGESIZE
#define PAGE_SIZE _PAGESIZE

/* Pathname Variable Values */

/* Runtime Increasable Values */

/* Maximum Values */

/* Minimum Values */
#define ARG_MAX       131072    /* # bytes of args + environ for exec() */
#define LINK_MAX         127    /* # links a file may have */
#define MAX_CANON        255    /* size of the canonical input queue */
#define MAX_INPUT        255    /* size of the type-ahead buffer */
#define NAME_MAX         255    /* # chars in a file name */
#define PATH_MAX        4096    /* # chars in a path name including nul */
#define PIPE_BUF        4096    /* # bytes in atomic write to a pipe */

/* Numerical Limits */

/* Other Invariant Values */

/* End of a file */