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EFUN(3)                    Library Functions Manual                    EFUN(3)

NAME
     esetfunc, easprintf, efopen, emalloc, ecalloc, erealloc, ereallocarr,
     estrdup, estrndup, estrlcat, estrlcpy, estrtoi, estrtou, evasprintf -
     error-checked utility functions

LIBRARY
     System Utilities Library (libutil, -lutil)

SYNOPSIS
     #include <util.h>

     void (*)(int, const char *, ...)
     esetfunc(void (*)(int, const char *, ...));

     int
     easprintf(char ** restrict str, const char * restrict fmt, ...);

     FILE *
     efopen(const char *p, const char *m);

     void *
     ecalloc(size_t n, size_t s);

     void *
     emalloc(size_t n);

     void *
     erealloc(void *p, size_t n);

     void
     ereallocarr(void *p, size_t n, size_t s);

     char *
     estrdup(const char *s);

     char *
     estrndup(const char *s, size_t len);

     size_t
     estrlcat(char *dst, const char *src, size_t len);

     size_t
     estrlcpy(char *dst, const char *src, size_t len);

     intmax_t
     estrtoi(const char * nptr, int base, intmax_t lo, intmax_t hi);

     uintmax_t
     estrtou(const char * nptr, int base, uintmax_t lo, uintmax_t hi);

     int
     evasprintf(char ** restrict str, const char * restrict fmt, ...);

DESCRIPTION
     The easprintf(), efopen(), ecalloc(), emalloc(), erealloc(),
     ereallocarr(), estrdup(), estrndup(), estrlcat(), estrlcpy(), estrtoi(),
     estrtou(), and evasprintf() functions operate exactly as the
     corresponding functions that do not start with an `e' except that in case
     of an error, they call the installed error handler that can be configured
     with esetfunc().

     For the string handling functions, it is an error when the destination
     buffer is not large enough to hold the complete string.  For functions
     that allocate memory or open a file, it is an error when they would
     return a null pointer.  The default error handler is err(3).  The
     function esetfunc() returns the previous error handler function.  A NULL
     error handler will just call exit(3).

SEE ALSO
     asprintf(3), calloc(3), err(3), exit(3), fopen(3), malloc(3), realloc(3),
     reallocarr(3), strdup(3), strlcat(3), strlcpy(3), strndup(3), strtoi(3),
     strtou(3), vasprintf(3)

HISTORY
     The estrtoi(), estrtou() and ereallocarr() functions were added in
     NetBSD 8.

NetBSD 8.0                       July 26, 2015                      NetBSD 8.0