EFUN(3)

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

LIBRARY
libutil

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.