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EFUN(3)			 BSD Library Functions Manual		       EFUN(3)

NAME
     esetfunc, easprintf, efopen, emalloc, ecalloc, erealloc, estrdup,
     estrndup, estrlcat, estrlcpy, evasprintf — error-checked utility func‐
     tions

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 c);

     void *
     emalloc(size_t n);

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

     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);

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

DESCRIPTION
     The easprintf(), efopen(), ecalloc(), emalloc(), erealloc(), estrdup(),
     estrndup(), estrlcat(), estrlcpy(), 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 func‐
     tion 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),
     strdup(3), strlcat(3), strlcpy(3), strndup(3), vasprintf(3)

BSD				  May 3, 2010				   BSD

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