DOKK / manpages / debian 11 / libtraceevent-doc / tep_strerror.3.en
LIBTRACEEVENT(3) libtraceevent Manual LIBTRACEEVENT(3)

tep_strerror - Returns a string describing regular errno and tep error number.

#include <event-parse.h>
int tep_strerror(struct tep_handle *tep, enum tep_errno errnum, char *buf, size_t buflen);

The tep_strerror() function converts tep error number into a human readable string. The tep argument is trace event parser context. The errnum is a regular errno, defined in errno.h, or a tep error number. The string, describing this error number is copied in the buf argument. The buflen argument is the size of the buf.

It as a thread safe wrapper around strerror_r(). The library function has two different behaviors - POSIX and GNU specific. The tep_strerror() API always behaves as the POSIX version - the error string is copied in the user supplied buffer.

The tep_strerror() function returns 0, if a valid errnum is passed and the string is copied into buf. If errnum is not a valid error number, -1 is returned and buf is not modified.

#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
char buf[32];
char *pool = calloc(1, 128);
if (tep == NULL) {

tep_strerror(tep, TEP_ERRNO__MEM_ALLOC_FAILED, buf, 32);
printf ("The pool is not initialized, %s", buf); } ...

event-parse.h

Header file to include in order to have access to the library APIs. -ltraceevent
Linker switch to add when building a program that uses the library.

libtraceevent(3), trace-cmd(1)

Steven Rostedt <rostedt@goodmis.org[1]>, author of libtraceevent.
Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.

Report bugs to <linux-trace-devel@vger.kernel.org[3]>

libtraceevent is Free Software licensed under the GNU LGPL 2.1

https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/

1.
rostedt@goodmis.org
mailto:rostedt@goodmis.org
2.
tz.stoyanov@gmail.com
mailto:tz.stoyanov@gmail.com
3.
linux-trace-devel@vger.kernel.org
mailto:linux-trace-devel@vger.kernel.org
02/15/2021 libtraceevent 1.1.2