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/*
* Copyright 2010-2016, Tarantool AUTHORS, please see AUTHORS file.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "title.h"
#include "proc_title.h"
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
static char *title_buf;
size_t title_buf_size;
static char *interpretor_name;
static char *script_name;
static char *custom;
static char *status;
char **title_init(int argc, char **argv)
{
char **argv_copy = proc_title_init(argc, argv);
if (argv_copy == NULL)
return NULL;
title_buf_size = proc_title_max_length();
title_buf = malloc(title_buf_size);
/* ensure title_get() always yields a valid string */
if (title_buf != NULL && title_buf_size != 0)
title_buf[0] = '\0';
title_set_interpretor_name(argv[0]);
return argv_copy;
}
void title_free(int argc, char **argv)
{
free(title_buf); title_buf = NULL;
free(script_name); script_name = NULL;
free(custom); custom = NULL;
free(status); status = NULL;
proc_title_free(argc, argv);
}
const char *title_get(void)
{
return title_buf;
}
/**
* Return a name without preceding path, e.g. /a/b/c -> c.
* Like basename(), but doesn't modify the subject string.
* Unlike basename, returns an empty string for directories
* /a/b/c/
*/
static const char *
my_basename(const char *name)
{
const char *sep = NULL;
const char *p;
if (name == NULL)
return NULL;
for (p = name; *p != '\0'; p++) {
if (*p == '/')
sep = p;
}
if (sep)
return sep[1] ? sep + 1 : NULL;
return name;
}
void title_update(void)
{
if (title_buf == NULL || title_buf_size == 0)
return;
char *output = title_buf;
char *output_end = title_buf + title_buf_size;
int rc;
const char *script_name_short = my_basename(script_name);
const char *interpretor_name_short = my_basename(interpretor_name);
const char *part1 = "tarantool", *part2 = NULL, *part3 = status;
/*
* prefix
*/
if (script_name_short == NULL) {
if (interpretor_name_short != NULL) {
part1 = interpretor_name_short;
}
} else if (interpretor_name_short == NULL) {
part1 = script_name_short;
} else {
assert(script_name_short);
assert(interpretor_name_short);
part1 = script_name_short;
/*
* Omit interpretor name when it is the prefix of
* scriptname, ex: tarantool/tarantoolctl
*/
if (strncmp(script_name_short, interpretor_name_short,
strlen(interpretor_name_short)) == 0) {
part1 = script_name_short;
} else {
part1 = interpretor_name_short;
part2 = script_name_short;
}
}
#define OUTPUT(...) snprintf(output, output_end - output, __VA_ARGS__)
assert(part1);
if (part2) {
if (part3) {
rc = OUTPUT("%s %s <%s>", part1, part2, part3);
} else {
rc = OUTPUT("%s %s", part1, part2);
}
} else {
if (part3) {
rc = OUTPUT("%s <%s>", part1, part3);
} else {
rc = OUTPUT("%s", part1);
}
}
if (rc < 0 || (output += rc) >= output_end)
goto done;
/*
* custom title
*/
if (custom) {
rc = OUTPUT(": %s", custom);
if (rc < 0 || (output += rc) >= output_end)
goto done;
}
#undef OUTPUT
done:
if (output >= output_end) {
output = output_end - 1;
}
/*
* failed snprintf leaves the buffer in unspecified state hence
* explicit NUL termination
*/
*output = '\0';
proc_title_set("%s", title_buf);
}
#define DEFINE_STRING_ACCESSORS(name) \
const char *title_get_ ## name() { return name; } \
void title_set_ ## name(const char *str) \
{ \
if (str == NULL || str[0] == '\0') { \
free(name); name = NULL; \
return; \
} \
size_t len = strlen(str); \
char *p = realloc(name, len + 1); \
if (p) { \
name = memcpy(p, str, len + 1); \
} \
}
DEFINE_STRING_ACCESSORS(interpretor_name)
DEFINE_STRING_ACCESSORS(script_name)
DEFINE_STRING_ACCESSORS(custom)
DEFINE_STRING_ACCESSORS(status)
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