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/*
* Copyright (C) 2015-2020 "IoT.bzh"
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/prctl.h>
#include "process-name.h"
int process_name_set_name(const char *name)
{
return prctl(PR_SET_NAME, name);
}
int process_name_replace_cmdline(char **argv, const char *name)
{
char *beg, *end, **av, c;
/* update the command line */
av = argv;
if (!av) {
errno = EINVAL;
return -1; /* no command line update required */
}
/* longest prefix */
end = beg = *av;
while (*av)
if (*av++ == end)
while(*end++)
;
if (end == beg) {
errno = EINVAL;
return -1; /* nothing to change */
}
/* patch the command line */
av = &argv[1];
end--;
while (beg != end && (c = *name++)) {
if (c != ' ' || !*av)
*beg++ = c;
else {
*beg++ = 0;
*av++ = beg;
}
}
/* terminate last arg */
if (beg != end)
*beg++ = 0;
/* update remaining args (for keeping initial length correct) */
while (*av)
*av++ = beg;
/* fulfill last arg with spaces */
while (beg != end)
*beg++ = ' ';
*beg = 0;
return 0;
}
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