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init-rdahead/init-rdahead.c
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Matthew Johnson 5164dee394 Add GPL v3 header to init-rdahead.c 
Signed-off-by: Matthew Johnson <matthew.johnson@intel.com>
2016-08-15 23:05:29 +00:00

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/* This file is part of the init-rdahead project
*
* Copyright (C) 2016 Intel Corporation
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#ifdef DEBUG
#include <stdio.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#define DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__ );
#else
#define DEBUG_PRINT(...)
#endif
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NULL
};
int main(void)
{
int i, fd;
struct stat st;
pid_t pid = fork();
if (pid == -1) {
DEBUG_PRINT("fork failed\n");
execl("/usr/lib/systemd/systemd-bootchart", "systemd-bootchart", NULL);
} else if (pid > 0 ) {
execl("/usr/lib/systemd/systemd-bootchart", "systemd-bootchart", NULL);
} else {
usleep(10000);
DEBUG_PRINT("readahead files:\n");
for (i = 0; ra_fns[i]; i++) {
DEBUG_PRINT("%s\n", ra_fns[i]);
fd = open(ra_fns[i], O_RDONLY);
if (fd < 0) {
DEBUG_PRINT("open failed to open %s\n", ra_fns[i]);
continue;
}
if (fstat(fd, &st) < 0) {
DEBUG_PRINT("fstat failed on %s\n", ra_fns[i]);
close(fd);
continue;
}
if (readahead(fd, 0, st.st_size) < 0) {
DEBUG_PRINT("readahead failure on %s: %s\n", ra_fns[i], strerror(errno));
}
close(fd);
}
}
return 0;
}
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