Stress-ng:使用 execv 编写应用程序来调用 stress-ng 命令,如果成功或失败 return
Stress-ng: Writing an application program using execv to invoke stress-ng commands and return if it is success or failure
Stress-ng:如何使用 execv 在 C 或 Cpp 中编写应用程序以调用 stress-ng 命令 CPU 和 MIPS 中的内存测试以及 return 如果成功则其状态还是失败?
给定一个可执行的 stress-ng 文件,该文件已使用其工具链交叉编译为 MIPS32 版本。
示例 stress-ng 命令:
stress-ng --vm 8 --vm-bytes 80% -t 1h
stress-ng --cpu 8 --cpu-ops 800000
也许这就足够了:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(void)
{
pid_t pid;
int ret;
char *stress_ng = "/usr/bin/stress-ng";
char *argv_new[] = { stress_ng,
"--vm", "8", "--vm-bytes", "80%",
"-t", "2s", "-v", NULL };
char *env_new[] = { NULL };
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
} else if (pid == 0) {
ret = execve(stress_ng, argv_new, env_new);
if (ret < 0) {
fprintf(stderr, "execve failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
_exit(ret);
} else {
/* Parent */
int status;
ret = waitpid(pid, &status, 0);
if (ret < 0) {
fprintf(stderr, "waitpid failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
ret = WEXITSTATUS(status);
printf("stress-ng returned: %d\n", ret);
}
exit(0);
}
如果你想解析 stress-ng 的输出,你需要在父子之间创建一个管道,父需要通过管道读取和解析输出,如下所示:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(void)
{
pid_t pid;
int ret;
int fds[2];
char *stress_ng = "/usr/bin/stress-ng";
char *argv_new[] = { stress_ng,
"--vm", "8", "--vm-bytes", "80%",
"-t", "2s", "-v", NULL };
char *env_new[] = { NULL };
if (pipe(fds) < 0) {
fprintf(stderr, "pipe failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
} else if (pid == 0) {
//close(STDERR_FILENO);
close(STDIN_FILENO);
close(fds[0]);
dup2(fds[1], STDOUT_FILENO);
dup2(fds[1], STDERR_FILENO);
ret = execve(stress_ng, argv_new, env_new);
if (ret < 0) {
fprintf(stderr, "execve failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
close(fds[1]);
_exit(ret);
} else {
/* Parent */
int status;
FILE *fp;
char buffer[1024];
close(fds[1]);
fp = fdopen(fds[0], "r");
if (!fp) {
fprintf(stderr, "fdopen failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
while (fgets(buffer, sizeof(buffer), fp)) {
size_t len = strlen(buffer);
if (len > 0)
buffer[len - 1] = '[=10=]';
if (strstr(buffer, "completed"))
printf("GOT: <%s>\n", buffer);
}
fclose(fp);
close(fds[0]);
ret = waitpid(pid, &status, 0);
if (ret < 0) {
fprintf(stderr, "waitpid failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
ret = WEXITSTATUS(status);
printf("stress-ng returned: %d\n", ret);
}
exit(0);
}
Stress-ng:如何使用 execv 在 C 或 Cpp 中编写应用程序以调用 stress-ng 命令 CPU 和 MIPS 中的内存测试以及 return 如果成功则其状态还是失败? 给定一个可执行的 stress-ng 文件,该文件已使用其工具链交叉编译为 MIPS32 版本。
示例 stress-ng 命令:
stress-ng --vm 8 --vm-bytes 80% -t 1h
stress-ng --cpu 8 --cpu-ops 800000
也许这就足够了:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(void)
{
pid_t pid;
int ret;
char *stress_ng = "/usr/bin/stress-ng";
char *argv_new[] = { stress_ng,
"--vm", "8", "--vm-bytes", "80%",
"-t", "2s", "-v", NULL };
char *env_new[] = { NULL };
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
} else if (pid == 0) {
ret = execve(stress_ng, argv_new, env_new);
if (ret < 0) {
fprintf(stderr, "execve failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
_exit(ret);
} else {
/* Parent */
int status;
ret = waitpid(pid, &status, 0);
if (ret < 0) {
fprintf(stderr, "waitpid failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
ret = WEXITSTATUS(status);
printf("stress-ng returned: %d\n", ret);
}
exit(0);
}
如果你想解析 stress-ng 的输出,你需要在父子之间创建一个管道,父需要通过管道读取和解析输出,如下所示:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(void)
{
pid_t pid;
int ret;
int fds[2];
char *stress_ng = "/usr/bin/stress-ng";
char *argv_new[] = { stress_ng,
"--vm", "8", "--vm-bytes", "80%",
"-t", "2s", "-v", NULL };
char *env_new[] = { NULL };
if (pipe(fds) < 0) {
fprintf(stderr, "pipe failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
} else if (pid == 0) {
//close(STDERR_FILENO);
close(STDIN_FILENO);
close(fds[0]);
dup2(fds[1], STDOUT_FILENO);
dup2(fds[1], STDERR_FILENO);
ret = execve(stress_ng, argv_new, env_new);
if (ret < 0) {
fprintf(stderr, "execve failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
close(fds[1]);
_exit(ret);
} else {
/* Parent */
int status;
FILE *fp;
char buffer[1024];
close(fds[1]);
fp = fdopen(fds[0], "r");
if (!fp) {
fprintf(stderr, "fdopen failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
while (fgets(buffer, sizeof(buffer), fp)) {
size_t len = strlen(buffer);
if (len > 0)
buffer[len - 1] = '[=10=]';
if (strstr(buffer, "completed"))
printf("GOT: <%s>\n", buffer);
}
fclose(fp);
close(fds[0]);
ret = waitpid(pid, &status, 0);
if (ret < 0) {
fprintf(stderr, "waitpid failed: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
ret = WEXITSTATUS(status);
printf("stress-ng returned: %d\n", ret);
}
exit(0);
}