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/*
* Reads /proc/self/psinfo such that it can be tested whether Valgrind
* intercepts the system calls that access this pseudo-file.
*/
#include <fcntl.h>
#include <limits.h>
#include <procfs.h>
#include <stdio.h>
#include <unistd.h>
static void test_psinfo(int op, const char *label,
const char *path)
{
int fd;
if (op == 0) {
printf("open for %s:\n", label);
fd = open(path, O_RDONLY);
if (fd < 0) {
perror("open");
return;
}
} else {
printf("openat for %s:\n", label);
fd = openat(AT_FDCWD, path, O_RDONLY);
if (fd < 0) {
perror("openat");
return;
}
}
psinfo_t psinfo;
ssize_t bytes = read(fd, &psinfo, sizeof(psinfo));
if (bytes != sizeof(psinfo)) {
perror("read");
return;
}
printf("fname: %s\n", psinfo.pr_fname);
printf("psargs: %s\n", psinfo.pr_psargs);
printf("argc: %d\n", psinfo.pr_argc);
unsigned int i;
char **argv = (char **) psinfo.pr_argv;
for (i = 0; i < psinfo.pr_argc; i++) {
printf("argv[%u]: %s\n", i, argv[i]);
}
close(fd);
}
int main(int argc, const char *argv[])
{
char path[PATH_MAX];
snprintf(path, sizeof(path), "/proc/%ld/psinfo", (long int) getpid());
test_psinfo(0, "/proc/self/psinfo", "/proc/self/psinfo");
printf("\n");
test_psinfo(0, "/proc/<pid>/psinfo", path);
printf("\n");
test_psinfo(1, "/proc/self/psinfo", "/proc/self/psinfo");
printf("\n");
test_psinfo(1, "/proc/<pid>/psinfo", path);
return 0;
}
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