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meminfo: Add process command line to the output

This commit is contained in:
Bananymous 2023-09-30 23:17:31 +03:00
parent b712c70c75
commit f0b6844feb
1 changed files with 54 additions and 18 deletions
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72
userspace/meminfo/main.cpp
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@ -30,28 +30,64 @@ int main()
if (!is_only_digits(proc_ent->d_name)) if (!is_only_digits(proc_ent->d_name))
continue; continue;
strcpy(path_buffer, proc_ent->d_name); printf("process: ");
strcat(path_buffer, "/meminfo");
int fd = openat(dirfd(proc), path_buffer, O_RDONLY);
if (fd == -1)
{ {
perror("openat"); strcpy(path_buffer, proc_ent->d_name);
continue; strcat(path_buffer, "/cmdline");
int fd = openat(dirfd(proc), path_buffer, O_RDONLY);
if (fd == -1)
{
perror("openat");
continue;
}
while (ssize_t nread = read(fd, path_buffer, sizeof(path_buffer) - 1))
{
if (nread == -1)
{
perror("read");
break;
}
for (int i = 0; i < nread; i++)
if (path_buffer[i] == '\0')
path_buffer[i] = ' ';
path_buffer[nread] = '\0';
int written = 0;
while (written < nread)
written += printf("%s ", path_buffer + written);
}
close(fd);
} }
proc_meminfo_t meminfo; printf("\n pid: %s\n", proc_ent->d_name);
if (read(fd, &meminfo, sizeof(meminfo)) == -1)
perror("read");
else
{
printf("process:\n");
printf(" pid: %s\n", proc_ent->d_name);
printf(" vmem: %zu pages (%zu bytes)\n", meminfo.virt_pages, meminfo.page_size * meminfo.virt_pages);
printf(" pmem: %zu pages (%zu bytes)\n", meminfo.phys_pages, meminfo.page_size * meminfo.phys_pages);
}
close(fd); {
strcpy(path_buffer, proc_ent->d_name);
strcat(path_buffer, "/meminfo");
int fd = openat(dirfd(proc), path_buffer, O_RDONLY);
if (fd == -1)
{
perror("openat");
continue;
}
proc_meminfo_t meminfo;
if (read(fd, &meminfo, sizeof(meminfo)) == -1)
perror("read");
else
{
printf(" vmem: %zu pages (%zu bytes)\n", meminfo.virt_pages, meminfo.page_size * meminfo.virt_pages);
printf(" pmem: %zu pages (%zu bytes)\n", meminfo.phys_pages, meminfo.page_size * meminfo.phys_pages);
}
close(fd);
}
} }
closedir(proc); closedir(proc);