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Merge "lsof fixes."

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Elliott Hughes 2015-08-25 00:37:49 +00:00 committed by Gerrit Code Review
commit e13fd9aa23
1 changed files with 59 additions and 16 deletions
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75
toolbox/lsof.c
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@ -29,6 +29,7 @@
* SUCH DAMAGE.
*/
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
@ -57,7 +58,7 @@ struct pid_info_t {
static void print_header()
{
printf("%-9s %5s %10s %4s %9s %18s %9s %10s %s\n",
printf("%-9s %5s %10s %4s %9s %18s %9s %10s %s\n",
"COMMAND",
"PID",
"USER",
@ -69,12 +70,12 @@ static void print_header()
"NAME");
}
static void print_type(char *type, struct pid_info_t* info)
static void print_symlink(const char* name, const char* path, struct pid_info_t* info)
{
static ssize_t link_dest_size;
static char link_dest[PATH_MAX];
strlcat(info->path, type, sizeof(info->path));
strlcat(info->path, path, sizeof(info->path));
if ((link_dest_size = readlink(info->path, link_dest, sizeof(link_dest)-1)) < 0) {
if (errno == ENOENT)
goto out;
@ -88,9 +89,53 @@ static void print_type(char *type, struct pid_info_t* info)
if (!strcmp(link_dest, "/"))
goto out;
printf("%-9s %5d %10s %4s %9s %18s %9s %10s %s\n",
info->cmdline, info->pid, info->user, type,
"???", "???", "???", "???", link_dest);
const char* fd = name;
char rw = ' ';
char locks = ' '; // TODO: read /proc/locks
const char* type = "unknown";
char device[32] = "?";
char size_off[32] = "?";
char node[32] = "?";
struct stat sb;
if (lstat(link_dest, &sb) != -1) {
switch ((sb.st_mode & S_IFMT)) {
case S_IFSOCK: type = "sock"; break; // TODO: what domain?
case S_IFLNK: type = "LINK"; break;
case S_IFREG: type = "REG"; break;
case S_IFBLK: type = "BLK"; break;
case S_IFDIR: type = "DIR"; break;
case S_IFCHR: type = "CHR"; break;
case S_IFIFO: type = "FIFO"; break;
}
snprintf(device, sizeof(device), "%d,%d", (int) sb.st_dev, (int) sb.st_rdev);
snprintf(node, sizeof(node), "%d", (int) sb.st_ino);
snprintf(size_off, sizeof(size_off), "%d", (int) sb.st_size);
}
if (!name) {
// We're looking at an fd, so read its flags.
fd = path;
char fdinfo_path[PATH_MAX];
snprintf(fdinfo_path, sizeof(fdinfo_path), "/proc/%d/fdinfo/%s", info->pid, path);
FILE* fp = fopen(fdinfo_path, "r");
if (fp != NULL) {
int pos;
unsigned flags;
if (fscanf(fp, "pos: %d flags: %o", &pos, &flags) == 2) {
flags &= O_ACCMODE;
if (flags == O_RDONLY) rw = 'r';
else if (flags == O_WRONLY) rw = 'w';
else rw = 'u';
}
fclose(fp);
}
}
printf("%-9s %5d %10s %4s%c%c %9s %18s %9s %10s %s\n",
info->cmdline, info->pid, info->user, fd, rw, locks, type, device, size_off, node, link_dest);
out:
info->path[info->parent_length] = '\0';
@ -111,15 +156,14 @@ static void print_maps(struct pid_info_t* info)
if (!maps)
goto out;
while (fscanf(maps, "%*x-%*x %*s %zx %s %ld %s\n", &offset, device, &inode,
file) == 4) {
while (fscanf(maps, "%*x-%*x %*s %zx %s %ld %s\n", &offset, device, &inode, file) == 4) {
// We don't care about non-file maps
if (inode == 0 || !strcmp(device, "00:00"))
continue;
printf("%-9s %5d %10s %4s %9s %18s %9zd %10ld %s\n",
printf("%-9s %5d %10s %4s %9s %18s %9zd %10ld %s\n",
info->cmdline, info->pid, info->user, "mem",
"???", device, offset, inode, file);
"REG", device, offset, inode, file);
}
fclose(maps);
@ -141,7 +185,7 @@ static void print_fds(struct pid_info_t* info)
if (dir == NULL) {
char msg[BUF_MAX];
snprintf(msg, sizeof(msg), "%s (opendir: %s)", info->path, strerror(errno));
printf("%-9s %5d %10s %4s %9s %18s %9s %10s %s\n",
printf("%-9s %5d %10s %4s %9s %18s %9s %10s %s\n",
info->cmdline, info->pid, info->user, "FDS",
"", "", "", "", msg);
goto out;
@ -152,7 +196,7 @@ static void print_fds(struct pid_info_t* info)
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
continue;
print_type(de->d_name, info);
print_symlink(NULL, de->d_name, info);
}
closedir(dir);
@ -207,10 +251,9 @@ static void lsof_dumpinfo(pid_t pid)
strlcpy(info.cmdline, basename(cmdline), sizeof(info.cmdline));
// Read each of these symlinks
print_type("cwd", &info);
print_type("exe", &info);
print_type("root", &info);
print_symlink("cwd", "cwd", &info);
print_symlink("txt", "exe", &info);
print_symlink("rtd", "root", &info);
print_fds(&info);
print_maps(&info);
}