*
* Copyright 2004 Tony J. White
*
- * May be distributed under the conditions of the
- * GNU Library General Public License
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
+//usage:#define fuser_trivial_usage
+//usage: "[OPTIONS] FILE or PORT/PROTO"
+//usage:#define fuser_full_usage "\n\n"
+//usage: "Find processes which use FILEs or PORTs\n"
+//usage: "\nOptions:"
+//usage: "\n -m Find processes which use same fs as FILEs"
+//usage: "\n -4,-6 Search only IPv4/IPv6 space"
+//usage: "\n -s Don't display PIDs"
+//usage: "\n -k Kill found processes"
+//usage: "\n -SIGNAL Signal to send (default: KILL)"
+
#include "libbb.h"
#define MAX_LINE 255
pid_t pid;
} pid_list;
-static dev_t find_socket_dev(void)
-{
- int fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (fd >= 0) {
- struct stat buf;
- int r = fstat(fd, &buf);
- close(fd);
- if (r == 0)
- return buf.st_dev;
- }
- return 0;
-}
-static int file_to_dev_inode(const char *filename, dev_t *dev, ino_t *inode)
-{
- struct stat f_stat;
- if (stat(filename, &f_stat))
- return 0;
- *inode = f_stat.st_ino;
- *dev = f_stat.st_dev;
- return 1;
-}
+struct globals {
+ pid_list *pid_list_head;
+ inode_list *inode_list_head;
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define INIT_G() do { } while (0)
-static char *parse_net_arg(const char *arg, unsigned *port)
-{
- char path[12], tproto[5];
-
- if (sscanf(arg, "%u/%4s", port, tproto) != 2)
- return NULL;
- sprintf(path, "net/%s", tproto);
- if (access(path, R_OK) != 0)
- return NULL;
- return xstrdup(tproto);
-}
-static pid_list *add_pid(pid_list *plist, pid_t pid)
+static void add_pid(const pid_t pid)
{
- pid_list *curr = plist;
- while (curr != NULL) {
- if (curr->pid == pid)
- return plist;
- curr = curr->next;
+ pid_list **curr = &G.pid_list_head;
+
+ while (*curr) {
+ if ((*curr)->pid == pid)
+ return;
+ curr = &(*curr)->next;
}
- curr = xmalloc(sizeof(pid_list));
- curr->pid = pid;
- curr->next = plist;
- return curr;
+
+ *curr = xzalloc(sizeof(pid_list));
+ (*curr)->pid = pid;
}
-static inode_list *add_inode(inode_list *ilist, dev_t dev, ino_t inode)
+static void add_inode(const struct stat *st)
{
- inode_list *curr = ilist;
- while (curr != NULL) {
- if (curr->inode == inode && curr->dev == dev)
- return ilist;
- curr = curr->next;
+ inode_list **curr = &G.inode_list_head;
+
+ while (*curr) {
+ if ((*curr)->dev == st->st_dev
+ && (*curr)->inode == st->st_ino
+ ) {
+ return;
+ }
+ curr = &(*curr)->next;
}
- curr = xmalloc(sizeof(inode_list));
- curr->dev = dev;
- curr->inode = inode;
- curr->next = ilist;
- return curr;
+
+ *curr = xzalloc(sizeof(inode_list));
+ (*curr)->dev = st->st_dev;
+ (*curr)->inode = st->st_ino;
}
-static inode_list *scan_proc_net(const char *proto,
- unsigned port, inode_list *ilist)
+static void scan_proc_net(const char *path, unsigned port)
{
- char path[12], line[MAX_LINE + 1];
- char addr[128];
- ino_t tmp_inode;
- dev_t tmp_dev;
+ char line[MAX_LINE + 1];
long long uint64_inode;
unsigned tmp_port;
FILE *f;
+ struct stat st;
+ int fd;
- tmp_dev = find_socket_dev();
+ /* find socket dev */
+ st.st_dev = 0;
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd >= 0) {
+ fstat(fd, &st);
+ close(fd);
+ }
- sprintf(path, "net/%s", proto);
- f = fopen(path, "r");
+ f = fopen_for_read(path);
if (!f)
- return ilist;
+ return;
while (fgets(line, MAX_LINE, f)) {
+ char addr[68];
if (sscanf(line, "%*d: %64[0-9A-Fa-f]:%x %*x:%*x %*x %*x:%*x "
"%*x:%*x %*x %*d %*d %llu",
addr, &tmp_port, &uint64_inode) == 3
) {
- if (strlen(addr) == 8 && (option_mask32 & OPT_IP6))
+ int len = strlen(addr);
+ if (len == 8 && (option_mask32 & OPT_IP6))
continue;
- if (strlen(addr) > 8 && (option_mask32 & OPT_IP4))
+ if (len > 8 && (option_mask32 & OPT_IP4))
continue;
if (tmp_port == port) {
- tmp_inode = uint64_inode;
- ilist = add_inode(ilist, tmp_dev, tmp_inode);
+ st.st_ino = uint64_inode;
+ add_inode(&st);
}
}
}
fclose(f);
- return ilist;
}
-static int search_dev_inode(inode_list *ilist, dev_t dev, ino_t inode)
+static int search_dev_inode(const struct stat *st)
{
+ inode_list *ilist = G.inode_list_head;
+
while (ilist) {
- if (ilist->dev == dev) {
+ if (ilist->dev == st->st_dev) {
if (option_mask32 & OPT_MOUNT)
return 1;
- if (ilist->inode == inode)
+ if (ilist->inode == st->st_ino)
return 1;
}
ilist = ilist->next;
return 0;
}
-static pid_list *scan_pid_maps(const char *fname, pid_t pid,
- inode_list *ilist, pid_list *plist)
+static void scan_pid_maps(const char *fname, pid_t pid)
{
FILE *file;
char line[MAX_LINE + 1];
int major, minor;
- ino_t inode;
long long uint64_inode;
- dev_t dev;
+ struct stat st;
- file = fopen(fname, "r");
+ file = fopen_for_read(fname);
if (!file)
- return plist;
+ return;
+
while (fgets(line, MAX_LINE, file)) {
if (sscanf(line, "%*s %*s %*s %x:%x %llu", &major, &minor, &uint64_inode) != 3)
continue;
- inode = uint64_inode;
- if (major == 0 && minor == 0 && inode == 0)
+ st.st_ino = uint64_inode;
+ if (major == 0 && minor == 0 && st.st_ino == 0)
continue;
- dev = makedev(major, minor);
- if (search_dev_inode(ilist, dev, inode))
- plist = add_pid(plist, pid);
+ st.st_dev = makedev(major, minor);
+ if (search_dev_inode(&st))
+ add_pid(pid);
}
fclose(file);
- return plist;
}
-static pid_list *scan_link(const char *lname, pid_t pid,
- inode_list *ilist, pid_list *plist)
+static void scan_link(const char *lname, pid_t pid)
{
- ino_t inode;
- dev_t dev;
+ struct stat st;
- if (!file_to_dev_inode(lname, &dev, &inode))
- return plist;
- if (search_dev_inode(ilist, dev, inode))
- plist = add_pid(plist, pid);
- return plist;
+ if (stat(lname, &st) >= 0) {
+ if (search_dev_inode(&st))
+ add_pid(pid);
+ }
}
-static pid_list *scan_dir_links(const char *dname, pid_t pid,
- inode_list *ilist, pid_list *plist)
+static void scan_dir_links(const char *dname, pid_t pid)
{
DIR *d;
struct dirent *de;
d = opendir(dname);
if (!d)
- return plist;
+ return;
+
while ((de = readdir(d)) != NULL) {
lname = concat_subpath_file(dname, de->d_name);
if (lname == NULL)
continue;
- plist = scan_link(lname, pid, ilist, plist);
+ scan_link(lname, pid);
free(lname);
}
closedir(d);
- return plist;
}
-static pid_list *scan_proc_pids(inode_list *ilist)
+/* NB: does chdir internally */
+static void scan_proc_pids(void)
{
DIR *d;
struct dirent *de;
pid_t pid;
- pid_list *plist;
- d = opendir(".");
+ xchdir("/proc");
+ d = opendir("/proc");
if (!d)
- return NULL;
+ return;
- plist = NULL;
while ((de = readdir(d)) != NULL) {
pid = (pid_t)bb_strtou(de->d_name, NULL, 10);
if (errno)
continue;
if (chdir(de->d_name) < 0)
continue;
- plist = scan_link("cwd", pid, ilist, plist);
- plist = scan_link("exe", pid, ilist, plist);
- plist = scan_link("root", pid, ilist, plist);
- plist = scan_dir_links("fd", pid, ilist, plist);
- plist = scan_dir_links("lib", pid, ilist, plist);
- plist = scan_dir_links("mmap", pid, ilist, plist);
- plist = scan_pid_maps("maps", pid, ilist, plist);
- xchdir("/proc");
- }
- closedir(d);
- return plist;
-}
-
-static int print_pid_list(pid_list *plist)
-{
- while (plist != NULL) {
- printf("%u ", (unsigned)plist->pid);
- plist = plist->next;
- }
- bb_putchar('\n');
- return 1;
-}
+ scan_link("cwd", pid);
+ scan_link("exe", pid);
+ scan_link("root", pid);
-static int kill_pid_list(pid_list *plist, int sig)
-{
- pid_t mypid = getpid();
- int success = 1;
+ scan_dir_links("fd", pid);
+ scan_dir_links("lib", pid);
+ scan_dir_links("mmap", pid);
- while (plist != NULL) {
- if (plist->pid != mypid) {
- if (kill(plist->pid, sig) != 0) {
- bb_perror_msg("kill pid %u", (unsigned)plist->pid);
- success = 0;
- }
- }
- plist = plist->next;
+ scan_pid_maps("maps", pid);
+ xchdir("/proc");
}
- return success;
+ closedir(d);
}
int fuser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int fuser_main(int argc, char **argv)
+int fuser_main(int argc UNUSED_PARAM, char **argv)
{
pid_list *plist;
- inode_list *ilist;
+ pid_t mypid;
char **pp;
- dev_t dev;
- ino_t inode;
+ struct stat st;
unsigned port;
int opt;
- int success;
+ int exitcode;
int killsig;
/*
-fuser [options] FILEs or PORT/PROTOs
+fuser [OPTIONS] FILE or PORT/PROTO
Find processes which use FILEs or PORTs
-m Find processes which use same fs as FILEs
-4 Search only IPv4 space
-6 Search only IPv6 space
- -s Silent: just exit with 0 if any processes are found
- -k Kill found processes (otherwise display PIDs)
- -SIGNAL Signal to send (default: TERM)
+ -s Don't display PIDs
+ -k Kill found processes
+ -SIGNAL Signal to send (default: KILL)
*/
/* Handle -SIGNAL. Oh my... */
- killsig = SIGTERM;
+ killsig = SIGKILL; /* yes, the default is not SIGTERM */
pp = argv;
while (*++pp) {
char *arg = *pp;
break;
}
+ opt_complementary = "-1"; /* at least one param */
opt = getopt32(argv, OPTION_STRING);
argv += optind;
- xchdir("/proc");
-
- ilist = NULL;
pp = argv;
while (*pp) {
- char *proto = parse_net_arg(*pp, &port);
- if (proto) { /* PORT/PROTO */
- ilist = scan_proc_net(proto, port, ilist);
- free(proto);
+ /* parse net arg */
+ char path[20], tproto[5];
+ if (sscanf(*pp, "%u/%4s", &port, tproto) != 2)
+ goto file;
+ sprintf(path, "/proc/net/%s", tproto);
+ if (access(path, R_OK) != 0) { /* PORT/PROTO */
+ scan_proc_net(path, port);
} else { /* FILE */
- if (!file_to_dev_inode(*pp, &dev, &inode))
- bb_perror_msg_and_die("can't open %s", *pp);
- ilist = add_inode(ilist, dev, inode);
+ file:
+ xstat(*pp, &st);
+ add_inode(&st);
}
pp++;
}
- plist = scan_proc_pids(ilist);
+ scan_proc_pids(); /* changes dir to "/proc" */
- if (!plist)
- return EXIT_FAILURE;
- success = 1;
- if (opt & OPT_KILL) {
- success = kill_pid_list(plist, killsig);
- } else if (!(opt & OPT_SILENT)) {
- success = print_pid_list(plist);
+ mypid = getpid();
+ plist = G.pid_list_head;
+ while (1) {
+ if (!plist)
+ return EXIT_FAILURE;
+ if (plist->pid != mypid)
+ break;
+ plist = plist->next;
}
- return (success != 1); /* 0 == success */
+
+ exitcode = EXIT_SUCCESS;
+ do {
+ if (plist->pid != mypid) {
+ if (opt & OPT_KILL) {
+ if (kill(plist->pid, killsig) != 0) {
+ bb_perror_msg("kill pid %u", (unsigned)plist->pid);
+ exitcode = EXIT_FAILURE;
+ }
+ }
+ if (!(opt & OPT_SILENT)) {
+ printf("%u ", (unsigned)plist->pid);
+ }
+ }
+ plist = plist->next;
+ } while (plist);
+
+ if (!(opt & (OPT_SILENT))) {
+ bb_putchar('\n');
+ }
+
+ return exitcode;
}
projects / oweals / busybox.git / blobdiff