aboutsummaryrefslogtreecommitdiff
path: root/procps
diff options
context:
space:
mode:
authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-03-17 08:44:58 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-03-17 08:44:58 +0000
commitafc4113ed747330c7f0cc281618bf3e19579810d (patch)
tree19f473eec85cd12174b4ba59fb0a807559366c18 /procps
parentcdf62770af9e8bf7d5bb2344ddef8acb3216cfe2 (diff)
downloadbusybox-afc4113ed747330c7f0cc281618bf3e19579810d.tar.gz
busybox-afc4113ed747330c7f0cc281618bf3e19579810d.tar.bz2
fuser: bugfixes and shrink. It was assuming that xmalloc zeroes returned area!
function old new delta scan_dir_links - 106 +106 add_inode - 89 +89 scan_link - 78 +78 file_to_dev_inode - 64 +64 search_dev_inode - 63 +63 add_pid - 39 +39 packed_usage 23948 23928 -20 fuser_add_pid 49 - -49 fuser_file_to_dev_inode 64 - -64 fuser_search_dev_inode 77 - -77 fuser_scan_link 91 - -91 fuser_scan_dir_links 108 - -108 fuser_add_inode 124 - -124 fuser_main 1450 1243 -207 ------------------------------------------------------------------------------ (add/remove: 6/6 grow/shrink: 0/2 up/down: 439/-740) Total: -301 bytes text data bss dec hex filename 798327 658 7428 806413 c4e0d busybox_old 797988 658 7428 806074 c4cba busybox_unstripped
Diffstat (limited to 'procps')
-rw-r--r--procps/fuser.c400
1 files changed, 179 insertions, 221 deletions
diff --git a/procps/fuser.c b/procps/fuser.c
index 36d634d91..d625b16ab 100644
--- a/procps/fuser.c
+++ b/procps/fuser.c
@@ -10,187 +10,148 @@
#include "libbb.h"
-#define FUSER_PROC_DIR "/proc"
-#define FUSER_MAX_LINE 255
+#define MAX_LINE 255
-#define FUSER_OPT_MOUNT 1
-#define FUSER_OPT_KILL 2
-#define FUSER_OPT_SILENT 4
-#define FUSER_OPT_IP6 8
-#define FUSER_OPT_IP4 16
+#define OPTION_STRING "mks64"
+enum {
+ OPT_MOUNT = (1 << 0),
+ OPT_KILL = (1 << 1),
+ OPT_SILENT = (1 << 2),
+ OPT_IP6 = (1 << 3),
+ OPT_IP4 = (1 << 4),
+};
typedef struct inode_list {
+ struct inode_list *next;
ino_t inode;
dev_t dev;
- struct inode_list *next;
} inode_list;
typedef struct pid_list {
- pid_t pid;
struct pid_list *next;
+ pid_t pid;
} pid_list;
-static int fuser_option(char *option)
+static dev_t find_socket_dev(void)
{
- int opt = 0;
-
- if (!option[0])
- return 0;
- if (option[0] != '-')
- return 0;
- ++option;
- while (*option != '\0') {
- if (*option == 'm') opt |= FUSER_OPT_MOUNT;
- else if (*option == 'k') opt |= FUSER_OPT_KILL;
- else if (*option == 's') opt |= FUSER_OPT_SILENT;
- else if (*option == '6') opt |= FUSER_OPT_IP6;
- else if (*option == '4') opt |= FUSER_OPT_IP4;
- else
- bb_error_msg_and_die("unsupported option '%c'", *option);
- ++option;
+ 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 opt;
+ return 0;
}
-static int fuser_file_to_dev_inode(const char *filename,
- dev_t *dev, ino_t *inode)
+static int file_to_dev_inode(const char *filename, dev_t *dev, ino_t *inode)
{
struct stat f_stat;
- if ((stat(filename, &f_stat)) < 0)
+ if (stat(filename, &f_stat))
return 0;
*inode = f_stat.st_ino;
*dev = f_stat.st_dev;
return 1;
}
-static int fuser_find_socket_dev(dev_t *dev)
+static char *parse_net_arg(const char *arg, unsigned *port)
{
- int fd = socket(PF_INET, SOCK_DGRAM,0);
- struct stat buf;
-
- if (fd >= 0 && (fstat(fd, &buf)) == 0) {
- *dev = buf.st_dev;
- close(fd);
- return 1;
- }
- return 0;
+ 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 int fuser_parse_net_arg(const char *filename,
- const char **proto, int *port)
+static pid_list *add_pid(pid_list *plist, pid_t pid)
{
- char path[sizeof(FUSER_PROC_DIR)+12], tproto[5];
-
- if ((sscanf(filename, "%d/%4s", port, tproto)) != 2)
- return 0;
- sprintf(path, FUSER_PROC_DIR "/net/%s", tproto);
- if ((access(path, R_OK)) != 0)
- return 0;
- *proto = xstrdup(tproto);
- return 1;
-}
-
-static int fuser_add_pid(pid_list *plist, pid_t pid)
-{
- pid_list *curr = NULL, *last = NULL;
-
- if (plist->pid == 0)
- plist->pid = pid;
- curr = plist;
+ pid_list *curr = plist;
while (curr != NULL) {
if (curr->pid == pid)
- return 1;
- last = curr;
+ return plist;
curr = curr->next;
}
- curr = xzalloc(sizeof(pid_list));
- last->next = curr;
+ curr = xmalloc(sizeof(pid_list));
curr->pid = pid;
- /*curr->next = NULL;*/
- return 1;
+ curr->next = plist;
+ return curr;
}
-static int fuser_add_inode(inode_list *ilist, dev_t dev, ino_t inode)
+static inode_list *add_inode(inode_list *ilist, dev_t dev, ino_t inode)
{
- inode_list *curr = NULL, *last = NULL;
-
- if (!ilist->inode && !ilist->dev) {
- ilist->dev = dev;
- ilist->inode = inode;
- }
- curr = ilist;
+ inode_list *curr = ilist;
while (curr != NULL) {
if (curr->inode == inode && curr->dev == dev)
- return 1;
- last = curr;
+ return ilist;
curr = curr->next;
}
- curr = xzalloc(sizeof(inode_list));
- last->next = curr;
+ curr = xmalloc(sizeof(inode_list));
curr->dev = dev;
curr->inode = inode;
- /*curr->next = NULL;*/
- return 1;
+ curr->next = ilist;
+ return curr;
}
-static int fuser_scan_proc_net(int opts, const char *proto,
- int port, inode_list *ilist)
+static inode_list *scan_proc_net(const char *proto,
+ unsigned port, inode_list *ilist)
{
- char path[sizeof(FUSER_PROC_DIR)+12], line[FUSER_MAX_LINE+1];
+ char path[12], line[MAX_LINE + 1];
char addr[128];
ino_t tmp_inode;
dev_t tmp_dev;
long long uint64_inode;
- int tmp_port;
+ unsigned tmp_port;
FILE *f;
- if (!fuser_find_socket_dev(&tmp_dev))
- tmp_dev = 0;
- sprintf(path, FUSER_PROC_DIR "/net/%s", proto);
+ tmp_dev = find_socket_dev();
+ sprintf(path, "net/%s", proto);
f = fopen(path, "r");
if (!f)
- return 0;
- while (fgets(line, FUSER_MAX_LINE, f)) {
+ return ilist;
+
+ while (fgets(line, MAX_LINE, f)) {
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 && (opts & FUSER_OPT_IP6))
+ if (strlen(addr) == 8 && (option_mask32 & OPT_IP6))
continue;
- if (strlen(addr) > 8 && (opts & FUSER_OPT_IP4))
+ if (strlen(addr) > 8 && (option_mask32 & OPT_IP4))
continue;
if (tmp_port == port) {
tmp_inode = uint64_inode;
- fuser_add_inode(ilist, tmp_dev, tmp_inode);
+ ilist = add_inode(ilist, tmp_dev, tmp_inode);
}
}
}
fclose(f);
- return 1;
+ return ilist;
}
-static int fuser_search_dev_inode(int opts, inode_list *ilist,
- dev_t dev, ino_t inode)
+static int search_dev_inode(inode_list *ilist, dev_t dev, ino_t inode)
{
- inode_list *curr;
- curr = ilist;
-
- while (curr) {
- if ((opts & FUSER_OPT_MOUNT) && curr->dev == dev)
- return 1;
- if (curr->inode == inode && curr->dev == dev)
- return 1;
- curr = curr->next;
+ while (ilist) {
+ if (ilist->dev == dev) {
+ if (option_mask32 & OPT_MOUNT)
+ return 1;
+ if (ilist->inode == inode)
+ return 1;
+ }
+ ilist = ilist->next;
}
return 0;
}
-static int fuser_scan_pid_maps(int opts, const char *fname, pid_t pid,
- inode_list *ilist, pid_list *plist)
+static pid_list *scan_pid_maps(const char *fname, pid_t pid,
+ inode_list *ilist, pid_list *plist)
{
FILE *file;
- char line[FUSER_MAX_LINE + 1];
+ char line[MAX_LINE + 1];
int major, minor;
ino_t inode;
long long uint64_inode;
@@ -198,37 +159,36 @@ static int fuser_scan_pid_maps(int opts, const char *fname, pid_t pid,
file = fopen(fname, "r");
if (!file)
- return 0;
- while (fgets(line, FUSER_MAX_LINE, file)) {
+ return plist;
+ 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)
continue;
dev = makedev(major, minor);
- if (fuser_search_dev_inode(opts, ilist, dev, inode)) {
- fuser_add_pid(plist, pid);
- }
+ if (search_dev_inode(ilist, dev, inode))
+ plist = add_pid(plist, pid);
}
fclose(file);
- return 1;
+ return plist;
}
-static int fuser_scan_link(int opts, const char *lname, pid_t pid,
- inode_list *ilist, pid_list *plist)
+static pid_list *scan_link(const char *lname, pid_t pid,
+ inode_list *ilist, pid_list *plist)
{
ino_t inode;
dev_t dev;
- if (!fuser_file_to_dev_inode(lname, &dev, &inode))
- return 0;
- if (fuser_search_dev_inode(opts, ilist, dev, inode))
- fuser_add_pid(plist, pid);
- return 1;
+ if (!file_to_dev_inode(lname, &dev, &inode))
+ return plist;
+ if (search_dev_inode(ilist, dev, inode))
+ plist = add_pid(plist, pid);
+ return plist;
}
-static int fuser_scan_dir_links(int opts, const char *dname, pid_t pid,
- inode_list *ilist, pid_list *plist)
+static pid_list *scan_dir_links(const char *dname, pid_t pid,
+ inode_list *ilist, pid_list *plist)
{
DIR *d;
struct dirent *de;
@@ -236,82 +196,72 @@ static int fuser_scan_dir_links(int opts, const char *dname, pid_t pid,
d = opendir(dname);
if (!d)
- return 0;
+ return plist;
while ((de = readdir(d)) != NULL) {
lname = concat_subpath_file(dname, de->d_name);
if (lname == NULL)
continue;
- fuser_scan_link(opts, lname, pid, ilist, plist);
+ plist = scan_link(lname, pid, ilist, plist);
free(lname);
}
closedir(d);
- return 1;
+ return plist;
}
-static int fuser_scan_proc_pids(int opts, inode_list *ilist, pid_list *plist)
+static pid_list *scan_proc_pids(inode_list *ilist)
{
DIR *d;
struct dirent *de;
pid_t pid;
- char *dname;
+ pid_list *plist;
- d = opendir(FUSER_PROC_DIR);
+ d = opendir(".");
if (!d)
- return 0;
+ return NULL;
+
+ plist = NULL;
while ((de = readdir(d)) != NULL) {
- pid = (pid_t)atoi(de->d_name);
- if (!pid)
+ pid = (pid_t)bb_strtou(de->d_name, NULL, 10);
+ if (errno)
continue;
- dname = concat_subpath_file(FUSER_PROC_DIR, de->d_name);
- if (chdir(dname) < 0) {
- free(dname);
+ if (chdir(de->d_name) < 0)
continue;
- }
- free(dname);
- fuser_scan_link(opts, "cwd", pid, ilist, plist);
- fuser_scan_link(opts, "exe", pid, ilist, plist);
- fuser_scan_link(opts, "root", pid, ilist, plist);
- fuser_scan_dir_links(opts, "fd", pid, ilist, plist);
- fuser_scan_dir_links(opts, "lib", pid, ilist, plist);
- fuser_scan_dir_links(opts, "mmap", pid, ilist, plist);
- fuser_scan_pid_maps(opts, "maps", pid, ilist, plist);
- chdir("..");
+ 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 1;
+ return plist;
}
-static int fuser_print_pid_list(pid_list *plist)
+static int print_pid_list(pid_list *plist)
{
- pid_list *curr = plist;
-
- if (plist == NULL)
- return 0;
- while (curr != NULL) {
- if (curr->pid > 0)
- printf("%d ", curr->pid);
- curr = curr->next;
+ while (plist != NULL) {
+ printf("%u ", (unsigned)plist->pid);
+ plist = plist->next;
}
bb_putchar('\n');
return 1;
}
-static int fuser_kill_pid_list(pid_list *plist, int sig)
+static int kill_pid_list(pid_list *plist, int sig)
{
- pid_list *curr = plist;
pid_t mypid = getpid();
int success = 1;
- if (plist == NULL)
- return 0;
- while (curr != NULL) {
- if (curr->pid > 0 && curr->pid != mypid) {
- if (kill(curr->pid, sig) != 0) {
- bb_perror_msg("kill pid '%d'", curr->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;
}
}
- curr = curr->next;
+ plist = plist->next;
}
return success;
}
@@ -319,69 +269,77 @@ static int fuser_kill_pid_list(pid_list *plist, int sig)
int fuser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fuser_main(int argc, char **argv)
{
- /*static -- huh???*/ int opt = 0; /* FUSER_OPT_ */
-
- int port, i, optn;
- int* fni; /* file name indexes of argv */
- int fnic = 0; /* file name index count */
- const char *proto;
+ pid_list *plist;
+ inode_list *ilist;
+ char **pp;
dev_t dev;
ino_t inode;
- pid_list *pids;
- inode_list *inodes;
- int killsig = SIGTERM;
- int success = 1;
-
- if (argc < 2)
- bb_show_usage();
-
- fni = xmalloc(sizeof(int));
- for (i = 1; i < argc; i++) {
- optn = fuser_option(argv[i]);
- if (optn)
- opt |= optn;
- else if (argv[i][0] == '-') {
- killsig = get_signum(argv[i]+1);
- if (killsig < 0)
- killsig = SIGTERM;
- } else {
- fni = xrealloc(fni, sizeof(int) * (fnic+2));
- fni[fnic++] = i;
- }
+ unsigned port;
+ int opt;
+ int success;
+ int killsig;
+/*
+fuser [options] FILEs or PORT/PROTOs
+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)
+*/
+ /* Handle -SIGNAL. Oh my... */
+ killsig = SIGTERM;
+ pp = argv;
+ while (*++pp) {
+ char *arg = *pp;
+ if (arg[0] != '-')
+ continue;
+ if (arg[1] == '-' && arg[2] == '\0') /* "--" */
+ break;
+ if ((arg[1] == '4' || arg[1] == '6') && arg[2] == '\0')
+ continue; /* it's "-4" or "-6" */
+ opt = get_signum(&arg[1]);
+ if (opt < 0)
+ continue;
+ /* "-SIGNAL" option found. Remove it and bail out */
+ killsig = opt;
+ do {
+ pp[0] = arg = pp[1];
+ pp++;
+ } while (arg);
+ break;
}
- if (!fnic)
- return 1;
-
- inodes = xmalloc(sizeof(inode_list));
- for (i = 0; i < fnic; i++) {
- if (fuser_parse_net_arg(argv[fni[i]], &proto, &port)) {
- fuser_scan_proc_net(opt, proto, port, inodes);
- } else {
- if (!fuser_file_to_dev_inode(argv[fni[i]], &dev, &inode)) {
- if (ENABLE_FEATURE_CLEAN_UP)
- free(inodes);
- bb_perror_msg_and_die("cannot open '%s'", argv[fni[i]]);
- }
- fuser_add_inode(inodes, dev, inode);
+ 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);
+ } 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);
}
+ pp++;
}
- pids = xmalloc(sizeof(pid_list));
- success = fuser_scan_proc_pids(opt, inodes, pids);
- /* if the first pid in the list is 0, none have been found */
- if (pids->pid == 0)
- success = 0;
- if (success) {
- if (opt & FUSER_OPT_KILL) {
- success = fuser_kill_pid_list(pids, killsig);
- } else if (!(opt & FUSER_OPT_SILENT)) {
- success = fuser_print_pid_list(pids);
- }
- }
- if (ENABLE_FEATURE_CLEAN_UP) {
- free(pids);
- free(inodes);
+
+ plist = scan_proc_pids(ilist);
+
+ 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);
}
- /* return 0 on (success == 1) 1 otherwise */
- return (success != 1);
+ return (success != 1); /* 0 == success */
}