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
This commit is contained in:
Denis Vlasenko
parent
cdf62770af
commit
afc4113ed7
@ -757,7 +757,7 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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#define dos2unix_full_usage \
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"Convert FILE from dos to unix format.\n" \
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"When no file is given, use stdin/stdout.\n" \
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"\nOptions:\n" \
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"\nOptions:" \
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"\n -u dos2unix" \
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"\n -d unix2dos"
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@ -1024,7 +1024,7 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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"[-C CYLINDERS] [-H HEADS] [-S SECTORS] [-b SSZ] DISK"
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#define fdisk_full_usage \
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"Change partition table\n" \
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"\nOptions:\n" \
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"\nOptions:" \
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"\n -u Start and End are in sectors (instead of cylinders)" \
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"\n -l Show partition table for each DISK, then exit" \
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USE_FEATURE_FDISK_BLKSIZE( \
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@ -1213,13 +1213,14 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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#define fuser_trivial_usage \
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"[options] FILE or PORT/PROTO"
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#define fuser_full_usage \
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"Options:\n" \
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" -m Show all processes on the same mounted fs\n" \
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" -s Don't print or kill anything\n" \
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" -4 Search only IPv4 space\n" \
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" -6 Search only IPv6 space\n" \
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" -k Kill all processes that match\n" \
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" -SIGNAL Signal to send (default: TERM)"
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"Find processes which use FILEs or PORTs\n" \
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"\nOptions:" \
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"\n -m Find processes which use same fs as FILEs" \
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"\n -4 Search only IPv4 space" \
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"\n -6 Search only IPv6 space" \
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"\n -s Silent: just exit with 0 if any processes are found" \
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"\n -k Kill found processes (otherwise display PIDs)" \
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"\n -SIGNAL Signal to send (default: TERM)"
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#define getenforce_trivial_usage
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#define getenforce_full_usage
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@ -4093,7 +4094,7 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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"[flags] FILESYSTEM|DIRECTORY"
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#define umount_full_usage \
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"Unmount file systems" \
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"\n\nOptions:\n" \
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"\n\nOptions:" \
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USE_FEATURE_UMOUNT_ALL( \
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"\n -a Unmount all file systems" USE_FEATURE_MTAB_SUPPORT(" in /etc/mtab")) \
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USE_FEATURE_MTAB_SUPPORT( \
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@ -4168,7 +4169,7 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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#define unix2dos_full_usage \
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"Convert FILE from unix to dos format.\n" \
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"When no file is given, use stdin/stdout.\n" \
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"\nOptions:\n" \
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"\nOptions:" \
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"\n -u dos2unix" \
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"\n -d unix2dos"
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394
procps/fuser.c
394
procps/fuser.c
@ -10,187 +10,148 @@
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#include "libbb.h"
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#define FUSER_PROC_DIR "/proc"
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#define FUSER_MAX_LINE 255
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#define MAX_LINE 255
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#define FUSER_OPT_MOUNT 1
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#define FUSER_OPT_KILL 2
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#define FUSER_OPT_SILENT 4
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#define FUSER_OPT_IP6 8
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#define FUSER_OPT_IP4 16
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#define OPTION_STRING "mks64"
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enum {
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OPT_MOUNT = (1 << 0),
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OPT_KILL = (1 << 1),
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OPT_SILENT = (1 << 2),
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OPT_IP6 = (1 << 3),
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OPT_IP4 = (1 << 4),
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};
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typedef struct inode_list {
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struct inode_list *next;
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ino_t inode;
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dev_t dev;
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struct inode_list *next;
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} inode_list;
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typedef struct pid_list {
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pid_t pid;
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struct pid_list *next;
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pid_t pid;
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} pid_list;
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static int fuser_option(char *option)
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static dev_t find_socket_dev(void)
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{
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int opt = 0;
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if (!option[0])
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return 0;
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if (option[0] != '-')
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return 0;
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++option;
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while (*option != '\0') {
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if (*option == 'm') opt |= FUSER_OPT_MOUNT;
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else if (*option == 'k') opt |= FUSER_OPT_KILL;
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else if (*option == 's') opt |= FUSER_OPT_SILENT;
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else if (*option == '6') opt |= FUSER_OPT_IP6;
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else if (*option == '4') opt |= FUSER_OPT_IP4;
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else
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bb_error_msg_and_die("unsupported option '%c'", *option);
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++option;
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int fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (fd >= 0) {
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struct stat buf;
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int r = fstat(fd, &buf);
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close(fd);
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if (r == 0)
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return buf.st_dev;
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}
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return opt;
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return 0;
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}
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static int fuser_file_to_dev_inode(const char *filename,
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dev_t *dev, ino_t *inode)
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static int file_to_dev_inode(const char *filename, dev_t *dev, ino_t *inode)
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{
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struct stat f_stat;
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if ((stat(filename, &f_stat)) < 0)
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if (stat(filename, &f_stat))
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return 0;
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*inode = f_stat.st_ino;
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*dev = f_stat.st_dev;
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return 1;
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}
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static int fuser_find_socket_dev(dev_t *dev)
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static char *parse_net_arg(const char *arg, unsigned *port)
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{
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int fd = socket(PF_INET, SOCK_DGRAM,0);
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struct stat buf;
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char path[12], tproto[5];
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if (fd >= 0 && (fstat(fd, &buf)) == 0) {
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*dev = buf.st_dev;
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close(fd);
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return 1;
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}
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return 0;
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if (sscanf(arg, "%u/%4s", port, tproto) != 2)
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return NULL;
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sprintf(path, "net/%s", tproto);
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if (access(path, R_OK) != 0)
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return NULL;
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return xstrdup(tproto);
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}
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static int fuser_parse_net_arg(const char *filename,
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const char **proto, int *port)
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static pid_list *add_pid(pid_list *plist, pid_t pid)
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{
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char path[sizeof(FUSER_PROC_DIR)+12], tproto[5];
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if ((sscanf(filename, "%d/%4s", port, tproto)) != 2)
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return 0;
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sprintf(path, FUSER_PROC_DIR "/net/%s", tproto);
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if ((access(path, R_OK)) != 0)
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return 0;
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*proto = xstrdup(tproto);
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return 1;
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}
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static int fuser_add_pid(pid_list *plist, pid_t pid)
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{
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pid_list *curr = NULL, *last = NULL;
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if (plist->pid == 0)
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plist->pid = pid;
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curr = plist;
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pid_list *curr = plist;
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while (curr != NULL) {
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if (curr->pid == pid)
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return 1;
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last = curr;
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return plist;
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curr = curr->next;
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}
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curr = xzalloc(sizeof(pid_list));
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last->next = curr;
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curr = xmalloc(sizeof(pid_list));
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curr->pid = pid;
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/*curr->next = NULL;*/
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return 1;
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curr->next = plist;
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return curr;
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}
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static int fuser_add_inode(inode_list *ilist, dev_t dev, ino_t inode)
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static inode_list *add_inode(inode_list *ilist, dev_t dev, ino_t inode)
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{
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inode_list *curr = NULL, *last = NULL;
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if (!ilist->inode && !ilist->dev) {
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ilist->dev = dev;
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ilist->inode = inode;
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}
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curr = ilist;
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inode_list *curr = ilist;
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while (curr != NULL) {
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if (curr->inode == inode && curr->dev == dev)
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return 1;
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last = curr;
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return ilist;
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curr = curr->next;
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}
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curr = xzalloc(sizeof(inode_list));
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last->next = curr;
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curr = xmalloc(sizeof(inode_list));
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curr->dev = dev;
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curr->inode = inode;
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/*curr->next = NULL;*/
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return 1;
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curr->next = ilist;
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return curr;
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}
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static int fuser_scan_proc_net(int opts, const char *proto,
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int port, inode_list *ilist)
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static inode_list *scan_proc_net(const char *proto,
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unsigned port, inode_list *ilist)
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{
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char path[sizeof(FUSER_PROC_DIR)+12], line[FUSER_MAX_LINE+1];
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char path[12], line[MAX_LINE + 1];
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char addr[128];
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ino_t tmp_inode;
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dev_t tmp_dev;
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long long uint64_inode;
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int tmp_port;
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unsigned tmp_port;
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FILE *f;
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if (!fuser_find_socket_dev(&tmp_dev))
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tmp_dev = 0;
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sprintf(path, FUSER_PROC_DIR "/net/%s", proto);
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tmp_dev = find_socket_dev();
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sprintf(path, "net/%s", proto);
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f = fopen(path, "r");
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if (!f)
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return 0;
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while (fgets(line, FUSER_MAX_LINE, f)) {
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return ilist;
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while (fgets(line, MAX_LINE, f)) {
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if (sscanf(line, "%*d: %64[0-9A-Fa-f]:%x %*x:%*x %*x %*x:%*x "
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"%*x:%*x %*x %*d %*d %llu",
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addr, &tmp_port, &uint64_inode) == 3
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) {
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if (strlen(addr) == 8 && (opts & FUSER_OPT_IP6))
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if (strlen(addr) == 8 && (option_mask32 & OPT_IP6))
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continue;
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if (strlen(addr) > 8 && (opts & FUSER_OPT_IP4))
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if (strlen(addr) > 8 && (option_mask32 & OPT_IP4))
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continue;
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if (tmp_port == port) {
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tmp_inode = uint64_inode;
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fuser_add_inode(ilist, tmp_dev, tmp_inode);
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ilist = add_inode(ilist, tmp_dev, tmp_inode);
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}
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}
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}
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fclose(f);
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return 1;
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return ilist;
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}
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static int fuser_search_dev_inode(int opts, inode_list *ilist,
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dev_t dev, ino_t inode)
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static int search_dev_inode(inode_list *ilist, dev_t dev, ino_t inode)
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{
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inode_list *curr;
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curr = ilist;
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while (curr) {
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if ((opts & FUSER_OPT_MOUNT) && curr->dev == dev)
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return 1;
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if (curr->inode == inode && curr->dev == dev)
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return 1;
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curr = curr->next;
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while (ilist) {
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if (ilist->dev == dev) {
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if (option_mask32 & OPT_MOUNT)
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return 1;
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if (ilist->inode == inode)
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return 1;
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}
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ilist = ilist->next;
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}
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return 0;
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}
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static int fuser_scan_pid_maps(int opts, const char *fname, pid_t pid,
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inode_list *ilist, pid_list *plist)
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static pid_list *scan_pid_maps(const char *fname, pid_t pid,
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inode_list *ilist, pid_list *plist)
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{
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FILE *file;
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char line[FUSER_MAX_LINE + 1];
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char line[MAX_LINE + 1];
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int major, minor;
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ino_t inode;
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long long uint64_inode;
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@ -198,37 +159,36 @@ static int fuser_scan_pid_maps(int opts, const char *fname, pid_t pid,
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file = fopen(fname, "r");
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if (!file)
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return 0;
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while (fgets(line, FUSER_MAX_LINE, file)) {
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return plist;
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while (fgets(line, MAX_LINE, file)) {
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if (sscanf(line, "%*s %*s %*s %x:%x %llu", &major, &minor, &uint64_inode) != 3)
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continue;
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inode = uint64_inode;
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if (major == 0 && minor == 0 && inode == 0)
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continue;
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dev = makedev(major, minor);
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if (fuser_search_dev_inode(opts, ilist, dev, inode)) {
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fuser_add_pid(plist, pid);
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}
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if (search_dev_inode(ilist, dev, inode))
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plist = add_pid(plist, pid);
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}
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fclose(file);
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return 1;
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return plist;
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}
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static int fuser_scan_link(int opts, const char *lname, pid_t pid,
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inode_list *ilist, pid_list *plist)
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static pid_list *scan_link(const char *lname, pid_t pid,
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inode_list *ilist, pid_list *plist)
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{
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ino_t inode;
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dev_t dev;
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if (!fuser_file_to_dev_inode(lname, &dev, &inode))
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return 0;
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if (fuser_search_dev_inode(opts, ilist, dev, inode))
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fuser_add_pid(plist, pid);
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return 1;
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if (!file_to_dev_inode(lname, &dev, &inode))
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return plist;
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if (search_dev_inode(ilist, dev, inode))
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plist = add_pid(plist, pid);
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return plist;
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}
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static int fuser_scan_dir_links(int opts, const char *dname, pid_t pid,
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inode_list *ilist, pid_list *plist)
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static pid_list *scan_dir_links(const char *dname, pid_t pid,
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inode_list *ilist, pid_list *plist)
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{
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DIR *d;
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struct dirent *de;
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@ -236,82 +196,72 @@ static int fuser_scan_dir_links(int opts, const char *dname, pid_t pid,
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d = opendir(dname);
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if (!d)
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return 0;
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return plist;
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while ((de = readdir(d)) != NULL) {
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lname = concat_subpath_file(dname, de->d_name);
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if (lname == NULL)
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continue;
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fuser_scan_link(opts, lname, pid, ilist, plist);
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plist = scan_link(lname, pid, ilist, plist);
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free(lname);
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}
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closedir(d);
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return 1;
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return plist;
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}
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static int fuser_scan_proc_pids(int opts, inode_list *ilist, pid_list *plist)
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static pid_list *scan_proc_pids(inode_list *ilist)
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{
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DIR *d;
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struct dirent *de;
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pid_t pid;
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char *dname;
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pid_list *plist;
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d = opendir(FUSER_PROC_DIR);
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d = opendir(".");
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if (!d)
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return 0;
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return NULL;
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plist = NULL;
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while ((de = readdir(d)) != NULL) {
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pid = (pid_t)atoi(de->d_name);
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if (!pid)
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pid = (pid_t)bb_strtou(de->d_name, NULL, 10);
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if (errno)
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continue;
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dname = concat_subpath_file(FUSER_PROC_DIR, de->d_name);
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if (chdir(dname) < 0) {
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free(dname);
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if (chdir(de->d_name) < 0)
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continue;
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}
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free(dname);
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fuser_scan_link(opts, "cwd", pid, ilist, plist);
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fuser_scan_link(opts, "exe", pid, ilist, plist);
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fuser_scan_link(opts, "root", pid, ilist, plist);
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fuser_scan_dir_links(opts, "fd", pid, ilist, plist);
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fuser_scan_dir_links(opts, "lib", pid, ilist, plist);
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fuser_scan_dir_links(opts, "mmap", pid, ilist, plist);
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fuser_scan_pid_maps(opts, "maps", pid, ilist, plist);
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chdir("..");
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plist = scan_link("cwd", pid, ilist, plist);
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plist = scan_link("exe", pid, ilist, plist);
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plist = scan_link("root", pid, ilist, plist);
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plist = scan_dir_links("fd", pid, ilist, plist);
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plist = scan_dir_links("lib", pid, ilist, plist);
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plist = scan_dir_links("mmap", pid, ilist, plist);
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plist = scan_pid_maps("maps", pid, ilist, plist);
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xchdir("/proc");
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}
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closedir(d);
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return 1;
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return plist;
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}
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static int fuser_print_pid_list(pid_list *plist)
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static int print_pid_list(pid_list *plist)
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{
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pid_list *curr = plist;
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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;
|
||||
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 (argc < 2)
|
||||
bb_show_usage();
|
||||
opt = getopt32(argv, OPTION_STRING);
|
||||
argv += optind;
|
||||
|
||||
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;
|
||||
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++;
|
||||
}
|
||||
|
||||
if (!fnic)
|
||||
return 1;
|
||||
plist = scan_proc_pids(ilist);
|
||||
|
||||
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);
|
||||
}
|
||||
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);
|
||||
}
|
||||
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);
|
||||
}
|
||||
/* return 0 on (success == 1) 1 otherwise */
|
||||
return (success != 1);
|
||||
return (success != 1); /* 0 == success */
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user