9870605403

Committed 10 Jul 2024 08:13AM UTC coverage: 47.91%. Remained the same

Build # 9870605403

Build Type

push

github

Committed by

karelzak

Commit Message

uuidd: fix /var/lib/libuuid mode uuidd-tmpfiles.conf

The directory can be directly used by libuuid, for example, by running
"uuidgen --time" as root, even if the uuidd daemon is not installed.
In this case, we must create a clock.txt file with the uuidd group to
prevent any potential ownership mismatch if the uuidd daemon is
installed later. The 2xxx mode (setgid) forces open(O_CREAT) in
libuuid to create the file with the uuidd group.

Please note that mode 2755 is the standard used for years in RHEL.

Signed-off-by: Karel Zak <kzak@redhat.com>
(cherry picked from commit e0c41735a)

Run Details

26758 of 58944 branches covered (45.4%)

Branch coverage included in aggregate %.

49867 of 100992 relevant lines covered (49.38%)

15767.81 hits per line

Source File
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66.32

/misc-utils/lslocks.c

/*
 * lslocks(8) - list local system locks
 *
 * Copyright (C) 2012 Davidlohr Bueso <dave@gnu.org>
 *
 * Very generally based on lslk(8) by Victor A. Abell <abe@purdue.edu>
 * Since it stopped being maintained over a decade ago, this
 * program should be considered its replacement.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <stdio.h>
#include <string.h>
#include <getopt.h>
#include <stdlib.h>
#include <assert.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <stdbool.h>
#include <search.h>

#include <libmount.h>
#include <libsmartcols.h>

#include "pathnames.h"
#include "canonicalize.h"
#include "nls.h"
#include "xalloc.h"
#include "strutils.h"
#include "c.h"
#include "list.h"
#include "closestream.h"
#include "optutils.h"
#include "procfs.h"
#include "column-list-table.h"
#include "fileutils.h"

/* column IDs */
enum {
        COL_SRC = 0,
        COL_PID,
        COL_TYPE,
        COL_SIZE,
        COL_INODE,
        COL_MAJMIN,
        COL_MODE,
        COL_M,
        COL_START,
        COL_END,
        COL_PATH,
        COL_BLOCKER,
        COL_HOLDERS,
};

/* column names */
struct colinfo {
        const char * const        name; /* header */
        double                        whint; /* width hint (N < 1 is in percent of termwidth) */
        int                        flags; /* SCOLS_FL_* */
        const char                *help;
};

/* columns descriptions */
static struct colinfo infos[] = {
        [COL_SRC]  = { "COMMAND",15, 0, N_("command of the process holding the lock") },
        [COL_PID]  = { "PID",     5, SCOLS_FL_RIGHT, N_("PID of the process holding the lock") },
        [COL_TYPE] = { "TYPE",    5, SCOLS_FL_RIGHT, N_("kind of lock") },
        [COL_SIZE] = { "SIZE",    4, SCOLS_FL_RIGHT, N_("size of the lock, use <number> if --bytes is given") },
        [COL_INODE] = { "INODE",  5, SCOLS_FL_RIGHT, N_("inode number") },
        [COL_MAJMIN] = { "MAJ:MIN", 6, 0, N_("major:minor device number") },
        [COL_MODE] = { "MODE",    5, 0, N_("lock access mode") },
        [COL_M]    = { "M",       1, 0, N_("mandatory state of the lock: 0 (none), 1 (set)")},
        [COL_START] = { "START", 10, SCOLS_FL_RIGHT, N_("relative byte offset of the lock")},
        [COL_END]  = { "END",    10, SCOLS_FL_RIGHT, N_("ending offset of the lock")},
        [COL_PATH] = { "PATH",    0, SCOLS_FL_TRUNC, N_("path of the locked file")},
        [COL_BLOCKER] = { "BLOCKER", 0, SCOLS_FL_RIGHT, N_("PID of the process blocking the lock") },
        [COL_HOLDERS] = { "HOLDERS", 0, SCOLS_FL_WRAP, N_("holders of the lock") },
};

static int columns[ARRAY_SIZE(infos) * 2];
static size_t ncolumns;

static struct libmnt_table *tab;                /* /proc/self/mountinfo */

/* basic output flags */
static int no_headings;
static int no_inaccessible;
static int raw;
static int json;
static int bytes;

struct lock {
        struct list_head locks;

        char *cmdname;
        pid_t pid;
        char *path;
        char *type;
        char *mode;
        off_t start;
        off_t end;
        ino_t inode;
        dev_t dev;
        unsigned int mandatory :1,
                     blocked   :1;
        uint64_t size;
        int fd;
        int id;
};

struct lock_tnode {
        dev_t dev;
        ino_t inode;

        struct list_head chain;
};

static int lock_tnode_compare(const void *a, const void *b)
{
        struct lock_tnode *anode = ((struct lock_tnode *)a);
        struct lock_tnode *bnode = ((struct lock_tnode *)b);

        if (anode->dev > bnode->dev)
                return 1;
        else if (anode->dev < bnode->dev)
                return -1;

        if (anode->inode > bnode->inode)
                return 1;
        else if (anode->inode < bnode->inode)
                return -1;

        return 0;
}

static void add_to_tree(void *troot, struct lock *l)
{
        struct lock_tnode tmp = { .dev = l->dev, .inode = l->inode, };
        struct lock_tnode **head = tfind(&tmp, troot, lock_tnode_compare);
        struct lock_tnode *new_head;

        if (head) {
                list_add_tail(&l->locks, &(*head)->chain);
                return;
        }

        new_head = xmalloc(sizeof(*new_head));
        new_head->dev = l->dev;
        new_head->inode = l->inode;
        INIT_LIST_HEAD(&new_head->chain);
        if (tsearch(new_head, troot, lock_tnode_compare) == NULL)
                errx(EXIT_FAILURE, _("failed to allocate memory"));

        list_add_tail(&l->locks, &new_head->chain);
}

static void rem_lock(struct lock *lock)
{
        if (!lock)
                return;

        free(lock->path);
        free(lock->mode);
        free(lock->cmdname);
        free(lock->type);
        list_del(&lock->locks);
        free(lock);
}

static void disable_columns_truncate(void)
{
        size_t i;

        for (i = 0; i < ARRAY_SIZE(infos); i++)
                infos[i].flags &= ~SCOLS_FL_TRUNC;
}

/*
 * Associate the device's mountpoint for a filename
 */
static char *get_fallback_filename(dev_t dev)
{
        struct libmnt_fs *fs;
        char *res = NULL;

        if (!tab) {
                tab = mnt_new_table_from_file(_PATH_PROC_MOUNTINFO);
                if (!tab)
                        return NULL;
        }

        fs = mnt_table_find_devno(tab, dev, MNT_ITER_BACKWARD);
        if (!fs)
                return NULL;

        xasprintf(&res, "%s...", mnt_fs_get_target(fs));
        return res;
}

/*
 * Return the absolute path of a file from
 * a given inode number (and its size)
 */
static char *get_filename_sz(ino_t inode, pid_t lock_pid, size_t *size)
{
        struct stat sb;
        struct dirent *dp;
        DIR *dirp;
        size_t sz;
        int fd;
        char path[PATH_MAX] = { 0 },
             sym[PATH_MAX] = { 0 }, *ret = NULL;

        *size = 0;

        if (lock_pid < 0)
                /* pid could be -1 for OFD locks */
                return NULL;

        /*
         * We know the pid so we don't have to
         * iterate the *entire* filesystem searching
         * for the damn file.
         */
        snprintf(path, sizeof(path), "/proc/%d/fd/", lock_pid);
        if (!(dirp = opendir(path)))
                return NULL;

        if ((sz = strlen(path)) >= (sizeof(path) - 2))
                goto out;

        if ((fd = dirfd(dirp)) < 0 )
                goto out;

        while ((dp = xreaddir(dirp))) {
                ssize_t len;

                errno = 0;

                /* care only for numerical descriptors */
                if (!strtol(dp->d_name, (char **) NULL, 10) || errno)
                        continue;

                if (!fstatat(fd, dp->d_name, &sb, 0)
                    && inode != sb.st_ino)
                        continue;

                if ((len = readlinkat(fd, dp->d_name, sym, sizeof(sym) - 1)) < 1)
                        goto out;

                *size = sb.st_size;
                sym[len] = '\0';

                ret = xstrdup(sym);
                break;
        }
out:
        closedir(dirp);
        return ret;
}

/*
 * Return the inode number from a string
 */
static ino_t get_dev_inode(char *str, dev_t *dev)
{
        unsigned int maj = 0, min = 0;
        ino_t inum = 0;

        if (sscanf(str, "%x:%x:%ju", &maj, &min, &inum) != 3)
                errx(EXIT_FAILURE, _("failed to parse '%s'"), str);

        *dev = (dev_t) makedev(maj, min);
        return inum;
}

struct override_info {
        pid_t pid;
        const char *cmdname;
};

static bool is_holder(struct lock *l, struct lock *m)
{
        return (l->start == m->start &&
                l->end == m->end &&
                l->inode == m->inode &&
                l->dev == m->dev &&
                l->mandatory == m->mandatory &&
                l->blocked == m->blocked &&
                strcmp(l->type, m->type) == 0 &&
                strcmp(l->mode, m->mode) == 0);
}

static void patch_lock(struct lock *l, void *fallback)
{
        struct lock_tnode tmp = { .dev = l->dev, .inode = l->inode, };
        struct lock_tnode **head = tfind(&tmp, fallback, lock_tnode_compare);
        struct list_head *p;

        if (!head)
                return;

        list_for_each(p, &(*head)->chain) {
                struct lock *m = list_entry(p, struct lock, locks);
                if (is_holder(l, m)) {
                        /* size and id can be ignored. */
                        l->pid = m->pid;
                        l->cmdname = xstrdup(m->cmdname);
                        break;
                }
        }
}

static void add_to_list(void *locks, struct lock *l)
{
        list_add(&l->locks, locks);
}

static struct lock *get_lock(char *buf, struct override_info *oinfo, void *fallback)
{
        int i;
        char *tok = NULL;
        size_t sz;
        struct lock *l = xcalloc(1, sizeof(*l));
        INIT_LIST_HEAD(&l->locks);
        l->fd = -1;

        bool cmdname_unknown = false;

        for (tok = strtok(buf, " "), i = 0; tok;
             tok = strtok(NULL, " "), i++) {

                /*
                 * /proc/locks has *exactly* 8 "blocks" of text
                 * separated by ' ' - check <kernel>/fs/locks.c
                 */
                switch (i) {
                case 0: /* ID: */
                        if (oinfo)
                                l->id = -1;
                        else {
                                tok[strlen(tok) - 1] = '\0';
                                l->id = strtos32_or_err(tok, _("failed to parse ID"));
                        }
                        break;
                case 1: /* posix, flock, etc */
                        if (strcmp(tok, "->") == 0) {        /* optional field */
                                l->blocked = 1;
                                i--;
                        } else
                                l->type = xstrdup(tok);
                        break;

                case 2: /* is this a mandatory lock? other values are advisory or noinode */
                        l->mandatory = *tok == 'M' ? 1 : 0;
                        break;
                case 3: /* lock mode */
                        l->mode = xstrdup(tok);
                        break;

                case 4: /* PID */
                        /*
                         * If user passed a pid we filter it later when adding
                         * to the list, no need to worry now. OFD locks use -1 PID.
                         */
                        if (oinfo) {
                                l->pid = oinfo->pid;
                                l->cmdname = xstrdup(oinfo->cmdname);
                        } else {
                                l->pid = strtos32_or_err(tok, _("failed to parse pid"));
                                if (l->pid > 0) {
                                        l->cmdname = pid_get_cmdname(l->pid);
                                        if (!l->cmdname) {
                                                l->cmdname = NULL;
                                                cmdname_unknown = true;
                                        }
                                } else
                                        l->cmdname = NULL;
                        }
                        break;

                case 5: /* device major:minor and inode number */
                        l->inode = get_dev_inode(tok, &l->dev);
                        break;

                case 6: /* start */
                        l->start = !strcmp(tok, "EOF") ? 0 :
                        strtou64_or_err(tok, _("failed to parse start"));
                        break;

                case 7: /* end */
                        /* replace '\n' character */
                        tok[strlen(tok)-1] = '\0';
                        l->end = !strcmp(tok, "EOF") ? 0 :
                                strtou64_or_err(tok, _("failed to parse end"));
                        break;
                default:
                        break;
                }
        }

        if ((!l->blocked) && fallback && !l->cmdname)
                patch_lock(l, fallback);
        if (!l->cmdname) {
                if (cmdname_unknown)
                        l->cmdname = xstrdup(_("(unknown)"));
                else
                        l->cmdname = xstrdup(_("(undefined)"));
        }
        l->path = get_filename_sz(l->inode, l->pid, &sz);

        /* no permissions -- ignore */
        if (!l->path && no_inaccessible) {
                rem_lock(l);
                return NULL;
        }

        if (!l->path) {
                /* probably no permission to peek into l->pid's path */
                l->path = get_fallback_filename(l->dev);
                l->size = 0;
        } else
                l->size = sz;

        return l;
}

static int get_pid_lock(void *locks, void (*add_lock)(void *, struct lock *), FILE *fp,
                        pid_t pid, const char *cmdname, int fd)
{
        char buf[PATH_MAX];
        struct override_info oinfo = {
                .pid = pid,
                .cmdname = cmdname,
        };

        while (fgets(buf, sizeof(buf), fp)) {
                struct lock *l;
                if (strncmp(buf, "lock:\t", 6))
                        continue;
                l = get_lock(buf + 6, &oinfo, NULL);
                if (l) {
                        add_lock(locks, l);
                        l->fd = fd;
                }
                /* no break here.
                   Multiple recode locks can be taken via one fd. */
        }

        return 0;
}

static int get_pid_locks(void *locks, void (*add_lock)(void *, struct lock *), struct path_cxt *pc,
                         pid_t pid, const char *cmdname)
{
        DIR *sub = NULL;
        struct dirent *d = NULL;
        int rc = 0;

        while (ul_path_next_dirent(pc, &sub, "fdinfo", &d) == 0) {
                uint64_t num;
                FILE *fdinfo;

                if (ul_strtou64(d->d_name, &num, 10) != 0)        /* only numbers */
                        continue;

                fdinfo = ul_path_fopenf(pc, "r", "fdinfo/%ju", num);
                if (fdinfo == NULL)
                        continue;

                get_pid_lock(locks, add_lock, fdinfo, pid, cmdname, (int)num);
                fclose(fdinfo);
        }

        return rc;
}

static void get_pids_locks(void *locks, void (*add_lock)(void *, struct lock *))
{
        DIR *dir;
        struct dirent *d;
        struct path_cxt *pc = NULL;

        pc = ul_new_path(NULL);
        if (!pc)
                err(EXIT_FAILURE, _("failed to alloc procfs handler"));

        dir = opendir(_PATH_PROC);
        if (!dir)
                err(EXIT_FAILURE, _("failed to open /proc"));

        while ((d = readdir(dir))) {
                pid_t pid;
                char buf[BUFSIZ];
                const char *cmdname = NULL;

                if (procfs_dirent_get_pid(d, &pid) != 0)
                        continue;

                if (procfs_process_init_path(pc, pid) != 0)
                        continue;

                if (procfs_process_get_cmdname(pc, buf, sizeof(buf)) <= 0)
                        continue;
                cmdname = buf;

                get_pid_locks(locks, add_lock, pc, pid, cmdname);
        }

        closedir(dir);
        ul_unref_path(pc);

        return;
}

static int get_proc_locks(void *locks, void (*add_lock)(void *, struct lock *), void *fallback)
{
        FILE *fp;
        char buf[PATH_MAX];

        if (!(fp = fopen(_PATH_PROC_LOCKS, "r")))
                return -1;

        while (fgets(buf, sizeof(buf), fp)) {
                struct lock *l = get_lock(buf, NULL, fallback);
                if (l)
                        add_lock(locks, l);
        }

        fclose(fp);
        return 0;
}

static int column_name_to_id(const char *name, size_t namesz)
{
        size_t i;

        assert(name);

        for (i = 0; i < ARRAY_SIZE(infos); i++) {
                const char *cn = infos[i].name;

                if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
                        return i;
        }
        warnx(_("unknown column: %s"), name);
        return -1;
}

static inline int get_column_id(int num)
{
        assert(num >= 0);
        assert((size_t) num < ncolumns);
        assert(columns[num] < (int) ARRAY_SIZE(infos));

        return columns[num];
}


static inline const struct colinfo *get_column_info(unsigned num)
{
        return &infos[ get_column_id(num) ];
}

static pid_t get_blocker(int id, struct list_head *locks)
{
        struct list_head *p;

        list_for_each(p, locks) {
                struct lock *l = list_entry(p, struct lock, locks);

                if (l->id == id && !l->blocked)
                        return l->pid;
        }

        return 0;
}

static void xstrcoholder(char **str, struct lock *l)
{
        xstrfappend(str, "%d,%s,%d",
                    l->pid, l->cmdname, l->fd);
}

static void add_scols_line(struct libscols_table *table, struct lock *l, struct list_head *locks, void *pid_locks)
{
        size_t i;
        struct libscols_line *line;
        /*
         * Whenever cmdname or filename is NULL it is most
         * likely  because there's no read permissions
         * for the specified process.
         */
        const char *notfnd = "";

        assert(l);
        assert(table);

        line = scols_table_new_line(table, NULL);
        if (!line)
                err(EXIT_FAILURE, _("failed to allocate output line"));

        for (i = 0; i < ncolumns; i++) {
                char *str = NULL;

                switch (get_column_id(i)) {
                case COL_SRC:
                        xasprintf(&str, "%s", l->cmdname ? l->cmdname : notfnd);
                        break;
                case COL_PID:
                        xasprintf(&str, "%d", l->pid);
                        break;
                case COL_TYPE:
                        xasprintf(&str, "%s", l->type);
                        break;
                case COL_INODE:
                        xasprintf(&str, "%ju", (uintmax_t) l->inode);
                        break;
                case COL_MAJMIN:
                        if (json || raw)
                                xasprintf(&str, "%u:%u", major(l->dev), minor(l->dev));
                        else
                                xasprintf(&str, "%3u:%-3u", major(l->dev), minor(l->dev));
                        break;
                case COL_SIZE:
                        if (!l->size)
                                break;
                        if (bytes)
                                xasprintf(&str, "%ju", l->size);
                        else
                                str = size_to_human_string(SIZE_SUFFIX_1LETTER, l->size);
                        break;
                case COL_MODE:
                        xasprintf(&str, "%s%s", l->mode, l->blocked ? "*" : "");
                        break;
                case COL_M:
                        xasprintf(&str, "%d", l->mandatory ? 1 : 0);
                        break;
                case COL_START:
                        xasprintf(&str, "%jd", l->start);
                        break;
                case COL_END:
                        xasprintf(&str, "%jd", l->end);
                        break;
                case COL_PATH:
                        xasprintf(&str, "%s", l->path ? l->path : notfnd);
                        break;
                case COL_BLOCKER:
                {
                        pid_t bl = l->blocked && l->id ?
                                                get_blocker(l->id, locks) : 0;
                        if (bl)
                                xasprintf(&str, "%d", (int) bl);
                        break;
                }
                case COL_HOLDERS:
                {
                        struct lock_tnode tmp = { .dev = l->dev, .inode = l->inode, };
                        struct lock_tnode **head = tfind(&tmp, pid_locks, lock_tnode_compare);
                        struct list_head *p;

                        if (!head)
                                break;

                        list_for_each(p, &(*head)->chain) {
                                struct lock *m = list_entry(p, struct lock, locks);

                                if (!is_holder(l, m))
                                        continue;

                                if (str)
                                        xstrputc(&str, '\n');
                                xstrcoholder(&str, m);
                        }
                        break;
                }
                default:
                        break;
                }

                if (str && scols_line_refer_data(line, i, str))
                        err(EXIT_FAILURE, _("failed to add output data"));
        }
}

static void rem_locks(struct list_head *locks)
{
        struct list_head *p, *pnext;

        /* destroy the list */
        list_for_each_safe(p, pnext, locks) {
                struct lock *l = list_entry(p, struct lock, locks);
                rem_lock(l);
        }
}

static void rem_tnode(void *node)
{
        struct lock_tnode *tnode = node;

        rem_locks(&tnode->chain);
        free(node);
}

static int get_json_type_for_column(int column_id, int representing_in_bytes)
{
        switch (column_id) {
        case COL_SIZE:
                if (!representing_in_bytes)
                        return SCOLS_JSON_STRING;
                /* fallthrough */
        case COL_PID:
        case COL_START:
        case COL_END:
        case COL_BLOCKER:
        case COL_INODE:
                return SCOLS_JSON_NUMBER;
        case COL_M:
                return SCOLS_JSON_BOOLEAN;
        case COL_HOLDERS:
                return SCOLS_JSON_ARRAY_STRING;
        default:
                return SCOLS_JSON_STRING;
        }
}

static int show_locks(struct list_head *locks, pid_t target_pid, void *pid_locks)
{
        int rc = 0;
        size_t i;
        struct list_head *p;
        struct libscols_table *table;

        table = scols_new_table();
        if (!table)
                err(EXIT_FAILURE, _("failed to allocate output table"));

        scols_table_enable_raw(table, raw);
        scols_table_enable_json(table, json);
        scols_table_enable_noheadings(table, no_headings);

        if (json)
                scols_table_set_name(table, "locks");

        for (i = 0; i < ncolumns; i++) {
                struct libscols_column *cl;
                const struct colinfo *col = get_column_info(i);

                cl = scols_table_new_column(table, col->name, col->whint, col->flags);
                if (!cl)
                        err(EXIT_FAILURE, _("failed to allocate output column"));

                if (col->flags & SCOLS_FL_WRAP) {
                        scols_column_set_wrapfunc(cl,
                                                  scols_wrapnl_chunksize,
                                                  scols_wrapnl_nextchunk,
                                                  NULL);
                        scols_column_set_safechars(cl, "\n");
                }

                if (json) {
                        int id = get_column_id(i);
                        int json_type = get_json_type_for_column(id, bytes);
                        scols_column_set_json_type(cl, json_type);
                }

        }

        /* prepare data for output */
        list_for_each(p, locks) {
                struct lock *l = list_entry(p, struct lock, locks);

                if (target_pid && target_pid != l->pid)
                        continue;

                add_scols_line(table, l, locks, pid_locks);
        }

        scols_print_table(table);
        scols_unref_table(table);
        return rc;
}


static void __attribute__((__noreturn__)) usage(void)
{
        FILE *out = stdout;

        fputs(USAGE_HEADER, out);

        fprintf(out,
                _(" %s [options]\n"), program_invocation_short_name);

        fputs(USAGE_SEPARATOR, out);
        fputs(_("List local system locks.\n"), out);

        fputs(USAGE_OPTIONS, out);
        fputs(_(" -b, --bytes            print SIZE in bytes rather than in human readable format\n"), out);
        fputs(_(" -J, --json             use JSON output format\n"), out);
        fputs(_(" -i, --noinaccessible   ignore locks without read permissions\n"), out);
        fputs(_(" -n, --noheadings       don't print headings\n"), out);
        fputs(_(" -o, --output <list>    output columns (see --list-columns)\n"), out);
        fputs(_("     --output-all       output all columns\n"), out);
        fputs(_(" -p, --pid <pid>        display only locks held by this process\n"), out);
        fputs(_(" -r, --raw              use the raw output format\n"), out);
        fputs(_(" -u, --notruncate       don't truncate text in columns\n"), out);

        fputs(USAGE_SEPARATOR, out);
        fputs(_(" -H, --list-columns     list the available columns\n"), out);
        fprintf(out, USAGE_HELP_OPTIONS(24));
        fprintf(out, USAGE_MAN_TAIL("lslocks(8)"));

        exit(EXIT_SUCCESS);
}

static void __attribute__((__noreturn__)) list_colunms(void)
{
        struct libscols_table *col_tb = xcolumn_list_table_new(
                                        "lslocks-columns", stdout, raw, json);

        for (size_t i = 0; i < ARRAY_SIZE(infos); i++) {
                if (i != COL_SIZE) {
                        int json_type = get_json_type_for_column(i, bytes);
                        xcolumn_list_table_append_line(col_tb, infos[i].name,
                                                       json_type, NULL,
                                                       _(infos[i].help));
                } else
                        xcolumn_list_table_append_line(col_tb, infos[i].name,
                                                       -1, "<string|number>",
                                                       _(infos[i].help));
        }

        scols_print_table(col_tb);
        scols_unref_table(col_tb);

        exit(EXIT_SUCCESS);
}

int main(int argc, char *argv[])
{
        int c, rc = 0, collist = 0;
        struct list_head proc_locks;
        void *pid_locks = NULL;
        char *outarg = NULL;
        enum {
                OPT_OUTPUT_ALL = CHAR_MAX + 1
        };
        static const struct option long_opts[] = {
                { "bytes",      no_argument,       NULL, 'b' },
                { "json",       no_argument,       NULL, 'J' },
                { "pid",        required_argument, NULL, 'p' },
                { "help",        no_argument,       NULL, 'h' },
                { "output",     required_argument, NULL, 'o' },
                { "output-all",        no_argument,       NULL, OPT_OUTPUT_ALL },
                { "notruncate", no_argument,       NULL, 'u' },
                { "version",    no_argument,       NULL, 'V' },
                { "noheadings", no_argument,       NULL, 'n' },
                { "raw",        no_argument,       NULL, 'r' },
                { "noinaccessible", no_argument, NULL, 'i' },
                { "list-columns", no_argument,     NULL, 'H' },
                { NULL, 0, NULL, 0 }
        };

        static const ul_excl_t excl[] = {        /* rows and cols in ASCII order */
                { 'J','r' },
                { 0 }
        };
        int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
        pid_t target_pid = 0;

        setlocale(LC_ALL, "");
        bindtextdomain(PACKAGE, LOCALEDIR);
        textdomain(PACKAGE);
        close_stdout_atexit();

        while ((c = getopt_long(argc, argv,
                                "biJp:o:nruhVH", long_opts, NULL)) != -1) {

                err_exclusive_options(c, long_opts, excl, excl_st);

                switch(c) {
                case 'b':
                        bytes = 1;
                        break;
                case 'i':
                        no_inaccessible = 1;
                        break;
                case 'J':
                        json = 1;
                        break;
                case 'p':
                        target_pid = strtos32_or_err(optarg, _("invalid PID argument"));
                        break;
                case 'o':
                        outarg = optarg;
                        break;
                case OPT_OUTPUT_ALL:
                        for (ncolumns = 0; ncolumns < ARRAY_SIZE(infos); ncolumns++)
                                columns[ncolumns] = ncolumns;
                        break;
                case 'n':
                        no_headings = 1;
                        break;
                case 'r':
                        raw = 1;
                        break;
                case 'u':
                        disable_columns_truncate();
                        break;

                case 'H':
                        collist = 1;
                        break;
                case 'V':
                        print_version(EXIT_SUCCESS);
                case 'h':
                        usage();
                default:
                        errtryhelp(EXIT_FAILURE);
                }
        }

        if (collist)
                list_colunms();        /* print end exit */

        INIT_LIST_HEAD(&proc_locks);

        if (!ncolumns) {
                /* default columns */
                columns[ncolumns++] = COL_SRC;
                columns[ncolumns++] = COL_PID;
                columns[ncolumns++] = COL_TYPE;
                columns[ncolumns++] = COL_SIZE;
                columns[ncolumns++] = COL_MODE;
                columns[ncolumns++] = COL_M;
                columns[ncolumns++] = COL_START;
                columns[ncolumns++] = COL_END;
                columns[ncolumns++] = COL_PATH;
        }

        if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
                                         &ncolumns, column_name_to_id) < 0)
                return EXIT_FAILURE;

        scols_init_debug(0);

        /* get_pids_locks() get locks related information from "lock:" fields
         * of /proc/$pid/fdinfo/$fd as fallback information.
         * get_proc_locks() used the fallback information if /proc/locks
         * doesn't provides enough information or provides staled information. */
        get_pids_locks(&pid_locks, add_to_tree);
        rc = get_proc_locks(&proc_locks, add_to_list, &pid_locks);

        if (!rc && !list_empty(&proc_locks))
                rc = show_locks(&proc_locks, target_pid, &pid_locks);

        tdestroy(pid_locks, rem_tnode);
        rem_locks(&proc_locks);

        mnt_unref_table(tab);
        return rc;
}

util-linux / util-linux / 9870605403

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