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On Thu, Mar 25, 2004 at 02:52:13AM +0100, Kay Sievers wrote: > Please have look if it still works for you, I only did a very quick > test. Here is a unified version, with all the functions moved to udev_lib.c. We have a generic function now, to call a given fnct(char *) for every file ending with a specific suffix, sorted in lexical order. We use it to execute the dev.d/ files and read our rules.d/ files. The binary should be a bit smaller now. I've also changed it, to not do the dev.d/ exec for net devices.
225 lines
4.4 KiB
C
225 lines
4.4 KiB
C
/*
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* udev_lib - generic stuff used by udev
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*
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* Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include "libsysfs/sysfs/libsysfs.h"
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#include "udev.h"
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#include "logging.h"
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#include "udev_lib.h"
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#include "list.h"
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char *get_action(void)
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{
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char *action;
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action = getenv("ACTION");
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if (action != NULL && strlen(action) > ACTION_SIZE)
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action[ACTION_SIZE-1] = '\0';
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return action;
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}
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char *get_devpath(void)
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{
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char *devpath;
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devpath = getenv("DEVPATH");
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if (devpath != NULL && strlen(devpath) > DEVPATH_SIZE)
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devpath[DEVPATH_SIZE-1] = '\0';
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return devpath;
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}
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char *get_devnode(void)
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{
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char *devnode;
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devnode = getenv("DEVNODE");
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if (devnode != NULL && strlen(devnode) > NAME_SIZE)
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devnode[NAME_SIZE-1] = '\0';
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return devnode;
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}
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char *get_seqnum(void)
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{
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char *seqnum;
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seqnum = getenv("SEQNUM");
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return seqnum;
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}
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char *get_subsystem(char *subsystem)
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{
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if (subsystem != NULL && strlen(subsystem) > SUBSYSTEM_SIZE)
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subsystem[SUBSYSTEM_SIZE-1] = '\0';
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return subsystem;
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}
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char get_device_type(const char *path, const char *subsystem)
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{
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if (strcmp(subsystem, "block") == 0 ||
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strstr(path, "/block/") != NULL)
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return 'b';
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if (strcmp(subsystem, "net") == 0 ||
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strstr(path, "/class/net/") != NULL)
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return 'n';
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if (strstr(path, "/class/") != NULL)
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return 'c';
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return '\0';
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}
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int file_map(const char *filename, char **buf, size_t *bufsize)
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{
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struct stat stats;
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int fd;
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fd = open(filename, O_RDONLY);
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if (fd < 0) {
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return -1;
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}
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if (fstat(fd, &stats) < 0) {
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return -1;
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}
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*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
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if (*buf == MAP_FAILED) {
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return -1;
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}
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*bufsize = stats.st_size;
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close(fd);
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return 0;
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}
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void file_unmap(char *buf, size_t bufsize)
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{
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munmap(buf, bufsize);
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}
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size_t buf_get_line(char *buf, size_t buflen, size_t cur)
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{
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size_t count = 0;
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for (count = cur; count < buflen && buf[count] != '\n'; count++);
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return count - cur;
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}
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struct files {
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struct list_head list;
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char name[NAME_SIZE];
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};
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/* sort files in lexical order */
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static int file_list_insert(char *filename, struct list_head *file_list)
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{
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struct files *loop_file;
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struct files *new_file;
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list_for_each_entry(loop_file, file_list, list) {
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if (strcmp(loop_file->name, filename) > 0) {
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break;
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}
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}
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new_file = malloc(sizeof(struct files));
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if (new_file == NULL) {
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dbg("error malloc");
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return -ENOMEM;
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}
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strfieldcpy(new_file->name, filename);
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list_add_tail(&new_file->list, &loop_file->list);
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return 0;
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}
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/* calls function for file or every file found in directory */
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int call_foreach_file(int fnct(char *f) , char *dirname, char *suffix)
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{
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struct dirent *ent;
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DIR *dir;
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char *ext;
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char file[NAME_SIZE];
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struct files *loop_file;
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struct files *tmp_file;
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LIST_HEAD(file_list);
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dbg("open directory '%s'", dirname);
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dir = opendir(dirname);
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if (dir == NULL) {
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dbg("unable to open '%s'", dirname);
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return -1;
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}
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while (1) {
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ent = readdir(dir);
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if (ent == NULL || ent->d_name[0] == '\0')
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break;
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if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER))
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continue;
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/* look for file with specified suffix */
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ext = strrchr(ent->d_name, '.');
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if (ext == NULL)
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continue;
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if (strcmp(ext, suffix) != 0)
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continue;
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dbg("put file '%s/%s' in list", dirname, ent->d_name);
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file_list_insert(ent->d_name, &file_list);
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}
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/* call function for every file in the list */
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list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) {
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strfieldcpy(file, dirname);
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strfieldcat(file, "/");
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strfieldcat(file, loop_file->name);
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fnct(file);
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list_del(&loop_file->list);
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free(loop_file);
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}
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closedir(dir);
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return 0;
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}
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