X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_utils.c;h=de43dee30d032b7fd95f865db9f89f9a285eb64f;hp=073cde1074f921ef920a44aeddb5aa5fb2189875;hb=db481105c2cf2092e1499736d6619bf194f91711;hpb=aaff09a30ab849186c0d4ad8bde83876d7a1a63d diff --git a/udev_utils.c b/udev_utils.c index 073cde107..de43dee30 100644 --- a/udev_utils.c +++ b/udev_utils.c @@ -1,7 +1,7 @@ /* - * udev_lib - generic stuff used by udev + * udev_utils.c - generic stuff used by udev * - * Copyright (C) 2004 Kay Sievers + * Copyright (C) 2004-2005 Kay Sievers * * 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 @@ -28,9 +28,6 @@ #include #include #include -#include -#include -#include #include #include "udev_libc_wrapper.h" @@ -39,84 +36,57 @@ #include "udev_utils.h" #include "list.h" - -int udev_init_device(struct udevice *udev, const char* devpath, const char *subsystem, const char *action) +/* compare string with pattern (supports * ? [0-9] [!A-Z]) */ +int strcmp_pattern(const char *p, const char *s) { - char *pos; - - memset(udev, 0x00, sizeof(struct udevice)); - INIT_LIST_HEAD(&udev->symlink_list); - INIT_LIST_HEAD(&udev->run_list); - INIT_LIST_HEAD(&udev->env_list); - - if (subsystem) - strlcpy(udev->subsystem, subsystem, sizeof(udev->subsystem)); - - if (action) - strlcpy(udev->action, action, sizeof(udev->action)); - - if (devpath) { - strlcpy(udev->devpath, devpath, sizeof(udev->devpath)); - remove_trailing_char(udev->devpath, '/'); - - if (strncmp(udev->devpath, "/block/", 7) == 0) - udev->type = DEV_BLOCK; - else if (strncmp(udev->devpath, "/class/net/", 11) == 0) - udev->type = DEV_NET; - else if (strncmp(udev->devpath, "/class/", 7) == 0) - udev->type = DEV_CLASS; - else if (strncmp(udev->devpath, "/devices/", 9) == 0) - udev->type = DEV_DEVICE; - - /* get kernel name */ - pos = strrchr(udev->devpath, '/'); - if (pos) { - strlcpy(udev->kernel_name, &pos[1], sizeof(udev->kernel_name)); - dbg("kernel_name='%s'", udev->kernel_name); - - /* Some block devices have '!' in their name, change that to '/' */ - pos = udev->kernel_name; - while (pos[0] != '\0') { - if (pos[0] == '!') - pos[0] = '/'; - pos++; + if (s[0] == '\0') { + while (p[0] == '*') + p++; + return (p[0] != '\0'); + } + switch (p[0]) { + case '[': + { + int not = 0; + p++; + if (p[0] == '!') { + not = 1; + p++; + } + while ((p[0] != '\0') && (p[0] != ']')) { + int match = 0; + if (p[1] == '-') { + if ((s[0] >= p[0]) && (s[0] <= p[2])) + match = 1; + p += 3; + } else { + match = (p[0] == s[0]); + p++; + } + if (match ^ not) { + while ((p[0] != '\0') && (p[0] != ']')) + p++; + if (p[0] == ']') + return strcmp_pattern(p+1, s+1); + } } - - /* get kernel number */ - pos = &udev->kernel_name[strlen(udev->kernel_name)]; - while (isdigit(pos[-1])) - pos--; - strlcpy(udev->kernel_number, pos, sizeof(udev->kernel_number)); - dbg("kernel_number='%s'", udev->kernel_number); } + break; + case '*': + if (strcmp_pattern(p, s+1)) + return strcmp_pattern(p+1, s); + return 0; + case '\0': + if (s[0] == '\0') { + return 0; + } + break; + default: + if ((p[0] == s[0]) || (p[0] == '?')) + return strcmp_pattern(p+1, s+1); + break; } - - if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS) { - udev->mode = 0660; - strcpy(udev->owner, "root"); - strcpy(udev->group, "root"); - } - - return 0; -} - -void udev_cleanup_device(struct udevice *udev) -{ - struct name_entry *name_loop; - struct name_entry *temp_loop; - - list_for_each_entry_safe(name_loop, temp_loop, &udev->symlink_list, node) { - list_del(&name_loop->node); - free(name_loop); - } - list_for_each_entry_safe(name_loop, temp_loop, &udev->run_list, node) { - list_del(&name_loop->node); - free(name_loop); - } - list_for_each_entry_safe(name_loop, temp_loop, &udev->env_list, node) { - list_del(&name_loop->node); - free(name_loop); - } + return 1; } int string_is_true(const char *str) @@ -173,109 +143,6 @@ int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, u return 0; } -int create_path(const char *path) -{ - char p[PATH_SIZE]; - char *pos; - struct stat stats; - - strcpy (p, path); - pos = strrchr(p, '/'); - if (pos == p || pos == NULL) - return 0; - - while (pos[-1] == '/') - pos--; - - pos[0] = '\0'; - - dbg("stat '%s'\n", p); - if (stat (p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR) - return 0; - - if (create_path (p) != 0) - return -1; - - dbg("mkdir '%s'\n", p); - return mkdir(p, 0755); -} - -/* Reset permissions on the device node, before unlinking it to make sure, - * that permisions of possible hard links will be removed too. - */ -int unlink_secure(const char *filename) -{ - int retval; - - retval = chown(filename, 0, 0); - if (retval) - dbg("chown(%s, 0, 0) failed with error '%s'", filename, strerror(errno)); - - retval = chmod(filename, 0000); - if (retval) - dbg("chmod(%s, 0000) failed with error '%s'", filename, strerror(errno)); - - retval = unlink(filename); - if (errno == ENOENT) - retval = 0; - - if (retval) - dbg("unlink(%s) failed with error '%s'", filename, strerror(errno)); - - return retval; -} - -int file_map(const char *filename, char **buf, size_t *bufsize) -{ - struct stat stats; - int fd; - - fd = open(filename, O_RDONLY); - if (fd < 0) { - return -1; - } - - if (fstat(fd, &stats) < 0) { - close(fd); - return -1; - } - - *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0); - if (*buf == MAP_FAILED) { - close(fd); - return -1; - } - *bufsize = stats.st_size; - - close(fd); - - return 0; -} - -void file_unmap(void *buf, size_t bufsize) -{ - munmap(buf, bufsize); -} - -/* return number of chars until the next newline, skip escaped newline */ -size_t buf_get_line(const char *buf, size_t buflen, size_t cur) -{ - int escape = 0; - size_t count; - - for (count = cur; count < buflen; count++) { - if (!escape && buf[count] == '\n') - break; - - if (buf[count] == '\\') - escape = 1; - else - escape = 0; - } - - return count - cur; -} - void replace_untrusted_chars(char *string) { size_t len; @@ -398,110 +265,3 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c closedir(dir); return 0; } - -int execute_program(const char *command, const char *subsystem, - char *result, size_t ressize, size_t *reslen) -{ - int retval = 0; - int count; - int status; - int pipefds[2]; - pid_t pid; - char *pos; - char arg[PATH_SIZE]; - char *argv[(sizeof(arg) / 2) + 1]; - int devnull; - int i; - size_t len; - - strlcpy(arg, command, sizeof(arg)); - i = 0; - if (strchr(arg, ' ')) { - pos = arg; - while (pos != NULL) { - if (pos[0] == '\'') { - /* don't separate if in apostrophes */ - pos++; - argv[i] = strsep(&pos, "\'"); - while (pos && pos[0] == ' ') - pos++; - } else { - argv[i] = strsep(&pos, " "); - } - dbg("arg[%i] '%s'", i, argv[i]); - i++; - } - argv[i] = NULL; - dbg("execute '%s' with parsed arguments", arg); - } else { - argv[0] = arg; - argv[1] = (char *) subsystem; - argv[2] = NULL; - dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]); - } - - if (result) { - if (pipe(pipefds) != 0) { - err("pipe failed"); - return -1; - } - } - - pid = fork(); - switch(pid) { - case 0: - /* child dup2 write side of pipe to STDOUT */ - devnull = open("/dev/null", O_RDWR); - if (devnull >= 0) { - dup2(devnull, STDIN_FILENO); - if (!result) - dup2(devnull, STDOUT_FILENO); - dup2(devnull, STDERR_FILENO); - close(devnull); - } - if (result) - dup2(pipefds[1], STDOUT_FILENO); - execv(arg, argv); - err("exec of program failed"); - _exit(1); - case -1: - err("fork of '%s' failed", arg); - return -1; - default: - /* parent reads from pipefds[0] */ - if (result) { - close(pipefds[1]); - len = 0; - while (1) { - count = read(pipefds[0], result + len, ressize - len-1); - if (count < 0) { - err("read failed with '%s'", strerror(errno)); - retval = -1; - break; - } - - if (count == 0) - break; - - len += count; - if (len >= ressize-1) { - err("ressize %ld too short", (long)ressize); - retval = -1; - break; - } - } - result[len] = '\0'; - close(pipefds[0]); - if (reslen) - *reslen = len; - } - waitpid(pid, &status, 0); - - if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { - dbg("exec program status 0x%x", status); - retval = -1; - } - } - - return retval; -}