diff options
author | Denis Vlasenko <vda.linux@googlemail.com> | 2009-04-19 05:27:20 +0400 |
---|---|---|
committer | Denis Vlasenko <vda.linux@googlemail.com> | 2009-04-19 05:27:20 +0400 |
commit | c7cc5a9432d2224d4e0fe3cf8ae72abb7ef25e2c (patch) | |
tree | 103a6d3e66fd142e0f2b8d57a8156b87a6f590c9 /util-linux | |
parent | 885b6f29ae2740399231427dc2c6efe47db9a80d (diff) |
mdev: Rob's #if forest removal
*: remove superfluous conts in "f(type *const param)"
Diffstat (limited to 'util-linux')
-rw-r--r-- | util-linux/mdev.c | 324 |
1 files changed, 146 insertions, 178 deletions
diff --git a/util-linux/mdev.c b/util-linux/mdev.c index 003a27b56..a3275f881 100644 --- a/util-linux/mdev.c +++ b/util-linux/mdev.c @@ -52,7 +52,7 @@ struct globals { #define G (*(struct globals*)&bb_common_bufsiz1) #define root_major (G.root_major) #define root_minor (G.root_minor) -#define subsystem (G.subsystem) +#define subsystem (G.subsystem ) /* Prevent infinite loops in /sys symlinks */ #define MAX_SYSFS_DEPTH 3 @@ -60,9 +60,9 @@ struct globals { /* We use additional 64+ bytes in make_device() */ #define SCRATCH_SIZE 80 -#if ENABLE_FEATURE_MDEV_RENAME /* Builds an alias path. * This function potentionally reallocates the alias parameter. + * Only used for ENABLE_FEATURE_MDEV_RENAME */ static char *build_alias(char *alias, const char *device_name) { @@ -84,19 +84,16 @@ static char *build_alias(char *alias, const char *device_name) return alias; } -#endif /* mknod in /dev based on a path like "/sys/block/hda/hda1" */ /* NB: "mdev -s" may call us many times, do not leak memory/fds! */ static void make_device(char *path, int delete) { -#if ENABLE_FEATURE_MDEV_CONF - parser_t *parser; -#endif const char *device_name; int major, minor, type, len; int mode; char *dev_maj_min = path + strlen(path); + parser_t *parser; /* Force the configuration file settings exactly. */ umask(0); @@ -137,170 +134,153 @@ static void make_device(char *path, int delete) else path += sizeof("/sys/class/") - 1; -#if !ENABLE_FEATURE_MDEV_CONF - mode = 0660; -#else /* If we have config file, look up user settings */ - parser = config_open2("/etc/mdev.conf", fopen_for_read); - while (1) { + if (ENABLE_FEATURE_MDEV_CONF) + parser = config_open2("/etc/mdev.conf", fopen_for_read); + + do { regmatch_t off[1 + 9 * ENABLE_FEATURE_MDEV_RENAME_REGEXP]; int keep_matching; char *val, *name; struct bb_uidgid_t ugid; char *tokens[4]; -# if ENABLE_FEATURE_MDEV_EXEC char *command = NULL; -# endif -# if ENABLE_FEATURE_MDEV_RENAME char *alias = NULL; char aliaslink = aliaslink; /* for compiler */ -# endif + /* Defaults in case we won't match any line */ ugid.uid = ugid.gid = 0; keep_matching = 0; mode = 0660; - if (!config_read(parser, tokens, 4, 3, "# \t", PARSE_NORMAL)) { - /* End of file, create dev node with default params */ - goto line_matches; - } - - val = tokens[0]; - keep_matching = ('-' == val[0]); - val += keep_matching; /* swallow leading dash */ - - /* Match against either "subsystem/device_name" - * or "device_name" alone */ - name = strchr(val, '/') ? path : (char *) device_name; - - /* Fields: regex uid:gid mode [alias] [cmd] */ - - /* 1st field: @<numeric maj,min>... */ - if (val[0] == '@') { - /* @major,minor[-last] */ - /* (useful when name is ambiguous: - * "/sys/class/usb/lp0" and - * "/sys/class/printer/lp0") */ - int cmaj, cmin0, cmin1, sc; - if (major < 0) - continue; /* no dev, no match */ - sc = sscanf(val, "@%u,%u-%u", &cmaj, &cmin0, &cmin1); - if (sc < 1 || major != cmaj - || (sc == 2 && minor != cmin0) - || (sc == 3 && (minor < cmin0 || minor > cmin1)) - ) { - continue; /* this line doesn't match */ - } - } else { /* ... or regex to match device name */ - regex_t match; - int result; - - /* Is this it? */ - xregcomp(&match, val, REG_EXTENDED); - result = regexec(&match, name, ARRAY_SIZE(off), off, 0); - regfree(&match); - - //bb_error_msg("matches:"); - //for (int i = 0; i < ARRAY_SIZE(off); i++) { - // if (off[i].rm_so < 0) continue; - // bb_error_msg("match %d: '%.*s'\n", i, - // (int)(off[i].rm_eo - off[i].rm_so), - // device_name + off[i].rm_so); - //} - - /* If not this device, skip rest of line */ - /* (regexec returns whole pattern as "range" 0) */ - if (result || off[0].rm_so - || ((int)off[0].rm_eo != (int)strlen(name)) - ) { - continue; /* this line doesn't match */ + if (ENABLE_FEATURE_MDEV_CONF + && config_read(parser, tokens, 4, 3, "# \t", PARSE_NORMAL) + ) { + val = tokens[0]; + keep_matching = ('-' == val[0]); + val += keep_matching; /* swallow leading dash */ + + /* Match against either "subsystem/device_name" + * or "device_name" alone */ + name = strchr(val, '/') ? path : (char *) device_name; + + /* Fields: regex uid:gid mode [alias] [cmd] */ + + /* 1st field: @<numeric maj,min>... */ + if (val[0] == '@') { + /* @major,minor[-last] */ + /* (useful when name is ambiguous: + * "/sys/class/usb/lp0" and + * "/sys/class/printer/lp0") */ + int cmaj, cmin0, cmin1, sc; + if (major < 0) + continue; /* no dev, no match */ + sc = sscanf(val, "@%u,%u-%u", &cmaj, &cmin0, &cmin1); + if (sc < 1 || major != cmaj + || (sc == 2 && minor != cmin0) + || (sc == 3 && (minor < cmin0 || minor > cmin1)) + ) { + continue; /* this line doesn't match */ + } + } else { /* ... or regex to match device name */ + regex_t match; + int result; + + /* Is this it? */ + xregcomp(&match, val, REG_EXTENDED); + result = regexec(&match, name, ARRAY_SIZE(off), off, 0); + regfree(&match); + + //bb_error_msg("matches:"); + //for (int i = 0; i < ARRAY_SIZE(off); i++) { + // if (off[i].rm_so < 0) continue; + // bb_error_msg("match %d: '%.*s'\n", i, + // (int)(off[i].rm_eo - off[i].rm_so), + // device_name + off[i].rm_so); + //} + + /* If not this device, skip rest of line */ + /* (regexec returns whole pattern as "range" 0) */ + if (result || off[0].rm_so + || ((int)off[0].rm_eo != (int)strlen(name)) + ) { + continue; /* this line doesn't match */ + } } - } - /* This line matches: stop parsing the file after parsing - * the rest of fields unless keep_matching == 1 */ - - /* 2nd field: uid:gid - device ownership */ - parse_chown_usergroup_or_die(&ugid, tokens[1]); - - /* 3rd field: mode - device permissions */ - mode = strtoul(tokens[2], NULL, 8); - - val = tokens[3]; - /* 4th field (opt): >|=alias */ -# if ENABLE_FEATURE_MDEV_RENAME - if (!val) - goto line_matches; - aliaslink = val[0]; - if (aliaslink == '>' || aliaslink == '=') { - char *a, *s, *st; -# if ENABLE_FEATURE_MDEV_RENAME_REGEXP - char *p; - unsigned i, n; -# endif - a = val; - s = strchrnul(val, ' '); - st = strchrnul(val, '\t'); - if (st < s) - s = st; - val = (s[0] && s[1]) ? s+1 : NULL; - s[0] = '\0'; - -# if ENABLE_FEATURE_MDEV_RENAME_REGEXP - /* substitute %1..9 with off[1..9], if any */ - n = 0; - s = a; - while (*s) - if (*s++ == '%') - n++; - - p = alias = xzalloc(strlen(a) + n * strlen(name)); - s = a + 1; - while (*s) { - *p = *s; - if ('%' == *s) { - i = (s[1] - '0'); - if (i <= 9 && off[i].rm_so >= 0) { - n = off[i].rm_eo - off[i].rm_so; - strncpy(p, name + off[i].rm_so, n); - p += n - 1; - s++; + /* This line matches: stop parsing the file after parsing + * the rest of fields unless keep_matching == 1 */ + + /* 2nd field: uid:gid - device ownership */ + parse_chown_usergroup_or_die(&ugid, tokens[1]); + + /* 3rd field: mode - device permissions */ + mode = strtoul(tokens[2], NULL, 8); + + val = tokens[3]; + /* 4th field (opt): >|=alias */ + + if (ENABLE_FEATURE_MDEV_RENAME && val) { + aliaslink = val[0]; + if (aliaslink == '>' || aliaslink == '=') { + char *a, *s, *st; + char *p; + unsigned i, n; + + a = val; + s = strchrnul(val, ' '); + st = strchrnul(val, '\t'); + if (st < s) + s = st; + val = (s[0] && s[1]) ? s+1 : NULL; + s[0] = '\0'; + + if (ENABLE_FEATURE_MDEV_RENAME_REGEXP) { + /* substitute %1..9 with off[1..9], if any */ + n = 0; + s = a; + while (*s) + if (*s++ == '%') + n++; + + p = alias = xzalloc(strlen(a) + n * strlen(name)); + s = a + 1; + while (*s) { + *p = *s; + if ('%' == *s) { + i = (s[1] - '0'); + if (i <= 9 && off[i].rm_so >= 0) { + n = off[i].rm_eo - off[i].rm_so; + strncpy(p, name + off[i].rm_so, n); + p += n - 1; + s++; + } + } + p++; + s++; + } + } else { + alias = xstrdup(a + 1); } } - p++; - s++; } -# else - alias = xstrdup(a + 1); -# endif - } -# endif /* ENABLE_FEATURE_MDEV_RENAME */ - -# if ENABLE_FEATURE_MDEV_EXEC - /* The rest (opt): @|$|*command */ - if (!val) - goto line_matches; - { - const char *s = "@$*"; - const char *s2 = strchr(s, val[0]); - - if (!s2) - bb_error_msg_and_die("bad line %u", parser->lineno); - - /* Correlate the position in the "@$*" with the delete - * step so that we get the proper behavior: - * @cmd: run on create - * $cmd: run on delete - * *cmd: run on both - */ - if ((s2 - s + 1) /*1/2/3*/ & /*1/2*/ (1 + delete)) { - command = xstrdup(val + 1); + + if (ENABLE_FEATURE_MDEV_EXEC && val) { + const char *s = "$@*"; + const char *s2 = strchr(s, val[0]); + + if (!s2) + bb_error_msg_and_die("bad line %u", parser->lineno); + + /* Are we running this command now? + * Run $cmd on delete, @cmd on create, *cmd on both + */ + if (s2-s != delete) + command = xstrdup(val + 1); } } -# endif + /* End of field parsing */ - line_matches: -#endif /* ENABLE_FEATURE_MDEV_CONF */ /* "Execute" the line we found */ @@ -311,11 +291,11 @@ static void make_device(char *path, int delete) bb_perror_msg_and_die("mknod %s", device_name); if (major == root_major && minor == root_minor) symlink(device_name, "root"); -#if ENABLE_FEATURE_MDEV_CONF - chmod(device_name, mode); - chown(device_name, ugid.uid, ugid.gid); -# if ENABLE_FEATURE_MDEV_RENAME - if (alias) { + if (ENABLE_FEATURE_MDEV_CONF) { + chmod(device_name, mode); + chown(device_name, ugid.uid, ugid.gid); + } + if (ENABLE_FEATURE_MDEV_RENAME && alias) { alias = build_alias(alias, device_name); /* move the device, and optionally * make a symlink to moved device node */ @@ -323,11 +303,9 @@ static void make_device(char *path, int delete) symlink(alias, device_name); free(alias); } -# endif -#endif } -#if ENABLE_FEATURE_MDEV_EXEC - if (command) { + + if (ENABLE_FEATURE_MDEV_EXEC && command) { /* setenv will leak memory, use putenv/unsetenv/free */ char *s = xasprintf("%s=%s", "MDEV", device_name); char *s1 = xasprintf("%s=%s", "SUBSYSTEM", subsystem); @@ -341,29 +319,29 @@ static void make_device(char *path, int delete) free(s); free(command); } -#endif + if (delete) { unlink(device_name); /* At creation time, device might have been moved * and a symlink might have been created. Undo that. */ -#if ENABLE_FEATURE_MDEV_RENAME - if (alias) { + + if (ENABLE_FEATURE_MDEV_RENAME && alias) { alias = build_alias(alias, device_name); unlink(alias); free(alias); } -#endif } -#if ENABLE_FEATURE_MDEV_CONF /* We found matching line. * Stop unless it was prefixed with '-' */ - if (!keep_matching) + if (ENABLE_FEATURE_MDEV_CONF && !keep_matching) break; - } /* end of "while line is read from /etc/mdev.conf" */ - config_close(parser); -#endif /* ENABLE_FEATURE_MDEV_CONF */ + /* end of "while line is read from /etc/mdev.conf" */ + } while (ENABLE_FEATURE_MDEV_CONF); + + if (ENABLE_FEATURE_MDEV_CONF) + config_close(parser); } /* File callback for /sys/ traversal */ @@ -415,7 +393,7 @@ static int FAST_FUNC dirAction(const char *fileName UNUSED_PARAM, * - userspace writes "0" (worked) or "-1" (failed) to /sys/$DEVPATH/loading * - kernel loads firmware into device */ -static void load_firmware(const char *const firmware, const char *const sysfs_path) +static void load_firmware(const char *firmware, const char *sysfs_path) { int cnt; int firmware_fd, loading_fd, data_fd; @@ -469,18 +447,8 @@ int mdev_main(int argc UNUSED_PARAM, char **argv) /* We can be called as hotplug helper */ /* Kernel cannot provide suitable stdio fds for us, do it ourself */ -#if 1 + bb_sanitize_stdio(); -#else - /* Debug code */ - /* Replace LOGFILE by other file or device name if you need */ -#define LOGFILE "/dev/console" - /* Just making sure fd 0 is not closed, - * we don't really intend to read from it */ - xmove_fd(xopen("/", O_RDONLY), STDIN_FILENO); - xmove_fd(xopen(LOGFILE, O_WRONLY|O_APPEND), STDOUT_FILENO); - xmove_fd(xopen(LOGFILE, O_WRONLY|O_APPEND), STDERR_FILENO); -#endif xchdir("/dev"); |