VERSION = 1
PATCHLEVEL = 10
-SUBLEVEL = 1
+SUBLEVEL = 2
EXTRAVERSION =
NAME = Unnamed
archive_handle->offset += 512;
/* If there is no filename its an empty header */
- if (tar.name[0] == 0) {
+ if (tar.name[0] == 0 && tar.prefix[0] == 0) {
if (end) {
/* This is the second consecutive empty header! End of archive!
* Read until the end to empty the pipe from gz or bz2
/* getOctal trashes subsequent field, therefore we call it
* on fields in reverse order */
if (tar.devmajor[0]) {
+ char t = tar.prefix[0];
+ /* we trash prefix[0] here, but we DO need it later! */
unsigned minor = GET_OCTAL(tar.devminor);
unsigned major = GET_OCTAL(tar.devmajor);
file_header->device = makedev(major, minor);
+ tar.prefix[0] = t;
}
file_header->link_target = NULL;
if (!linkname && parse_names && tar.linkname[0]) {
/* This is a NOFORK applet. Be very careful! */
-/* argc is unused, but removing it precludes compiler from
- * using call -> jump optimization */
+/* NB: can be used by shell even if not enabled as applet */
-int echo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int echo_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
const char *arg;
}
#if !ENABLE_FEATURE_FANCY_ECHO
/* SUSv3 specifies that octal escapes must begin with '0'. */
- if ( (((unsigned char)*arg) - '1') >= 7)
+ if ( ((int)(unsigned char)(*arg) - '0') >= 8) /* '8' or bigger */
#endif
{
/* Since SUSv3 mandates a first digit of 0, 4-digit octals
* of the form \0### are accepted. */
- if (*arg == '0' && ((unsigned char)(arg[1]) - '0') < 8) {
- arg++;
+ if (*arg == '0') {
+ /* NB: don't turn "...\0" into "...\" */
+ if (arg[1] && ((unsigned char)(arg[1]) - '0') < 8) {
+ arg++;
+ }
}
- /* bb_process_escape_sequence can handle nul correctly */
+ /* bb_process_escape_sequence handles NUL correctly
+ * ("...\" case). */
c = bb_process_escape_sequence(&arg);
}
}
/* NB: we have a problem here with /proc/NN/exe usage, similar to
* one fixed in killall/pidof */
-#include <getopt.h>
#include <sys/resource.h>
/* Override ENABLE_FEATURE_PIDFILE */
int user_id;
smallint quiet;
smallint signal_nr;
+ struct stat execstat;
};
#define G (*(struct globals*)&bb_common_bufsiz1)
#define found (G.found )
#define user_id (G.user_id )
#define quiet (G.quiet )
#define signal_nr (G.signal_nr )
+#define execstat (G.execstat )
#define INIT_G() \
do { \
user_id = -1; \
} while (0)
-static int pid_is_exec(pid_t pid, const char *name)
+static int pid_is_exec(pid_t pid)
{
+ struct stat st;
char buf[sizeof("/proc//exe") + sizeof(int)*3];
- char *execbuf;
- int n;
sprintf(buf, "/proc/%u/exe", pid);
- n = strlen(name) + 1;
- execbuf = xzalloc(n + 1);
- readlink(buf, execbuf, n);
- /* if readlink fails because link target is longer than strlen(name),
- * execbuf still contains "", and strcmp will return !0. */
- n = strcmp(execbuf, name);
- if (ENABLE_FEATURE_CLEAN_UP)
- free(execbuf);
- return !n; /* nonzero (true) if execbuf == name */
+ if (stat(buf, &st) < 0)
+ return 0;
+ if (st.st_dev == execstat.st_dev
+ && st.st_ino == execstat.st_ino)
+ return 1;
+ return 0;
}
-static int pid_is_user(int pid, int uid)
+static int pid_is_user(int pid)
{
struct stat sb;
char buf[sizeof("/proc/") + sizeof(int)*3];
sprintf(buf, "/proc/%u", pid);
if (stat(buf, &sb) != 0)
return 0;
- return (sb.st_uid == uid);
+ return (sb.st_uid == user_id);
}
-static int pid_is_cmd(pid_t pid, const char *name)
+static int pid_is_cmd(pid_t pid)
{
- char fname[sizeof("/proc//stat") + sizeof(int)*3];
- char *buf;
- int r = 0;
-
- sprintf(fname, "/proc/%u/stat", pid);
- buf = xmalloc_open_read_close(fname, NULL);
- if (buf) {
- char *p = strchr(buf, '(');
- if (p) {
- char *pe = strrchr(++p, ')');
- if (pe) {
- *pe = '\0';
- r = !strcmp(p, name);
- }
- }
- free(buf);
- }
- return r;
+ char buf[256]; /* is it big enough? */
+ char *p, *pe;
+
+ sprintf(buf, "/proc/%u/stat", pid);
+ if (open_read_close(buf, buf, sizeof(buf) - 1) < 0)
+ return 0;
+ buf[sizeof(buf) - 1] = '\0'; /* paranoia */
+ p = strchr(buf, '(');
+ if (!p)
+ return 0;
+ pe = strrchr(++p, ')');
+ if (!pe)
+ return 0;
+ *pe = '\0';
+ return !strcmp(p, cmdname);
}
static void check(int pid)
{
struct pid_list *p;
- if (execname && !pid_is_exec(pid, execname)) {
+ if (execname && !pid_is_exec(pid)) {
return;
}
- if (userspec && !pid_is_user(pid, user_id)) {
+ if (userspec && !pid_is_user(pid)) {
return;
}
- if (cmdname && !pid_is_cmd(pid, cmdname)) {
+ if (cmdname && !pid_is_cmd(pid)) {
return;
}
p = xmalloc(sizeof(*p));
procdir = xopendir("/proc");
pid = 0;
- while ((entry = readdir(procdir)) != NULL) {
+ while(1) {
+ errno = 0; /* clear any previous error */
+ entry = readdir(procdir);
+// TODO: check for exact errno(s) which mean that we got stale entry
+ if (errno) /* Stale entry, process has died after opendir */
+ continue;
+ if (!entry) /* EOF, no more entries */
+ break;
pid = bb_strtou(entry->d_name, NULL, 10);
- if (errno)
+ if (errno) /* NaN */
continue;
check(pid);
}
struct pid_list *p;
int killed = 0;
- do_procinit();
-
if (cmdname) {
if (ENABLE_FEATURE_CLEAN_UP) what = xstrdup(cmdname);
if (!ENABLE_FEATURE_CLEAN_UP) what = cmdname;
};
int start_stop_daemon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int start_stop_daemon_main(int argc, char **argv)
+int start_stop_daemon_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
unsigned opt;
char *signame;
// if (retry_arg)
// retries = xatoi_u(retry_arg);
// )
- argc -= optind;
+ //argc -= optind;
argv += optind;
if (userspec) {
if (errno)
user_id = xuname2uid(userspec);
}
+ if (execname)
+ xstat(execname, &execstat);
+
+ do_procinit(); /* Both start and stop needs to know current processes */
if (opt & CTX_STOP) {
int i = do_stop();
return (opt & OPT_OKNODO) ? 0 : (i <= 0);
}
- do_procinit();
-
if (found) {
if (!quiet)
printf("%s already running\n%d\n", execname, found->pid);
* SIGSYS Bad argument to routine
* SIGTRAP Trace/breakpoint trap
*/
- BB_FATAL_SIGS = 0
- + (1 << SIGHUP)
- + (1 << SIGINT)
- + (1 << SIGTERM)
- + (1 << SIGPIPE) // Write to pipe with no readers
- + (1 << SIGQUIT) // Quit from keyboard
- + (1 << SIGABRT) // Abort signal from abort(3)
- + (1 << SIGALRM) // Timer signal from alarm(2)
- + (1 << SIGVTALRM) // Virtual alarm clock
- + (1 << SIGXCPU) // CPU time limit exceeded
- + (1 << SIGXFSZ) // File size limit exceeded
- + (1 << SIGUSR1) // Yes kids, these are also fatal!
- + (1 << SIGUSR2)
- + 0,
+ BB_FATAL_SIGS = (int)(0
+ + (1LL << SIGHUP)
+ + (1LL << SIGINT)
+ + (1LL << SIGTERM)
+ + (1LL << SIGPIPE) // Write to pipe with no readers
+ + (1LL << SIGQUIT) // Quit from keyboard
+ + (1LL << SIGABRT) // Abort signal from abort(3)
+ + (1LL << SIGALRM) // Timer signal from alarm(2)
+ + (1LL << SIGVTALRM) // Virtual alarm clock
+ + (1LL << SIGXCPU) // CPU time limit exceeded
+ + (1LL << SIGXFSZ) // File size limit exceeded
+ + (1LL << SIGUSR1) // Yes kids, these are also fatal!
+ + (1LL << SIGUSR2)
+ + 0),
};
void bb_signals(int sigs, void (*f)(int));
/* Unlike signal() and bb_signals, sets handler with sigaction()
/* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
int get_terminal_width_height(int fd, int *width, int *height);
-int ioctl_or_perror(int fd, int request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5)));
-void ioctl_or_perror_and_die(int fd, int request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5)));
+int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5)));
+void ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5)));
#if ENABLE_IOCTL_HEX2STR_ERROR
-int bb_ioctl_or_warn(int fd, int request, void *argp, const char *ioctl_name);
-void bb_xioctl(int fd, int request, void *argp, const char *ioctl_name);
+int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name);
+void bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name);
#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
#else
-int bb_ioctl_or_warn(int fd, int request, void *argp);
-void bb_xioctl(int fd, int request, void *argp);
+int bb_ioctl_or_warn(int fd, unsigned request, void *argp);
+void bb_xioctl(int fd, unsigned request, void *argp);
#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
#endif
for (i = 0; i < npaths; i++) {
dir = opendir(paths[i]);
- if (!dir) /* Don't print an error */
- continue;
+ if (!dir)
+ continue; /* don't print an error */
while ((next = readdir(dir)) != NULL) {
int len1;
if (strncmp(str_found, pfind, strlen(pfind)))
continue;
/* not see .name without .match */
- if (*str_found == '.' && *pfind == 0) {
+ if (*str_found == '.' && *pfind == '\0') {
if (NOT_LONE_CHAR(paths[i], '/') || str_found[1])
continue;
str_found = ""; /* only "/" */
}
found = concat_path_file(paths[i], str_found);
- /* hmm, remover in progress? */
- if (lstat(found, &st) < 0)
+ /* hmm, remove in progress? */
+ /* NB: stat() first so that we see is it a directory;
+ * but if that fails, use lstat() so that
+ * we still match dangling links */
+ if (stat(found, &st) && lstat(found, &st))
goto cont;
/* find with dirs? */
if (paths[i] != dirbuf)
- strcpy(found, next->d_name); /* only name */
+ strcpy(found, next->d_name); /* only name */
len1 = strlen(found);
found = xrealloc(found, len1 + 2);
found[len1+1] = '\0';
if (S_ISDIR(st.st_mode)) {
- /* name is directory */
+ /* name is a directory */
if (found[len1-1] != '/') {
found[len1] = '/';
}
closedir(dir);
}
if (paths != path1) {
- free(paths[0]); /* allocated memory only in first member */
+ free(paths[0]); /* allocated memory is only in first member */
free(paths);
}
#undef dirbuf
&sp->start_time,
&vsz,
&rss);
- if (n != 10)
+ if (n != 11)
break;
/* vsz is in bytes and we want kb */
sp->vsz = vsz >> 10;
return ret;
}
-void ioctl_or_perror_and_die(int fd, int request, void *argp, const char *fmt,...)
+void ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...)
{
va_list p;
}
}
-int ioctl_or_perror(int fd, int request, void *argp, const char *fmt,...)
+int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...)
{
va_list p;
int ret = ioctl(fd, request, argp);
}
#if ENABLE_IOCTL_HEX2STR_ERROR
-int bb_ioctl_or_warn(int fd, int request, void *argp, const char *ioctl_name)
+int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name)
{
int ret;
bb_simple_perror_msg(ioctl_name);
return ret;
}
-void bb_xioctl(int fd, int request, void *argp, const char *ioctl_name)
+void bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name)
{
if (ioctl(fd, request, argp) < 0)
bb_simple_perror_msg_and_die(ioctl_name);
}
#else
-int bb_ioctl_or_warn(int fd, int request, void *argp)
+int bb_ioctl_or_warn(int fd, unsigned request, void *argp)
{
int ret;
bb_perror_msg("ioctl %#x failed", request);
return ret;
}
-void bb_xioctl(int fd, int request, void *argp)
+void bb_xioctl(int fd, unsigned request, void *argp)
{
if (ioctl(fd, request, argp) < 0)
bb_perror_msg_and_die("ioctl %#x failed", request);
unsigned i;
/* Do not allow zero mask: */
unsigned long long m = xstrtoull_range(aff, 0, 1, ULLONG_MAX);
+ enum { CNT_BIT = CPU_SETSIZE < sizeof(m)*8 ? CPU_SETSIZE : sizeof(m)*8 };
+
CPU_ZERO(&mask);
- for (i = 0; i < CPU_SETSIZE; i++) {
+ for (i = 0; i < CNT_BIT; i++) {
unsigned long long bit = (1ULL << i);
if (bit & m)
CPU_SET(i, &mask);
}
}
#endif
+ /* restore default signal dispositions for CGI process */
+ signal(SIGCHLD, SIG_DFL);
+ signal(SIGPIPE, SIG_DFL);
+ signal(SIGHUP, SIG_DFL);
+
execv(fullpath, argv);
if (verbose)
bb_perror_msg("exec %s", fullpath);
#if defined(__GLIBC__) && !defined(__UCLIBC__)
syntax error here
#endif
- " >"$tempname"
+ " >"$tempname".c
if $CC "$tempname".c -c -o "$tempname".o >/dev/null 2>&1; then
echo "$2";
else
#include "libbb.h"
#include "xregex.h"
+#define ENABLE_FEATURE_MDEV_RENAME_REGEXP 1
+
struct globals {
int root_major, root_minor;
};
#define MAX_SYSFS_DEPTH 3 /* prevent infinite loops in /sys symlinks */
+/* We use additional 64+ bytes in make_device() */
+#define SCRATCH_SIZE 80
+
+static char *next_field(char *s)
+{
+ char *end = skip_non_whitespace(s);
+ s = skip_whitespace(end);
+ *end = '\0';
+ if (*s == '\0')
+ s = NULL;
+ return s;
+}
+
/* 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)
{
const char *device_name;
int mode = 0660;
uid_t uid = 0;
gid_t gid = 0;
- char *temp = path + strlen(path);
+ char *dev_maj_min = path + strlen(path);
char *command = NULL;
char *alias = NULL;
* also depend on path having writeable space after it.
*/
if (!delete) {
- strcat(path, "/dev");
- len = open_read_close(path, temp + 1, 64);
- *temp++ = 0;
+ strcpy(dev_maj_min, "/dev");
+ len = open_read_close(path, dev_maj_min + 1, 64);
+ *dev_maj_min++ = '\0';
if (len < 1) {
- if (ENABLE_FEATURE_MDEV_EXEC)
- /* no "dev" file, so just try to run script */
- *temp = 0;
- else
+ if (!ENABLE_FEATURE_MDEV_EXEC)
return;
+ /* no "dev" file, so just try to run script */
+ *dev_maj_min = '\0';
}
}
/* Determine device name, type, major and minor */
device_name = bb_basename(path);
- type = (path[5] == 'c' ? S_IFCHR : S_IFBLK);
+ /* http://kernel.org/doc/pending/hotplug.txt says that only
+ * "/sys/block/..." is for block devices. "sys/bus" etc is not! */
+ type = (strncmp(&path[5], "block/", 6) == 0 ? S_IFBLK : S_IFCHR);
if (ENABLE_FEATURE_MDEV_CONF) {
FILE *fp;
- char *line, *vline;
+ char *line, *val, *next;
unsigned lineno = 0;
- /* If we have a config file, look up the user settings */
+ /* If we have config file, look up user settings */
fp = fopen_or_warn("/etc/mdev.conf", "r");
if (!fp)
goto end_parse;
- while ((vline = line = xmalloc_getline(fp)) != NULL) {
- int field;
-
- /* A pristine copy for command execution. */
- char *orig_line;
- if (ENABLE_FEATURE_MDEV_EXEC)
- orig_line = xstrdup(line);
+ while ((line = xmalloc_getline(fp)) != NULL) {
+ regmatch_t off[1+9*ENABLE_FEATURE_MDEV_RENAME_REGEXP];
++lineno;
+ trim(line);
+ if (!line[0])
+ goto next_line;
+
+ /* Fields: regex uid:gid mode [alias] [cmd] */
+
+ /* 1st field: regex to match this device */
+ next = next_field(line);
+ {
+ regex_t match;
+ int result;
+
+ /* Is this it? */
+ xregcomp(&match, line, REG_EXTENDED);
+ result = regexec(&match, device_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 || off[0].rm_eo != strlen(device_name))
+ goto next_line;
+ }
- /* Three fields: regex, uid:gid, mode */
- for (field = 0; field < (3 + ENABLE_FEATURE_MDEV_RENAME + ENABLE_FEATURE_MDEV_EXEC); ++field) {
-
- /* Find a non-empty field */
- char *val;
- do {
- val = strtok(vline, " \t");
- vline = NULL;
- } while (val && !*val);
- if (!val) {
- if (field)
- break;
- else
- goto next_line;
- }
-
- if (field == 0) {
-
- /* Regex to match this device */
- regex_t match;
- regmatch_t off;
- int result;
-
- /* Is this it? */
- xregcomp(&match, val, REG_EXTENDED);
- result = regexec(&match, device_name, 1, &off, 0);
- regfree(&match);
-
- /* If not this device, skip rest of line */
- if (result || off.rm_so || off.rm_eo != strlen(device_name))
- goto next_line;
-
- } else if (field == 1) {
-
- /* uid:gid device ownership */
- struct passwd *pass;
- struct group *grp;
-
- char *str_uid = val;
- char *str_gid = strchr(val, ':');
- if (str_gid)
- *str_gid = '\0', ++str_gid;
-
- /* Parse UID */
- pass = getpwnam(str_uid);
- if (pass)
- uid = pass->pw_uid;
- else
- uid = strtoul(str_uid, NULL, 10);
-
- /* parse GID */
- grp = getgrnam(str_gid);
- if (grp)
- gid = grp->gr_gid;
- else
- gid = strtoul(str_gid, NULL, 10);
-
- } else if (field == 2) {
-
- /* Mode device permissions */
- mode = strtoul(val, NULL, 8);
-
- } else if (ENABLE_FEATURE_MDEV_RENAME && field == 3) {
-
- if (*val != '>')
- ++field;
- else
- alias = xstrdup(val + 1);
-
- }
-
- if (ENABLE_FEATURE_MDEV_EXEC && field == 3 + ENABLE_FEATURE_MDEV_RENAME) {
+ /* This line matches: stop parsing the file
+ * after parsing the rest of fields */
- /* Optional command to run */
- const char *s = "@$*";
- const char *s2 = strchr(s, *val);
+ /* 2nd field: uid:gid - device ownership */
+ if (!next) /* field must exist */
+ bb_error_msg_and_die("bad line %u", lineno);
+ val = next;
+ next = next_field(val);
+ {
+ struct passwd *pass;
+ struct group *grp;
+ char *str_uid = val;
+ char *str_gid = strchrnul(val, ':');
+
+ if (*str_gid)
+ *str_gid++ = '\0';
+ /* Parse UID */
+ pass = getpwnam(str_uid);
+ if (pass)
+ uid = pass->pw_uid;
+ else
+ uid = strtoul(str_uid, NULL, 10);
+ /* Parse GID */
+ grp = getgrnam(str_gid);
+ if (grp)
+ gid = grp->gr_gid;
+ else
+ gid = strtoul(str_gid, NULL, 10);
+ }
- if (!s2) {
- /* Force error */
- field = 1;
- break;
+ /* 3rd field: mode - device permissions */
+ if (!next) /* field must exist */
+ bb_error_msg_and_die("bad line %u", lineno);
+ val = next;
+ next = next_field(val);
+ mode = strtoul(val, NULL, 8);
+
+ /* 4th field (opt): >alias */
+ if (ENABLE_FEATURE_MDEV_RENAME) {
+ if (!next)
+ break;
+ if (*next == '>') {
+#if ENABLE_FEATURE_MDEV_RENAME_REGEXP
+ char *s, *p;
+ unsigned i, n;
+#endif
+ val = next;
+ next = next_field(val);
+#if ENABLE_FEATURE_MDEV_RENAME_REGEXP
+ /* substitute %1..9 with off[1..9], if any */
+ n = 0;
+ s = val;
+ while (*s && *s++ == '%')
+ n++;
+
+ p = alias = xzalloc(strlen(val) + n * strlen(device_name));
+ s = val + 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, device_name + off[i].rm_so, n);
+ p += n - 1;
+ s++;
+ }
+ }
+ p++;
+ s++;
}
-
- /* Correlate the position in the "@$*" with the delete
- * step so that we get the proper behavior.
- */
- if ((s2 - s + 1) & (1 << delete))
- command = xstrdup(orig_line + (val + 1 - line));
+#else
+ alias = xstrdup(val + 1);
+#endif
}
}
- /* Did everything parse happily? */
- if (field <= 2)
- bb_error_msg_and_die("bad line %u", lineno);
-
+ /* The rest (opt): command to run */
+ if (!next)
+ break;
+ val = next;
+ if (ENABLE_FEATURE_MDEV_EXEC) {
+ const char *s = "@$*";
+ const char *s2 = strchr(s, *val);
+
+ if (!s2)
+ bb_error_msg_and_die("bad line %u", 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);
+ }
+ }
+ /* end of field parsing */
+ break; /* we found matching line, stop */
next_line:
free(line);
- if (ENABLE_FEATURE_MDEV_EXEC)
- free(orig_line);
- }
-
- if (ENABLE_FEATURE_CLEAN_UP)
- fclose(fp);
+ } /* end of "while line is read from /etc/mdev.conf" */
- end_parse: /* nothing */ ;
+ free(line); /* in case we used "break" to get here */
+ fclose(fp);
}
+ end_parse:
- if (!delete) {
- if (sscanf(temp, "%d:%d", &major, &minor) != 2) {
- if (ENABLE_FEATURE_MDEV_EXEC)
- goto skip_creation;
- else
- return;
- }
+ if (!delete && sscanf(dev_maj_min, "%u:%u", &major, &minor) == 2) {
if (ENABLE_FEATURE_MDEV_RENAME)
unlink(device_name);
if (ENABLE_FEATURE_MDEV_RENAME && alias) {
char *dest;
- temp = strrchr(alias, '/');
- if (temp) {
- if (temp[1] != '\0')
- /* given a file name, so rename it */
- *temp = '\0';
+ /* ">bar/": rename to bar/device_name */
+ /* ">bar[/]baz": rename to bar[/]baz */
+ dest = strrchr(alias, '/');
+ if (dest) { /* ">bar/[baz]" ? */
+ *dest = '\0'; /* mkdir bar */
bb_make_directory(alias, 0755, FILEUTILS_RECUR);
- dest = concat_path_file(alias, device_name);
- } else
- dest = alias;
+ *dest = '/';
+ if (dest[1] == '\0') { /* ">bar/" => ">bar/device_name" */
+ dest = alias;
+ alias = concat_path_file(alias, device_name);
+ free(dest);
+ }
+ }
- rename(device_name, dest); // TODO: xrename?
- symlink(dest, device_name);
+ /* recreate device_name as a symlink to moved device node */
+ if (rename(device_name, alias) == 0) {
+ symlink(alias, device_name);
+ }
- if (alias != dest)
- free(alias);
- free(dest);
+ free(alias);
}
}
- skip_creation: /* nothing */ ;
}
+
if (ENABLE_FEATURE_MDEV_EXEC && command) {
- /* setenv will leak memory, so use putenv */
+ /* setenv will leak memory, use putenv/unsetenv/free */
char *s = xasprintf("MDEV=%s", device_name);
putenv(s);
if (system(command) == -1)
- bb_perror_msg_and_die("cannot run %s", command);
+ bb_perror_msg_and_die("can't run '%s'", command);
s[4] = '\0';
unsetenv(s);
free(s);
free(command);
}
+
if (delete)
- remove_file(device_name, FILEUTILS_FORCE);
+ unlink(device_name);
}
/* File callback for /sys/ traversal */
void *userData,
int depth ATTRIBUTE_UNUSED)
{
- size_t len = strlen(fileName) - 4;
+ size_t len = strlen(fileName) - 4; /* can't underflow */
char *scratch = userData;
- if (strcmp(fileName + len, "/dev"))
+ /* len check is for paranoid reasons */
+ if (strcmp(fileName + len, "/dev") || len >= PATH_MAX)
return FALSE;
strcpy(scratch, fileName);
- scratch[len] = 0;
+ scratch[len] = '\0';
make_device(scratch, 0);
return TRUE;
int cnt;
int firmware_fd, loading_fd, data_fd;
- /* check for $FIRMWARE from kernel */
- /* XXX: dont bother: open(NULL) works same as open("no-such-file")
- * if (!firmware)
- * return;
- */
-
/* check for /lib/firmware/$FIRMWARE */
xchdir("/lib/firmware");
firmware_fd = xopen(firmware, O_RDONLY);
xchdir(sysfs_path);
for (cnt = 0; cnt < 30; ++cnt) {
loading_fd = open("loading", O_WRONLY);
- if (loading_fd == -1)
- sleep(1);
- else
- break;
+ if (loading_fd != -1)
+ goto loading;
+ sleep(1);
}
- if (loading_fd == -1)
- goto out;
+ goto out;
+ loading:
/* tell kernel we're loading by `echo 1 > /sys/$DEVPATH/loading` */
- if (write(loading_fd, "1", 1) != 1)
+ if (full_write(loading_fd, "1", 1) != 1)
goto out;
/* load firmware by `cat /lib/firmware/$FIRMWARE > /sys/$DEVPATH/data */
/* tell kernel result by `echo [0|-1] > /sys/$DEVPATH/loading` */
if (cnt > 0)
- write(loading_fd, "0", 1);
+ full_write(loading_fd, "0", 1);
else
- write(loading_fd, "-1", 2);
+ full_write(loading_fd, "-1", 2);
out:
if (ENABLE_FEATURE_CLEAN_UP) {
{
char *action;
char *env_path;
- RESERVE_CONFIG_BUFFER(temp,PATH_MAX);
+ RESERVE_CONFIG_BUFFER(temp, PATH_MAX + SCRATCH_SIZE);
xchdir("/dev");
- if (argc == 2 && !strcmp(argv[1],"-s")) {
-
+ if (argc == 2 && !strcmp(argv[1], "-s")) {
/* Scan:
* mdev -s
*/
-
struct stat st;
xstat("/", &st);
fileAction, dirAction, temp, 0);
} else {
-
/* Hotplug:
* env ACTION=... DEVPATH=... mdev
* ACTION can be "add" or "remove"
* DEVPATH is like "/block/sda" or "/class/input/mice"
*/
-
action = getenv("ACTION");
env_path = getenv("DEVPATH");
if (!action || !env_path)
bb_show_usage();
- sprintf(temp, "/sys%s", env_path);
+ snprintf(temp, PATH_MAX, "/sys%s", env_path);
if (!strcmp(action, "remove"))
make_device(temp, 1);
else if (!strcmp(action, "add")) {
make_device(temp, 0);
- if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE)
- load_firmware(getenv("FIRMWARE"), temp);
+ if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE) {
+ char *fw = getenv("FIRMWARE");
+ if (fw)
+ load_firmware(fw, temp);
+ }
}
}
projects / oweals / busybox.git / commitdiff