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Diffstat (limited to 'modutils/modprobe.c')
-rw-r--r--modutils/modprobe.c270
1 files changed, 134 insertions, 136 deletions
diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index a67ddea..f7d193a 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -15,6 +15,8 @@
#include <sys/utsname.h>
#include <fnmatch.h>
+#define line_buffer bb_common_bufsiz1
+
struct mod_opt_t { /* one-way list of options to pass to a module */
char * m_opt_val;
struct mod_opt_t * m_next;
@@ -48,7 +50,7 @@ struct mod_list_t { /* two-way list of modules to process */
static struct dep_t *depend;
-#define main_options "acdklnqrst:vVC:"
+#define MAIN_OPT_STR "acdklnqrst:vVC:"
#define INSERT_ALL 1 /* a */
#define DUMP_CONF_EXIT 2 /* c */
#define D_OPT_IGNORED 4 /* d */
@@ -63,14 +65,12 @@ static struct dep_t *depend;
#define VERSION_ONLY 2048 /* V */
#define CONFIG_FILE 4096 /* C */
-#define autoclean (main_opts & AUTOCLEAN_FLG)
-#define show_only (main_opts & SHOW_ONLY)
-#define quiet (main_opts & QUIET)
-#define remove_opt (main_opts & REMOVE_OPT)
-#define do_syslog (main_opts & DO_SYSLOG)
-#define verbose (main_opts & VERBOSE)
-
-static int main_opts;
+#define autoclean (option_mask32 & AUTOCLEAN_FLG)
+#define show_only (option_mask32 & SHOW_ONLY)
+#define quiet (option_mask32 & QUIET)
+#define remove_opt (option_mask32 & REMOVE_OPT)
+#define do_syslog (option_mask32 & DO_SYSLOG)
+#define verbose (option_mask32 & VERBOSE)
static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
{
@@ -78,12 +78,15 @@ static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
buffer = skip_whitespace(buffer);
tag = value = buffer;
- while (!isspace(*value))
- if (!*value) return 0;
- else value++;
- *value++ = 0;
+ while (!isspace(*value)) {
+ if (!*value)
+ return 0;
+ value++;
+ }
+ *value++ = '\0';
value = skip_whitespace(value);
- if (!*value) return 0;
+ if (!*value)
+ return 0;
*ptag = tag;
*pvalue = value;
@@ -102,14 +105,14 @@ static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
while (ol->m_next) {
ol = ol->m_next;
}
- ol->m_next = xmalloc(sizeof(struct mod_opt_t));
+ ol->m_next = xzalloc(sizeof(struct mod_opt_t));
ol = ol->m_next;
} else {
- ol = opt_list = xmalloc(sizeof(struct mod_opt_t));
+ ol = opt_list = xzalloc(sizeof(struct mod_opt_t));
}
ol->m_opt_val = xstrdup(opt);
- ol->m_next = NULL;
+ /*ol->m_next = NULL; - done by xzalloc*/
return opt_list;
}
@@ -190,7 +193,8 @@ static char *parse_command_string(char *src, char **dst)
case '0':
/* We escaped a special character. For now, keep
* both the back-slash and the following char. */
- tmp_str++; src++;
+ tmp_str++;
+ src++;
break;
default:
/* We escaped a space or a single or double quote,
@@ -242,12 +246,12 @@ static void include_conf(struct dep_t **first, struct dep_t **current, char *buf
p = strchr(buffer, '#');
if (p)
- *p = 0;
+ *p = '\0';
l = strlen(buffer);
while (l && isspace(buffer[l-1])) {
- buffer[l-1] = 0;
+ buffer[l-1] = '\0';
l--;
}
@@ -256,66 +260,68 @@ static void include_conf(struct dep_t **first, struct dep_t **current, char *buf
continue;
}
- if (!continuation_line) {
- if ((strncmp(buffer, "alias", 5) == 0) && isspace(buffer[5])) {
- char *alias, *mod;
+ if (continuation_line)
+ continue;
- if (parse_tag_value(buffer + 6, &alias, &mod)) {
- /* handle alias as a module dependent on the aliased module */
- if (!*current) {
- (*first) = (*current) = xzalloc(sizeof(struct dep_t));
- } else {
- (*current)->m_next = xzalloc(sizeof(struct dep_t));
- (*current) = (*current)->m_next;
- }
- (*current)->m_name = xstrdup(alias);
- (*current)->m_isalias = 1;
+ if ((strncmp(buffer, "alias", 5) == 0) && isspace(buffer[5])) {
+ char *alias, *mod;
- if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
- (*current)->m_depcnt = 0;
- (*current)->m_deparr = 0;
- } else {
- (*current)->m_depcnt = 1;
- (*current)->m_deparr = xmalloc(1 * sizeof(char *));
- (*current)->m_deparr[0] = xstrdup(mod);
- }
- (*current)->m_next = 0;
+ if (parse_tag_value(buffer + 6, &alias, &mod)) {
+ /* handle alias as a module dependent on the aliased module */
+ if (!*current) {
+ (*first) = (*current) = xzalloc(sizeof(struct dep_t));
+ } else {
+ (*current)->m_next = xzalloc(sizeof(struct dep_t));
+ (*current) = (*current)->m_next;
}
- } else if ((strncmp(buffer, "options", 7) == 0) && isspace(buffer[7])) {
- char *mod, *opt;
-
- /* split the line in the module/alias name, and options */
- if (parse_tag_value(buffer + 8, &mod, &opt)) {
- struct dep_t *dt;
+ (*current)->m_name = xstrdup(alias);
+ (*current)->m_isalias = 1;
- /* find the corresponding module */
- for (dt = *first; dt; dt = dt->m_next) {
- if (strcmp(dt->m_name, mod) == 0)
- break;
- }
- if (dt) {
- if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
- char* new_opt = NULL;
- while ((opt = parse_command_string(opt, &new_opt))) {
- dt->m_options = append_option(dt->m_options, new_opt);
- }
- } else {
- dt->m_options = append_option(dt->m_options, opt);
- }
- }
+ if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
+ /*(*current)->m_depcnt = 0; - done by xzalloc */
+ /*(*current)->m_deparr = 0;*/
+ } else {
+ (*current)->m_depcnt = 1;
+ (*current)->m_deparr = xmalloc(sizeof(char *));
+ (*current)->m_deparr[0] = xstrdup(mod);
}
- } else if ((strncmp(buffer, "include", 7) == 0) && isspace(buffer[7])) {
- int fdi; char *filename;
+ /*(*current)->m_next = NULL; - done by xzalloc */
+ }
+ } else if ((strncmp(buffer, "options", 7) == 0) && isspace(buffer[7])) {
+ char *mod, *opt;
- filename = skip_whitespace(buffer + 8);
+ /* split the line in the module/alias name, and options */
+ if (parse_tag_value(buffer + 8, &mod, &opt)) {
+ struct dep_t *dt;
- if ((fdi = open(filename, O_RDONLY)) >= 0) {
- include_conf(first, current, buffer, buflen, fdi);
- close(fdi);
+ /* find the corresponding module */
+ for (dt = *first; dt; dt = dt->m_next) {
+ if (strcmp(dt->m_name, mod) == 0)
+ break;
}
+ if (dt) {
+ if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
+ char* new_opt = NULL;
+ while ((opt = parse_command_string(opt, &new_opt))) {
+ dt->m_options = append_option(dt->m_options, new_opt);
+ }
+ } else {
+ dt->m_options = append_option(dt->m_options, opt);
+ }
+ }
+ }
+ } else if ((strncmp(buffer, "include", 7) == 0) && isspace(buffer[7])) {
+ int fdi;
+ char *filename;
+
+ filename = skip_whitespace(buffer + 8);
+ fdi = open(filename, O_RDONLY);
+ if (fdi >= 0) {
+ include_conf(first, current, buffer, buflen, fdi);
+ close(fdi);
}
}
- }
+ } /* while (reads(...)) */
}
/*
@@ -327,9 +333,8 @@ static struct dep_t *build_dep(void)
{
int fd;
struct utsname un;
- struct dep_t *first = 0;
- struct dep_t *current = 0;
- char buffer[2048];
+ struct dep_t *first = NULL;
+ struct dep_t *current = NULL;
char *filename;
int continuation_line = 0;
int k_version;
@@ -350,16 +355,16 @@ static struct dep_t *build_dep(void)
/* Ok, that didn't work. Fall back to looking in /lib/modules */
fd = open("/lib/modules/modules.dep", O_RDONLY);
if (fd < 0) {
- return 0;
+ bb_error_msg_and_die("cannot parse modules.dep");
}
}
- while (reads(fd, buffer, sizeof(buffer))) {
- int l = strlen(buffer);
+ while (reads(fd, line_buffer, sizeof(line_buffer))) {
+ int l = strlen(line_buffer);
char *p = 0;
- while (l > 0 && isspace(buffer[l-1])) {
- buffer[l-1] = 0;
+ while (l > 0 && isspace(line_buffer[l-1])) {
+ line_buffer[l-1] = '\0';
l--;
}
@@ -371,7 +376,7 @@ static struct dep_t *build_dep(void)
/* Is this a new module dep description? */
if (!continuation_line) {
/* find the dep beginning */
- char *col = strchr(buffer, ':');
+ char *col = strchr(line_buffer, ':');
char *dot = col;
if (col) {
@@ -381,53 +386,52 @@ static struct dep_t *build_dep(void)
char *mod;
/* Find the beginning of the module file name */
- *col = 0;
- mods = bb_basename(buffer);
+ *col = '\0';
+ mods = bb_basename(line_buffer);
/* find the path of the module */
- modpath = strchr(buffer, '/'); /* ... and this is the path */
+ modpath = strchr(line_buffer, '/'); /* ... and this is the path */
if (!modpath)
- modpath = buffer; /* module with no path */
+ modpath = line_buffer; /* module with no path */
/* find the end of the module name in the file name */
if (ENABLE_FEATURE_2_6_MODULES &&
- (k_version > 4) && (*(col-3) == '.') &&
- (*(col-2) == 'k') && (*(col-1) == 'o'))
+ (k_version > 4) && (col[-3] == '.') &&
+ (col[-2] == 'k') && (col[-1] == 'o'))
dot = col - 3;
- else
- if ((*(col-2) == '.') && (*(col-1) == 'o'))
- dot = col - 2;
+ else if ((col[-2] == '.') && (col[-1] == 'o'))
+ dot = col - 2;
mod = xstrndup(mods, dot - mods);
/* enqueue new module */
if (!current) {
- first = current = xmalloc(sizeof(struct dep_t));
+ first = current = xzalloc(sizeof(struct dep_t));
} else {
- current->m_next = xmalloc(sizeof(struct dep_t));
+ current->m_next = xzalloc(sizeof(struct dep_t));
current = current->m_next;
}
- current->m_name = mod;
- current->m_path = xstrdup(modpath);
- current->m_options = NULL;
- current->m_isalias = 0;
- current->m_depcnt = 0;
- current->m_deparr = 0;
- current->m_next = 0;
+ current->m_name = mod;
+ current->m_path = xstrdup(modpath);
+ /*current->m_options = NULL; - xzalloc did it*/
+ /*current->m_isalias = 0;*/
+ /*current->m_depcnt = 0;*/
+ /*current->m_deparr = 0;*/
+ /*current->m_next = 0;*/
p = col + 1;
} else
/* this line is not a dep description */
- p = 0;
+ p = NULL;
} else
/* It's a dep description continuation */
- p = buffer;
+ p = line_buffer;
while (p && *p && isblank(*p))
p++;
/* p points to the first dependable module; if NULL, no dependable module */
if (p && *p) {
- char *end = &buffer[l-1];
+ char *end = &line_buffer[l-1];
const char *deps;
char *dep;
char *next;
@@ -440,7 +444,7 @@ static struct dep_t *build_dep(void)
/* search the end of the dependency */
next = strchr(p, ' ');
if (next) {
- *next = 0;
+ *next = '\0';
next--;
} else
next = end;
@@ -454,12 +458,11 @@ static struct dep_t *build_dep(void)
/* find the end of the module name in the file name */
if (ENABLE_FEATURE_2_6_MODULES
- && (k_version > 4) && (*(next-2) == '.')
- && (*(next-1) == 'k') && (*next == 'o'))
+ && (k_version > 4) && (next[-2] == '.')
+ && (next[-1] == 'k') && (next[0] == 'o'))
ext = 3;
- else
- if ((*(next-1) == '.') && (*next == 'o'))
- ext = 2;
+ else if ((next[-1] == '.') && (next[0] == 'o'))
+ ext = 2;
/* Cope with blank lines */
if ((next-deps-ext+1) <= 0)
@@ -477,11 +480,8 @@ static struct dep_t *build_dep(void)
}
/* is there other dependable module(s) ? */
- if (buffer[l-1] == '\\')
- continuation_line = 1;
- else
- continuation_line = 0;
- }
+ continuation_line = (line_buffer[l-1] == '\\');
+ } /* while (reads(...)) */
close(fd);
/*
@@ -498,7 +498,7 @@ static struct dep_t *build_dep(void)
fd = open("/etc/conf.modules", O_RDONLY);
if (fd >= 0) {
- include_conf(&first, &current, buffer, sizeof(buffer), fd);
+ include_conf(&first, &current, line_buffer, sizeof(line_buffer), fd);
close(fd);
}
@@ -515,7 +515,7 @@ static struct dep_t *build_dep(void)
free(filename);
if (fd >= 0) {
- include_conf(&first, &current, buffer, sizeof(buffer), fd);
+ include_conf(&first, &current, line_buffer, sizeof(line_buffer), fd);
close(fd);
}
@@ -530,7 +530,7 @@ static struct dep_t *build_dep(void)
free(filename);
if (fd >= 0) {
- include_conf(&first, &current, buffer, sizeof(buffer), fd);
+ include_conf(&first, &current, line_buffer, sizeof(line_buffer), fd);
close(fd);
}
}
@@ -542,16 +542,15 @@ static struct dep_t *build_dep(void)
static int already_loaded(const char *name)
{
int fd, ret = 0;
- char buffer[4096];
fd = open("/proc/modules", O_RDONLY);
if (fd < 0)
return -1;
- while (reads(fd, buffer, sizeof(buffer))) {
+ while (reads(fd, line_buffer, sizeof(line_buffer))) {
char *p;
- p = strchr (buffer, ' ');
+ p = strchr(line_buffer, ' ');
if (p) {
const char *n;
@@ -559,8 +558,8 @@ static int already_loaded(const char *name)
// the idiosyncrasy that _ and - are interchangeable because the
// 2.6 kernel does weird things.
- *p = 0;
- for (p = buffer, n = name; ; p++, n++) {
+ *p = '\0';
+ for (p = line_buffer, n = name; ; p++, n++) {
if (*p != *n) {
if ((*p == '_' || *p == '-') && (*n == '_' || *n == '-'))
continue;
@@ -574,8 +573,8 @@ static int already_loaded(const char *name)
}
}
}
-done:
- close (fd);
+ done:
+ close(fd);
return ret;
}
@@ -623,7 +622,7 @@ static int mod_process(const struct mod_list_t *list, int do_insert)
while (opts) {
/* Add one more option */
argc++;
- argv = xrealloc(argv,(argc + 1)* sizeof(char*));
+ argv = xrealloc(argv, (argc + 1) * sizeof(char*));
argv[argc-1] = opts->m_opt_val;
opts = opts->m_next;
}
@@ -698,9 +697,8 @@ static int check_pattern(const char* pat_src, const char* mod_src)
}
return ret;
- } else {
- return fnmatch(pat_src, mod_src, 0);
}
+ return fnmatch(pat_src, mod_src, 0);
}
/*
@@ -712,8 +710,8 @@ static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **t
{
struct mod_list_t *find;
struct dep_t *dt;
- struct mod_opt_t *opt = 0;
- char *path = 0;
+ struct mod_opt_t *opt = NULL;
+ char *path = NULL;
/* Search for the given module name amongst all dependency rules.
* The module name in a dependency rule can be a shell pattern,
@@ -765,8 +763,8 @@ static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **t
// search for duplicates
for (find = *head; find; find = find->m_next) {
- if (!strcmp(mod, find->m_name)) {
- // found ->dequeue it
+ if (strcmp(mod, find->m_name) == 0) {
+ // found -> dequeue it
if (find->m_prev)
find->m_prev->m_next = find->m_next;
@@ -783,7 +781,7 @@ static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **t
}
if (!find) { // did not find a duplicate
- find = xmalloc(sizeof(struct mod_list_t));
+ find = xzalloc(sizeof(struct mod_list_t));
find->m_name = mod;
find->m_path = path;
find->m_options = opt;
@@ -793,7 +791,7 @@ static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **t
if (*tail)
(*tail)->m_next = find;
find->m_prev = *tail;
- find->m_next = 0;
+ /*find->m_next = NULL; - xzalloc did it */
if (!*head)
*head = find;
@@ -868,11 +866,11 @@ int modprobe_main(int argc, char **argv)
char *unused;
opt_complementary = "?V-:q-v:v-q";
- main_opts = getopt32(argv, "acdklnqrst:vVC:",
- &unused, &unused);
- if (main_opts & (DUMP_CONF_EXIT | LIST_ALL))
+ getopt32(argv, MAIN_OPT_STR, &unused, &unused);
+
+ if (option_mask32 & (DUMP_CONF_EXIT | LIST_ALL))
return EXIT_SUCCESS;
- if (main_opts & (RESTRICT_DIR | CONFIG_FILE))
+ if (option_mask32 & (RESTRICT_DIR | CONFIG_FILE))
bb_error_msg_and_die("-t and -C not supported");
depend = build_dep();
@@ -882,8 +880,8 @@ int modprobe_main(int argc, char **argv)
if (remove_opt) {
do {
- if (mod_remove(optind < argc ?
- argv[optind] : NULL)) {
+ /* argv[optind] can be NULL here */
+ if (mod_remove(argv[optind])) {
bb_error_msg("failed to remove module %s",
argv[optind]);
rc = EXIT_FAILURE;
generated by cgit v1.1 at 2024-12-30 20:56:20 +0000