extern char **environ;
#include "verbose.h"
+#include "afm-launch-mode.h"
#include "afm-launch.h"
#include "secmgr-wrap.h"
+#define DEFAULT_TYPE "text/html"
+
+struct type_list {
+ struct type_list *next;
+ char type[1];
+};
+
+struct desc_list {
+ struct desc_list *next;
+ enum afm_launch_mode mode;
+ struct type_list *types;
+ char **execs[2];
+};
+
+struct launchparam {
+ int port;
+ char **uri;
+ const char *secret;
+ const char *datadir;
+ const char **master;
+ const char **slave;
+};
+
+struct confread {
+ const char *filepath;
+ FILE *file;
+ int lineno;
+ int index;
+ int length;
+ char buffer[4096];
+};
+
+struct desc_list *launchers = NULL;
+
+static gid_t groupid = 0;
+
+const char separators[] = " \t\n";
+
+static void dump_launchers()
+{
+ int j, k;
+ struct desc_list *desc;
+ struct type_list *type;
+
+ for (desc = launchers ; desc != NULL ; desc = desc->next) {
+ printf("mode %s\n", name_of_launch_mode(desc->mode));
+ for (type = desc->types ; type != NULL ; type = type->next)
+ printf("%s\n", type->type);
+ for ( j = 0 ; j < 2 ; j++)
+ if (desc->execs[j] != NULL) {
+ for (k = 0 ; desc->execs[j][k] != NULL ; k++)
+ printf(" %s", desc->execs[j][k]);
+ printf("\n");
+ }
+ printf("\n");
+ }
+}
+
+static int next_token(struct confread *cread)
+{
+ int idx = cread->index + cread->length;
+ cread->index = idx + strspn(&cread->buffer[idx], separators);
+ cread->length = strcspn(&cread->buffer[cread->index], separators);
+ return cread->length;
+}
+
+static int read_line(struct confread *cread)
+{
+ while (fgets(cread->buffer, sizeof cread->buffer, cread->file) != NULL) {
+ cread->lineno++;
+ cread->index = strspn(cread->buffer, separators);
+ if (cread->buffer[cread->index] && cread->buffer[cread->index] != '#') {
+ cread->length = strcspn(&cread->buffer[cread->index], separators);
+ assert(cread->length > 0);
+ return cread->length;
+ }
+ }
+ if (ferror(cread->file)) {
+ ERROR("%s:%d: error while reading, %m", cread->filepath, cread->lineno);
+ return -1;
+ }
+ return 0;
+}
+
+static char **read_vector(struct confread *cread)
+{
+ int index0, length0;
+ char **vector, *args;
+ int count, length;
+
+ /* record origin */
+ index0 = cread->index;
+ length0 = cread->length;
+
+ /* count */
+ count = 0;
+ length = 0;
+ while(cread->length) {
+ count++;
+ length += cread->length;
+ next_token(cread);
+ }
+
+ /* allocates */
+ cread->index = index0;
+ cread->length = length0;
+ vector = malloc(length + count + (count + 1) * sizeof(char*));
+ if (vector == NULL)
+ return NULL;
+
+ /* copies */
+ args = (char*)(vector + count + 1);
+ count = 0;
+ while(cread->length) {
+ vector[count++] = args;
+ memcpy(args, &cread->buffer[cread->index], cread->length);
+ args += cread->length;
+ *args++ = 0;
+ next_token(cread);
+ }
+ vector[count] = NULL;
+ cread->index = index0;
+ cread->length = length0;
+ return vector;
+}
+
+static struct type_list *read_type(struct confread *cread)
+{
+ int index, length;
+ struct type_list *result;
+
+ /* record index and length */
+ index = cread->index;
+ length = cread->length;
+
+ /* check no extra characters */
+ if (next_token(cread)) {
+ ERROR("%s:%d: extra characters found after type %.*s",
+ cread->filepath, cread->lineno, length, &cread->buffer[index]);
+ errno = EINVAL;
+ return NULL;
+ }
+
+ /* allocate structure */
+ result = malloc(sizeof(struct type_list) + length);
+ if (result == NULL) {
+ ERROR("%s:%d: out of memory", cread->filepath, cread->lineno);
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ /* fill the structure */
+ memcpy(result->type, &cread->buffer[index], length);
+ result->type[length] = 0;
+ return result;
+}
+
+static enum afm_launch_mode read_mode(struct confread *cread)
+{
+ int index, length;
+ enum afm_launch_mode result;
+
+ assert(cread->index == 0);
+ assert(!strncmp(&cread->buffer[cread->index], "mode", 4));
+
+ /* get the next token: the mode string */
+ if (!next_token(cread)) {
+ ERROR("%s:%d: no mode value set", cread->filepath, cread->lineno);
+ errno = EINVAL;
+ return invalid_launch_mode;
+ }
+
+ /* record index and length */
+ index = cread->index;
+ length = cread->length;
+
+ /* check no extra characters */
+ if (next_token(cread)) {
+ ERROR("%s:%d: extra characters found after mode %.*s",
+ cread->filepath, cread->lineno, length, &cread->buffer[index]);
+ errno = EINVAL;
+ return invalid_launch_mode;
+ }
+
+ /* get the mode */
+ cread->buffer[index + length] = 0;
+ result = launch_mode_of_string(&cread->buffer[index]);
+ if (result == invalid_launch_mode) {
+ ERROR("%s:%d: invalid mode value %s",
+ cread->filepath, cread->lineno, &cread->buffer[index]);
+ errno = EINVAL;
+ }
+ return result;
+}
+
+static void free_type_list(struct type_list *types)
+{
+ while (types != NULL) {
+ struct type_list *next = types->next;
+ free(types);
+ types = next;
+ }
+}
+
+static int read_launchers(struct confread *cread)
+{
+ int rc;
+ struct type_list *types, *lt;
+ struct desc_list *desc;
+ enum afm_launch_mode mode;
+ char **vector;
+
+ /* reads the file */
+ lt = NULL;
+ types = NULL;
+ desc = NULL;
+ mode = invalid_launch_mode;
+ rc = read_line(cread);
+ while (rc > 0) {
+ if (cread->index == 0) {
+ if (cread->length == 4
+ && !memcmp(&cread->buffer[cread->index], "mode", 4)) {
+ /* check if allowed */
+ if (types != NULL) {
+ ERROR("%s:%d: mode found before launch vector",
+ cread->filepath, cread->lineno);
+ errno = EINVAL;
+ free_type_list(types);
+ return -1;
+ }
+
+ /* read the mode */
+ mode = read_mode(cread);
+ if (mode == invalid_launch_mode)
+ return -1;
+ } else {
+ if (mode == invalid_launch_mode) {
+ ERROR("%s:%d: mode not found before type",
+ cread->filepath, cread->lineno);
+ errno = EINVAL;
+ assert(types == NULL);
+ return -1;
+ }
+ /* read a type */
+ lt = read_type(cread);
+ if (lt == NULL) {
+ free_type_list(types);
+ return -1;
+ }
+ lt->next = types;
+ types = lt;
+ }
+ desc = NULL;
+ } else if (types == NULL && desc == NULL) {
+ if (lt == NULL)
+ ERROR("%s:%d: untyped launch vector found",
+ cread->filepath, cread->lineno);
+ else
+ ERROR("%s:%d: extra launch vector found (2 max)",
+ cread->filepath, cread->lineno);
+ errno = EINVAL;
+ return -1;
+ } else {
+ vector = read_vector(cread);
+ if (vector == NULL) {
+ ERROR("%s:%d: out of memory",
+ cread->filepath, cread->lineno);
+ free_type_list(types);
+ errno = ENOMEM;
+ return -1;
+ }
+ if (types) {
+ assert(desc == NULL);
+ desc = malloc(sizeof * desc);
+ if (desc == NULL) {
+ ERROR("%s:%d: out of memory",
+ cread->filepath, cread->lineno);
+ free_type_list(types);
+ errno = ENOMEM;
+ return -1;
+ }
+ desc->next = launchers;
+ desc->mode = mode;
+ desc->types = types;
+ desc->execs[0] = vector;
+ desc->execs[1] = NULL;
+ types = NULL;
+ launchers = desc;
+ } else {
+ desc->execs[1] = vector;
+ desc = NULL;
+ }
+ }
+ rc = read_line(cread);
+ }
+ if (types != NULL) {
+ ERROR("%s:%d: end of file found before launch vector",
+ cread->filepath, cread->lineno);
+ free_type_list(types);
+ errno = EINVAL;
+ return -1;
+ }
+ return rc;
+}
+
+static int read_configuration_file(const char *filepath)
+{
+ int rc;
+ struct confread cread;
+
+ /* opens the configuration file */
+ cread.file = fopen(filepath, "r");
+ if (cread.file == NULL) {
+ /* error */
+ ERROR("can't read file %s: %m", filepath);
+ rc = -1;
+ } else {
+ /* reads it */
+ cread.filepath = filepath;
+ cread.lineno = 0;
+ rc = read_launchers(&cread);
+ fclose(cread.file);
+ }
+ return rc;
+}
+
/*
%I icondir FWK_ICON_DIR
%P port params->port
%p plugins desc->plugins
%W width desc->width
%H height desc->height
+%% %
*/
-static const char *launch_master_args[] = {
- "/usr/bin/echo",
- "--alias=/icons:%I",
- "--port=%P",
- "--rootdir=%D",
- "--token=%S",
- NULL
-};
-
-static const char *launch_html_args[] = {
- "/usr/bin/chromium",
- "--single-process",
- "--user-data-dir=%D",
- "--data-path=%r",
- "file://%r/%c",
-/*
- "http://localhost:%P",
-*/
- NULL
-};
-
-static const char *launch_bin_args[] = {
- "/usr/bin/echo",
- "BINARY",
- NULL
-};
-
-static const char *launch_qml_args[] = {
- "/usr/bin/echo",
- "QML",
- NULL
-};
-
-static struct {
- const char *type;
- const char **launch_args;
-}
-known_launchers[] = {
- { "text/html", launch_html_args },
- { "application/x-executable", launch_bin_args },
- { "application/octet-stream", launch_bin_args },
- { "text/vnd.qt.qml", launch_qml_args }
-};
-
-struct launchparam {
- int port;
- const char *secret;
- const char *datadir;
+union arguments {
+ char *scalar;
+ char **vector;
};
-static char **instantiate_arguments(const char **args, struct afm_launch_desc *desc, struct launchparam *params)
+static union arguments instantiate_arguments(
+ const char **args,
+ struct afm_launch_desc *desc,
+ struct launchparam *params,
+ int wants_vector
+)
{
const char **iter, *p, *v;
- char *data, **result, port[20], width[20], height[20], mini[3], c;
- int n, s, x;
+ char *data, port[20], width[20], height[20], mini[3], c, sep;
+ int n, s;
+ union arguments result;
/* init */
+ sep = wants_vector ? 0 : ' ';
mini[0] = '%';
mini[2] = 0;
/* loop that either compute the size and build the result */
- n = s = x = 0;
+ data = NULL;
+ n = s = 0;
for (;;) {
iter = args;
n = 0;
while (*iter) {
p = *iter++;
- if (x)
- result[n] = data;
+ if (data && !sep)
+ result.vector[n] = data;
n++;
while((c = *p++) != 0) {
if (c != '%') {
- if (x)
+ if (data)
*data++ = c;
else
s++;
c = *p++;
switch (c) {
case 'I': v = FWK_ICON_DIR; break;
- case 'P': if(!x) sprintf(port, "%d", params->port); v = port; break;
case 'S': v = params->secret; break;
case 'D': v = params->datadir; break;
case 'r': v = desc->path; break;
case 'm': v = desc->type; break;
case 'n': v = desc->name; break;
case 'p': v = "" /*desc->plugins*/; break;
- case 'W': if(!x) sprintf(width, "%d", desc->width); v = width; break;
- case 'H': if(!x) sprintf(height, "%d", desc->height); v = height; break;
- case '%': c = 0;
- default: mini[1] = c; v = mini; break;
+ case 'P':
+ if(!data)
+ sprintf(port, "%d", params->port);
+ v = port;
+ break;
+ case 'W':
+ if(!data)
+ sprintf(width, "%d", desc->width);
+ v = width;
+ break;
+ case 'H':
+ if(!data)
+ sprintf(height, "%d", desc->height);
+ v = height;
+ break;
+ case '%':
+ c = 0;
+ default:
+ mini[1] = c;
+ v = mini;
+ break;
}
- if (x)
+ if (data)
data = stpcpy(data, v);
else
s += strlen(v);
}
}
- if (x)
- *data++ = 0;
+ if (data)
+ *data++ = sep;
else
s++;
}
- if (x) {
- result[n] = NULL;
- return result;
- }
- /* allocation */
- result = malloc((n+1)*sizeof(char*) + s);
- if (result == NULL) {
- errno = ENOMEM;
- return NULL;
+ if (sep) {
+ assert(!wants_vector);
+ if (data) {
+ *--data = 0;
+ return result;
+ }
+ /* allocation */
+ result.scalar = malloc(s);
+ if (result.scalar == NULL) {
+ errno = ENOMEM;
+ return result;
+ }
+ data = result.scalar;
+ } else {
+ assert(wants_vector);
+ if (data) {
+ result.vector[n] = NULL;
+ return result;
+ }
+ /* allocation */
+ result.vector = malloc((n+1)*sizeof(char*) + s);
+ if (result.vector == NULL) {
+ errno = ENOMEM;
+ return result;
+ }
+ data = (char*)(&result.vector[n + 1]);
}
- data = (char*)(&result[n + 1]);
- x = 1;
}
}
return port;
}
-int afm_launch(struct afm_launch_desc *desc, pid_t children[2])
+static int launch_local_1(
+ struct afm_launch_desc *desc,
+ pid_t children[2],
+ struct launchparam *params
+)
{
- char datadir[PATH_MAX];
- int ikl, nkl, rc;
- char secret[9];
- int port;
- char message[10];
- int mpipe[2];
- int spipe[2];
- struct launchparam params;
+ int rc;
char **args;
- /* what launcher ? */
- ikl = 0;
- if (desc->type != NULL && *desc->type) {
- nkl = sizeof known_launchers / sizeof * known_launchers;
- while (ikl < nkl && strcmp(desc->type, known_launchers[ikl].type))
- ikl++;
- if (ikl == nkl) {
- ERROR("type %s not found!", desc->type);
- errno = ENOENT;
- return -1;
- }
+ /* fork the master child */
+ children[0] = fork();
+ if (children[0] < 0) {
+ ERROR("master fork failed: %m");
+ return -1;
+ }
+ if (children[0]) {
+ /********* in the parent process ************/
+ return 0;
}
- /* prepare paths */
- rc = snprintf(datadir, sizeof datadir, "%s/%s", desc->home, desc->tag);
- if (rc < 0 || rc >= sizeof datadir) {
- ERROR("overflow for datadir");
- errno = EINVAL;
- return -1;
+ /********* in the master child ************/
+
+ /* avoid set-gid effect */
+ setresgid(groupid, groupid, groupid);
+
+ /* enter the process group */
+ rc = setpgid(0, 0);
+ if (rc) {
+ ERROR("setpgid failed");
+ _exit(1);
}
- /* make the secret and port */
- mksecret(secret);
- port = mkport();
+ /* enter security mode */
+ rc = secmgr_prepare_exec(desc->tag);
+ if (rc < 0) {
+ ERROR("call to secmgr_prepare_exec failed: %m");
+ _exit(1);
+ }
- params.port = port;
- params.secret = secret;
- params.datadir = datadir;
+ /* enter the datadirectory */
+ rc = mkdir(params->datadir, 0755);
+ if (rc && errno != EEXIST) {
+ ERROR("creation of datadir %s failed: %m", params->datadir);
+ _exit(1);
+ }
+ rc = chdir(params->datadir);
+ if (rc) {
+ ERROR("can't enter the datadir %s: %m", params->datadir);
+ _exit(1);
+ }
+
+ args = instantiate_arguments(params->master, desc, params, 1).vector;
+ if (args == NULL) {
+ ERROR("out of memory in master");
+ }
+ else {
+ rc = execve(args[0], args, environ);
+ ERROR("failed to exec master %s: %m", args[0]);
+ }
+ _exit(1);
+}
+
+static int launch_local_2(
+ struct afm_launch_desc *desc,
+ pid_t children[2],
+ struct launchparam *params
+)
+{
+ int rc;
+ char message[10];
+ int mpipe[2];
+ int spipe[2];
+ char **args;
/* prepare the pipes */
rc = pipe2(mpipe, O_CLOEXEC);
close(spipe[0]);
/* wait the ready signal (that transmit the slave pid) */
rc = read(mpipe[0], &children[1], sizeof children[1]);
- if (rc < 0) {
+ close(mpipe[0]);
+ if (rc <= 0) {
ERROR("reading master pipe failed: %m");
- close(mpipe[0]);
close(spipe[1]);
return -1;
}
- close(mpipe[0]);
assert(rc == sizeof children[1]);
/* start the child */
rc = write(spipe[1], "start", 5);
close(mpipe[0]);
close(spipe[1]);
+ /* avoid set-gid effect */
+ setresgid(groupid, groupid, groupid);
+
/* enter the process group */
rc = setpgid(0, 0);
if (rc) {
}
/* enter the datadirectory */
- rc = mkdir(datadir, 0755);
+ rc = mkdir(params->datadir, 0755);
if (rc && errno != EEXIST) {
- ERROR("creation of datadir %s failed: %m", datadir);
+ ERROR("creation of datadir %s failed: %m", params->datadir);
_exit(1);
}
- rc = chdir(datadir);
+ rc = chdir(params->datadir);
if (rc) {
- ERROR("can't enter the datadir %s: %m", datadir);
+ ERROR("can't enter the datadir %s: %m", params->datadir);
_exit(1);
}
/********* in the slave child ************/
close(mpipe[0]);
rc = read(spipe[0], message, sizeof message);
- if (rc < 0) {
+ if (rc <= 0) {
ERROR("reading slave pipe failed: %m");
_exit(1);
}
- args = instantiate_arguments(known_launchers[ikl].launch_args, desc, ¶ms);
+ args = instantiate_arguments(params->slave, desc, params, 1).vector;
if (args == NULL) {
ERROR("out of memory in slave");
}
/********* still in the master child ************/
close(spipe[1]);
- args = instantiate_arguments(launch_master_args, desc, ¶ms);
+ args = instantiate_arguments(params->master, desc, params, 1).vector;
if (args == NULL) {
ERROR("out of memory in master");
}
else {
rc = write(mpipe[1], &children[1], sizeof children[1]);
- if (rc < 0) {
+ if (rc <= 0) {
ERROR("can't write master pipe: %m");
}
else {
_exit(1);
}
+static int launch_local(
+ struct afm_launch_desc *desc,
+ pid_t children[2],
+ struct launchparam *params
+)
+{
+ if (params->slave == NULL)
+ return launch_local_1(desc, children, params);
+ return launch_local_2(desc, children, params);
+}
+
+static int launch_remote(
+ struct afm_launch_desc *desc,
+ pid_t children[2],
+ struct launchparam *params
+)
+{
+ int rc;
+ char *uri;
+
+ /* instanciate the uri */
+ if (params->slave == NULL)
+ uri = strdup("");
+ else
+ uri = instantiate_arguments(params->slave, desc, params, 0).scalar;
+ if (uri == NULL) {
+ ERROR("out of memory for remote uri");
+ errno = ENOMEM;
+ return -1;
+ }
+
+ /* launch the command */
+ rc = launch_local_1(desc, children, params);
+ if (rc)
+ free(uri);
+ else
+ *params->uri = uri;
+ return rc;
+}
+
+int afm_launch_initialize()
+{
+ int rc;
+ gid_t r, e, s;
+
+ getresgid(&r, &e, &s);
+ if (s && s != e)
+ groupid = s;
+ else
+ groupid = -1;
+
+ rc = read_configuration_file(FWK_LAUNCH_CONF);
+ dump_launchers();
+ return rc;
+}
+
+static struct desc_list *search_launcher(const char *type, enum afm_launch_mode mode)
+{
+ struct desc_list *dl;
+ struct type_list *tl;
+
+ for (dl = launchers ; dl ; dl = dl->next)
+ if (dl->mode == mode)
+ for (tl = dl->types ; tl != NULL ; tl = tl->next)
+ if (!strcmp(tl->type, type))
+ return dl;
+ return NULL;
+}
+
+int afm_launch(struct afm_launch_desc *desc, pid_t children[2], char **uri)
+{
+ int rc;
+ char datadir[PATH_MAX];
+ char secret[9];
+ struct launchparam params;
+ const char *type;
+ struct desc_list *dl;
+
+ /* should be init */
+ assert(groupid != 0);
+ assert(launch_mode_is_valid(desc->mode));
+ assert(desc->mode == mode_local || uri != NULL);
+ assert(uri == NULL || *uri == NULL);
+
+ /* init */
+ children[0] = 0;
+ children[1] = 0;
+
+ /* what launcher ? */
+ type = desc->type != NULL && *desc->type ? desc->type : DEFAULT_TYPE;
+ dl = search_launcher(type, desc->mode);
+ if (dl == NULL) {
+ ERROR("type %s not found for mode %s!", type, name_of_launch_mode(desc->mode));
+ errno = ENOENT;
+ return -1;
+ }
+
+ /* prepare paths */
+ rc = snprintf(datadir, sizeof datadir, "%s/%s", desc->home, desc->tag);
+ if (rc < 0 || rc >= sizeof datadir) {
+ ERROR("overflow for datadir");
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* make the secret and port */
+ mksecret(secret);
+ params.uri = uri;
+ params.port = mkport();
+ params.secret = secret;
+ params.datadir = datadir;
+ params.master = (const char **)dl->execs[0];
+ params.slave = (const char **)dl->execs[1];
+
+ switch (desc->mode) {
+ case mode_local:
+ return launch_local(desc, children, ¶ms);
+ case mode_remote:
+ return launch_remote(desc, children, ¶ms);
+ default:
+ assert(0);
+ return -1;
+ }
+}
+
Code Review / src / app-framework-main.git / blobdiff