#include "afm-launch.h"
#include "secmgr-wrap.h"
+#define DEFAULT_TYPE "text/html"
+
+const char separators[] = " \t\n";
+
+struct execdesc {
+ char *type;
+ char **execs[2];
+};
+
+struct launchers {
+ int count;
+ struct execdesc *descs;
+};
+
+static struct launchers launchers = { 0, NULL };
+
+struct launchparam {
+ int port;
+ const char *secret;
+ const char *datadir;
+ const char **master;
+ const char **slave;
+};
+
+static gid_t groupid = 0;
+
+static int read_type(const char *buffer, const char *filepath, int line)
+{
+ size_t length;
+ int count;
+ struct execdesc *descs;
+ char *type;
+
+ /* check the type */
+ length = strcspn(buffer, separators);
+ assert(length);
+ if (buffer[length + strspn(buffer + length, separators)] != 0) {
+ ERROR("%s:%d: extra characters found after type", filepath, line);
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* allocates data */
+ type = strndup(buffer, length);
+ count = launchers.count + 1;
+ descs = realloc(launchers.descs, count * sizeof(struct execdesc));
+ if (descs == NULL || type == NULL) {
+ free(type);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ /* fill data */
+ launchers.descs = descs;
+ descs += count - 1;
+ descs->type = type;
+ descs->execs[0] = NULL;
+ descs->execs[1] = NULL;
+ launchers.count = count;
+ return 0;
+}
+
+static int read_args(const char *buffer, int bottom, int offset, const char *filepath, int line)
+{
+ char **vector, *args;
+ size_t index, len, length;
+ int count;
+
+ /* count */
+ count = 0;
+ length = index = 0;
+ while(buffer[index]) {
+ count++;
+ /* skips the spaces */
+ len = strcspn(buffer + index, separators);
+ length += len;
+ /* skips the spaces */
+ index += len;
+ index += strspn(buffer + index, separators);
+ }
+ /* allocates */
+ while (bottom < launchers.count) {
+ vector = malloc(length + count + (count + 1) * sizeof(char*));
+ if (vector == NULL) {
+ ERROR("%s:%d: out of memory", filepath, line);
+ return -1;
+ }
+ args = (char*)(vector + count + 1);
+ count = 0;
+ index = 0;
+ while(buffer[index]) {
+ /* skips the spaces */
+ len = strcspn(buffer + index, separators);
+ vector[count++] = args;
+ memcpy(args, buffer + index, len);
+ args += len;
+ index += len;
+ *args++ = 0;
+ /* skips the spaces */
+ len = strspn(buffer + index, separators);
+ index += len;
+ }
+ vector[count] = NULL;
+ launchers.descs[bottom++].execs[offset] = vector;
+ }
+ return 0;
+}
+
+static int read_launchers(FILE *file, const char *filepath)
+{
+ char buffer[4096];
+ int index, line, rc, bottom, offset, typed;
+
+ /* reads the file */
+ line = 0;
+ offset = 0;
+ typed = 0;
+ bottom = launchers.count;
+ while (fgets(buffer, sizeof buffer, file) != NULL) {
+ line++;
+
+ /* find start of line */
+ index = strspn(buffer, separators);
+
+ /* skip empty lines and comments */
+ if (buffer[index] == 0 || buffer[index] == '#')
+ continue;
+
+ if (index == 0) {
+ if (!typed)
+ bottom = launchers.count;
+ rc = read_type(buffer, filepath, line);
+ if (rc)
+ return rc;
+ if (!typed) {
+ typed = 1;
+ offset = 0;
+ }
+ } else if (!typed && !offset) {
+ ERROR("%s:%d: untyped launcher found", filepath, line);
+ errno = EINVAL;
+ return -1;
+ } else if (offset >= 2) {
+ ERROR("%s:%d: extra launcher found", filepath, line);
+ errno = EINVAL;
+ return -1;
+ } else {
+ rc = read_args(buffer + index, bottom, offset, filepath, line);
+ if (rc)
+ return rc;
+ offset++;
+ typed = 0;
+ }
+ }
+ if (ferror(file)) {
+ ERROR("%s:%d: error while reading, %m", filepath, line);
+ return -1;
+ }
+ return 0;
+}
+
+static int read_configuration_file(const char *filepath)
+{
+ int rc;
+ FILE *file;
+
+ /* opens the configuration file */
+ file = fopen(filepath, "r");
+ if (file == NULL) {
+ /* error */
+ ERROR("can't read file %s: %m", filepath);
+ rc = -1;
+ } else {
+ /* reads it */
+ rc = read_launchers(file, filepath);
+ fclose(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 *args_for_afb_daemon[] = {
- "/usr/bin/afb-daemon",
- "--alias=/icons:%I",
- "--port=%P",
- "--rootdir=%D",
- "--token=%S",
- NULL
-};
-
-static const char *args_for_qmlviewer[] = {
- "/usr/bin/qt5/qmlscene",
- "-fullscreen",
- "-I",
- "%r",
- "-I",
- "%r/imports",
- "%r/%c",
- NULL
-};
-
-static const char *args_for_web_runtime[] = {
- "/usr/share/qt5/examples/webkitwidgets/browser/browser",
- "http://localhost:%P/%c?token=%S",
- NULL
-};
-
-static const char *args_for_binary[] = {
- "%r/%c",
- NULL
-};
-
-struct execdesc {
- const char *type;
- const char **master_args;
- const char **slave_args;
-};
-
-static struct execdesc known_launchers[] = {
- { "text/html", args_for_afb_daemon, args_for_web_runtime },
- { "application/x-executable", args_for_binary, NULL },
- { "text/vnd.qt.qml", args_for_qmlviewer, NULL }
-};
-
-struct launchparam {
- int port;
- const char *secret;
- const char *datadir;
- const char **master_args;
- const char **slave_args;
-};
-
static char **instantiate_arguments(const char **args, struct afm_launch_desc *desc, struct launchparam *params)
{
const char **iter, *p, *v;
char *data, **result, port[20], width[20], height[20], mini[3], c;
- int n, s, x;
+ int n, s;
/* init */
mini[0] = '%';
mini[2] = 0;
/* loop that either compute the size and build the result */
- n = s = x = 0;
+ data = NULL;
+ result = NULL;
+ n = s = 0;
for (;;) {
iter = args;
n = 0;
while (*iter) {
p = *iter++;
- if (x)
+ if (data)
result[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 'P': if(!data) 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 '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)
+ if (data)
*data++ = 0;
else
s++;
}
- if (x) {
+ if (data) {
result[n] = NULL;
return result;
}
return NULL;
}
data = (char*)(&result[n + 1]);
- x = 1;
}
}
return port;
}
-
-
static int launchexec1(struct afm_launch_desc *desc, pid_t children[2], struct launchparam *params)
{
int rc;
}
/********* in the master child ************/
+
+ /* avoid set-gid effect */
+ setresgid(groupid, groupid, groupid);
+
/* enter the process group */
rc = setpgid(0, 0);
if (rc) {
_exit(1);
}
- args = instantiate_arguments(params->master_args, desc, params);
+ args = instantiate_arguments(params->master, desc, params);
if (args == NULL) {
ERROR("out of memory in master");
}
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) {
/********* 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(params->slave_args, desc, params);
+ args = instantiate_arguments(params->slave, desc, params);
if (args == NULL) {
ERROR("out of memory in slave");
}
/********* still in the master child ************/
close(spipe[1]);
- args = instantiate_arguments(params->master_args, desc, params);
+ args = instantiate_arguments(params->master, desc, params);
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);
}
+int afm_launch_initialize()
+{
+ gid_t r, e, s;
+ getresgid(&r, &e, &s);
+ if (s && s != e)
+ groupid = s;
+ else
+ groupid = -1;
+ return read_configuration_file(FWK_LAUNCH_CONF);
+}
+
int afm_launch(struct afm_launch_desc *desc, pid_t children[2])
{
char datadir[PATH_MAX];
- int ikl, nkl, rc;
+ int ikl, rc;
char secret[9];
struct launchparam params;
+ const char *type;
+
+ /* should be init */
+ assert(groupid != 0);
+
+ /* init */
+ children[0] = 0;
+ children[1] = 0;
/* what launcher ? */
+ type = desc->type != NULL && *desc->type ? desc->type : DEFAULT_TYPE;
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;
- }
+ while (ikl < launchers.count && strcmp(type, launchers.descs[ikl].type))
+ ikl++;
+ if (ikl == launchers.count) {
+ ERROR("type %s not found!", type);
+ errno = ENOENT;
+ return -1;
}
/* prepare paths */
params.port = mkport();
params.secret = secret;
params.datadir = datadir;
- params.master_args = known_launchers[ikl].master_args;
- params.slave_args = known_launchers[ikl].slave_args;
+ params.master = (const char **)launchers.descs[ikl].execs[0];
+ params.slave = (const char **)launchers.descs[ikl].execs[1];
- return params.slave_args ? launchexec2(desc, children, ¶ms) : launchexec1(desc, children, ¶ms);
+ return params.slave ? launchexec2(desc, children, ¶ms) : launchexec1(desc, children, ¶ms);
}
Code Review / src / app-framework-main.git / blobdiff