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g_spawn_command_line_sync 这个函数怎么理解

时间：2010-07-13

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g_spawn_command_line_sync 这个函数怎么理解
谢谢！！！

作者: heyj6969 发布时间: 2010-07-13

难道楼主都只用百度么？
http://tadeboro.blogspot.com/200 ... ses-using-glib.html

/*
* Compile me with:
* gcc -o spawn spawn.c $(pkg-config --cflags --libs gtk+-2.0)
*/
#include <gtk/gtk.h>
typedef struct _Data Data;
struct _Data {
/*
* Buffers that will display output
*/
GtkTextBuffer *out;
GtkTextBuffer *err;
/*
* Progress bar that will be updated
*/
GtkProgressBar *progress;
/*
* Timeout source id
*/
gint timeout_id;
};
static void
cb_child_watch(GPid pid, gint status, Data * data)
{
/*
* Remove timeout callback
*/
g_source_remove(data->timeout_id);
/*
* Close pid
*/
g_spawn_close_pid(pid);
}
static gboolean
cb_out_watch(GIOChannel * channel, GIOCondition cond, Data * data)
{
gchar *string;
gsize size;
if (cond == G_IO_HUP) {
g_io_channel_unref(channel);
return (FALSE);
}
g_io_channel_read_line(channel, &string, &size, NULL, NULL);
gtk_text_buffer_insert_at_cursor(data->out, string, -1);
g_free(string);
return (TRUE);
}
static gboolean
cb_err_watch(GIOChannel * channel, GIOCondition cond, Data * data)
{
gchar *string;
gsize size;
if (cond == G_IO_HUP) {
g_io_channel_unref(channel);
return (FALSE);
}
g_io_channel_read_line(channel, &string, &size, NULL, NULL);
gtk_text_buffer_insert_at_cursor(data->err, string, -1);
g_free(string);
return (TRUE);
}
static gboolean
cb_timeout(Data * data)
{
/*
* Bounce progress bar
*/
gtk_progress_bar_pulse(data->progress);
return (TRUE);
}
static void
cb_execute(GtkButton * button, Data * data)
{
GPid pid;
gchar *argv[] = { "./helper", NULL };
gint out,
err;
GIOChannel *out_ch,
*err_ch;
gboolean ret;
/*
* Spawn child process
*/
ret = g_spawn_async_with_pipes(NULL, argv, NULL,
G_SPAWN_DO_NOT_REAP_CHILD, NULL,
NULL, &pid, NULL, &out, &err, NULL);
if (!ret) {
g_error("SPAWN FAILED");
return;
}
/*
* Add watch function to catch termination of the process. This
* function * will clean any remnants of process.
*/
g_child_watch_add(pid, (GChildWatchFunc) cb_child_watch, data);
/*
* Create channels that will be used to read data from pipes.
*/
#ifdef G_OS_WIN32
out_ch = g_io_channel_win32_new_fd(out);
err_ch = g_io_channel_win32_new_fd(err);
#else
out_ch = g_io_channel_unix_new(out);
err_ch = g_io_channel_unix_new(err);
#endif
/*
* Add watches to channels
*/
g_io_add_watch(out_ch, G_IO_IN | G_IO_HUP, (GIOFunc) cb_out_watch,
data);
g_io_add_watch(err_ch, G_IO_IN | G_IO_HUP, (GIOFunc) cb_err_watch,
data);
/*
* Install timeout fnction that will move the progress bar
*/
data->timeout_id = g_timeout_add(100, (GSourceFunc) cb_timeout, data);
}
int
main(int argc, char **argv)
{
GtkWidget *window,
*table,
*button,
*progress,
*text;
Data *data;
data = g_slice_new(Data);
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 400, 300);
g_signal_connect(G_OBJECT(window), "destroy",
G_CALLBACK(gtk_main_quit), NULL);
table = gtk_table_new(2, 2, FALSE);
gtk_table_set_row_spacings(GTK_TABLE(table), 6);
gtk_table_set_col_spacings(GTK_TABLE(table), 6);
gtk_container_add(GTK_CONTAINER(window), table);
button = gtk_button_new_from_stock(GTK_STOCK_EXECUTE);
g_signal_connect(G_OBJECT(button), "clicked",
G_CALLBACK(cb_execute), data);
gtk_table_attach(GTK_TABLE(table), button, 0, 1, 0, 1,
GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
progress = gtk_progress_bar_new();
data->progress = GTK_PROGRESS_BAR(progress);
gtk_table_attach(GTK_TABLE(table), progress, 1, 2, 0, 1,
GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
text = gtk_text_view_new();
data->out = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text));
gtk_table_attach(GTK_TABLE(table), text, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
text = gtk_text_view_new();
data->err = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text));
gtk_table_attach(GTK_TABLE(table), text, 1, 2, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show_all(window);
gtk_main();
g_slice_free(Data, data);
return (0);
}

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作者: 没本发布时间: 2010-07-13

g_spawn_command_line_sync 这个函数怎么理解

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