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-rw-r--r--src/utils.c308
1 files changed, 107 insertions, 201 deletions
diff --git a/src/utils.c b/src/utils.c
index b165111..4ea2ce3 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -42,6 +42,8 @@
#include <ctype.h>
#include <sys/types.h>
#include <errno.h>
+#include <fcntl.h>
+#include <sys/wait.h>
#include "calcurse.h"
@@ -230,189 +232,6 @@ print_in_middle (WINDOW *win, int starty, int startx, int width, char *string)
custom_remove_attr (win, ATTR_HIGHEST);
}
-/* Print the string at the desired position. */
-static void
-showstring (WINDOW *win, int x, int y, char *str, int len, int scroff,
- int curpos)
-{
- char c = 0;
-
- /* print string */
- mvwaddnstr (win, y, x, &str[scroff], -1);
- wclrtoeol (win);
-
- /* print scrolling indicator */
- if (scroff > 0 && scroff < len - col)
- c = '*';
- else if (scroff > 0)
- c = '<';
- else if (scroff < len - col)
- c = '>';
- mvwprintw (win, y, col - 1, "%c", c);
-
- /* print cursor */
- wmove (win, y, curpos - scroff);
-
- if (curpos >= len)
- waddch (win, SPACE | A_REVERSE);
- else
- waddch (win, str[curpos] | A_REVERSE);
-}
-
-/* Delete a character at the given position in string. */
-static void
-del_char (int pos, char *str)
-{
- str += pos;
- memmove (str, str + 1, strlen (str) + 1);
-}
-
-/* Add a character at the given position in string. */
-static void
-ins_char (int pos, int ch, char *str)
-{
- str += pos;
- memmove (str + 1, str, strlen (str) + 1);
- *str = ch;
-}
-
-static void
-bell (void)
-{
- printf ("\a");
-}
-
-/*
- * Getstring allows to get user input and to print it on a window,
- * even if noecho() is on. This function is also used to modify an existing
- * text (the variable string can be non-NULL).
- * We need to do the echoing manually because of the multi-threading
- * environment, otherwise the cursor would move from place to place without
- * control.
- */
-enum getstr
-getstring (WINDOW *win, char *str, int l, int x, int y)
-{
- const int pgsize = col / 3;
-
- int len = strlen (str);
- int curpos = len;
- int scroff = 0;
- int ch;
-
- custom_apply_attr (win, ATTR_HIGHEST);
-
- for (;;) {
- while (curpos < scroff)
- scroff -= pgsize;
- while (curpos >= scroff + col - 1)
- scroff += pgsize;
-
- showstring (win, x, y, str, len, scroff, curpos);
- wins_doupdate ();
-
- if ((ch = wgetch (win)) == '\n') break;
- switch (ch)
- {
- case KEY_BACKSPACE: /* delete one character */
- case 330:
- case 127:
- case CTRL ('H'):
- if (curpos > 0)
- {
- del_char ((--curpos), str);
- len--;
- }
- else
- bell ();
- break;
- case CTRL ('D'): /* delete next character */
- if (curpos < len)
- {
- del_char (curpos, str);
- len--;
- }
- else
- bell ();
- break;
- case CTRL ('W'): /* delete a word */
- if (curpos > 0) {
- while (curpos && str[curpos - 1] == ' ')
- {
- del_char ((--curpos), str);
- len--;
- }
- while (curpos && str[curpos - 1] != ' ')
- {
- del_char ((--curpos), str);
- len--;
- }
- }
- else
- bell ();
- break;
- case CTRL ('K'): /* delete to end-of-line */
- str[curpos] = 0;
- len = curpos;
- break;
- case CTRL ('A'): /* go to begginning of string */
- curpos = 0;
- break;
- case CTRL ('E'): /* go to end of string */
- curpos = len;
- break;
- case KEY_LEFT: /* move one char backward */
- case CTRL ('B'):
- if (curpos > 0) curpos--;
- break;
- case KEY_RIGHT: /* move one char forward */
- case CTRL ('F'):
- if (curpos < len) curpos++;
- break;
- case ESCAPE: /* cancel editing */
- return (GETSTRING_ESC);
- break;
- default: /* insert one character */
- if (len < l - 1)
- {
- ins_char ((curpos++), ch, str);
- len++;
- }
- }
- }
-
- custom_remove_attr (win, ATTR_HIGHEST);
-
- return (len == 0 ? GETSTRING_RET : GETSTRING_VALID);
-}
-
-/* Update an already existing string. */
-int
-updatestring (WINDOW *win, char **str, int x, int y)
-{
- int len = strlen (*str);
- char *buf;
- enum getstr ret;
-
- EXIT_IF (len + 1 > BUFSIZ, _("Internal error: line too long"));
-
- buf = mem_malloc (BUFSIZ);
- (void)memcpy (buf, *str, len + 1);
-
- ret = getstring (win, buf, BUFSIZ, x, y);
-
- if (ret == GETSTRING_VALID)
- {
- len = strlen (buf);
- *str = mem_realloc (*str, len + 1, 1);
- EXIT_IF (*str == NULL, _("out of memory"));
- (void)memcpy (*str, buf, len + 1);
- }
-
- mem_free (buf);
- return ret;
-}
-
/* checks if a string is only made of digits */
int
is_all_digit (char *string)
@@ -776,24 +595,6 @@ new_tempfile (const char *prefix, int trailing_len)
return mem_strdup (fullname + prefix_len);
}
-/* Erase a note previously attached to a todo, event or appointment. */
-void
-erase_note (char **note, enum eraseflg flag)
-{
- char fullname[BUFSIZ];
-
- if (*note == NULL)
- return;
- if (flag != ERASE_FORCE_KEEP_NOTE)
- {
- (void)snprintf (fullname, BUFSIZ, "%s%s", path_notes, *note);
- if (unlink (fullname) != 0)
- EXIT (_("could not remove note"));
- }
- mem_free (*note);
- *note = NULL;
-}
-
/*
* Convert a string containing a date into three integers containing the year,
* month and day.
@@ -916,3 +717,108 @@ psleep (unsigned secs)
for (unslept = sleep (secs); unslept; unslept = sleep (unslept))
;
}
+
+/*
+ * Fork and execute an external process.
+ *
+ * If pfdin and/or pfdout point to a valid address, a pipe is created and the
+ * appropriate file descriptors are written to pfdin/pfdout.
+ */
+int
+fork_exec (int *pfdin, int *pfdout, const char *path, char *const *arg)
+{
+ int pin[2], pout[2];
+ int pid;
+
+ if (pfdin && (pipe (pin) == -1))
+ return 0;
+ if (pfdout && (pipe (pout) == -1))
+ return 0;
+
+ if ((pid = fork ()) == 0)
+ {
+ if (pfdout)
+ {
+ if (dup2 (pout[0], STDIN_FILENO) < 0)
+ _exit (127);
+ close (pout[0]);
+ close (pout[1]);
+ }
+
+ if (pfdin)
+ {
+ if (dup2 (pin[1], STDOUT_FILENO) < 0)
+ _exit (127);
+ close (pin[0]);
+ close (pin[1]);
+ }
+
+ execvp (path, arg);
+ _exit (127);
+ }
+ else
+ {
+ if (pfdin)
+ close (pin[1]);
+ if (pfdout)
+ close (pout[0]);
+
+ if (pid > 0)
+ {
+ if (pfdin)
+ {
+ fcntl (pin[0], F_SETFD, FD_CLOEXEC);
+ *pfdin = pin[0];
+ }
+ if (pfdout)
+ {
+ fcntl (pout[1], F_SETFD, FD_CLOEXEC);
+ *pfdout = pout[1];
+ }
+ }
+ else
+ {
+ if (pfdin)
+ close (pin[0]);
+ if (pfdout)
+ close (pout[1]);
+ return 0;
+ }
+ }
+ return pid;
+}
+
+/* Execute an external program in a shell. */
+int
+shell_exec (int *pfdin, int *pfdout, char *cmd)
+{
+ char *arg[] = { "/bin/sh", "-c", cmd, NULL };
+ return fork_exec (pfdin, pfdout, *arg, arg);
+}
+
+/* Wait for a child process to terminate. */
+int
+child_wait (int *pfdin, int *pfdout, int pid)
+{
+ int stat;
+
+ if (pfdin)
+ close (*pfdin);
+ if (pfdout)
+ close (*pfdout);
+
+ waitpid (pid, &stat, 0);
+ return stat;
+}
+
+/* Display "Press any key to continue..." and wait for a key press. */
+void
+press_any_key (void)
+{
+ fflush (stdout);
+ fputs (_("Press any key to continue..."), stdout);
+ fflush (stdout);
+ fgetc (stdin);
+ fflush (stdin);
+ fputs ("\r\n", stdout);
+}
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