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Add support for scroll(1)

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Scroll is a program that stores all the lines of its child and be used in st as
a way of implementing scrollback.

This solution is much better than implementing the scrollback in st itself
because having a different program allows to use it in any other program
without doing modifications to those programs.
This commit is contained in:
bakkeby 2020-04-20 10:24:34 +02:00
parent 2465559051
commit 2090981be3
4 changed files with 16 additions and 9 deletions
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16
st.c
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@ -726,7 +726,7 @@ die(const char *errstr, ...)
void
execsh(char *cmd, char **args)
{
char *sh, *prog;
char *sh, *prog, *arg;
const struct passwd *pw;
errno = 0;
@ -740,12 +740,16 @@ execsh(char *cmd, char **args)
if ((sh = getenv("SHELL")) == NULL)
sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;
if (args)
if (args) {
prog = args[0];
else if (utmp)
prog = utmp;
else
arg = NULL;
} else if (scroll || utmp) {
prog = scroll ? scroll : utmp;
arg = scroll ? utmp : NULL;
} else {
prog = sh;
arg = NULL;
}
DEFAULT(args, ((char *[]) {prog, NULL}));
unsetenv("COLUMNS");
@ -2768,4 +2772,4 @@ redraw(void)
draw();
}
#include "patch/st_include.c"
#include "patch/st_include.c"