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w: do not truncate command when width is not known

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This change also adds a definition, which is in control of all command
buffer size related operations.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This commit is contained in:
Sami Kerola 2012-07-15 12:42:56 +02:00
parent 7696bd200e
commit d958f1c0fc
1 changed files with 9 additions and 3 deletions
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12
w.c
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@ -69,6 +69,8 @@ typedef struct utmp utmp_t;
# define FROM_STRING "off"
#endif
#define MAX_CMD_WIDTH 512
/*
* This routine is careful since some programs leave utmp strings
* unprintable. Always outputs at least 16 chars padded with
@ -419,7 +421,7 @@ static void showinfo(utmp_t * u, int formtype, int maxcmd, int from,
}
fputs(" ", stdout);
if (likely(best)) {
char cmdbuf[512];
char cmdbuf[MAX_CMD_WIDTH];
escape_command(cmdbuf, best, sizeof cmdbuf, &maxcmd, ESC_ARGS);
fputs(cmdbuf, stdout);
} else {
@ -554,10 +556,14 @@ int main(int argc, char **argv)
else if ((p = getenv("COLUMNS")))
maxcmd = atoi(p);
else
maxcmd = 80;
maxcmd = MAX_CMD_WIDTH;
if (maxcmd < 71)
xerrx(EXIT_FAILURE, _("%d column window is too narrow"), maxcmd);
if (MAX_CMD_WIDTH < maxcmd) {
xwarnx(_("%d column width exceeds command buffer size, truncating to %d"),
maxcmd, MAX_CMD_WIDTH);
maxcmd = MAX_CMD_WIDTH;
}
maxcmd -= 21 + userlen + (from ? fromlen : 0) + (longform ? 20 : 0);
if (maxcmd < 3)
xwarnx(_("warning: screen width %d suboptimal"), win.ws_col);