fix strncmp bug by using strcmp - scroll - scrollbackbuffer program for st
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       ---
 (DIR) commit 91d126eabe33630163d15f9bb423ca95f95333f4
 (DIR) parent 6e7406cde8b517ecee582856ffbaaaea63e98661
 (HTM) Author: Jan Klemkow <j.klemkow@wemelug.de>
       Date:   Tue, 14 Apr 2020 22:40:50 +0200
       
       fix strncmp bug by using strcmp
       
       if input is just a single ESC character, strncmp
       just compares the first char of the constant string.
       
       Diffstat:
         M scroll.c                            |       6 ++++--
       
       1 file changed, 4 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/scroll.c b/scroll.c
       @@ -506,18 +506,20 @@ main(int argc, char *argv[])
                        }
         out:
                        if (pfd[1].revents & POLLIN) {
       -                        ssize_t n = read(mfd, input, sizeof input);
       +                        ssize_t n = read(mfd, input, sizeof(input)-1);
        
                                if (n == -1 && errno != EINTR)
                                        die("read:");
                                if (n == 0)        /* on exit of child we continue here */
                                        continue; /* let signal handler catch SIGCHLD */
        
       +                        input[n] = '\0';
       +
                                if (write(STDOUT_FILENO, input, n) == -1)
                                        die("write:");
        
                                /* don't save clear screen esc sequences in log */
       -                        if (strncmp("\033[H\033[2J", input, n) == 0)
       +                        if (strcmp("\033[H\033[2J", input) == 0)
                                        continue;
        
                                /* iterate over the input buffer */