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add -n option to finish feature parity with tee

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dtb 2024-01-15 13:55:05 -07:00
parent ec4b07e522
commit f311a55cff
1 changed files with 9 additions and 3 deletions
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12
mm/mm.c
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@ -1,4 +1,5 @@
#include <errno.h> /* errno */ #include <errno.h> /* errno */
#include <signal.h> /* signal(2), SIG_ERR, SIG_IGN, SIGINT */
#include <stdio.h> /* fclose(3), fopen(3), fprintf(3), getc(3), putc(3), #include <stdio.h> /* fclose(3), fopen(3), fprintf(3), getc(3), putc(3),
* setvbuf(3), size_t, _IONBF, NULL */ * setvbuf(3), size_t, _IONBF, NULL */
#include <stdlib.h> /* free(3), realloc(3) */ #include <stdlib.h> /* free(3), realloc(3) */
@ -235,8 +236,8 @@ oserr(char *s, char *r){
static int static int
usage(char *s){ usage(char *s){
fprintf(stderr, "Usage: %s (-ehu) (-i [input])... (-o [output])...\n", fprintf(stderr, "Usage: %s (-aehnu)"
s); " (-i [input])... (-o [output])...\n", s);
return EX_USAGE; return EX_USAGE;
} }
@ -272,7 +273,7 @@ int main(int argc, char *argv[]){
unbuffered = 0; unbuffered = 0;
while((c = getopt(argc, argv, "ehi:o:u")) != -1) while((c = getopt(argc, argv, "ehi:no:u")) != -1)
switch(c){ switch(c){
case 'a': case 'a':
io[1].fmode = amode; io[1].fmode = amode;
@ -300,6 +301,11 @@ int main(int argc, char *argv[]){
} }
terminate(io); terminate(io);
return oserr(argv[0], optarg);; return oserr(argv[0], optarg);;
case 'n':
if(signal(SIGINT, SIG_IGN) != SIG_ERR)
break;
terminate(io);
return oserr(argv[0], "-n");
case 'u': case 'u':
unbuffered = 1; unbuffered = 1;
break; break;