mm(1): formatting
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26b0c93f4d
commit
c7c6ca2c60
GPG Key ID:
06FA419A1698C270
187
src/mm.c
187
src/mm.c
@ -59,9 +59,9 @@ static char *wharsh = "wb";
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* returning the FILE if successful and NULL if not, allocating more memory in
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* the files buffers as needed. */
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static FILE *
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Files_append(struct Files *files, FILE *file, char *name){
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Files_append(struct Files *files, FILE *file, char *name) {
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if(file == NULL || (files->s == files->a
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if (file == NULL || (files->s == files->a
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&& ((files->files = realloc(files->files,
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(files->a += (files->a == 0)
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? ALLOC_INITIAL
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@ -83,7 +83,7 @@ Files_append(struct Files *files, FILE *file, char *name){
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/* Prints a diagnostic message based on errno and returns an exit status
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* appropriate for an OS error. */
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static int
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oserr(char *s, char *r){
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oserr(char *s, char *r) {
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fprintf(stderr, "%s: %s: %s\n", s, r, strerror(errno));
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@ -94,12 +94,16 @@ oserr(char *s, char *r){
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* closing its files and freeing its files and names arrays, returning retval
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* from main. */
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#define terminate \
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for(i = 0; i < 2; ++i){ \
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for(j = 0; j < files[i].s; ++j) \
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if(files[i].files[j] != stdin \
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&& files[i].files[j] != stdout \
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&& files[i].files[j] != stderr) \
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for (i = 0; i < 2; ++i) { \
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for (j = 0; j < files[i].s; ++j) { \
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if ( \
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files[i].files[j] != stdin \
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&& files[i].files[j] != stdout \
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&& files[i].files[j] != stderr \
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) { \
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fclose(files[i].files[j]); \
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} \
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} \
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free(files[i].files); \
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free(files[i].names); \
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} \
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@ -107,14 +111,14 @@ oserr(char *s, char *r){
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/* Prints a usage text, in which s is the program being run (i.e. argv[0]), and
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* returns an exit status appropriate for a usage error. */
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int usage(char *s){
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int usage(char *s) {
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fprintf(stderr, "Usage: %s [-aenu] [-i input]... [-o output]...\n", s);
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return EX_USAGE;
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}
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int main(int argc, char *argv[]){
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int main(int argc, char *argv[]) {
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int c;
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struct Files files[2]; /* {read, write} */
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size_t i;
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@ -127,70 +131,83 @@ int main(int argc, char *argv[]){
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* these initial values will be overwritten, so to, say, use mm(1)
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* equivalently to tee(1p), -o - will need to be specified before
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* additional files to ensure standard output is still written. */
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for(i = 0; i < 2; ++i){
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for (i = 0; i < 2; ++i) {
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files[i].a = 0;
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files[i].s = 0;
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files[i].mode = fmode[i];
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files[i].files = NULL;
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files[i].names = NULL;
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Files_append(&files[i], i == 0 ? stdin : stdout,
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i == 0 ? stdin_name : stdout_name);
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Files_append(
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&files[i],
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i == 0 ? stdin : stdout,
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i == 0 ? stdin_name : stdout_name
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);
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files[i].s = 0;
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}
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k = 0;
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if(argc > 0)
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program_name = argv[0];
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if (argc > 0) { program_name = argv[0]; }
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if(argc > 1)
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while((c = getopt(argc, argv, "aehi:no:u")) != -1)
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switch(c){
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case 'a': /* "rb+" -> "ab" */
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files[1].mode[0] = 'a';
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files[1].mode[2] = '\0';
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break;
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case 'e':
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if(Files_append(&files[1], stderr, stderr_name) != NULL)
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if (argc > 1) {
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while ((c = getopt(argc, argv, "aehi:no:u")) != -1) {
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switch (c){
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case 'a': /* "rb+" -> "ab" */
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files[1].mode[0] = 'a';
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files[1].mode[2] = '\0';
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break;
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retval = oserr(argv[0], "-e");
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terminate;
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case 'i':
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if((strcmp(optarg, "-") == 0 && Files_append(&files[0],
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stdin, stdin_name) != NULL)
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|| Files_open(&files[0], optarg) != NULL)
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break;
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retval = oserr(argv[0], optarg);
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terminate;
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case 'o':
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if((strcmp(optarg, "-") == 0 && Files_append(&files[1],
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stdout, stdout_name) != NULL)
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|| Files_open(&files[1], optarg) != NULL)
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break;
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/* does not exist, so try to create it */
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if(errno == ENOENT){
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files[1].mode = wharsh;
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if(Files_open(&files[1], optarg) != NULL){
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files[1].mode = fmode[1];
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case 'e':
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if (Files_append(&files[1], stderr, stderr_name) != NULL) {
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break;
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}
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}
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retval = oserr(argv[0], optarg);
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terminate;
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case 'n':
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if(signal(SIGINT, SIG_IGN) != SIG_ERR)
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break;
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retval = oserr(argv[0], "-n");
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terminate;
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case 'u':
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k = 1;
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break;
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default:
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retval = usage(argv[0]);
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terminate;
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}
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if(optind != argc){
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retval = oserr(argv[0], "-e");
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terminate;
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case 'i':
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if (
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(strcmp(optarg, "-") == 0
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&& Files_append(&files[0], stdin, stdin_name) != NULL)
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|| Files_open(&files[0], optarg) != NULL
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) { break; }
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retval = oserr(argv[0], optarg);
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terminate;
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case 'o':
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if (
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(strcmp(optarg, "-") == 0
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&& Files_append(&files[1], stdout, stdout_name) != NULL)
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|| Files_open(&files[1], optarg) != NULL
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) { break; }
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/* does not exist, so try to create it */
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if (errno == ENOENT) {
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files[1].mode = wharsh;
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if (Files_open(&files[1], optarg) != NULL) {
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files[1].mode = fmode[1];
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break;
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}
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}
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retval = oserr(argv[0], optarg);
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terminate;
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case 'n':
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if (signal(SIGINT, SIG_IGN) != SIG_ERR) { break; }
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retval = oserr(argv[0], "-n");
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terminate;
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case 'u':
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k = 1;
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break;
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default:
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retval = usage(argv[0]);
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terminate;
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}
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}
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}
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if (optind != argc) {
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retval = usage(argv[0]);
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terminate;
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}
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@ -199,37 +216,53 @@ int main(int argc, char *argv[]){
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files[1].s += files[1].s == 0;
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/* Unbuffer files. */
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if(k){
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for(i = 0;
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i < files[0].s;
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setvbuf(files[0].files[i++], NULL, _IONBF, 0));
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for(i = 0;
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i < files[1].s;
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setvbuf(files[1].files[i++], NULL, _IONBF, 0));
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if (k) {
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for (
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i = 0; i < files[0].s; setvbuf(files[0].files[i++], NULL, _IONBF, 0)
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);
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for (
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i = 0; i < files[1].s; setvbuf(files[1].files[i++], NULL, _IONBF, 0)
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);
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}
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retval = EX_OK;
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/* Actual program loop. */
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for(i = 0; i < files[0].s; ++i) /* iterate ins */
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while((c = getc(files[0].files[i])) != EOF) /* iterate chars */
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for(j = 0; j < files[1].s; ++j) /* iterate outs */
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if(putc(c, files[1].files[j]) == EOF){
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for (i = 0; i < files[0].s; ++i) { /* iterate ins */
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while ((c = getc(files[0].files[i])) != EOF) { /* iterate chars */
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for (j = 0; j < files[1].s; ++j) { /* iterate outs */
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if (putc(c, files[1].files[j]) == EOF) {
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/* notebook's full */
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retval = EX_IOERR;
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fprintf(stderr, "%s: %s: %s\n",
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program_name, files[1].names[j], strerror(errno));
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if(fclose(files[1].files[j]) == EOF)
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fprintf(stderr, "%s: %s: %s\n",
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program_name, files[1].names[j], strerror(errno));
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fprintf(
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stderr,
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"%s: %s: %s\n",
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program_name,
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files[1].names[j],
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strerror(errno)
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);
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if (fclose(files[1].files[j]) == EOF) {
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fprintf(
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stderr,
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"%s: %s: %s\n",
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program_name,
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files[1].names[j],
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strerror(errno)
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);
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}
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/* massage out the tense muscle */
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for(k = j--; k < files[1].s - 1; ++k){
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files[1].files[k] = files[1].files[k+1];
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files[1].names[k] = files[1].names[k+1];
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}
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if(--files[1].s == 0)
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terminate;
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if(--files[1].s == 0) { terminate; }
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}
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}
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}
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}
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terminate;
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}
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