51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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int main(int argc, char * argv[]) {
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char c; int start_arg = 1;
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int append_mode = 0;
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int file_failed = 0;
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while((c = getopt(argc, argv, "ai")) != -1) {
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switch(c) {
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case 'a': append_mode = 1; break;
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case 'i': signal(SIGINT, SIG_IGN); break;
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}
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}
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FILE * files[27] = { 0 };
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char * mode = append_mode == 1 ? "a+" : "w+";
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int j = 0;
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for(int i = optind; i < argc && j < 27; i++) {
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files[j++] = fopen(argv[i], mode);
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if(files == NULL) {
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fprintf(stderr, "%s: could not open/create file %s\n", argv[0], argv[i]);
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return 1;
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}
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}
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while((c = getchar()) != EOF) {
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putchar(c);
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for(j = 0; files[j] != 0 && j < 27; j++) {
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if(fputc(c, files[j]) == EOF) {
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file_failed = 1;
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}
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}
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}
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for(j = 0; files[j] != 0 && j < 27; j++) {
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if(fclose(files[j]) == EOF) {
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fprintf(stderr, "%s: failed to close file %s\n",
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argv[0], argv[j+start_arg]);
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}
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}
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return file_failed == 0 ? 0 : 2;
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}
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