66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* fromdos.c : strip the stupid ^M characters without mistakes! */
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/* this can do in-place conversion or be used as a pipe... */
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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int main(int argc, char** argv) {
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int f,c;
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if (argc <= 1) {
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if (isatty(0)) {
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fprintf(stderr,"usage : %s <files>\nStrips ^M characters.\nCan do in-place conversion of many files or can be used in a pipe\n",argv[0]);
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return 1;
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}
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for (;;) {
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c = getchar();
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while (c == '\r') {
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c = getchar();
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if (c != '\n') putchar(c);
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}
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if (c < 0) break;
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putchar(c);
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}
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return 0;
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}
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for (f = 1; f < argc; f++) {
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char* fname = argv[f];
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char tempname[1024];
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FILE* in = fopen(fname,"rb");
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FILE* out;
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int mod = 0;
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if (!in) {
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fprintf(stderr,"%s : %s\n", fname, strerror(errno));
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return 1;
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}
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strcpy(tempname, fname);
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strcat(tempname, ".temp");
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out = fopen(tempname, "wb");
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if (!out) {
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fprintf(stderr,"%s : %s\n", fname, strerror(errno));
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return 1;
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}
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for (;;) {
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c = getc(in);
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while (c == '\r') {
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c = getc(in);
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if (c == '\n') mod=1; else putc(c,out);
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}
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if (c < 0) break;
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putc(c,out);
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}
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fclose(in);
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fclose(out);
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if (!mod) {
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fprintf(stderr,"%s : no change\n", fname);
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unlink(tempname);
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} else if (rename(tempname, fname)) {
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fprintf(stderr,"Can't mv %s %s : %s\n",tempname,fname,strerror(errno));
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return 1;
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}
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}
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return 0;
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}
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