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https://github.com/eddyem/eddys_snippets.git
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53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <err.h>
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void help(char* name){
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printf("\nUsage:\n\t%s <file1> <file2>\n\t\tprint lines of <file1>, that not present in <file2>\n", name);
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printf("\t%s -v <file1> < file2>\n\t\tshows lines of <file1>, that present in <file2>\n", name);
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exit(0);
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}
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int main(int argc, char** argv){
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char *buf, *F1, *F2, *ptr, *ptr1;
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int file1, file2, n = 0, Vflag = 0;
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long size1, size2;
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struct stat St;
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if(argc < 3 || strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) help(argv[0]);
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if(strcmp(argv[1], "-v") == 0){ Vflag = 1; n = 1;}
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if( stat(argv[n+1], &St) < 0) err(1, "\n\tCan't stat %s", argv[n+1]);
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size1 = St.st_size;
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if( stat(argv[n+2], &St) < 0) err(2, "\n\tCan't stat %s", argv[n+2]);
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size2 = St.st_size;
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file1 = open(argv[n+1], O_RDONLY);
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if(file1 < 0) err(3, "\n\tCan't open %s", argv[n+1]);
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file2 = open(argv[n+2], O_RDONLY);
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if(file2 < 0) err(4, "\n\tCan't open %s", argv[n+2]);
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buf = malloc(16385); // ÂÕÆÅÒ ÄÌÑ ÓÔÒÏËÉ
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F1 = malloc(size1 + 1); // ÓÏÄÅÒÖÉÍÏÅ ÆÁÊÌÁ 1
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ptr1 = F1;
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F2 = malloc(size2 + 1); // ÓÏÄÅÒÖÉÍÏÅ ÆÁÊÌÁ 2
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if(read(file1, F1, size1) != size1) err(5, "\n\tCan't read %s", argv[n+1]);
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F1[size1] = 0;
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close(file1);
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if(read(file2, F2, size2) != size2) err(6, "\n\tCan't read %s", argv[n+2]);
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F2[size2] = 0;
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close(file2);
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while(ptr1){
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ptr = strchr(ptr1, '\n');
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if(ptr) *ptr = 0;
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strncpy(buf, ptr1, 16384);
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if(strstr(F2, buf) == NULL){ if (Vflag == 0) printf("%s\n", buf);}
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else if(Vflag == 1) printf("%s\n", buf);
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if(ptr) ptr1 = ptr + 1;
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else ptr1 = NULL; // ËÏÎÅÃ ÓÔÒÏËÉ
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}
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free(buf); free(F1); free(F2);
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exit(0);
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}
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