71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
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//https://iq.opengenus.org/ls-command-in-c/
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//Used for basic input/output stream
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#include <stdio.h>
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//Used for handling directory files
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#include <dirent.h>
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//For EXIT codes and error handling
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#include <errno.h>
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#include <stdlib.h>
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void _ls(const char *dir,int op_a,int op_l)
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{
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//Here we will list the directory
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struct dirent *d;
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DIR *dh = opendir(dir);
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if (!dh)
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{
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if (errno = ENOENT)
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{
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//If the directory is not found
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perror("Directory doesn't exist");
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}
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else
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{
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//If the directory is not readable then throw error and exit
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perror("Unable to read directory");
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}
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exit(EXIT_FAILURE);
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}
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//While the next entry is not readable we will print directory files
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while ((d = readdir(dh)) != NULL)
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{
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//If hidden files are found we continue
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if (!op_a && d->d_name[0] == '.')
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continue;
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printf("%s ", d->d_name);
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if(op_l) printf("\n");
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}
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if(!op_l)
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printf("\n");
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}
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int main(int argc, const char *argv[])
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{
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if (argc == 1)
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{
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_ls(".",0,0);
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}
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else if (argc == 2)
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{
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if (argv[1][0] == '-')
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{
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//Checking if option is passed
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//Options supporting: a, l
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int op_a = 0, op_l = 0;
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char *p = (char*)(argv[1] + 1);
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while(*p){
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if(*p == 'a') op_a = 1;
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else if(*p == 'l') op_l = 1;
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else{
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perror("Option not available");
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exit(EXIT_FAILURE);
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}
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p++;
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}
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_ls(".",op_a,op_l);
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}
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}
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return 0;
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}
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