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#include <err.h>
#include <errno.h>
#include <ftw.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#define PATCH_DIR ".cvn"
#define BASE PATCH_DIR "/base"
#define EXCLUDE_PATHS PATCH_DIR "ignore"
static inline void init(int argc, char *argv[]);
static inline void status(int argc, char *argv[]);
struct command {
char *name;
void (*func)(int argc, char *argv[]);
};
struct command cmd[] = {
{"init", init},
{"status", status},
{NULL, NULL}
};
int main(int argc, char *argv[])
{
int i;
if (argc < 2)
errx(1, "Usage: %s <command> [<args>]", argv[0]);
for (i = 0; cmd[i].name != NULL; i++) {
if (strcmp(argv[1], cmd[i].name) == 0) {
cmd[i].func(argc - 1, argv + 1);
return 0;
}
}
return 0;
}
static inline void init(int argc, char *argv[])
{
int opt;
char *branch;
optind = 1;
while ((opt = getopt(argc, argv, "b:")) != -1) {
switch (opt) {
case 'b':
branch = optarg;
break;
default:
break;
}
}
if (mkdir(PATCH_DIR, 0755) == -1) {
if (errno != EEXIST)
err(1, "Failed to create repository");
}
if (mkdir(BASE, 0755) == -1) {
if (errno != EEXIST)
err(1, "Failed to create base directory.");
}
printf("Ready\n");
}
static inline void status(int argc, char *argv[])
{
FILE *fp;
pid_t pid;
int status;
int pipefd[2];
char line[1024];
if (pipe(pipefd) == -1)
err(1, "pipe()");
if ((pid = fork()) == -1)
err(1, "fork()");
if (pid == 0) {
close(pipefd[0]);
dup2(pipefd[1], STDOUT_FILENO);
close(pipefd[1]);
if (access(EXCLUDE_PATHS, F_OK) == 0) {
char *args[] = {"diff", "-x", PATCH_DIR, "-X",
EXCLUDE_PATHS, "-rq", BASE, ".", NULL};
execvp("diff", args);
} else {
char *args[] = {"diff", "-x", PATCH_DIR, "-rq", BASE, ".", NULL};
execvp("diff", args);
}
err(1, "execvp");
} else {
waitpid(pid, &status, 0);
close(pipefd[1]);
if (!(fp = fdopen(pipefd[0], "r")))
err(1, "fdopen()");
const char *src = "Only in .: ";
const char *rep = "(N) ";
while (fgets(line, sizeof(line), fp) != NULL) {
if (strncmp(line, src, strlen(src)) == 0)
printf("%s%s", rep, line + strlen(src));
else
printf("%s", line);
}
fclose(fp);
waitpid(pid, &status, 0);
}
}
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