apio
ae7bf076dc
Apart from potentionally leaking malloced memory on error, which isn't too bad since we immediately exit afterwards, we were leaving all opened files dangling, as fclose() was never called.
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
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* Copyright (c) 2023, apio.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* pack.c: Example utility which creates a tar archive (POSIX only).
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*/
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#define _XOPEN_SOURCE 700
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#include <minitar.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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int main(int argc, char** argv)
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{
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if (argc < 3)
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{
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fprintf(stderr, "Usage: %s [output] files\n", argv[0]);
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return 1;
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}
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struct minitar_w mp;
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if (minitar_open_w(argv[1], &mp, MTAR_OVERWRITE) != 0)
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{
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perror(argv[1]);
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return 1;
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}
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int exit_status = 0;
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int arg = 2;
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while (arg < argc)
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{
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FILE* fp = fopen(argv[arg], "r");
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if (!fp)
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{
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perror("fopen");
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exit_status = 1;
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break;
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}
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// Get the file length.
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fseek(fp, 0, SEEK_END);
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size_t length = ftell(fp);
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fseek(fp, 0, SEEK_SET);
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char* buf = malloc(length);
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if (!buf)
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{
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perror("malloc");
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fclose(fp);
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exit_status = 1;
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break;
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}
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fread(buf, 1, length, fp);
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if (ferror(fp))
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{
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perror("fread");
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goto err;
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}
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struct stat st;
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int rc = fstat(fileno(fp), &st);
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if (rc < 0)
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{
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perror("fstat");
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goto err;
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}
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struct minitar_entry_metadata metadata;
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strncpy(metadata.path, argv[arg], sizeof(metadata.path));
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metadata.uid = st.st_uid;
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metadata.gid = st.st_gid;
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metadata.mtime = st.st_mtime;
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metadata.size = length;
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metadata.type = MTAR_REGULAR;
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metadata.mode = st.st_mode & ~S_IFMT;
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rc = minitar_write_file_entry(&mp, &metadata, buf);
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free(buf);
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fclose(fp);
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if (rc != 0)
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{
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perror("write entry failed");
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exit_status = 1;
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break;
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}
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arg++;
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continue;
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err:
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free(buf);
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fclose(fp);
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exit_status = 1;
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break;
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}
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minitar_close_w(&mp);
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return exit_status;
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} |