Fix shell buffer allocation issues

1 files changed, 0 insertions, 271 deletions

diff --git a/main.c b/main.c
deleted file mode 100644
index 53be611..0000000
--- a/main.c
+++ /dev/null
@@ -1,271 +0,0 @@
-#include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <stdarg.h>
-#include <string.h>
-#include <unistd.h>
-#include <glob.h>
-
-#define SYSERROR stderr, "%s:%s:%d: %s\n", __FILE__, __FUNCTION__, __LINE__, strerror(errno)
-#define DIRSEP_WIN32 '\\'
-#define DIRSEP_UNIX '/'
-#if defined(_WIN32)
-#define DIRSEP  DIRSEP_WIN32
-#define NOT_DIRSEP DIRSEP_UNIX
-#else
-#define DIRSEP DIRSEP_UNIX
-#define NOT_DIRSEP DIRSEP_WIN32
-#endif
-
-#define PKG_DIR "../pkgs"
-
-int shell(char *buf, const char *fmt, ...) {
-    char *buf_orig = buf;
-    va_list args;
-    va_start(args, fmt);
-
-    FILE *proc;
-    int status = -1;
-    char *outbuf = (char *)calloc(1, sizeof(char));
-    if (!outbuf) {
-        fprintf(SYSERROR);
-        exit(errno);
-    }
-    char *cmd = (char *)calloc(PATH_MAX, sizeof(char));
-    if (!cmd) {
-        fprintf(SYSERROR);
-        exit(errno);
-    }
-
-    vsnprintf(cmd, sizeof(outbuf), fmt, args);
-
-    proc = popen(cmd, "r");
-    if (!proc) {
-        return status;
-    }
-
-    if (buf != NULL) {
-        while (!feof(proc)) {
-            *outbuf = fgetc(proc);
-            if (isascii(*outbuf)) {
-                *buf = *outbuf;
-            }
-            buf++;
-        }
-        buf = buf_orig;
-    }
-    status = pclose(proc);
-    va_end(args);
-    free(outbuf);
-    free(cmd);
-    return status;
-};
-
-/*
-int tar_extract_file(const char *archive, const char* filename, const char *destination) {
-    int status = -1;
-    char cmd[PATH_MAX];
-    char output[3];
-    sprintf(cmd, "tar xf %s %s -C %s 2>&1", archive, filename, destination);
-    FILE *proc = popen(cmd, "r");
-    if (!proc) {
-        return status;
-    }
-    while (!feof(proc)) {
-        fgets(output, 2, proc);
-        printf("%s", output);
-    }
-    putchar('\n');
-    return pclose(proc);
-};
- */
-
-int errglob(const char *epath, int eerrno) {
-    fprintf(stderr, "glob matching error: %s (%d)", epath, eerrno);
-    return eerrno;
-}
-
-int num_chars(const char *sptr, int ch) {
-    int result = 0;
-    for (int i = 0; sptr[i] != '\0'; i++) {
-        if (sptr[i] == ch) {
-            result++;
-        }
-    }
-    return result;
-}
-
-int startswith(const char *sptr, const char *pattern) {
-    for (int i = 0; i < strlen(pattern); i++) {
-        if (sptr[i] != pattern[i]) {
-            return -1;
-        }
-    }
-    return 0;
-}
-
-int endswith(const char *sptr, const char *pattern) {
-    size_t sptr_size = strlen(sptr);
-    size_t pattern_size = strlen(pattern);
-    for (size_t s = sptr_size - pattern_size, p = 0 ; s < sptr_size; s++, p++) {
-        if (sptr[s] != pattern[p]) {
-            return -1;
-        }
-    }
-    return 0;
-}
-
-char *normpath(const char *path) {
-    // Convert Win32 path to Unix path, and vice-versa
-    char *result = strdup(path);
-    char *tmp = result;
-
-    while (*tmp) {
-        if (*tmp == NOT_DIRSEP) {
-            *tmp = DIRSEP;
-            tmp++;
-            continue;
-        }
-        tmp++;
-    }
-    return result;
-}
-
-/**
- * This function scans `sptr` from right to left removing any matches to `suffix` from `sptr`
- *
- * @param sptr string to be modified
- * @param suffix string to be removed from `sptr`
- */
-void strip(char *sptr, const char *suffix) {
-    size_t sptr_len = strlen(sptr);                     //!< length of sptr
-    size_t suffix_len = strlen(suffix);                 //!< length of suffix
-    intptr_t target_offset = sptr_len - suffix_len;     //!< offset to possible suffix
-
-    // Prevent access to memory below input string
-    if (target_offset < 0) {
-        return;
-    }
-
-    // Create a pointer to where the suffix should be
-    char *target = sptr + target_offset;                //!< pointer to possible suffix
-    if (!strcmp(target, suffix)) {
-        // Purge the suffix
-        memset(target, '\0', suffix_len);
-        // Recursive call continues removing suffix until they are gone
-        strip(sptr, suffix);
-    }
-}
-
-/**
- * Deletes any characters matching `chars` from `sptr` string
- *
- * @param s string to be modified in-place
- * @param chars a string containing characters (e.g. " \n" would delete whitespace and line feeds)
- */
-void strchrdel(char *sptr, const char *chars) {
-    while (*sptr != '\0') {
-        for (int i = 0; chars[i] != '\0'; i++) {
-           if (*sptr == chars[i]) {
-               memmove(sptr, sptr + 1, strlen(sptr));
-           }
-        }
-        sptr++;
-    }
-}
-
-char *find_file(const char *root, const char *filename) {
-    glob_t results;
-    int glob_flags = 0;
-    int match = 0;
-    char *rootpath = NULL;
-    char *path = NULL;
-
-    // GUARD
-    if (!root || !filename || strstr(filename, "..") || strstr(filename, "./")) {
-        return NULL;
-    }
-
-    if (!(path = (char *)calloc(PATH_MAX + 1, sizeof(char)))) {
-        fprintf(SYSERROR);
-        exit(errno);
-    }
-
-    if (!(rootpath = realpath(root, NULL))) {
-        return NULL;
-    }
-
-    strcat(path, rootpath);
-    strcat(path, "/");
-    strcat(path, filename);
-
-    // Save a little time if the file exists
-    if (access(path, F_OK) != -1) {
-        return path;
-    }
-
-    // Inject wildcard
-    strcat(path, "*");
-    // Search for the file
-    match = glob(path, glob_flags, errglob, &results);
-
-    if (match != 0) {
-        // report critical errors except GLOB_NOMATCH
-        if (match == GLOB_NOSPACE || match == GLOB_ABORTED) {
-            fprintf(SYSERROR);
-        }
-        return NULL;
-    }
-
-    // Resize path to the length of the first match
-    char *want = results.gl_pathv[0];
-    if (!(path = (char *)realloc(path, strlen(want) + 1))) {
-        fprintf(SYSERROR);
-        exit(errno);
-    }
-
-    // Replace path string with wanted path string
-    strncpy(path, want, strlen(want));
-
-    free(rootpath);
-    globfree(&results);
-    return path;
-}
-
-char *find_package(const char *filename) {
-    return find_file(PKG_DIR, filename);
-}
-
-int main() {
-    const char *pkg_name = "python";
-    char *package = NULL;
-    package = find_package(pkg_name);
-    if (package != NULL) {
-        printf("Package found: %s\n", package);
-        free(package);
-    }
-    else {
-        fprintf(stderr,"Package does not exist: %s\n", pkg_name);
-    }
-
-    const char *testpath = "x:\\a\\b\\c";
-    const char *teststring = "this is test!";
-    char *normalized = normpath(testpath);
-    char buf[10240];
-    memset(buf, 0, sizeof(buf));
-
-    printf("%s becomes %s\n", testpath, normalized);
-    printf("%d\n", startswith(testpath, "x:\\"));
-    printf("%d\n", endswith(teststring, "test!"));
-    //tar_extract_file("one", "two", testpath);
-
-    int retval = -1;
-    retval = shell(buf, "env");
-    strip(buf, "\n");
-    printf("%s\n", buf);
-
-    free(normalized);
-    return 0;
-}
\ No newline at end of file