split libreport to a separate package

1 files changed, 410 insertions, 0 deletions

diff --git a/libreport/src/lib/xfuncs.c b/libreport/src/lib/xfuncs.c
new file mode 100644
index 00000000..67b61d40
--- /dev/null
+++ b/libreport/src/lib/xfuncs.c
@@ -0,0 +1,410 @@
+/*
+    Copyright (C) 2010  ABRT team
+    Copyright (C) 2010  RedHat Inc
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+/*
+ * Utility routines.
+ *
+ */
+#include "libreport.h"
+
+/* Turn on nonblocking I/O on a fd */
+int ndelay_on(int fd)
+{
+    int flags = fcntl(fd, F_GETFL);
+    if (flags & O_NONBLOCK)
+        return 0;
+    return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
+}
+
+int ndelay_off(int fd)
+{
+    int flags = fcntl(fd, F_GETFL);
+    if (!(flags & O_NONBLOCK))
+        return 0;
+    return fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
+}
+
+int close_on_exec_on(int fd)
+{
+    return fcntl(fd, F_SETFD, FD_CLOEXEC);
+}
+
+// Die if we can't allocate size bytes of memory.
+void* xmalloc(size_t size)
+{
+    void *ptr = malloc(size);
+    if (ptr == NULL && size != 0)
+        die_out_of_memory();
+    return ptr;
+}
+
+// Die if we can't resize previously allocated memory.  (This returns a pointer
+// to the new memory, which may or may not be the same as the old memory.
+// It'll copy the contents to a new chunk and free the old one if necessary.)
+void* xrealloc(void *ptr, size_t size)
+{
+    ptr = realloc(ptr, size);
+    if (ptr == NULL && size != 0)
+        die_out_of_memory();
+    return ptr;
+}
+
+// Die if we can't allocate and zero size bytes of memory.
+void* xzalloc(size_t size)
+{
+    void *ptr = xmalloc(size);
+    memset(ptr, 0, size);
+    return ptr;
+}
+
+// Die if we can't copy a string to freshly allocated memory.
+char* xstrdup(const char *s)
+{
+    char *t;
+    if (s == NULL)
+        return NULL;
+
+    t = strdup(s);
+
+    if (t == NULL)
+        die_out_of_memory();
+
+    return t;
+}
+
+// Die if we can't allocate n+1 bytes (space for the null terminator) and copy
+// the (possibly truncated to length n) string into it.
+char* xstrndup(const char *s, int n)
+{
+    int m;
+    char *t;
+
+    /* We can just xmalloc(n+1) and strncpy into it, */
+    /* but think about xstrndup("abc", 10000) wastage! */
+    m = n;
+    t = (char*) s;
+    while (m)
+    {
+        if (!*t) break;
+        m--;
+        t++;
+    }
+    n -= m;
+    t = (char*) xmalloc(n + 1);
+    t[n] = '\0';
+
+    return (char*) memcpy(t, s, n);
+}
+
+void xpipe(int filedes[2])
+{
+    if (pipe(filedes))
+        perror_msg_and_die("can't create pipe");
+}
+
+void xdup(int from)
+{
+    if (dup(from) < 0)
+        perror_msg_and_die("can't duplicate file descriptor");
+}
+
+void xdup2(int from, int to)
+{
+    if (dup2(from, to) != to)
+        perror_msg_and_die("can't duplicate file descriptor");
+}
+
+// "Renumber" opened fd
+void xmove_fd(int from, int to)
+{
+    if (from == to)
+        return;
+    xdup2(from, to);
+    close(from);
+}
+
+// Die with an error message if we can't write the entire buffer.
+void xwrite(int fd, const void *buf, size_t count)
+{
+    if (count == 0)
+        return;
+    ssize_t size = full_write(fd, buf, count);
+    if ((size_t)size != count)
+        error_msg_and_die("short write");
+}
+
+void xwrite_str(int fd, const char *str)
+{
+    xwrite(fd, str, strlen(str));
+}
+
+// Die with an error message if we can't lseek to the right spot.
+off_t xlseek(int fd, off_t offset, int whence)
+{
+    off_t off = lseek(fd, offset, whence);
+    if (off == (off_t)-1) {
+        if (whence == SEEK_SET)
+            perror_msg_and_die("lseek(%llu)", (long long)offset);
+        perror_msg_and_die("lseek");
+    }
+    return off;
+}
+
+void xchdir(const char *path)
+{
+    if (chdir(path))
+        perror_msg_and_die("chdir(%s)", path);
+}
+
+char* xvasprintf(const char *format, va_list p)
+{
+    int r;
+    char *string_ptr;
+
+#if 1
+    // GNU extension
+    r = vasprintf(&string_ptr, format, p);
+#else
+    // Bloat for systems that haven't got the GNU extension.
+    va_list p2;
+    va_copy(p2, p);
+    r = vsnprintf(NULL, 0, format, p);
+    string_ptr = xmalloc(r+1);
+    r = vsnprintf(string_ptr, r+1, format, p2);
+    va_end(p2);
+#endif
+
+    if (r < 0)
+        die_out_of_memory();
+    return string_ptr;
+}
+
+// Die with an error message if we can't malloc() enough space and do an
+// sprintf() into that space.
+char* xasprintf(const char *format, ...)
+{
+    va_list p;
+    char *string_ptr;
+
+    va_start(p, format);
+    string_ptr = xvasprintf(format, p);
+    va_end(p);
+
+    return string_ptr;
+}
+
+void xsetenv(const char *key, const char *value)
+{
+    if (setenv(key, value, 1))
+        die_out_of_memory();
+}
+
+void safe_unsetenv(const char *var_val)
+{
+    //char *name = xstrndup(var_val, strchrnul(var_val, '=') - var_val);
+    //unsetenv(name);
+    //free(name);
+
+    /* Avoid malloc/free (name is usually very short) */
+    unsigned len = strchrnul(var_val, '=') - var_val;
+    char name[len + 1];
+    memcpy(name, var_val, len);
+    name[len] = '\0';
+    unsetenv(name);
+}
+
+// Die with an error message if we can't open a new socket.
+int xsocket(int domain, int type, int protocol)
+{
+    int r = socket(domain, type, protocol);
+    if (r < 0)
+    {
+        const char *s = "INET";
+        if (domain == AF_PACKET) s = "PACKET";
+        if (domain == AF_NETLINK) s = "NETLINK";
+        if (domain == AF_INET6) s = "INET6";
+        perror_msg_and_die("socket(AF_%s)", s);
+    }
+
+    return r;
+}
+
+// Die with an error message if we can't bind a socket to an address.
+void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen)
+{
+    if (bind(sockfd, my_addr, addrlen))
+        perror_msg_and_die("bind");
+}
+
+// Die with an error message if we can't listen for connections on a socket.
+void xlisten(int s, int backlog)
+{
+    if (listen(s, backlog))
+        perror_msg_and_die("listen");
+}
+
+// Die with an error message if sendto failed.
+// Return bytes sent otherwise
+ssize_t xsendto(int s, const void *buf, size_t len,
+                const struct sockaddr *to,
+                socklen_t tolen)
+{
+    ssize_t ret = sendto(s, buf, len, 0, to, tolen);
+    if (ret < 0)
+    {
+        close(s);
+        perror_msg_and_die("sendto");
+    }
+    return ret;
+}
+
+// xstat() - a stat() which dies on failure with meaningful error message
+void xstat(const char *name, struct stat *stat_buf)
+{
+    if (stat(name, stat_buf))
+        perror_msg_and_die("can't stat '%s'", name);
+}
+
+// Die if we can't open a file and return a fd
+int xopen3(const char *pathname, int flags, int mode)
+{
+    int ret;
+    ret = open(pathname, flags, mode);
+    if (ret < 0)
+        perror_msg_and_die("can't open '%s'", pathname);
+    return ret;
+}
+
+// Die if we can't open an existing file and return a fd
+int xopen(const char *pathname, int flags)
+{
+    return xopen3(pathname, flags, 0666);
+}
+
+void xunlink(const char *pathname)
+{
+    if (unlink(pathname))
+        perror_msg_and_die("Can't remove file '%s'", pathname);
+}
+
+#if 0 //UNUSED
+// Warn if we can't open a file and return a fd.
+int open3_or_warn(const char *pathname, int flags, int mode)
+{
+    int ret;
+    ret = open(pathname, flags, mode);
+    if (ret < 0)
+        perror_msg("can't open '%s'", pathname);
+    return ret;
+}
+
+// Warn if we can't open a file and return a fd.
+int open_or_warn(const char *pathname, int flags)
+{
+    return open3_or_warn(pathname, flags, 0666);
+}
+#endif
+
+/* Just testing dent->d_type == DT_REG is wrong: some filesystems
+ * do not report the type, they report DT_UNKNOWN for every dirent
+ * (and this is not a bug in filesystem, this is allowed by standards).
+ */
+int is_regular_file(struct dirent *dent, const char *dirname)
+{
+    if (dent->d_type == DT_REG)
+        return 1;
+    if (dent->d_type != DT_UNKNOWN)
+        return 0;
+
+    char *fullname = xasprintf("%s/%s", dirname, dent->d_name);
+    struct stat statbuf;
+    int r = lstat(fullname, &statbuf);
+    free(fullname);
+
+    return r == 0 && S_ISREG(statbuf.st_mode);
+}
+
+/* Is it "." or ".."? */
+/* abrtlib candidate */
+bool dot_or_dotdot(const char *filename)
+{
+    if (filename[0] != '.') return false;
+    if (filename[1] == '\0') return true;
+    if (filename[1] != '.') return false;
+    if (filename[2] == '\0') return true;
+    return false;
+}
+
+/* Find out if the last character of a string matches the one given.
+ * Don't underrun the buffer if the string length is 0.
+ */
+char *last_char_is(const char *s, int c)
+{
+    if (s && *s)
+    {
+        s += strlen(s) - 1;
+        if ((unsigned char)*s == c)
+            return (char*)s;
+    }
+    return NULL;
+}
+
+bool string_to_bool(const char *s)
+{
+    if (s[0] == '1' && s[1] == '\0')
+        return true;
+    if (strcasecmp(s, "on") == 0)
+        return true;
+    if (strcasecmp(s, "yes") == 0)
+        return true;
+    if (strcasecmp(s, "true") == 0)
+        return true;
+    return false;
+}
+
+void xseteuid(uid_t euid)
+{
+    if (seteuid(euid) != 0)
+        perror_msg_and_die("can't set %cid %lu", 'u', (long)euid);
+}
+
+void xsetegid(gid_t egid)
+{
+    if (setegid(egid) != 0)
+        perror_msg_and_die("can't set %cid %lu", 'g', (long)egid);
+}
+
+void xsetreuid(uid_t ruid, uid_t euid)
+{
+    if (setreuid(ruid, euid) != 0)
+        perror_msg_and_die("can't set %cid %lu", 'u', (long)ruid);
+}
+
+void xsetregid(gid_t rgid, gid_t egid)
+{
+    if (setregid(rgid, egid) != 0)
+        perror_msg_and_die("can't set %cid %lu", 'g', (long)rgid);
+}
+
+const char *get_home_dir(uid_t uid)
+{
+    struct passwd* pw = getpwuid(uid);
+    // TODO: handle errno
+    return pw ? pw->pw_dir : NULL;
+}